10-K 1 tti10k-20160229.htm 10-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON D.C. 20549

FORM 10-K
(MARK ONE)
[ X ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
FOR THE FISCAL YEAR ENDED DECEMBER 31, 2015
OR
[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO .
COMMISSION FILE NUMBER 1-13455
TETRA Technologies, Inc.
(EXACT NAME OF THE REGISTRANT AS SPECIFIED IN ITS CHARTER)

DELAWARE | 74-2148293
(STATE OR OTHER JURISDICTION OF | (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION) | IDENTIFICATION NO.)
24955 INTERSTATE 45 NORTH |
THE WOODLANDS, TEXAS | 77380
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) | (ZIP CODE)
REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (281) 367-1983

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:
COMMON STOCK, PAR VALUE $.01 PER SHARE | NEW YORK STOCK EXCHANGE
(TITLE OF CLASS) | (NAME OF EXCHANGE ON WHICH REGISTERED)
S ECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: NONE

INDICATE BY CHECK MARK IF THE REGISTRANT IS A WELL-KNOWN SEASONED ISSUER (AS DEFINED IN RULE 405 OF THE SECURITIES ACT).
YES [ X ] NO [ ]
INDICATE BY CHECK MARK IF THE REGISTRANT IS NOT REQUIRED TO FILE REPORTS PURSUANT TO SECTION 13 OR SECTION 15(d) OF THE ACT.
YES [ ] NO [ X ]
INDICATE BY CHECK MARK WHETHER THE REGISTRANT (1) HAS FILED ALL REPORTS REQUIRED TO BE FILED BY SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DURING THE PRECEDING 12 MONTHS (OR FOR SUCH SHORTER PERIOD THAT THE REGISTRANT WAS REQUIRED TO FILE SUCH REPORTS) AND (2) HAS BEEN SUBJECT TO SUCH FILING REQUIREMENTS FOR THE PAST 90 DAYS. YES [ X ] NO [ ]
INDICATE BY CHECK MARK WHETHER THE REGISTRANT HAS SUBMITTED ELECTRONICALLY AND POSTED ON ITS CORPORATE WEB SITE, IF ANY, EVERY INTERACTIVE DATA FILE REQUIRED TO BE SUBMITTED AND POSTED PURSUANT TO RULE 405 OF REGULATION S-T DURING THE PRECEDING 12 MONTHS (OR FOR SUCH SHORTER PERIOD THAT THE REGISTRANT WAS REQUIRED TO SUBMIT AND POST SUCH FILES).
YES [ X ] NO [ ]
INDICATE BY CHECK MARK IF DISCLOSURE OF DELINQUENT FILERS PURSUANT TO ITEM 405 OF REGULATION S-K IS NOT CONTAINED HEREIN, AND WILL NOT BE CONTAINED, TO THE BEST OF REGISTRANT’S KNOWLEDGE, IN DEFINITIVE PROXY OR INFORMATION STATEMENTS INCORPORATED BY REFERENCE IN PART III OF THIS FORM 10-K OR ANY AMENDMENT TO THIS FORM 10-K. [ ]
INDICATE BY CHECK MARK WHETHER THE REGISTRANT IS A LARGE ACCELERATED FILER, AN ACCELERATED FILER, A NON-ACCELERATED FILER, OR A SMALLER REPORTING COMPANY. SEE THE DEFINITIONS OF “LARGE ACCELERATED FILER,” “ACCELERATED FILER,” AND “SMALLER REPORTING COMPANY” IN RULE 12b-2 OF THE EXCHANGE ACT. (CHECK ONE):

LARGE ACCELERATED FILER [ ] | ACCELERATED FILER [ X ] | NON-ACCELERATED FILER [ ] | SMALLER REPORTING COMPANY [ ]

INDICATE BY CHECK MARK WHETHER THE REGISTRANT IS A SHELL COMPANY (AS DEFINED IN RULE 12b-2 OF THE EXCHANGE ACT).
YES [ ] NO [ X ]
THE AGGREGATE MARKET VALUE OF COMMON STOCK HELD BY NON-AFFILIATES OF THE REGISTRANT WAS $469,749,193 AS OF JUNE 30, 2015, THE LAST BUSINESS DAY OF THE REGISTRANT’S MOST RECENTLY COMPLETED SECOND FISCAL QUARTER.
NUMBER OF SHARES OUTSTANDING OF THE ISSUER’S COMMON STOCK AS OF FEBRUARY 29, 2016, WAS 80,256,544 SHARES.
DOCUMENTS INCORPORATED BY REFERENCE
PART III INFORMATION IS INCORPORATED BY REFERENCE TO THE REGISTRANT’S PROXY STATEMENT FOR ITS ANNUAL MEETING OF STOCKHOLDERS TO BE HELD MAY 3, 2016, TO BE FILED WITH THE SECURITIES AND EXCHANGE COMMISSION WITHIN 120 DAYS OF THE END OF THE REGISTRANT’S FISCAL YEAR.

TABLE OF CONTENTS

| Part I |
Item 1. | Business | 1
Item 1A. | Risk Factors | 12
Item 1B. | Unresolved Staff Comments | 25
Item 2. | Properties | 25
Item 3. | Legal Proceedings | 26
Item 4. | Mine Safety Disclosures | 26
| Part II |
Item 5. | Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities | 26
Item 6. | Selected Financial Data | 28
Item 7. | Management’s Discussion and Analysis of Financial Condition and Results of Operation | 30
Item 7A. | Quantitative and Qualitative Disclosures about Market Risk | 60
Item 8. | Financial Statements and Supplementary Data | 62
Item 9. | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure | 62
Item 9A. | Controls and Procedures | 62
Item 9B. | Other Information | 63
| Part III |
Item 10. | Directors, Executive Officers, and Corporate Governance | 64
Item 11. | Executive Compensation | 64
Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 64
Item 13. | Certain Relationships and Related Transactions, and Director Independence | 64
Item 14. | Principal Accounting Fees and Services | 64
| Part IV |
Item 15. | Exhibits, Financial Statement Schedules | 65

Forward-Looking Statements
This Annual Report on Form 10-K contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements in this Annual Report are identifiable by the use of the following words and other similar words: “anticipates”, “assumes”, “believes”, “budgets”, “could”, “estimates”, “expects”, “forecasts”, “goal”, “intends”, “may”, “might”, “plans”, “predicts”, “projects”, “schedules”, “seeks”, “should, “targets”, “will”, and “would”.
Such forward-looking statements reflect our current views with respect to future events and financial performance and are based on assumptions that we believe to be reasonable, but such forward-looking statements
are subject to numerous risks, and uncertainties, including, but not limited to:

• | economic and operating conditions that are outside of our control, including the supply, demand, and prices of crude oil and natural gas;

• | the levels of competition we encounter;

• | the activity levels of our customers;

• | the availability of adequate sources of capital to us;

• | our ability to comply with contractual obligations, including those under our financing arrangements;

• | our operational performance;

• | risks related to acquisitions and our growth strategy;

• | the availability of raw materials and labor at reasonable prices;

• | risks related to our foreign operations;

• | the effect and results of litigation, regulatory matters, settlements, audits, assessments, and contingencies;

• | information technology risks including the risk from cyberattack, and

• | other risks and uncertainties under “Item 1A. Risk Factors” in this Annual Report and as included in our other filings with the U.S. Securities and Exchange Commission (“SEC”), which are available free of charge on the SEC website at www.sec.gov.

The risks and uncertainties referred to above are generally beyond our ability to control, and we cannot predict all the risks and uncertainties that could cause our actual results to differ from those indicated by the forward-looking statements. If any of these risks or uncertainties materialize, or if any of the underlying assumptions prove incorrect, actual results may vary from those indicated by the forward-looking statements, and such variances may be material.
All subsequent written and oral forward-looking statements made by or attributable to us or to persons acting on our behalf are expressly qualified in their entirety by reference to these risks and uncertainties. You should not place undue reliance on forward-looking statements. Each forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to update or revise any forward-looking statements we may make, except as may be required by law.
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PART I
Item 1. Business.
The financial statements presented in this Annual Report are the consolidated financial statements of TETRA Technologies, Inc., a Delaware corporation and its subsidiaries. When the terms “TETRA,” “the Company,” “we,” “us,” or “our” are used in this document, those terms refer to TETRA Technologies, Inc. and its consolidated subsidiaries.
TETRA is a Delaware corporation, incorporated in 1981. Our corporate headquarters are located at 24955 Interstate 45 North in The Woodlands, Texas. Our phone number is 281-367-1983, and our website is accessed at www.tetratec.com. Our common stock is traded on the New York Stock Exchange under the symbol “TTI.”
Our Corporate Governance Guidelines, Code of Business Conduct, Code of Ethics for Senior Financial Officers, Audit Committee Charter, Compensation Committee Charter, and Nominating and Corporate Governance Committee Charter, as well as our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K, and all amendments to those reports are all available, free of charge, on our website at www.tetratec.com as soon as practicable after we file the reports with the SEC. Information contained on or connected to our website is not, and shall not be deemed to be, a part of this Annual Report on Form 10-K or incorporated into any other filings with the SEC. The documents referenced above are available in print at no cost to any stockholder who requests them by writing or telephoning our Corporate Secretary.
About TETRA
TETRA Technologies, Inc., together with its consolidated subsidiaries, is a leading, geographically diversified oil and gas services company, focused on completion fluids and associated products and services, water management, frac flowback, production well testing, offshore rig cooling, compression services and equipment, and selected offshore services including well plugging and abandonment, decommissioning, and diving. We also have a limited domestic oil and gas production business. We are composed of five reporting segments organized into four divisions - Fluids, Production Testing, Compression, and Offshore.
Our Fluids Division manufactures and markets clear brine fluids, additives, and associated products and services to the oil and gas industry for use in well drilling, completion, and workover operations in the United States and in certain countries in Latin America, Europe, Asia, the Middle East, and Africa. The division also markets liquid and dry calcium chloride products manufactured at its production facilities or purchased from third-party suppliers to a variety of markets outside the energy industry. The Fluids Division also provides domestic onshore oil and gas operators with a wide variety of water management services.
Our Production Testing Division provides frac flowback, production well testing, offshore rig cooling, and other associated services in many of the major oil and gas producing regions in the United States, Mexico, and Canada, as well as in basins in certain regions in South America, Africa, Europe, the Middle East, and Australia.
Our Compression Division is a provider of compression services and equipment for natural gas and oil production, gathering, transportation, processing, and storage. The Compression Division's equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield pump systems designed and fabricated at the division's facilities, as well as the sale of compressor package parts and components manufactured by third-party suppliers. The Compression Division's aftermarket services business provides compressor package reconfiguration and maintenance services. The Compression Division provides its services and equipment to a broad base of natural gas and oil exploration and production, midstream, transmission, and storage companies operating throughout many of the onshore producing regions of the United States as well as in a number of foreign countries, including Mexico, Canada, and Argentina.
Our Offshore Division consists of two operating segments: Offshore Services and Maritech. The Offshore Services segment provides: (1) downhole and subsea services such as well plugging and abandonment, and workover services; (2) decommissioning and certain construction services utilizing heavy lift barges and various cutting technologies with regard to offshore oil and gas production platforms and pipelines; and (3) conventional and saturation diving services.
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The Maritech segment is a limited oil and gas production operation. During 2011 and the first quarter of 2012, Maritech sold substantially all of its oil- and gas-producing property interests. Maritech’s operations consist primarily of the ongoing abandonment and decommissioning associated with its remaining offshore wells and production platforms. Maritech intends to acquire a portion of these services from the Offshore Division’s Offshore Services segment.
We continue to pursue a long-term growth strategy that includes expanding our existing core businesses, with the exception of the Maritech segment, through internal growth and acquisitions, domestically and internationally. For financial information for each of our segments, including information regarding revenues and total assets, see “Note P - Industry Segments and Geographic Information” contained in the Notes to Consolidated Financial Statements.
2015 Strategic Capital Enhancement Restructuring
Given the lower demand for certain of our products and services in the current oil and natural gas market environment, the expected levels of future consolidated operating cash flows, which we have historically used to fund our growth and liquidity needs, has become more uncertain. While remaining committed to a long-term growth strategy, our near-term focus during this period of reduced demand is to preserve and enhance liquidity through strategic operating and financial measures. In addition to cost structure rationalization and working capital management, we have focused on capital structure enhancements designed to strengthen our consolidated balance sheet. On November 20, 2015, pursuant to a Note Purchase Agreement (the “2015 Senior Note Purchase Agreement”) with GSO Tetra Holdings LP, an unrelated third party, we issued and sold $125.0 million in aggregate principal amount of our 11.0% Senior Notes due November 5, 2022 (the “Series 2015 Senior Notes”). Immediately after the closing and funding, we applied a portion of the $119.7 million net proceeds from the sale of the Series 2015 Senior Notes to repay all of the indebtedness for borrowed money outstanding under our bank revolving credit facility. In December 2015, we applied the remaining portion of the proceeds, together with other funds to (i) pay the $25.0 million purchase price pursuant to a tender offer that commenced on November 5, 2015, (the “Tender Offer”) to purchase for cash up to $25.0 million aggregate principal amount of our outstanding Series 2010-A Senior Notes and Series 2010-B Senior Notes (collectively, the “2010 Senior Notes”), (ii) prepay in full all amounts owed in respect of our outstanding Series 2006-A Senior Notes, due April 30, 2016, and (iii) pay fees and expenses associated with the transactions contemplated under the 2015 Senior Note Purchase Agreement. In addition, we entered into an agreement with Wells Fargo Energy Capital, Inc. that extends the maturity date of the $50.0 million of the Senior Secured Notes due April 1, 2017, (the "Senior Secured Notes") from 2017 to 2019. As a result of these transactions, we have repaid or extended the maturity dates of a significant portion of TETRA's total long-term debt without significantly increasing the amount of TETRA's net borrowings.
Products and Services
Fluids Division
Liquid calcium chloride, calcium bromide, zinc bromide, zinc calcium bromide, sodium bromide, and blends of such products manufactured by our Fluids Division are referred to as clear brine fluids ("CBFs") in the oil and gas industry. CBFs are salt solutions that have variable densities and are used to control bottomhole pressures during oil and gas completion and workover operations. Although they are used in many types of wells, demand for CBFs is greater in offshore well operations. The Fluids Division sells CBFs and various CBF additives to U.S. and foreign oil and gas exploration and production companies and distributes them to other companies that service customers in the oil and gas industry.
The Fluids Division provides both stock and custom-blended CBFs based on our customers’ specific needs and the proposed application. During 2015, the Fluids Division introduced a new CBF technology, TETRA CS Neptune TM completion fluids, for a niche completion fluid application for a customer's completion project in the U.S. Gulf of Mexico. We also provide a broad range of associated services, including onsite fluids filtration, handling, and recycling; wellbore cleanup; fluid engineering consultation; fluid management services; and high-volume water management services for fracturing operations. We offer to repurchase (buyback) certain used CBFs from customers, which we are able to recondition and recycle. Selling used CBFs back to us reduces the net cost of the CBFs to our customers and minimizes our customers’ need to dispose of used fluids. We recondition used CBFs through filtration, blending, and the use of proprietary chemical processes, and then market the reconditioned CBFs.
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By blending different stock CBFs and using various additives, we are able to modify the specific density, crystallization temperature, and chemical composition of the CBFs as necessary. The division’s fluid engineering personnel determine the optimal CBF blend for a customer’s particular application to maximize its effectiveness and lifespan. Our filtration services use a variety of techniques and equipment to remove particulates from CBFs at the customer’s site so that the CBFs can be reused. Filtration also enables recovery of a greater percentage of used CBFs for reconditioning.
The Fluids Division provides domestic onshore oil and gas operators with a wide variety of frac water management services, including selection, analysis, treatment, storage, transfer, recycling, and environmental risk mitigation. These services include the division’s BioRid® and other above-ground frac water treatment technologies, some of which are patented, and its proprietary TETRA STEEL TM 1200 rapid deployment water transfer system. The Fluids Division's water management personnel seek to design environmentally friendly solutions for the unique needs of each customer’s wellsite in order to maximize operational performance and efficiency.
The Fluids Division manufactures liquid and dry calcium chloride, liquid calcium bromide, zinc bromide, zinc calcium bromide, and sodium bromide for distribution, primarily into energy markets. Liquid and dry calcium chloride are also sold into water treatment, industrial, cement, food processing, road maintenance, ice melt, agricultural, and consumer products markets. Liquid sodium bromide is also sold into industrial water treatment markets, where it is used as a biocide in recirculated cooling tower waters and in other applications.
Our liquid and dry calcium chloride manufacturing facilities are located in the United States and Finland. We also acquire liquid and dry calcium chloride inventory from other producers. In the United States, we manufacture calcium chloride at five manufacturing plant facilities, the largest of which is our plant near El Dorado, Arkansas, which produces liquid and flake calcium chloride products. Liquid and flake calcium chloride are also produced at our Kokkola, Finland, plant. We operate our European calcium chloride operations under the name TETRA Chemicals Europe. We also manufacture liquid calcium chloride at our facilities in Parkersburg, West Virginia and Lake Charles, Louisiana, and we have two solar evaporation plants located in San Bernardino County, California, that produce liquid calcium chloride from underground brine reserves. All of our calcium chloride production facilities have a combined production capacity of more than 1.5 million equivalent liquid tons per year.
Our Fluids Division manufactures liquid calcium bromide, zinc bromide, zinc calcium bromide, and sodium bromide at our West Memphis, Arkansas facility. A patented and proprietary process utilized at this facility uses bromine and zinc to manufacture zinc bromide. This facility also uses proprietary processes to manufacture calcium bromide and sodium bromide and to recondition and upgrade used CBFs that we have repurchased from our customers.
See “Note P - Industry Segments and Geographic Information” in the Notes to Consolidated Financial Statements for financial information about the Fluids Division.
Production Testing Division
Our Production Testing Division provides frac flowback services, early production facilities and services, production well testing services, offshore rig cooling, and other associated services. The Production Testing Division provides well flow management and evaluation services and data that enables operators to quantify reserves, optimize production, and minimize oil and gas reservoir damage. Early production services typically include sophisticated evaluation techniques for reservoir management, including unconventional shale reservoir exploitation and optimization of well workover programs. Frac flowback and production well testing services may include well control, well cleanup, and laboratory analysis. These services are utilized in the completion process after fracking and in the production phase of oil and gas wells.
Our Production Testing Division maintains one of the largest fleets of high-pressure production testing equipment in the United States, including equipment designed to work in environments where high levels of hydrogen sulfide gas are present. The division has domestic operating locations in Colorado, Louisiana, North Dakota, Oklahoma, Pennsylvania, Texas, West Virginia, and Wyoming. The division also has locations in Argentina, Brazil, Canada, Kurdistan, Mexico, Saudi Arabia, and certain countries in Europe, Africa, and the Middle East. Production Testing operations in Canada are provided through our Greywolf Energy Services ("Greywolf") subsidiary.
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Through our Optima Solutions Holdings Limited subsidiary ("OPTIMA"), the Production Testing Division is a provider of offshore oil and gas rig cooling services and associated products that suppress heat generated by high rate flaring of hydrocarbons during offshore oil and gas well test operations.
See “Note P - Industry Segments and Geographic Information” in the Notes to Consolidated Financial Statements for financial information about the Production Testing Division.
Compression Division
Our Compression Division is a provider of compression services and equipment for natural gas and oil production, gathering, transportation, processing, and storage. The Compression Division fabricates and sells standard and custom designed compressor packages as well as oilfield fluid pump systems and provides aftermarket services and compressor package parts and components manufactured by third-party suppliers. The Compression Division provides its compression services and equipment to a broad base of natural gas and oil exploration and production, midstream, transmission, and storage companies operating throughout many of the onshore producing regions of the United States as well as in a number of foreign countries, including Mexico, Canada, and Argentina.
The Compression Division is one of the largest providers of natural gas compression services in the United States. The compression and related services business includes a service fleet of approximately 6,000 compressor packages providing in excess of 1.1 million in aggregate horsepower, utilizing a full spectrum of low-, medium-, and high-horsepower engines. Low-horsepower compressor packages enhance production for dry gas wells and liquid-loaded gas wells by deliquifying wells, lowering wellhead pressure, and increasing gas velocity. Our low-horsepower compressor packages are also utilized in connection with oil and liquids production and in vapor recovery and casing gas system applications. Low- to medium-horsepower compressor packages are typically utilized in wellhead, gathering, and other applications primarily in connection with oil and liquids production. Our high-horsepower compressor package offerings are typically utilized for natural gas production, natural gas gathering, centralized compression facilities, and midstream applications.
The horsepower of our compression services fleet on December 31, 2015, is summarized in the following table:

Range of Horsepower Per Package |  | Number of Packages |  | Aggregate Horsepower |  | % of Aggregate Horsepower
0 - 100 |  | 3,987 |  | 187,809 |  | 16.6 | %
101 - 800 |  | 1,647 |  | 459,708 |  | 40.8 | %
801 and over |  | 358 |  | 480,023 |  | 42.6 | %
Total |  | 5,992 |  | 1,127,540 |  | 100 | %

Our Compression Division's equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield fluid pump systems that are designed and fabricated primarily at its facility in Midland, Texas. Our compressor packages are typically sold to natural gas and oil exploration and production, mid-stream, transmission, and storage companies for use in various applications including gas gathering, gas lift, carbon dioxide injection, wellhead compression, gas storage, refrigeration plant, gas processing, pressure maintenance, pipeline, vapor recovery, gas transmission, fuel gas booster, and coal bed methane systems. We design and fabricate natural gas reciprocating and rotary compressor packages up to 8,000 horsepower for use in our service fleet and for sale to our broadened customer base. Our pump systems can be utilized in numerous applications including oil production, transfer, and pipelines as well as water injection and disposal.
The Compression Division's aftermarket services business provides a wide range of services to support the needs of customers who own compression equipment. These services include operations, maintenance, overhaul, and reconfiguration services, which may be provided under turnkey engineering, procurement, and construction contracts. This business employs factory trained sales and support personnel in most of the major oil and natural gas producing basins in the United States to perform these services.
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Virtually all of our Compression Division's operations are conducted through our partially owned CSI Compressco LP subsidiary ("CCLP"). Through our wholly owned subsidiary, CSI Compressco GP Inc., we manage and control CCLP, and accordingly, we consolidate CCLP results of operation in our consolidated results of operation. As of December 31, 2015, common units held by the public represent approximately a 56% ownership interest in CCLP.
See “Note P - Industry Segments and Geographic Information” in the Notes to Consolidated Financial Statements for financial information about the Compression Division.
Offshore Division
Our Offshore Division consists of two operating segments: Offshore Services and Maritech.
Offshore Services Segment. The Offshore Services segment provides: (1) downhole and subsea services such as well plugging and abandonment, and workover services; (2) decommissioning and certain construction services utilizing heavy lift barges and various cutting technologies with regard to offshore oil and gas production platforms and pipelines; and (3) conventional and saturation diving services. We provide these services to offshore oil and gas operators, primarily in the U.S. Gulf of Mexico. We offer comprehensive, integrated services, including individualized engineering consultation and project management services.
In providing services, our Offshore Services segment utilizes rigless offshore plugging and abandonment equipment packages, two heavy lift barges, several dive support vessels, and other dive support assets that we own. In addition, we lease other assets from third parties and engage third-party contractors whenever necessary. The Offshore Services segment provides a wide variety of conventional and saturation diving services to its customers through its Epic Diving & Marine Services subsidiary ("EPIC"). Well abandonment, decommissioning, diving, and certain construction services are performed primarily in the U.S. Gulf of Mexico. The Offshore Services segment provides offshore cutting services and tool rentals through its EOT Cutting Services ("EOT") subsidiary. The Offshore Services segment also utilizes specialized equipment and engineering expertise to address a variety of specific platform construction and decommissioning issues, including those associated with platforms that have been toppled or severely damaged by hurricanes and other windstorms. The Offshore Services segment provides services to major oil and gas companies and independent operators, including Maritech, through its facilities located in Broussard, Belle Chasse, Fourchon, and Houma, Louisiana.
Our Offshore Services segment’s fleet of service vessels has expanded and contracted in size in recent years in response to changing demands for its services. With the TETRA Hedron, a 1,600-metric-ton heavy lift derrick barge, and the TETRA Arapaho, a 725-metric-ton heavy lift derrick barge, we perform heavy lift decommissioning and construction projects and integrated operations on oil and gas production platforms. The Offshore Services segment also performs contract diving operations, utilizing its owned dive service vessels, as well as vessels obtained under long- and short-term leases as needed. Diving services include saturation diving for up to 1,000 foot dive depths as well as mixed gas and surface diving for shallower dives.
Among other factors, demand for our Offshore Service segment’s operations in the U.S. Gulf of Mexico is affected by federal regulations governing the abandonment and decommissioning of offshore wells, production platforms, and pipelines. These regulations include Notice To Lessees 2010-G05: “Decommissioning Guidance for Wells and Platforms” (NTL 2010-G05, known as the “Idle Iron Guidance”). The Bureau of Safety and Environmental Enforcement ("BSEE") issues offshore permits, regulates offshore contractors, and oversees the provisions of the Idle Iron Guidance. The Idle Iron Guidance became effective October 15, 2010, and requires that operators perform and report decommissioning and abandonment plans and activities in accordance with BSEE requirements. The Idle Iron Guidance provides specific guidelines for when an operator has to permanently plug and abandon wells and decommission platforms and related facilities after the occurrence of certain events, including the end of useful operations, cessation of commercial production, and expiration of the lease.
Maritech Segment. The Maritech segment is a limited oil and gas production operation in the offshore U.S. Gulf of Mexico. During 2011 and the first quarter of 2012, Maritech sold substantially all of its proved reserves. Maritech’s remaining operations consist primarily of the ongoing abandonment and decommissioning of its remaining offshore wells, facilities, and production platforms. Maritech intends to acquire a significant portion of these services with regard to such assets that it operates from the Offshore Division’s Offshore Services segment.
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The sales of substantially all of Maritech’s oil and gas producing properties during 2011 and 2012 have essentially removed us from the oil and gas exploration and production business, and significantly all of Maritech’s oil and gas acquisition, development, and exploitation activities have ceased. Following these sales, Maritech’s remaining oil and gas reserves and production are negligible. Maritech’s operations consist primarily of the well abandonment and decommissioning of its remaining offshore oil and gas platforms and facilities. During the three year period ended December 31, 2015, Maritech spent approximately $187.7 million on such efforts. Approximately $48.4 million of Maritech decommissioning liabilities remain as of December 31, 2015, and approximately $14.6 million of this amount is planned to be performed during 2016, with the timing of a portion of this work being discretionary.
Maritech’s decommissioning liabilities are established based on what it estimates a third party would charge to plug and abandon the wells, decommission the pipelines and platforms, and clear the sites associated with its properties. We review the adequacy of Maritech’s decommissioning liabilities whenever indicators suggest that the estimated cash flows underlying the liabilities have changed materially. The timing and amounts of these cash flows are subject to changes in the energy industry environment and may result in additional liabilities being recorded. For a further discussion of Maritech’s adjustments to its decommissioning liabilities, see “Note H - Decommissioning and Other Asset Retirement Obligations” in the Notes to Consolidated Financial Statements.
See “Note P - Industry Segments and Geographic Information” in the Notes to Consolidated Financial Statements for financial information about the Offshore Division.
Sources of Raw Materials
Our Fluids Division manufactures calcium chloride, calcium bromide, zinc bromide, zinc calcium bromide, and sodium bromide for sale to its customers. The Fluids Division also recycles used calcium bromide and zinc bromide CBFs repurchased from its oil and gas customers.
The Fluids Division manufactures liquid calcium chloride, either from underground brine reserves or by reacting hydrochloric acid with limestone. The Fluids Division also purchases liquid and dry calcium chloride from a number of U.S. and foreign chemical manufacturers. Our El Dorado, Arkansas, plant produces liquid and flake calcium chloride, utilizing underground brine (tail brine) obtained from Chemtura Corporation ("Chemtura") that contains calcium chloride. We also produce calcium chloride at our two plants in San Bernardino County, California, by solar evaporation of pumped underground brine reserves that contain calcium chloride. The underground reserves of this brine are deemed adequate to supply our foreseeable need for calcium chloride at those plants.
The Fluids Division's primary sources of hydrochloric acid are co-product streams obtained from chemical manufacturers. Substantial quantities of limestone are also consumed when converting hydrochloric acid into calcium chloride. Currently, hydrochloric acid and limestone are generally available from multiple sources.
To produce calcium bromide, zinc bromide, zinc calcium bromide, and sodium bromide at our West Memphis, Arkansas, facility, we use bromine, hydrobromic acid, zinc, and lime as raw materials. There are multiple sources of zinc that we can use in the production of zinc bromide and zinc calcium bromide. We have a long-term supply agreement with Chemtura, under which the Fluids Division purchases its requirements of raw material bromine from Chemtura’s Arkansas bromine facilities. In addition, we have a long-term agreement with Chemtura under which Chemtura supplies the Fluids’ El Dorado, Arkansas, calcium chloride plant with raw material tail brine from its Arkansas bromine production facilities.
We also own a calcium bromide manufacturing plant near Magnolia, Arkansas, that was constructed in 1985. This plant was acquired in 1988 and is not operable. We currently lease approximately 33,000 gross acres of bromine-containing brine reserves in the vicinity of this plant. While this plant is designed to produce calcium bromide, it could be modified to produce elemental bromine or select bromine compounds. Development of the brine field, construction of necessary pipelines, and reconfiguration of the plant would require a substantial capital investment. The long-term Chemtura bromine supply agreement discussed above provides us with a secure supply of bromine to support the division’s current operations. We do, however, continue to evaluate our strategy related to the Magnolia, Arkansas, assets and their future development. Chemtura has certain rights to participate in future development of the Magnolia, Arkansas assets.
The Fluids and Production Testing Divisions purchase their water management, production testing, and rig cooling equipment and components from third-party manufacturers. CCLP designs and fabricates its reciprocating
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and rotary screw compressor packages and pumps with components obtained from third party suppliers. These components represent a significant portion of the cost of the compressor packages and pump systems. Some of the components used in the assembly of compressor packages, well monitoring, sand separation, production testing, and rig cooling equipment are obtained from a single supplier or a limited group of suppliers. We do not have long-term contracts with these suppliers or manufacturers. Should we experience unavailability of the components we use to assemble our equipment, we believe that there are adequate alternative suppliers and that any impact to us would not be severe. CCLP occasionally experiences long-lead times for components from suppliers and, therefore, may at times make purchases in anticipation of future orders.
Market Overview and Competition
Our operations are significantly dependent upon the demand for, and production of, natural gas and oil in the various domestic and international locations in which we operate. Beginning in 2014 and continuing throughout 2015, the prices of natural gas and oil have dropped significantly. As a result, drilling activities and capital expenditure levels have declined in the domestic and international markets in which we operate. The decline in activity in the natural gas and oil exploration and production industry has resulted, and is expected to continue to result, in a decline in demand for certain of our products and services.
Fluids Division
Our Fluids Division provides its products and services to oil and gas exploration and production companies in the United States and certain foreign markets. Current areas of market presence include the onshore U.S., the U.S. Gulf of Mexico, the North Sea, Mexico, and certain countries in South America, Europe, Asia, the Middle East, and Africa. Customers with deepwater operations frequently utilize high volumes of CBFs, which can be subject to harsh downhole conditions, such as high pressure and high temperatures. Demand for CBF products offshore is generally driven by completion activity.
During 2013 and 2014, a portion of the growth of the Fluids Division's U.S. operations has been due to increased industry demand for onshore water management services in unconventional shale gas and oil reservoirs. However, beginning in 2015, demand for certain Fluids Division products and services, particularly water management services, has been adversely affected by declining oil and natural gas pricing. The Fluids Division provides water management services to a wide-range of onshore oil and gas operators located in the most significant domestic shale gas and oil reservoirs, including the Bakken, Barnett, Cana Woodford, Eagle Ford, Fayetteville, Granite Wash, Haynesville, Marcellus, and Utica.
Our Fluids Division’s principal competitors in the sale of CBFs to the oil and gas industry are Baker Hughes, Baroid, a subsidiary of Halliburton, and M-I Swaco, a subsidiary of Schlumberger. This market is highly competitive, and competition is based primarily on service, availability, and price. Major customers of the Fluids Division include Al Ghaith, Anadarko, BHP Billiton, Chesapeake, Devon, ENI Petroleum, ExxonMobil, LLOG Exploration, Saudi ARAMCO, Shell, Southwestern Energy, Tullow, TOTAL, and Whistler Energy. The Fluids Division also sells its CBF products through various distributors. Competitors for the division’s water management services include large, multinational providers as well as small, privately owned operators.
Our liquid and dry calcium chloride products have a wide range of uses outside the energy industry. Non-energy market segments where these products are used include water treatment, industrial, food processing, road maintenance, ice melt, agricultural, and consumer products. We also sell sodium bromide into industrial water treatment markets as a biocide under the BioRid® tradename. Most of these markets are highly competitive. The Fluids Division’s European calcium chloride operations market our calcium chloride products to certain European markets. Our principal competitors in the non-energy related calcium chloride markets include Occidental Chemical Corporation and Vitro in North America, and NedMag in Europe.
Production Testing Division
In certain gas producing basins, water, sand, and other abrasive materials commonly accompany the initial production of natural gas, often under high pressure and high temperature conditions and, in some cases, from reservoirs containing high levels of hydrogen sulfide gas. The division provides the specialized equipment and qualified personnel to address these impediments to production. The Production Testing Division also provides certain services designed to accommodate the unique frac flowback and testing demands of shale gas reservoirs. Through Greywolf, the division serves the western Canada market. In addition, the Production Testing Division
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continues to serve the continuing demand for services associated with many of the domestic shale gas reservoirs, including the Bakken, Barnett, Cana Woodford, Eagle Ford, Fayetteville, Haynesville, Marcellus, and Niobrara. In addition, through our OPTIMA subsidiary, the Production Testing Division offers offshore oil and gas rig cooling services and associated products that suppress heat generated by high-rate flaring of hydrocarbons during offshore well testing operations. OPTIMA primarily serves markets in the North Sea, Asia-Pacific, the Middle East, and South America.
The U.S. and Canadian production testing markets are highly competitive, and competition is based on availability of appropriate equipment and qualified personnel, as well as price, quality of service, and safety record. We believe that our skilled personnel, operating procedures, and safety record give us a competitive advantage in the marketplace. The Production Testing Division plans to continue growing its foreign operations in order to serve major oil and gas markets worldwide, both organically and through additional strategic acquisitions. Competition in onshore U.S. production testing markets is primarily dominated by numerous small, privately owned operators. Expro International, Halliburton, Schlumberger, and Weatherford are major competitors in the foreign markets we serve. The major customers for this division include Apache, Cabot, Carrizo Oil and Gas, Chevron, COG Operating, ConocoPhillips, Consol Energy, Devon, Eclipse Resources, Encana, EOG Resources, EP Energy, Halliburton, HESS, Peak Energy, Peyto, Rice Energy, Saudi Aramco, Schlumberger, Shell, and TAQ Operating Company.
Compression Division
The Compression Division provides its products and services to a broad base of natural gas and oil exploration and production, midstream, pipeline transmission, and storage companies, operating throughout many of the onshore producing regions of the United States. The Compression Division also has operations in Latin America and other foreign regions. While most of the Compression Division's services are performed throughout Texas, the San Juan Basin, the Rocky Mountain region, and the Midcontinent region of the United States, we also have a presence in other U.S. producing regions. The Compression Division continues to seek opportunities to further expand its operations into other regions in the U.S. and elsewhere in the world.
The division’s strategy is to compete on the basis of superior services at a competitive price. The Compression Division believes that it is competitive because of the significant increases in the value that results from the use of its services, its superior customer service, its highly trained field personnel, and the quality of the compressor packages it uses to provide services. The Compression Division’s major customers include Atlas Pipeline Mid-Continent, BP America Production Company, Cimarex Energy, ConocoPhillips, DCP Midstream, and Noble Energy.
The compression services and compressor package fabrication business is highly competitive. The Compression Division experiences competition from companies that may be able to more quickly adapt to changes within our industry and changes in economic conditions as a whole, more readily take advantage of available opportunities, and adopt more aggressive pricing policies. Primary competition for our low-horsepower compression services business comes from various local and regional companies that utilize packages consisting of a screw compressor with a separate engine driver or a reciprocating compressor with a separate engine driver. These local and regional competitors tend to compete with us on the basis of price as opposed to our focus on providing production enhancement value to the customer. Competition for the mid- and high-horsepower compression services business comes primarily from large national and multinational companies who may have greater financial resources than ours. Such competitors include ArchRock (formerly a part of Exterran), AXIP Energy Services, CDM Resource Management, Exterran, J-W Power, and USA Compression. Our competition in the standard compressor package fabrication and sales market includes several large companies and a large number of small, regional fabricators, including some of those who we compete with for compression services, as well as AG Equipment Company, SEC Energy Products & Services, Enerflex, and others. The Compression Division's competition in the custom-designed market usually consists of larger companies with the ability to provide integrated projects and product support after the sale, including some of the competitors noted above. The ability to fabricate these large custom-designed packages at the Compression Division's facilities near the point of end-use of many customers is often a competitive advantage.
Offshore Division
Offshore Services Segment. Demand for the Offshore Services segment’s offshore well abandonment and decommissioning services in the Gulf of Mexico is primarily driven by the maturity and decline of producing fields, aging offshore platform infrastructure, damage to platforms and pipelines from hurricanes and other windstorms,
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and government regulations, among other factors. Demand for the Offshore Services segment’s construction and other services is driven by the general level of offshore activity of its customers, which is affected by oil and natural gas prices and government regulation. We believe that the enforcement of government regulations, including the Idle Iron Guidance, may accelerate the pace at which offshore Gulf of Mexico abandonment and decommissioning will be done in the future.
Offshore activities in the Gulf of Mexico are seasonal, with the majority of work occurring during the months of April through October when weather conditions are most favorable. Critical factors required to compete in this market include, among other factors: (i) the proper equipment, including vessels and heavy lift barges; (ii) qualified, experienced personnel; (iii) technical expertise to address varying downhole, surface, and subsea conditions, particularly those related to damaged wells and platforms; and (iv) a comprehensive health, safety, and environmental program. Our Offshore Services segment's fleet of owned equipment includes two heavy lift derrick barges, the TETRA Hedron, which has a 1,600-metric-ton lift capacity, fully revolving crane, and the TETRA Arapaho, which has a 725-metric-ton lift capacity. We believe that the integrated services that we offer and our vessel and equipment fleets satisfy current market requirements in the Gulf of Mexico and allow us to successfully compete in that market.
The Offshore Services segment markets its services primarily to major oil and gas companies and independent operators. One of the Offshore Services segment’s most significant customer during the past three years has been Maritech; however, the amount of work performed for Maritech has been reduced and the amount of work to be performed in the future for Maritech is expected to continue to decline. Other major customers include Chevron, Fieldwood Energy, Shell, Stone Energy, and W&T Offshore. The Offshore Services segment’s services are performed primarily in the U.S. Gulf of Mexico, however, the segment is also seeking to expand its operations to international markets. Our principal competitors in the U.S. Gulf of Mexico market are Bisso, Express Energy, Harkand, Oceaneering, Offshore Specialty Fabricators, Inc., and Superior Energy Services, Inc. This market is highly competitive, and competition is based primarily on service, equipment availability, safety record, and price.
Other Business Matters
Marketing and Distribution
The Fluids Division markets its CBF products through its distribution facilities located in the U.S. Gulf Coast region, the North Sea region of Europe, and certain other foreign markets, including Brazil, West Africa, and the Middle East.
Non-oilfield calcium chloride products are also marketed through the Fluids Division’ sales offices in California, Missouri, Pennsylvania, and Texas, as well as through a network of distributors in the United States and northern and central Europe. In addition to production facilities in the United States and Finland, the division has distribution facilities strategically located to provide efficient product distribution.
No single customer provided 10% or more of our total consolidated revenues during the year ended December 31, 2015.
Backlog
The Compression Division’s equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield fluid pump systems that are fabricated to customer specifications and standard specifications, as applicable. The Division's custom designed compressor packages are typically greater in size and scope than standard fabrication packages, requiring more labor, materials, and overhead resources. The fabrication and sales business requires diligent planning of those resources and project and backlog management in order to meet the customer's desired delivery dates and performance criteria, and achieve fabrication efficiencies. As of December 31, 2015, the Compression Division's fabrication and sales backlog was approximately $33.6 million, all of which is expected to be recognized through the year ended December 31, 2016. This fabrication and sales backlog consists of firm customer orders for which a purchase or work order has been received, satisfactory credit or financing arrangements exist, and delivery has been scheduled. Our fabrication and sales backlog is a measure of marketing effectiveness that allows us to plan future labor and raw material needs and to measure our success in winning bids from our customers. Excluding these Compression Division operations, our products and services either are not sold under long-term contracts or do not require long lead times to procure or deliver.
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Employees
As of December 31, 2015, we had approximately 3,000 employees. None of our U.S. employees are presently covered by a collective bargaining agreement. Our foreign employees are generally members of labor unions and associations in the countries in which we operate. We believe that our relations with our employees are good.
Patents, Proprietary Technology and Trademarks
As of December 31, 2015, we owned or licensed forty-four (44) issued U.S. patents and had twenty (20) patent applications pending in the United States. We also had forty-one (41) owned or licensed foreign patents and thirty-two (32) foreign patent applications pending in various other countries. The foreign patents and patent applications are primarily foreign counterparts to U.S. patents or patent applications. The issued patents expire at various times through 2032. We have elected to maintain certain other internally developed technologies, know-how, and inventions as trade secrets. While we believe that our patents and trade secrets are important to our competitive positions in our businesses, we do not believe any one patent or trade secret is essential to our success.
It is our practice to enter into confidentiality agreements with key employees, consultants, and third parties to whom we disclose our confidential and proprietary information, and we have typical policies and procedures designed to maintain the confidentiality of such information. There can be no assurance, however, that these measures will prevent the unauthorized disclosure or use of our trade secrets and expertise, or that others may not independently develop similar trade secrets or expertise.
We sell various products and services under a variety of trademarks and service marks, some of which are registered in the United States or other countries.
Health, Safety, and Environmental Affairs Regulations
We believe that our service and sales operations and manufacturing plants are in substantial compliance with all applicable U.S. and foreign health, safety, and environmental laws and regulations. We are committed to conducting all of our operations under the highest standards of safety and respect for the environment. However, risks of substantial costs and liabilities are inherent in certain of our operations and in the development and handling of certain products and equipment produced or used at our plants, well locations, and worksites. Because of these risks, there can be no assurance that significant costs and liabilities will not be incurred in the future. Changes in environmental and health and safety regulations could subject us to more rigorous standards. We cannot predict the extent to which our operations may be affected by future regulatory and enforcement policies.
We are subject to various federal, state, local, and foreign laws and regulations relating to health, safety, and the environment, including regulations regarding air emissions, wastewater and storm water discharges, and the disposal of certain hazardous and nonhazardous wastes. Compliance with laws and regulations may expose us to significant costs and liabilities, and cause us to incur significant capital expenditures in our operations. Failure to comply with these laws and regulations or associated permits may result in the assessment of fines and penalties and the imposition of other obligations.
Our operations in the United States are subject to various evolving environmental laws and regulations that are enforced by the U.S. Environmental Protection Agency ("EPA"); the BSEE of the U.S. Department of the Interior; the U.S. Coast Guard; and various other federal, state, and local environmental authorities. Similar laws and regulations, designed to protect the health and safety of our employees and visitors to our facilities, are enforced by the U.S. Occupational Safety and Health Administration, and other state and local agencies and authorities. Specific environmental laws and regulations applicable to our operations include: (i) the Federal Water Pollution Control Act of 1972; (ii) the Resource Conservation and Recovery Act of 1976; (iii) the Clean Air Act of 1977; (iv) the Comprehensive Environmental Response, Compensation and Liability Act of 1980 ("CERCLA"); (v) the Superfund Amendments and Reauthorization Act of 1986; (vi) the Federal Insecticide, Fungicide, and Rodenticide Act of 1947; (vii) the Toxic Substances Control Act of 1976; (viii) the Hazardous Materials Transportation Act of 1975; (ix) and the Pollution Prevention Act of 1990. Our operations outside the United States are subject to various foreign governmental laws and regulations relating to the environment, health and safety, and other regulated activities in the countries in which we operate.
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The EPA has determined that greenhouse gases present an endangerment to public health and the environment, because, according to the EPA, they contribute to global warming and climate change. As a result, the EPA has begun to regulate certain sources of greenhouse gases, including air emissions associated with oil and gas production, particularly as they relate to the hydraulic fracturing of natural gas wells. In addition, the EPA has issued regulations requiring the reporting of greenhouse gas emissions from certain sources which include onshore and offshore oil and natural gas production facilities and onshore oil and gas processing, transmission, storage, and distribution facilities. Reporting of greenhouse gas emissions from such facilities is required on an annual basis. The EPA’s rules relating to emissions of greenhouse gases from large, stationary sources of emissions are currently subject to a number of legal challenges, but the federal courts have thus far declined to issue any injunctions to prevent the EPA or state environmental agencies from implementing the rules. Further, Congress has considered, and almost one-half of the states have adopted, legislation that seeks to control or reduce emissions of greenhouse gases from a wide-range of sources.
Offshore Operations
During the past four years, several Notices to Lessees ("NTLs"), Safety and Environmental Management Systems ("SEMS") regulations, and other safety regulations implementing additional safety and certification requirements applicable to offshore activities in the Gulf of Mexico were issued. These NTLs and SEMS regulations include requirements by operators to:

• | submit well blowout prevention measures and contingency plans, including demonstrating access to subsea blowout containment resources;

• | abide by new permitting standards requiring detailed, independently certified descriptions of well design, casing, and cementing;

• | follow new performance-based standards for offshore drilling and production operations

• | enhance the safety of operations by reducing the frequency and severity of accidents; and

• | certify that the operator has complied with all regulations.

The “Idle Iron Guidance” regulations, which were adopted in 2010 and govern the plugging, abandonment, and decommissioning of U.S. Gulf of Mexico offshore wells and production platforms, are overseen by BSEE. This agency's scope of responsibility includes maintaining an investigation and review unit, providing for public forums, conducting comprehensive environmental analyses, and creating implementation teams to analyze various aspects of the regulatory structure and to help implement the reform agenda.
We maintain various types of insurance intended to reimburse certain costs in the event of an explosion or similar event involving our offshore operations. Our insurance program is reviewed not less than annually with our insurance brokers and underwriters. As part of our insurance program for offshore operations, we maintain general liability and protection and indemnity policies that provide third-party liability coverage, up to applicable policy limits, for risks of an accidental nature, including but not limited to death and personal injury, collision, damage to fixed and floating objects, pollution, and wreck removal. We also maintain a vessel pollution liability policy that provides coverage for oil or hazardous substance pollution emanating from a vessel, addressing both Oil Pollution Act of 1990 ("OPA") and CERCLA obligations. This policy also provides coverage for cost of defense, fines, and penalties.
We provide services and products to customers in the Gulf of Mexico, generally pursuant to written master services agreements that create insurance and indemnity obligations for both parties. If there was an explosion or similar catastrophic event on an offshore location where we are providing services and products, under the majority of our master services agreements with our customers:

(1) | We would be required to indemnify our customer for any claims for injury, death, or property loss or destruction made against them by us or our subcontractors or our subcontractor’s employees. The customer would be required to indemnify us for any claims for injury, death, or property loss or destruction made against us by the customer or its other subcontractors or the employees of the customer or its other subcontractors. These indemnities are intended to apply regardless of the cause of such claims, including but not limited to, the negligence of the indemnified party. Our insurance is structured to cover the cost of defense and any resulting liability from all indemnified claims, up to policy limits.

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(2) | The customer would be required to indemnify us for all claims for injury, death, or property loss or destruction made against us by a third party that arise out of the catastrophic event, regardless of the cause of such claims, including but not limited to, our negligence or our subcontractors’ negligence. Our insurance is structured to cover the cost of defense and any resulting liability from all such claims; however, our insurance would be applicable to the claim only if the customer defaulted or otherwise breached its indemnity obligations to us.

(3) | The customer would be required to indemnify us for all claims made against us for environmental pollution or contamination that arise out of the catastrophic event, regardless of the cause of such claims, including our negligence or the negligence of our subcontractors. Our insurance is structured to cover the cost of defense and any resulting liability from all such claims; however, our insurance would be applicable to the claim only if the customer defaulted or otherwise breached its indemnity obligations to us.

Following the 2011 and 2012 sales of substantially all of Maritech’s offshore producing properties, we no longer participate in offshore drilling activities. However, Maritech and our Offshore Services segment engage contractors to provide well abandonment and related services and products on Maritech’s remaining offshore oil and gas production platforms and associated wells, generally pursuant to written master services agreements that create insurance and indemnity obligations for both parties. If there was an environmental event on an offshore Maritech location where a Maritech contractor was providing services and products, under a majority of Maritech’s master services agreements with its contractors, Maritech would be required to indemnify its contractor for any claims against the contractor for injury, death, or property loss or destruction brought by Maritech, its other subcontractors, or its or their respective employees. The contractor would be required to indemnify Maritech for any claims for injury, death, or property loss or destruction made against Maritech by the contractor or its subcontractors or the employees of the contractor or its subcontractors. These indemnities would apply regardless of the cause of such claims, including the negligence of the indemnified party. Maritech’s insurance is structured to cover the cost of defense and any resulting liability from all indemnified claims, up to policy limits.
In accordance with applicable regulations, Maritech maintains an oil spill response plan with the BSEE and has designated contractors who are trained as qualified individuals and are prepared to coordinate a response to any spill or leak. Maritech also has contracts in place to assure that a complete and experienced resource team is available as required.
Item 1A. Risk Factors.
Certain Business Risks
Although it is not possible to identify all of the risks we encounter, we have identified the following significant risk factors that could affect our actual results and cause actual results to differ materially from any such results that might be projected, forecasted, or estimated by us in this report.
Market Risks
The demand and prices for our products and services are affected by several factors, including the supply, demand, and prices for oil and natural gas.
Demand for our products and services is materially dependent on the supply, demand, and prices for oil, natural gas, and competing energy sources, and is more specifically dependent on the supply, demand, and prices for the products and services we offer, both in the United States and in the foreign countries in which we operate. These factors are also influenced by the U.S., foreign, and regional economic, financial, business, political, and social conditions within the markets we serve. Oil and gas prices and, therefore, the levels of well drilling, completion, workover, and production activities, tend to fluctuate and have declined significantly since 2014. Worldwide economic and political events, including initiatives by the Organization of Petroleum Exporting Countries and increasing or decreasing demand in other large world economies as well as tremendous growth in natural gas supplies in the U.S. from shale reserves, have contributed to, and are likely to continue to contribute to, price volatility. The expansion of alternative energy supplies that compete with oil and gas, improvements in energy conservation, and improvements in the energy efficiency of vehicles, plants, equipment, and devices will also reduce oil and gas consumption or slow its growth.
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Crude oil prices have significantly declined since 2014. Although crude oil prices were volatile in 2015, with West Texas Intermediate oil prices ranging from a high of $59.80 per barrel in June 2015 to a low of $37.24 per barrel in December 2015, prices have steadily declined from a high of $107.50 in June 2014. U.S. natural gas prices also decreased in 2015, with Henry Hub prices ranging from a high of $2.97 per million British thermal units (“MMBtu”) in January 2015 to a low of $1.92 per MMBtu in December 2015, down from a high of $6.49 per MMBtu in February 2014. Oil and gas prices have declined further during early 2016. Low oil and natural gas prices have negatively affected the operating cash flows and exploration and development activities and plans of many of our customers and have had, and are expected to continue to have, a negative impact on the demand for many of our products and services.
If economic conditions or energy prices remain depressed or further deteriorate, there are likely to be additional constraints on oil and gas industry spending levels. Reduced spending levels would negatively impact the demand for many of our products and services and the prices we charge for these products and services, which would negatively affect our revenues and future growth.
During this current period of low oil and natural gas prices, many of our customers are experiencing a downturn in their financial condition. Current economic conditions may also lead to additional constraints on the operating cash flows of our customers, potentially impacting their ability to pay us in a timely manner, which could result in increased customer bankruptcies and uncollectible receivables.
We encounter, and expect to continue to encounter, intense competition in the sale of our products and services.
We compete with numerous companies in each of our operating segments, many of which have substantially greater financial and other resources than we have. Certain of our competitors have lower standards of quality and older equipment and safety, and offer services at lower prices than we do. Other competitors have newer equipment that is better suited to our customers' needs. Particularly during the current period of low oil and natural gas pricing, to the extent competitors offer products or services at lower prices or higher quality, or more cost-effective products or services, our business could be materially and adversely affected. In addition, certain of our customers may elect to perform services internally in lieu of using our services, which could also materially and adversely affect our operations.
The profitability of our operations is dependent on other numerous factors beyond our control.
Our operating results in general, and gross profit in particular, are determined by market conditions and the products and services we sell in any period. Other factors, such as heightened competition, changes in sales and distribution channels, availability of skilled labor and contract services, shortages in raw materials, or inability to obtain supplies at reasonable prices, may also affect the cost of sales and the fluctuation of gross margin in future periods.
Other factors affecting our operating results and activity levels include oil and natural gas industry spending levels for exploration and production, development, and acquisition activities, impairments of long-lived assets, and plugging, abandonment, and decommissioning costs on Maritech’s remaining offshore production platforms, wells, and pipelines. Several of our customers have reduced their capital expenditures in 2015 and have publicly announced further reductions in their capital expenditure plans for 2016 in light of the significant declines in the prices of oil and natural gas, and such reductions have had, and are expected to continue to have, a negative effect on the demand for many of our products and services. This has had, and is expected to continue to have, a negative effect on our revenues and results of operations. A large concentration of our operating activities is located in the onshore and offshore U.S. Gulf Coast region. Our revenues and profitability are particularly dependent upon oil and natural gas industry activity and spending levels in this region. Our operations may also be affected by technological advances, cost of capital, and tax policies. Adverse changes in any of these other factors may have a material adverse effect on our revenues and profitability.
Changes in the economic environment have resulted, and could further result, in further significant impairments of certain of our long-lived assets and goodwill.
During the fourth quarter of 2015, primarily as a result of the significant decreases in oil and natural gas prices, we recorded certain consolidated long-lived asset impairments (excluding goodwill impairments) of approximately $44.2 million. During the two year period ending December 31, 2015, we have recorded a total of
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$79.0 million of long-lived asset impairments. A continuation of the depressed commodity prices and/or further changes in the economic environment could result in a greater decrease in the demand for many of our products and services, which could impact the expected utilization rates of certain of our long-lived assets, including plant facilities, operating locations, barges and vessels, and other operating equipment. Under generally accepted accounting principles, we review the carrying value of our long-lived assets when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable, based on their expected future cash flows. The impact of reduced expected future cash flow could require the write-down of all or a portion of the carrying value for these assets, which would result in additional impairments, resulting in decreased earnings.
Due to decreases in our stock price and CCLP's common unit price and the expected future cash flows from certain of our reporting units, we recorded approximately $177.0 million of goodwill impairments during the fourth quarter of 2015. During the two year period ending December 31, 2015, we have recorded a total of approximately $241.3 million of goodwill impairments. Under generally accepted accounting principles, we review the carrying value of our goodwill for possible impairment annually or when events or changes in circumstances indicate the carrying value may not be recoverable. Changes in circumstances indicating the carrying value of our goodwill may not be recoverable include a decline in our stock price or the price of CCLP's common units, or future cash flows and slower growth rates in our industry. If economic and market conditions decline further, we may be required to record additional charges to earnings during the period in which any impairment of our goodwill is determined, resulting in a negative impact on our results of operations. Subsequent to December 31, 2015, and as of March 3, 2016, the prices of our common stock and the common units of CCLP have continued to decline, and as a result future additional impairments are possible.
The demand for our products and services in the U.S. Gulf of Mexico could continue to be adversely impacted by increased regulation and continuing regulatory uncertainty.
Operations in the U.S. Gulf of Mexico have been subject to an increasingly stringent regulatory environment including government regulations focused on offshore operating requirements, spill cleanup, and enforcement matters. These regulations also implement additional safety and certification requirements applicable to offshore activities in the U.S. Gulf of Mexico. Demand for our products and services in the U.S. Gulf of Mexico continues to be affected by these regulations. Future regulatory requirements could delay our customers’ activities, reduce our revenues, and increase our operating costs, including the cost to insure offshore operations, resulting in reduced cash flows and profitability.
We are dependent on third-party suppliers for specific products and equipment necessary to provide certain of our products and services.
We sell a variety of clear brine fluids to the oil and gas industry and non-energy markets, including calcium chloride, calcium bromide, zinc bromide, zinc calcium bromide, sodium bromide, and formate-based brines, some of which we manufacture and some of which are purchased from third parties. Sales of these compound products contribute significantly to our revenues. In our manufacture of calcium chloride, we use brines, hydrochloric acid, and other raw materials purchased from third parties. In our manufacture of bromide compound products, we use elemental bromine, hydrobromic acid, and other raw materials which are purchased from third parties. We rely on Chemtura Corporation as a supplier of raw materials for our bromide compound products as well as for our El Dorado, Arkansas, calcium chloride plant. Although we have long-term supply agreements with Chemtura, if we were unable to acquire these raw materials at reasonable prices for a prolonged period, our business could be materially and adversely affected.
Some of the well plugging, abandonment, and decommissioning services performed by our Offshore Services segment require the use of vessels, diving, cutting, and other equipment and services provided by third parties. We lease equipment and obtain services from certain providers, and there can be no assurance that this equipment and these services will be available at reasonable prices in the future.
The fabrication of our compression packages, pump systems, and production testing, well monitoring, and rig cooling equipment requires the purchase of many types of components, some of which we obtain from a single source or a limited group of suppliers. Our reliance on these suppliers exposes us to the risk of price increases, inferior component quality, or an inability to obtain an adequate supply of required components in a timely manner. The profitability or future growth of our Compression and Production Testing Divisions may be adversely affected due to our dependence on these key suppliers.
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Our success depends upon the continued contributions of our personnel, many of whom would be difficult to replace, and the continued ability to attract new employees.
Our success depends on our ability to attract, train, and retain skilled management and employees at reasonable compensation levels. The delivery of our products and services requires personnel with specialized skills and experience. In addition, our ability to expand our operations depends in part on our ability to increase the size of our skilled labor force. The demand for skilled managers and workers in the U.S. Gulf Coast region and other regions in which we operate is high and the supply is limited. A lack of qualified personnel, could adversely affect operating results.
Operating, Technological, and Strategic Risks
We may not fully realize the benefits from the CSI Acquisition.
As a result of the significant decline in oil and gas prices since the CSI Acquisition, we do not expect to realize all of the anticipated benefits from the CSI Acquisition. In addition, a portion of the expected benefits may not be realized if we are unable to fully and efficiently integrate the business and operations of CSI. While significant steps to integrate and consolidate operations functions have been accomplished, the integration of certain administrative functions has yet to be completed. We are currently reviewing the steps necessary to convert and consolidate CSI's financial accounting, operating, and information systems environment into our system environment. There can be no assurances that these system integration efforts will accomplish all the targeted efficiencies, or that they will not be more costly or take longer to accomplish than what we currently estimate.
We performed an inspection of the assets to be acquired, which we believe to be generally consistent with industry practices. However, the accuracy of our assessments of the assets and our estimates are inherently uncertain. There could also be environmental or other problems that are not necessarily observable even when the inspection is undertaken. If problems are identified after closing of the CSI Acquisition, the stock purchase agreement provides for limited recourse against the seller. In addition, our estimate of the required working capital for the CSI business and targeted working capital set forth in the stock purchase agreement may not be sufficient for actual working capital needs of the CSI business. If our estimate and the targeted working capital were lower than the actual needs of the acquired business, the Compression Division may be required to fund such additional working capital needs out of its operating cash flows or borrowings under the CCLP Credit Agreement.
The CSI Acquisition has substantially expanded the scope and size of our Compression Division's business, with larger manufacturing and unit sales and aftermarket service operations. Additionally, CSI’s business includes operations and equipment that we have not historically provided. Consequently, we may not be able to integrate CSI’s operations into our Compression Division's operations or to realize the expected economic benefits of the CSI Acquisition.
We have technological and age-obsolescence risk, both with our products and services as well as with our equipment assets.
New drilling, completion, and production technologies and equipment are constantly evolving. If we are unable to adapt to new advances in technology or replace older assets with new assets, we are at risk of losing customers and market share. In particular, many of our significant equipment assets, including one of our heavy lift barges and certain dive support vessels, are approaching the end of their useful lives, which may adversely affect our ability to serve certain customers. Other equipment, such as a portion of our production testing equipment fleet, may be inadequate to meet the needs of our customers in certain markets. The permanent replacement or upgrade of any of our vessels or equipment will require significant capital. Due to the unique nature of many of these assets, finding a suitable or acceptable replacement may be difficult and/or cost prohibitive. The replacement or enhancement of these assets over the next several years may be necessary in order for us to effectively compete in the current marketplace.
We face risks related to our long-term growth strategy.
Our long-term growth strategy includes both internal growth and growth through acquisitions. Internal growth may require significant capital expenditures, some of which may become unrecoverable or fail to generate an acceptable level of cash flows. Internal growth also requires financial resources (including the use of available cash or additional long-term debt), management, and personnel resources. Acquisitions also require significant
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management resources, both at the time of the transaction and during the process of integrating the newly acquired business into our operations. If we overextend our current financial resources by growing too aggressively, we could face liquidity problems or have difficulty obtaining additional financing. Acquisitions could adversely affect our operations if we are unable to successfully integrate the newly acquired companies into our operations, are unable to hire adequate personnel, or are unable to retain existing personnel. We may not be able to consummate future acquisitions on favorable terms. Acquisition or internal growth assumptions developed to support our decisions could prove to be overly optimistic. Future acquisitions by us could result in issuances of equity securities or the rights associated with the equity securities, which could potentially dilute earnings per share. Future acquisitions could result in the incurrence of additional debt or contingent liabilities and amortization expenses related to intangible assets. These factors could adversely affect our future operating results and financial position.
Our operations involve significant operating risks and insurance coverage may not be available or cost-effective.
We are subject to operating hazards normally associated with the oilfield service industry, including automobile accidents, fires, explosions, blowouts, formation collapse, mechanical problems, abnormally pressured formations, and environmental accidents. Environmental accidents could include, but are not limited to oil spills, gas leaks or ruptures, uncontrollable flows of oil, gas, or well fluids, or discharges of CBFs or toxic gases or other pollutants. These operating hazards may also include injuries to employees and third parties during the performance of our operations. Our operation of marine barges and vessels, heavy equipment, offshore production platforms, chemical manufacturing plants, and the performance of heavy lift and diving services involve particularly high levels of risk. In addition, certain of our employees who perform services on offshore platforms and vessels are covered by the provisions of the Jones Act, the Death on the High Seas Act, and general maritime law. These laws make the liability limits established by state workers’ compensation laws inapplicable to these employees and, instead, permit our affected employees or their representatives to pursue actions against us for damages for job-related injuries. Whenever possible, we obtain agreements from customers and suppliers that limit our exposure. However, the occurrence of certain operating hazards, including storms, could result in substantial losses to us due to injury or loss of life, damage to or destruction of property and equipment, pollution or environmental damage, and suspension of operations.
We have maintained a policy of insuring our risks of operational hazards that we believe is typical in the industry. We believe that the limits of insurance coverage we have purchased are consistent with the exposures we face and the nature of our products and services. Due to economic conditions in the insurance industry, from time to time, we have increased our self-insured retentions for certain policies in order to minimize the increased costs of coverage, or we have reduced our limits of insurance coverage for, or not procured, named windstorm coverage. In certain areas of our business, we, from time to time, have elected to assume the risk of loss for specific assets. Due to the sale of substantially all of Maritech's oil and gas properties, typical operational risk coverage for its remaining properties, such as removal of debris, operators extra expense, control of well, and pollution and cleanup coverage, is not available at economical rates. To the extent we suffer losses or claims that are not covered, or are only partially covered by insurance, our results of operations could be adversely affected.
We could incur losses on fixed price contracts.
Due to competitive market conditions, a portion of our well abandonment and decommissioning projects may be performed on a lump sum basis. Pursuant to these types of contracts, defined work is delivered for a fixed price, and extra work, which is subject to customer approval, is charged separately. The revenue, cost, and gross profit realized on these types of contracts can vary from the estimated amount because of changes in offshore conditions, increases in the scope of the work to be performed, increased site clearance efforts required, labor and equipment availability, cost and productivity levels, and the performance level of other contractors. In addition, unanticipated events, such as accidents, work delays, significant changes in the condition of platforms or wells, downhole problems, weather, and environmental or other technical issues, could result in significant losses on these types of projects. These variations and risks may result in our experiencing reduced profitability or losses on these types of projects.
The valuation of decommissioning liabilities is based on estimated data that may be materially incorrect.
Our estimates of future well abandonment and decommissioning liabilities are imprecise and are subject to change due to: (i) changes in the forecasts of the supply, demand, cost and timing of well abandonment and decommissioning services; (ii) additional remediation work required on previously completed well abandonment
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projects; (iii) damage to wells and infrastructure caused by hurricanes and other natural events; (iv) changes in governmental regulations governing well abandonment and decommissioning work; and (v) other factors. In particular, a portion of the remaining decommissioning liabilities for our Maritech subsidiary relates to an offshore production platform that was toppled and destroyed by a hurricane and the estimate to perform the remaining decommissioning and debris removal work on this property is particularly imprecise due to the unique nature of the work to be performed. During the three year period ended December 31, 2015, Maritech increased its combined decommissioning liability by a total of approximately $152.7 million, consisting of $73.4 million of revisions to its existing liabilities as well as $79.3 million from adding new liabilities for remediation work required on projects previously thought to have been completed.
As noted above, Maritech has encountered situations where previously plugged and abandoned wells on its properties have later exhibited a buildup of pressure that is evidenced by gas bubbles coming from the plugged well head. We refer to this situation as “wells under pressure”, and this can either be discovered by us when we perform additional work at the property or by notification from a third party. Wells under pressure require Maritech to return to the site to perform additional plug and abandonment procedures that were not originally anticipated or included in the estimate of the asset retirement obligation for such property. Remediation work at previously abandoned well sites is particularly costly due to the lack of a platform from which to base these activities. During 2014, Maritech added new decommissioning liabilities of approximately $39.2 million for work performed during the year or related to the estimated cost of future work to be performed on previously plugged and abandoned wells. This additional amount was directly charged to earnings as an operating expense during 2014. Maritech is the last operator of record for its plugged wells and bears the risk of additional future work required as a result of wells becoming under pressure in the future.
Weather-Related Risks
Certain of our operations are seasonal and depend, in part, on weather conditions.
The Offshore Division's Offshore Services segment has historically enjoyed its highest vessel utilization rates during the period from April to October, when weather conditions in the Gulf of Mexico are typically more favorable for offshore activities, and has experienced its lowest utilization rates in the period from November to March. Under certain lump sum and other contracts, this segment may bear the risk of delays caused by adverse weather conditions. In addition, demand for other products and services we provide are subject to seasonal fluctuations, due in part to weather conditions that cannot be predicted. Accordingly, our operating results may vary from quarter to quarter, depending on weather conditions in applicable areas.
In certain markets, the Fluids Division’s onshore water management services can be dependent on adequate water supplies being available to its customers. To the extent severe drought or other weather-related conditions prevent our customers from obtaining needed water, frac water operations may not be possible and our Fluids Division business may be negatively affected.
Severe weather, including named windstorms, can cause significant damage and disruption to our businesses.
A significant portion of our operations is susceptible to adverse weather conditions in the Gulf of Mexico, including hurricanes and other extreme weather conditions. High winds, storm surge, and turbulent seas can cause significant damage and curtail our operations for extended periods during and after such weather conditions, while damage is being assessed and remediated. Even if we do not experience direct damage from storms, we may experience disruptions in our operations, because we are unable to operate or our customers or suppliers may curtail their activities due to damage to their wells, platforms, pipelines, and facilities. From time to time, our onshore operations are also negatively affected by adverse weather conditions, including sustained rain and flooding.
A portion of the costs resulting from damages from previous hurricanes has yet to be incurred and may result in significant charges to earnings.
During the past four years, Maritech has performed an extensive amount of well intervention, abandonment, decommissioning, debris removal, and platform construction associated with its offshore platforms that were destroyed by hurricanes. As of December 31, 2015, Maritech has remaining hurricane damage response work associated with one of the downed platforms, and the estimated cost to perform this remaining abandonment,
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decommissioning, and debris removal work is approximately $7.8 million net to our interest. Due to the unique nature of the remaining work to be performed, actual costs could greatly exceed these estimates and, depending on the nature of any excess costs incurred, could result in significant charges to earnings in future periods. All of this $7.8 million estimated amount has been accrued as part of Maritech’s decommissioning liabilities. Our estimates of the remaining costs to be incurred may be imprecise.
For a further discussion of the remaining costs resulting from damages from the 2005 and 2008 hurricanes, see Notes to Consolidated Financial Statements, “Note B – Summary of Significant Accounting Policies, Repair Costs and Insurance Recoveries.”
We have elected to self-insure windstorm damage to our remaining Maritech assets in the Gulf of Mexico, and hurricane damages could result in significant uninsured losses.
Despite the sales of substantially all of Maritech’s oil and gas reserves during 2011 and 2012, and expending approximately $187.7 million of decommissioning work during the three year period ended December 31, 2015, we have remaining decommissioning liabilities of approximately $48.4 million associated with offshore platforms and associated wells to be decommissioned and abandoned. We have discontinued insurance coverage for windstorm damage and have elected to self-insure these risks. To the extent that remaining offshore platforms and associated wells are not decommissioned and abandoned prior to a windstorm occurring, Maritech would be exposed to losses from windstorm damages and storms in the future. Depending on the severity and location of the storms, such losses could be significant and could have a material adverse effect on our financial position, results of operation, and cash flows.
Financial Risks
Deterioration of our financial ratios could result in covenant defaults under our long-term debt agreements and result in decreased credit availability.
As of December 31, 2015, our total debt outstanding of approximately $293.0 million consisted of approximately $22.9 million under our bank revolving credit agreement (the "Credit Agreement") and approximately $270.1 million carrying amount of our Senior Notes and Senior Secured Notes. In addition, our consolidated balance sheet includes approximately $580.5 million of long-term debt of CCLP (consisting of approximately $235.0 million under the CCLP Credit Agreement and approximately $345.5 million carrying amount under the CCLP Senior Notes). Additional growth could result in increased debt levels to support our or CCLP's capital expenditure needs or acquisition activities. Debt service costs related to outstanding long-term debt represent a significant use of our operating cash flow and could increase our vulnerability to general adverse economic and industry conditions.
These long-term debt agreements contain customary covenants and other restrictions and requirements. In addition, the agreements require us to maintain certain financial ratios, including a minimum interest charge coverage ratio and a maximum leverage ratio, both of which are defined in our Credit Agreement and in the note purchase agreements relating to our Senior Notes and Senior Secured Notes. Deterioration of these ratios could result in a default under the agreements. Although these agreements include cross-default provisions relating to other of our indebtedness that is greater than a defined amount, we have no cross default provisions, cross collateralization provisions, or cross guarantees with CCLP's debt, nor does CCLP with our debt. If any such indebtedness is not paid or is accelerated and such event is not remedied in a timely manner, a default will occur under our long-term debt agreements. Any event of default, if not timely remedied, could result in a termination of all commitments of the lenders and an acceleration of any outstanding loans and credit obligations.
Access to our revolving credit line is dependent upon our compliance with the financial ratio covenants set forth in the Credit Agreement. These financial ratios include a minimum interest charge coverage ratio (ratio of a defined measure of earnings to interest) of 3.0 and a maximum leverage ratio (ratio of debt and letters of credit outstanding to a defined measure of earnings) of 3.25. The maximum leverage ratio decreases to 3.0 as of March 31, 2016. Consolidated net earnings under the credit facility is the aggregate of our net income (or loss) and the net income (or loss) of our consolidated restricted subsidiaries, including cash dividends and distributions (not the return of capital) received from persons other than consolidated restricted subsidiaries (such as distributions from CCLP) and after allowances for taxes for such period determined on a consolidated basis in accordance with U.S. generally accepted accounting principles ("GAAP"), excluding certain items more specifically described therein. This definition of consolidated net earnings excludes an amount of extraordinary and nonrecurring gains and losses
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up to 25% of a measure of earnings. In addition, the note purchase agreements relating to our Senior Notes include similar financial covenants. Under these note purchase agreements, the financial ratio requirements include a minimum interest coverage ratio of 2.5 and a maximum leverage ratio of 3.5. At December 31, 2015, the Company’s leverage ratio was 1.86 to 1.
Our continuing ability to comply with these financial covenants depends largely upon our ability to generate adequate operating cash flows. Historically, our financial performance has been more than adequate to meet these covenants. Due to the decreased demand for certain of our products and services by our customers in response to decreased oil and natural gas prices, we have taken strategic cost reduction efforts, including headcount reductions, deferral of salary increases, salary reductions, and other efforts to reduce costs and generate cash to mitigate the reduced demand for our products and services. In addition, certain of our businesses have seen increased activity and profitability levels, despite current oil and natural gas prices. Based on our projections for each of the quarterly periods in 2016, and including the impact of these cost reduction efforts and expected activity levels on future estimated operating cash flows, we anticipate that we will have sufficient operating cash flows to maintain compliance with the financial covenants under our long-term debt agreements through December 31, 2016.
CCLP's continuing ability to comply with its financial covenants depends largely upon its ability to generate adequate cash flow. Historically, CCLP's financial performance has been more than adequate to meet these covenants, and CCLP expects this trend to continue. However, as a result of the recent decreased demand for certain of CCLP's products and services by its customers in response to decreased oil and natural gas prices, and CCLP's expectation that the reduced demand will continue for an indefinite period, CCLP has taken strategic cost reduction efforts, including headcount reductions, deferral of salary increases, salary reductions, and other efforts to reduce costs and generate cash. Based on CCLP's projections for each of the quarterly periods in 2016, and including the impact of these cost-reduction efforts to increase operating cash flows, CCLP anticipates that it will be in compliance with the financial covenants and other requirements under the CCLP Credit Agreement and CCLP Senior Notes through December 31, 2016. However, there is a remote possibility that CCLP may fail to be in compliance with its financial covenants going forward, and would consequently be in a condition of default under the CCLP Credit Agreement and CCLP Senior Notes if CCLP fails to obtain a waiver or amendment from its lenders. There can be no assurance that CCLP cost reductions will be successful or that market conditions and operating performance will not be further decreased compared to its projections.
CCLP's long-term debt levels may limit the amount of cash available to be distributed, which will affect our cash flows.
As of December 31, 2015, CCLP had approximately $235.0 million outstanding under the CCLP Credit Agreement, $350 million aggregate principal amount outstanding under the CCLP 7.25% Senior Notes, and it may incur significant additional indebtedness in the future. As of March 3, 2016, the amount outstanding under the CCLP Credit Agreement had increased to approximately $254.0 million. The level of CCLP indebtedness could have important consequences to us, including the following:

• | CCLP's ability to obtain additional financing, if necessary, for its working capital, capital expenditures (including acquisitions), or other purposes, may be impaired or such financing may not be available on favorable terms;

• | covenants contained in CCLP's existing and future credit and debt arrangements will require it to meet financial tests that may affect its flexibility in planning for and reacting to changes in its business, including possible acquisition opportunities;

• | CCLP's use of a portion of its cash flow to make principal and interest payments on its indebtedness will reduce the funds that would otherwise be available for distributions to unitholders, including to us;

• | CCLP may be more vulnerable to competitive pressures or a downturn in its business or the economy generally; and

• | CCLP's flexibility in responding to changing business and economic conditions may be affected.

Increases in CCLP's indebtedness would increase its total interest expense, which would in turn reduce its forecasted cash available for distribution. CCLP's ability to service its indebtedness will depend upon, among other things, its future financial and operating performance, which will be affected by prevailing economic conditions and financial, business, regulatory and other factors, some of which are beyond its control. If CCLP's operating results are not sufficient to service its current or future indebtedness, CCLP will be forced to take actions such as further
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reducing distributions, reducing or delaying its business activities, acquisitions, investments and/or capital expenditures, selling assets, restructuring or refinancing its indebtedness, or seeking additional equity capital or bankruptcy protection. CCLP may not be able to effect any of these remedies on satisfactory terms, or at all.
CCLP continues to review its operating activity levels in the current low commodity price environment and the impact of the current market environment on its anticipated levels of distributable cash flows and quarterly distributions. The amount of distributions we received from CCLP, including those based on the impact of the incentive distribution rights owned by our wholly owned subsidiary, CSI Compressco GP Inc., resulted in an increase in the quarterly distributions we received from CCLP during 2015 compared to the prior year. In January 2016, however, CCLP declared a cash distribution attributable to the quarter ended December 31, 2015, of $0.3775 per unit, which represents a decrease of $0.1250 or 24.9% per unit compared to the previous quarterly distribution. The amount of quarterly distributions is determined based on a variety of factors, including estimates of CCLP's cash needs to fund its future operating, investing, and debt service requirements. During the current period of low oil and natural gas pricing, there can be no assurance that quarterly distributions from CCLP will increase from this reduced amount per unit or that there will not be future decreases in the amount of distributions going forward.
We may have continuing exposure to abandonment and decommissioning obligations associated with oil and gas properties previously owned by Maritech.
During 2011, in connection with the sale of a significant majority of Maritech’s oil and gas producing properties, the buyers of the properties assumed the associated decommissioning liabilities, which had an estimated value at the time of sale of approximately $122.0 million pursuant to the purchase and sale agreements. For oil and gas properties Maritech previously owned, the buyer of the properties assumed the financial responsibilities associated with the properties' operations, including abandonment and decommissioning, and generally became the successor operator. Some buyers of these Maritech properties subsequently sold certain of these properties to other buyers, who also assumed the financial responsibilities associated with the properties' operations, and these buyers also typically became the successor operator of the properties. To the extent that a buyer of these properties fails to perform the abandonment and decommissioning work required, a previous owner, including Maritech, may be required to perform the abandonment and decommissioning obligation. A significant portion of the decommissioning liabilities that were assumed by the buyers of the Maritech properties in 2011 remains unperformed, and we believe the amounts of these remaining liabilities are significant. We monitor the financial condition of the buyers of these properties from Maritech, and if current oil and natural gas pricing levels continue or deteriorate further, we expect that one or more of these buyers may be unable to perform the decommissioning work required on properties they acquired from Maritech. To the extent Maritech is required to perform a significant portion of the abandonment and decommissioning obligations associated with these previously owned oil and gas properties, our financial condition and results of operations may be negatively affected.
During the year ended December 31, 2015, continued low oil and natural gas prices have resulted in reduced revenues and cash flows for all oil and gas producing companies, including those companies that bought Maritech properties in the past. Certain of these oil and gas producing companies that bought Maritech properties are currently experiencing severe financial difficulties. With regard to certain of these properties, Maritech has security in the form of bonds or cash escrows intended to secure the buyers' obligations to perform the decommissioning work. One company that bought, and subsequently sold, Maritech properties filed for Chapter 11 bankruptcy protection in August 2015. Maritech estimates that of the total amount of decommissioning liabilities associated with properties sold to this company, Maritech is exposed to a high level of risk on properties that had decommissioning liabilities at the time they were sold in 2011 of approximately $6 million. This amount, which is net to Maritech's interest, may not be representative of the current fair value of these obligations and does not reflect the potential benefit of bonding that may be available to Maritech if it were to be required to perform such obligations. Maritech and its legal counsel monitor the status of these companies. There can be no assurance that Maritech will not become legally responsible to perform decommissioning work on properties it previously sold, resulting in charges to our future earnings and increases to our future operating cash requirements.
We are exposed to significant credit risks.
We face credit risk associated with the significant amounts of accounts receivable we have with our customers in the energy industry. Many of our customers, particularly those associated with our onshore operations, are small- to medium-sized oil and gas operators that may be more susceptible to declines in oil and gas commodity prices or generally increased operating expenses than larger companies. Our ability to collect from our customers is impacted by the current decreased oil and natural gas price environment.
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As the owner and operator of its oil and gas property interests, Maritech is liable for the proper abandonment and decommissioning of these properties. We have guaranteed a portion of the abandonment and decommissioning liabilities of Maritech. With respect to certain properties, Maritech is entitled to be paid by the previous owner of the property in the future for all or a portion of the cost of satisfying these obligations when the liability is satisfied. We and Maritech are subject to the risk that the previous owner(s) will be unable to make these future payments. In addition, for certain remaining Maritech properties that have not been decommissioned or abandoned, the co-owners of such properties are responsible for the payment of their portions of the associated operating expenses and abandonment liabilities. However, if one or more co-owners do not pay their portions, Maritech and any other nondefaulting co-owners may be liable for the defaulted amount. If any required payment is not made by a previous owner or a co-owner and any security is not sufficient to cover the required payment, we could suffer losses, which could be material.
During the year ended December 31, 2015, continued decreased oil and natural gas prices have resulted in reduced revenues and cash flows for oil and gas producing companies, including companies that are joint-owners in Maritech oil and gas properties and decommissioning obligations currently owned or from whom Maritech is entitled to receive payments upon satisfaction of certain decommissioning obligations. Certain of these previous owners of Maritech properties who are obligated to pay Maritech in the future are currently experiencing severe financial difficulties, including one company which filed for bankruptcy protection during the third quarter of 2015. The majority of the amounts owed to Maritech by these companies are not contractually required to be paid to Maritech until several years in the future. Nevertheless, we are monitoring the financial condition of this company, and if current oil and natural gas pricing levels continue, this company may be unable to pay Maritech for contractual amounts owed. Maritech intends to take any action necessary to protect Maritech's interests. Although certain of these decommissioning obligations may not be performed for many years, there can be no assurance that the current oil and gas price environment will not result in charges to our future earnings and increases to our future operating cash requirements.
Our operating results and cash flows for certain of our subsidiaries are subject to foreign currency risk.
The operations of certain of our subsidiaries are exposed to fluctuations between the U.S. dollar and certain foreign currencies, particularly the euro, the British pound, the Mexican peso, and the Argentinian peso. Our plans to grow our international operations could cause this exposure from fluctuating currencies to increase. Historically, exchange rates of foreign currencies have fluctuated significantly compared to the U.S. dollar, and this exchange rate volatility is expected to continue. Significant fluctuations in foreign currencies against the U.S. dollar could adversely affect our balance sheet and results of operations.
We are exposed to interest rate risk with regard to our indebtedness.
As of December 31, 2015, we and CCLP have a total of $257.9 million outstanding under our respective revolving credit facilities. These revolving credit facilities consist of floating rate loans that bear interest at an agreed upon percentage rate spread (which is determined on our leverage ratio) above LIBOR. Accordingly, our cash flows and results of operations could be subject to interest rate risk exposure associated with the level of the variable rate debt balance outstanding. We currently are not a party to an interest rate swap contract or other derivative instrument designed to hedge our exposure to interest rate fluctuation risk.
Our revolving credit facility is scheduled to mature on September 30, 2019. CCLP's revolving credit facility is scheduled to mature on October 15, 2019. Our Senior Notes and CCLP's Senior Notes bear interest at fixed interest rates and are scheduled to mature at various dates between December 2017 and November 2022. There can be no assurance that the financial market conditions or borrowing terms at the times these existing debt agreements are renegotiated will be as favorable as the current terms and interest rates.
Legal, Regulatory, and Political Risks
Our operations are subject to extensive and evolving U.S. and foreign federal, state and local laws and regulatory requirements that increase our operating costs and expose us to potential fines, penalties, and litigation.
Laws and regulations govern our operations, including those relating to corporate governance, employees, taxation, fees, importation and exportation restrictions, environmental affairs, health and safety, and the manufacture, storage, handling, transportation, use, and sale of chemical products. Certain foreign countries
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impose additional restrictions on our activities, such as currency restrictions and restrictions on various labor practices. Our operation and decommissioning of offshore properties are subject to and affected by various government regulations, including numerous federal and state environmental, health and safety laws and regulations. These laws and regulations are becoming increasingly complex and stringent, and compliance is becoming increasingly expensive. Governmental authorities have the power to enforce compliance with these regulations, and violators are subject to civil and criminal penalties, including civil fines, and injunctions. Third parties may also have the right to pursue legal actions to enforce compliance with certain laws and regulations. It is possible that increasingly strict environmental, health and safety laws, regulations, and enforcement policies could result in substantial costs and liabilities to us.
The EPA is studying the environmental impact of hydraulic fracturing, a process used by the U.S. oil and gas industry in the development of certain oil and gas reservoirs. Specifically, the EPA is reviewing the impact of hydraulic fracturing on drinking water resources. Certain environmental and other groups have suggested that additional federal, state, and local laws and regulations may be needed to more closely regulate the hydraulic fracturing process. Several states have adopted regulations that require operators to disclose the chemical constituents in hydraulic fracturing fluids. We cannot predict whether any federal, state or local laws or regulations will be enacted regarding hydraulic fracturing, and, if so, what actions any such laws or regulations would require or prohibit. If additional levels of regulation or permitting requirements were imposed on oil and gas operators through the adoption of new laws and regulations, the domestic demand for certain of our products and services could be decreased or subject to delays, particularly for our Production Testing, Compression, and Fluids Divisions.
A large portion of the services performed by our Offshore Division's Offshore Services segment and all of Maritech’s remaining well abandonment and decommissioning operations are conducted on offshore federal leases and are governed by increasing U.S. government regulations. Government regulations also establish construction requirements for production facilities located on federal offshore leases and govern the plugging and abandonment of wells and the removal of production facilities from these leases. Operators must abide by Idle Iron Guidance regulations that regulate the permanent plugging of nonproducing wells and the dismantling of oil and gas production platforms within a certain period of time after they are no longer being used. BSEE oversees the provisions of the Idle Iron Guidance. Under limited circumstances, the BSEE could require Maritech or our Offshore Services segment to suspend or terminate their operations on a federal lease, and both Maritech and our Offshore Services segment could be subject to fines and penalties.
We have significant operations that are either ongoing or scheduled to commence in the U.S. Gulf of Mexico. At this time, we cannot predict the full impact that other regulatory actions that may be mandated by the federal government may have on our operations or the operations of our customers. Other governmental or regulatory actions could further reduce our revenues and increase our operating costs, including the cost to insure offshore operations, resulting in reduced cash flows and profitability.
Our onshore and offshore operations expose us to risks such as the potential for harmful substances escaping into the environment and causing damages or injuries, which could be substantial. Although we maintain general liability and pollution liability insurance, these policies are subject to exceptions and coverage limits. We maintain limited environmental liability insurance covering named locations and environmental risks associated with contract services for oil and gas operations. We could be materially and adversely affected by an enforcement proceeding or a claim that is not covered or is only partially covered by insurance.
Because our business depends on the level of activity in the oil and natural gas industry, existing or future laws, regulations, treaties, or international agreements that impose additional restrictions on the industry may adversely affect our financial results. Regulators are becoming more focused on air emissions from oil and gas operations, including volatile organic compounds, hazardous air pollutants, and greenhouse gases. In particular, the focus on greenhouse gases and climate change, including incentives to conserve energy or use alternative energy sources, could have a negative impact on our financial results if such laws, regulations, treaties, or international agreements reduce the worldwide demand for oil and natural gas or otherwise result in reduced economic activity generally. In addition, such laws, regulations, treaties, or international agreements could result in increased compliance costs, capital spending requirements, or additional operating restrictions for us, which may have a negative impact on our financial results.
In addition to increasing our risk of environmental liability, the rigorous enforcement of environmental laws and regulations has accelerated the growth of some of the markets we serve. Decreased regulation and
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enforcement in the future could materially and adversely affect the demand for certain of the services offered by our Offshore Services operations and, therefore, materially and adversely affect our business.
Our expansion into foreign countries exposes us to complex regulations and may present us with new obstacles to growth.
We plan to continue to grow both in the United States and in foreign countries. We have established operations in, among other countries, Argentina, Brazil, Canada, Finland, Ghana, Iraq, Mexico, Norway, Saudi Arabia, Sweden, and the United Kingdom. Foreign operations carry special risks. Our business in the countries in which we currently operate and those in which we may operate in the future could be limited or disrupted by:

• | restrictions on repatriating cash back to the United States;

• | the impact of compliance with anti-corruption laws on our operations and competitive position in affected countries and the risk that actions taken by us or our agents may violate those laws;

• | government controls and government actions, such as expropriation of assets and changes in legal and regulatory environments;

• | import and export license requirements;

• | political, social, or economic instability;

• | trade restrictions;

• | changes in tariffs and taxes; and

• | our limited knowledge of these markets or our inability to protect our interests.

We and our affiliates operate in countries where governmental corruption has been known to exist. While we and our subsidiaries are committed to conducting business in a legal and ethical manner, there is a risk of violating either the U.S. Foreign Corrupt Practices Act, the U.K Bribery Act, or laws or legislation promulgated pursuant to the 1997 OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions or other applicable anti-corruption regulations that generally prohibit the making of improper payments to foreign officials for the purpose of obtaining or keeping business. Violation of these laws could result in monetary penalties against us or our subsidiaries and could damage our reputation and, therefore, our ability to do business.
Foreign governments and agencies often establish permit and regulatory standards different from those in the U.S. If we cannot obtain foreign regulatory approvals, or if we cannot obtain them in a timely manner, our growth and profitability from foreign operations could be adversely affected.
Our growing operations in Argentina expose us to the changing economic, legal, and political environments in that country, including the changing regulations over repatriation of cash generated from our operations in Argentina.
The current economic, legal, and political environment in Argentina and recent devaluation of the Argentinian peso have created increased economic instability for foreign investment in Argentina. The Argentinian government is currently attempting to address the current high rate of inflation and the continuing devaluations pressure. Fiscal and monetary expansion in Argentina has led to devaluations of the Argentinian peso, particularly in late 2013, early 2014, and late 2015. Additional currency adjustment may be necessary to help boost the current Argentina economy, but may be accompanied by fiscal and monetary tightening, including additional restrictions on the purchase of U.S. dollars in Argentina.
As a result of our expanding operations in Argentina, consolidated revenues and operating cash flow generated in Argentina have increased over the past three years. As of December 31, 2015, approximately $3.5 million of our consolidated cash balance is located in Argentina, and the process of repatriating this cash to the U.S. is subject to increasingly complex regulations. There can be no assurances that our growing Argentinian operations will not expose us to a loss of liquidity, foreign exchange losses, and other potential financial impacts.
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Climate change legislation or regulations restricting emissions of “greenhouse gases” could result in increased operating costs and reduced demand for the oil and natural gas our customers produce, while the physical effects of climate change could disrupt production and cause us to incur costs in preparing for or responding to those effects.
The EPA has determined that “greenhouse gases” ("GHGs") present an endangerment to public health and the environment, because emissions of such gases are, according to the EPA, contributing to warming of the earth’s atmosphere and other climatic changes. These findings allow the EPA to adopt and implement regulations that would restrict emissions of GHGs under existing provisions of the federal Clean Air Act ("CAA"). Based on these findings, the EPA has begun adopting and implementing regulations to restrict emissions of GHGs under existing provisions of the CAA. The EPA rules regulate GHG emissions under the CAA and require a reduction in emissions of GHGs from motor vehicles and from certain large stationary sources as well as requiring so-called “green” completions at hydraulically fractured natural gas wells beginning in 2015. The EPA also requires the annual reporting of GHG emissions from specified large GHG emission sources in the United States, including petroleum refineries, as well as from certain oil and gas production facilities.
The adoption and implementation of any regulations imposing reporting obligations on, or limiting emissions of GHGs from, our facilities and operations could require us to incur costs. Further, Congress has considered and almost one-half of the states have adopted legislation that seeks to control or reduce emissions of GHGs from a wide range of sources. Any such legislation could adversely affect demand for the oil and natural gas our customers produce and, in turn, demand for our products and services. Finally, it should be noted that some scientists have concluded that increasing concentrations of GHGs in the Earth’s atmosphere may produce climate changes that have significant physical effects, such as increased frequency and severity of storms, floods, and other climatic events; if any such effects were to occur, they could have an adverse effect on our operations and cause us to incur costs in preparing for or responding to those effects.
Our proprietary rights may be violated or compromised, which could damage our operations.
We own numerous patents, patent applications, and unpatented trade secret technologies in the U.S. and certain foreign countries. There can be no assurance that the steps we have taken to protect our proprietary rights will be adequate to deter misappropriation of these rights. In addition, independent third parties may develop competitive or superior technologies.
Our operations and reputation may be impaired if our information technology systems fail to perform adequately or if we are the subject of a data breach or cyberattack.
Our information technology systems are critically important to operating our business efficiently. We rely on our information technology systems to manage our business data, communications, supply chain, customer invoicing, employee information, and other business processes. We outsource certain business process functions to third-party providers and similarly rely on these third-parties to maintain and store confidential information on their systems. The failure of these information technology systems to perform as we anticipate could disrupt our business and could result in transaction errors, processing inefficiencies, and the loss of sales and customers, causing our business and results of operations to suffer.
Furthermore, our information technology systems may be vulnerable to security breaches beyond our control, including those involving cyberattacks using viruses, worms or other destructive software, process breakdowns, phishing or other malicious activities, or any combination of the foregoing. Such breaches could result in unauthorized access to information including customer, supplier, employee, or other company confidential data. We do not carry insurance against these risks, although we do invest in security technology, perform penetration tests from time to time, and design our business processes to attempt to mitigate the risk of such breaches. However, there can be no assurance that security breaches will not occur. Moreover, the development and maintenance of these measures requires continuous monitoring as technologies change and efforts to overcome security measures evolve. We have experienced, and expect to continue to experience, cyber security threats and incidents, none of which has been material to us to date. However, a successful breach or attack could have a material negative impact on our operations or business reputation and subject us to consequences such as litigation and direct costs associated with incident response.
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Item 1B. Unresolved Staff Comments.
None.
Item 2. Properties.
Our properties consist primarily of our corporate headquarters facility, chemical plants, processing plants, distribution facilities, heavy lift barge rigs, and dive support vessels. The following information describes facilities that we leased or owned as of December 31, 2015. We believe our facilities are adequate for our present needs.
Facilities
Fluids Division
Our Fluids Division facilities include seven chemical production plants located in the states of Arkansas, California, Louisiana, and West Virginia, and the country of Finland, having a total production capacity of more than 1.5 million equivalent liquid tons per year. The two California locations consist of 29 square miles of leased mineral acreage and solar evaporation ponds, and related owned production and storage facilities.
As an inducement to locate our calcium chloride production plant in Union County, Arkansas, we received certain ad valorem property tax incentives. Our facility is located just outside the city of El Dorado, Arkansas, on property that is leased from Union County, Arkansas. We have the option of purchasing the property at any time during the term of the lease for a nominal price. The term of the lease expires in 2035, at which time we also have the option to purchase the property at a nominal price. Under the terms of the lease, we are responsible for all costs incurred related to the facility.
In addition to the production facilities described above, the Fluids Division owns or leases multiple service center facilities in the United States and in other countries. The Fluids Division also leases several offices and numerous terminal locations in the United States and in other countries.
We lease approximately 33,000 gross acres of bromine-containing brine reserves in Magnolia, Arkansas, for possible future development and as a source of supply for our bromine and other raw materials.
Production Testing Division
The Production Testing segment conducts its operations through production testing service centers (most of which are leased) in the United States, located in Colorado, Louisiana, North Dakota, Oklahoma, Pennsylvania, Texas, West Virginia, and Wyoming. In addition, the Production Testing segment has leased facilities in Brazil, Mexico, United Arab Emirates, United Kingdom, Saudi Arabia, Iraq, Argentina, Australia, Canada, and Colombia.
Compression Division
The Compression Division’s facilities include owned headquarters and fabrication facilities in Midland, Texas and Oklahoma City, Oklahoma, and several owned and leased service and sales facilities in the United States, Mexico, Canada, and Argentina. All obligations under the bank revolving credit facility for CCLP are secured by a first lien security interest in substantially all of CCLP’s assets, including the Midland, Texas and Oklahoma City, Oklahoma fabrication facilities.
For a profile of our compression fleet, see "Item 1. Business "Products and Services - Compression."
Offshore Division
The Offshore Division conducts its operations through four offices and service facility locations (three of which are leased) located in Texas and Louisiana. In addition, the Offshore Services segment owns the following fleet of vessels that it uses in performing its well abandonment, decommissioning, construction, and contract diving operations:
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TETRA Hedron | Derrick barge with 1,600-metric-ton revolving crane
TETRA Arapaho | Derrick barge with 725-metric-ton revolving crane
Epic Explorer | 210-foot dive support vessel with saturation diving system

We have access to additional leased vessels as needed to adjust to demand for our services.
Corporate
Our headquarters is located in The Woodlands, Texas, in a 153,000 square foot office building, which is located on 2.6 acres of land. In December 2012, we entered into a sale leaseback transaction where we sold the headquarters building and land for a sale price of $43.8 million before transaction costs and other deductions, and leased back the facility for an initial lease term of 15 years. In addition, we own a 28,000 square foot technical facility in The Woodlands, Texas, to service our Fluids Division operations.
Item 3. Legal Proceedings.
We are named defendants in numerous lawsuits and respondents in certain governmental proceedings arising in the ordinary course of business. While the outcome of lawsuits or other proceedings against us cannot be predicted with certainty, management does not consider it reasonably possible that a loss resulting from such lawsuits or other proceedings in excess of any amounts accrued has been incurred that is expected to have a material adverse effect on our financial condition, results of operations, or liquidity.
Environmental Proceedings
One of our subsidiaries, TETRA Micronutrients, Inc. ("TMI"), previously owned and operated a production facility located in Fairbury, Nebraska. TMI is subject to an Administrative Order on Consent issued to American Microtrace, Inc. (n/k/a/ TETRA Micronutrients, Inc.) in the proceeding styled In the Matter of American Microtrace Corporation, EPA I.D. No. NED00610550, Respondent, Docket No. VII-98-H-0016, dated September 25, 1998 (the "Consent Order"), with regard to the Fairbury facility. TMI is liable for future remediation costs and ongoing environmental monitoring at the Fairbury facility under the Consent Order; however, the current owner of the Fairbury facility is responsible for costs associated with the closure of that facility.
Item 4. Mine Safety Disclosures.
None.
PART II
Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Repurchases of Equity Securities.
Price Range of Common Stock
Our common stock is traded on the New York Stock Exchange under the symbol “TTI.” As of March 4, 2016, there were approximately 381 holders of record of the common stock. The following table sets forth the high and low sale prices of the common stock for each calendar quarter in the two years ended December 31, 2015, as reported by the New York Stock Exchange.
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|  | High |  | Low
2015 |  |  |  |  |  |
First Quarter |  | $ | 6.84 |  |  | $ | 4.72 |
Second Quarter |  | 7.52 |  |  | 5.85 |
Third Quarter |  | 7.76 |  |  | 4.62 |
Fourth Quarter |  | 9.44 |  |  | 5.66 |
2014 |  |  |  |  |  |
First Quarter |  | $ | 12.84 |  |  | $ | 9.92 |
Second Quarter |  | 13.43 |  |  | 10.87 |
Third Quarter |  | 12.11 |  |  | 9.25 |
Fourth Quarter |  | 10.96 |  |  | 4.90 |

Market Price of Common Stock
The following graph compares the five-year cumulative total returns of our common stock, the Standard & Poor’s 500 Composite Stock Price Index (S&P 500), and the Philadelphia Oil Service Sector Index (PHLX Oil Service), assuming $100 invested in each stock or index on December 31, 2010, all dividends reinvested, and a fiscal year ending December 31. This information shall be deemed furnished, and not filed, in this Form 10-K and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934 as a result of this furnishing, except to the extent we specifically incorporate it by reference.
Dividend Policy
We have never paid cash dividends on our common stock. We currently intend to retain earnings to finance the growth and development of our business. Any payment of cash dividends in the future will depend upon our financial condition, capital requirements, and earnings, as well as other factors the Board of Directors may deem relevant. See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operation – Liquidity and Capital Resources” for a discussion of potential restrictions on our ability to pay dividends.
Purchases of Equity Securities by the Issuer and Affiliated Purchasers
In January 2004, our Board of Directors authorized the repurchase of up to $20 million of our common stock. Purchases may be made from time to time in open market transactions at prevailing market prices. The repurchase program may continue until the authorized limit is reached, at which time the Board of Directors may review the option of increasing the authorized limit. During 2004 through 2005, we repurchased 340,950 shares of our common stock pursuant to the repurchase program at a cost of approximately $5.7 million. There were no repurchases made during 2006 through 2015 pursuant to the repurchase program. Shares repurchased during the fourth quarter of 2015, other than pursuant to our repurchase program, are as follows:
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Period |  | Total Number of Shares Purchased |  |  |  | Average Price Paid per Share |  | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(1) |  | Maximum Number (or Approximate Dollar Value) of Shares that May Yet be Purchased Under the Publicly Announced Plans or Programs(1)
Oct 1 – Oct 31, 2015 |  | 380 |  |  | (2) |  | $ | 6.74 |  |  | — |  |  | $ | 14,327,000 |
Nov 1 – Nov 30, 2015 |  | 107 |  |  | (2) |  | 9.01 |  |  | — |  |  | 14,327,000 |
Dec 1 – Dec 31, 2015 |  | 19,131 |  |  | (2) |  | 8.58 |  |  | — |  |  | 14,327,000 |
Total |  | 19,618 |  |  |  |  |  |  |  | — |  |  | $ | 14,327,000 |

(1) | In January 2004, our Board of Directors authorized the repurchase of up to $20 million of our common stock. Purchases will be made from time to time in open market transactions at prevailing market prices. The repurchase program may continue until the authorized limit is reached, at which time the Board of Directors may review the option of increasing the authorized limit.

(2) | Shares we received in connection with the exercise of certain employee stock options or the vesting of certain employee restricted stock. These shares were not acquired pursuant to the stock repurchase program.

Item 6. Selected Financial Data.
The following tables set forth our selected consolidated financial data for the years ended December 31, 2015, 2014, 2013, 2012, and 2011. The selected consolidated financial data does not purport to be complete and should be read in conjunction with, and is qualified by, the more detailed information, including the Consolidated Financial Statements and related Notes and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operation” appearing elsewhere in this report. Please read “Item 1A. Risk Factors” beginning on page 14 for a discussion of the material uncertainties which might cause the selected consolidated financial data not to be indicative of our future financial condition or results of operations. During 2015 and 2014, we recorded significant impairments of long-lived assets and goodwill. During 2014 and 2013, we recorded significant charges to earnings associated with Maritech's decommissioning liabilities. During 2014, our Compression Division acquired CSI, and financed a portion of the $825.0 million purchase price through the issuance of additional common units of CSI Compressco LP and through the issuance of long-term debt. During 2012, our Production Testing Division acquired OPTIMA, ERS, and Greywolf. During 2011, Maritech sold approximately 95% of the oil and gas proved reserves it held as of December 31, 2010. These acquisitions, dispositions, and impairments significantly impact the comparison of our financial statements for 2015 to earlier years.
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|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013 |  | 2012 |  | 2011 |
|  | (In Thousands, Except Per Share Amounts)
Income Statement Data |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 1,130,145 |  |  | $ | 1,077,567 |  |  | $ | 909,398 |  |  | $ | 880,831 |  |  | $ | 845,275 |  |
Gross profit |  | 189,236 |  |  | 95,044 |  |  | 135,392 |  |  | 167,380 |  |  | 89,042 |  |
General and administrative expense |  | 157,812 |  |  | 142,689 |  |  | 131,466 |  |  | 131,649 |  |  | 111,805 |  |
Goodwill impairment |  | 177,006 |  |  | 64,295 |  |  | — |  |  | — |  |  | — |  |
Interest expense |  | 51,202 |  |  | 32,744 |  |  | 17,392 |  |  | 17,373 |  |  | 17,252 |  |
Interest income |  | (688 | ) |  | (746 | ) |  | (271 | ) |  | (293 | ) |  | (813 | ) |
Other (income) expense, net |  | 5,667 |  |  | 13,933 |  |  | (13,067 | ) |  | (9,532 | ) |  | (45,435 | ) |
Income (loss) before discontinued operations |  | (209,467 | ) |  | (167,575 | ) |  | 3,326 |  |  | 18,754 |  |  | 5,482 |  |
Net income (loss) |  | (209,467 | ) |  | (167,575 | ) |  | 3,325 |  |  | 18,757 |  |  | 5,418 |  |
Net income (loss) attributable to TETRA stockholders |  | $ | (126,183 | ) |  | $ | (169,678 | ) |  | $ | 153 |  |  | $ | 15,960 |  |  | $ | 4,147 |  |
Income (loss) per share, before discontinued operations attributable to TETRA stockholders |  | $ | (1.59 | ) |  | $ | (2.16 | ) |  | $ | — |  |  | $ | 0.21 |  |  | $ | 0.05 |  |
Average shares |  | 79,169 |  |  | 78,600 |  |  | 77,954 |  |  | 77,293 |  |  | 76,616 |  |
Income (loss) per diluted share, before discontinued operations attributable to TETRA stockholders |  | $ | (1.59 | ) |  | $ | (2.16 | ) |  | $ | — |  |  | $ | 0.20 |  |  | $ | 0.05 |  |
Average diluted shares |  | 79,169 |  | (1) | 78,600 |  | (2) | 78,840 |  | (3) | 77,963 |  | (4) | 77,991 |  | (5)

(1) | For the year ended December 31, 2015, the calculation of average diluted shares outstanding excludes the impact of all outstanding stock options, as the inclusion of these shares would have been antidilutive due to the net loss recorded during the year.

(2) | For the year ended December 31, 2014, the calculation of average diluted shares outstanding excludes the impact of all outstanding stock options, as the inclusion of these shares would have been antidilutive due to the net loss recorded during the year.

(3) | For the year ended December 31, 2013, the calculation of average diluted shares outstanding excludes the impact of 2,061,534 average outstanding stock options that would have been antidilutive.

(4) | For the year ended December 31, 2012, the calculation of average diluted shares outstanding excludes the impact of 2,832,192 average outstanding stock options that would have been antidilutive.

(5) | For the year ended December 31, 2011, the calculation of average diluted shares outstanding excludes the impact of 2,831,118 average outstanding stock options that would have been antidilutive

|  | December 31,
|  | 2015 |  | 2014 |  | 2013 |  | 2012 |  | 2011
|  | (In Thousands)
Balance Sheet Data |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Working capital |  | $ | 170,158 |  |  | $ | 121,999 |  |  | $ | 200,913 |  |  | $ | 178,294 |  |  | $ | 296,136 |
Total assets |  | 1,656,376 |  |  | 2,082,388 |  |  | 1,206,533 |  |  | 1,261,818 |  |  | 1,203,310 |
Long-term debt, net |  | 873,402 |  |  | 844,961 |  |  | 387,727 |  |  | 331,268 |  |  | 305,000 |
Decommissioning and other long-term liabilities |  | 83,548 |  |  | 93,366 |  |  | 48,282 |  |  | 80,427 |  |  | 96,857 |
Total equity |  | 514,180 |  |  | 765,601 |  |  | 597,498 |  |  | 593,308 |  |  | 569,088 |

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operation.
The following discussion is intended to analyze major elements of our consolidated financial statements and provide insight into important areas of management’s focus. This section should be read in conjunction with the Consolidated Financial Statements and the accompanying Notes included elsewhere in this Annual Report.
Statements in the following discussion may include forward-looking statements. These forward-looking statements involve risks and uncertainties. See “Item 1A. Risk Factors,” for additional discussion of these factors and risks.
Business Overview
Despite the declining demand for energy services during 2015, the August 2014 acquisition by our Compression Division of Compressor Systems, Inc. ("CSI") resulted in growth in consolidated revenues during 2015 compared to the prior year. The revenues of our Compression Division, primarily through CCLP, reflected growth during 2015 compared to the prior year, as the August 4, 2014, closing date of the acquisition of CSI (the "CSI Acquisition") resulted in a full year of activity during 2015 compared to approximately five months during the prior year. Increased offshore clear brine fluids ("CBF") and completion services activity, including from a customer project associated with a new completion fluids technology that was introduced during the first half of 2015, was more than offset by the decreased demand for onshore water management services and resulted in overall decreased revenues by the Fluids Division. Despite the decrease in revenues, Fluids Division gross profit increased, primarily due to improved margins associated with the mix of CBF products and services, particularly for offshore completion fluids products and services associated with our new completion fluid technology. The growth in consolidated revenues, which was a result of the August 2014 acquisition of CSI, occurred despite the continuing overall industry market challenges as a result of lower oil and natural gas commodity prices compared to early 2014. Oil and natural gas prices have weakened further in early 2016. The previous declines in commodity prices resulted in many of our customers reducing or suspending their near-term capital expenditure plans during 2015 and further reducing or suspending their near-term capital expenditures in 2016. Throughout the industry, drilling and completion activity continues to decrease, putting increased competitive pressure on several of our businesses. In addition to the decreased activity levels of the water management business of our Fluids Division, the current market environment has also negatively impacted our Production Testing and Offshore Services segments, as well as the low-horsepower production enhancement services operations and all compressor equipment sales operations of our Compression Division. As a result, during the fourth quarter of 2015, we recorded $221.2 million of impairment charges, primarily for our Compression and Production Testing Divisions, reflecting the decreased fair values of identified assets, including compression and other equipment, goodwill, and other intangible assets. In early 2016, we continue to respond aggressively to the current challenging industry environment with cost reduction actions for each of our businesses, which have included additional reductions in headcount, deferral of wage increases, wage reductions, renegotiation of vendor contracts, and other cost restructuring measures. These steps have resulted in improved profitability for certain of our businesses, particularly our Offshore Services segment, which reported increased profitability compared to the prior year period despite a significant decrease in revenues. As a result of the above factors, as well as from decreased Maritech excess decommissioning costs compared to the prior year period, 2015 consolidated gross profit increased 99.1% compared to the corresponding prior year period, with only a minimal increase in revenues.
Given the lower demand for certain of our products and services in the current oil and natural gas services market environment, the expected level of future consolidated operating cash flows, which we have historically used to fund our growth and liquidity needs, has become more uncertain. While remaining committed to a long-term growth strategy, our near-term focus during this period of reduced demand is to preserve and enhance liquidity through strategic operating and financial measures. In addition to cost structure rationalization and working capital management, we have also focused on capital structure enhancements designed to strengthen our consolidated balance sheet. On November 20, 2015, we issued and sold $125.0 million in aggregate principal amount of our 11.0% Senior Notes due November 5, 2022 (the “Series 2015 Senior Notes"), enabling us to pay the $25.0 million purchase price pursuant to a tender offer which commenced on November 5, 2015, (the “Tender Offer”) to purchase for cash up to $25.0 million aggregate principal amount of certain of our outstanding Series 2010-A Senior Notes and Series 2010-B Senior Notes (collectively, the “Series 2010 Senior Notes”), and to prepay in full all amounts owed in respect of the $90.0 million principal amount outstanding of our Series 2006-A Senior Notes due April 30, 2016. In addition, we entered into an amendment of the Senior Secured Note Purchase Agreement, resulting in the extension of the maturity date of the $50.0 million of our Senior Secured Notes due April 1, 2017 (the "Senior Secured Notes") issued thereunder from 2017 to 2019. As a result of these transactions, we have repaid and
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extended the maturity dates of a significant portion of TETRA's total long-term debt without significantly increasing the amount of TETRA's net borrowings. We believe the steps taken, including the cost reduction steps discussed above, have enhanced our capital structure and operating cash flows and will continue to enhance our operating cash flows in the future. As a result, we believe that, despite the current industry environment and activity levels, we and CCLP will have adequate liquidity to fund our operations and debt obligations and maintain compliance with debt covenants through December 31, 2016. However, we cannot predict how an extended period of low commodity prices will affect our operations and liquidity levels.
The following table provides condensed consolidating balance sheet information reflecting our net assets and CCLP's net assets that service our and its respective capital structures.

| December 31, 2015
Condensed Consolidating Balance Sheet | TETRA |  | CCLP |  | Eliminations |  | Consolidated
| (In Thousands)
Cash, excluding restricted cash | $ | 12,437 |  |  | $ | 10,620 |  |  | $ | — |  |  | $ | 23,057 |
Affiliate receivables | 8,153 |  |  | — |  |  | (8,153 | ) |  | — |
Other current assets | 216,767 |  |  | 115,580 |  |  |  |  | 332,347 |
Property, plant and equipment, net | 348,724 |  |  | 699,280 |  |  | — |  |  | 1,048,004 |
Other assets, including investment in CCLP | 157,193 |  |  | 154,970 |  |  | (59,195 | ) |  | 252,968 |
Total assets | $ | 743,274 |  |  | $ | 980,450 |  |  | $ | (67,348 | ) |  | $ | 1,656,376 |
Affiliate payables | $ | — |  |  | $ | 8,153 |  |  | $ | (8,153 | ) |  | $ | — |
Current portion of long-term debt | 50 |  |  | — |  |  | — |  |  | 50 |
Other current liabilities | 126,449 |  |  | 58,747 |  |  |  |  | 185,196 |
Long-term debt, net | 292,921 |  |  | 580,481 |  |  | — |  |  | 873,402 |
Other non-current liabilities | 82,637 |  |  | 911 |  |  |  |  |  | 83,548 |
Total equity | 241,217 |  |  | 332,158 |  |  | (59,195 | ) |  | 514,180 |
Total liabilities and equity | $ | 743,274 |  |  | $ | 980,450 |  |  | $ | (67,348 | ) |  | $ | 1,656,376 |

TETRA’s debt is serviced by our existing cash balances and cash provided from operating activities (excluding CCLP) and the distributions we receive from CCLP in excess of our cash capital expenditures (excluding CCLP). During the year ended December 31, 2015, consolidated cash provided from operating activities was $196.0 million, which included approximately $101.9 million generated by CCLP. Our cash provided from operating activities is reduced by the amount we spent on Maritech decommissioning liabilities, which was $10.3 million during the year ended December 31, 2015. During 2015, we received $30.5 million from CCLP as our share of CCLP distributions.
Our consolidated operating cash flows during the year ended December 31, 2015, increased to $196.0 million, an increase of $87.3 million, or 80.4%, over the prior year. These increased consolidated operating cash flows during 2015 not only reflect the acquisition of CSI, but also the impact of the cost reduction steps noted above and the increased cash flows generated by certain of our businesses. Consolidated capital expenditures were $120.6 million (including $95.3 million by our Compression Division) during the year ended December 31, 2015, compared to $131.6 million of consolidated capital expenditures (including $48.1 million by our Compression Division) during the prior year. Compression Division capital expenditures during 2015 primarily relate to the expansion of its over 100-horsepower compressor package service fleet, but are expected to decrease significantly going forward as the demand for compression services has decreased in the current market environment. Excluding the 2015 growth in Compression Division capital expenditures, our capital expenditure levels reflect our continuing efforts to defer or reduce capital expenditure projects in the current market environment. Key objectives associated with our separate capital structure (excluding the capital structure of CCLP) include the ongoing management of amounts outstanding and available under our bank revolving credit facility and repayment of our Senior Notes. CCLP plans to continue monitoring demand levels for its compression products and services in the current environment and consider additional cost reductions, capital expenditure deferrals, and other steps to conserve liquidity. TETRA's future consolidated operating cash flows will also be affected by the continuing challenges associated with extinguishing the remaining Maritech asset retirement obligations. The amount of
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recorded liability for these remaining obligations is approximately $48.4 million as of December 31, 2015. Approximately $14.6 million of this amount is expected to be performed during the twelve month period ending December 31, 2016, with the timing of a portion of this work being discretionary.
Future demand for our products and services depends primarily on activity in the oil and natural gas exploration and production industry, particularly including the level of expenditures for the exploration and production of oil and natural gas reserves, natural gas compression infrastructure, and for the plugging and decommissioning of abandoned offshore oil and natural gas properties. The future growth of certain of our businesses is dependent on improved future pricing levels of oil and natural gas. When oil and natural gas prices increase, we believe that there are growth opportunities for our products and services, supported primarily by:

• | increases in technologically driven deepwater oil and gas well completions in the Gulf of Mexico;

• | applications for many of our products and services in the continuing exploitation and development of shale reservoirs;

• | increased regulatory requirements governing the abandonment and decommissioning work on aging offshore platforms and wells in the Gulf of Mexico; and

• | increases in selected international oil and gas exploration and development activities.

Our Fluids Division generates revenues and cash flows by manufacturing and marketing clear brine fluids ("CBFs"), additives, and associated products and services to the oil and gas industry for use in well drilling, completion, and workover operations in the United States and in certain countries in Latin America, Europe, Asia, the Middle East, and Africa. The Fluids Division also markets liquid and dry calcium chloride products manufactured at its production facilities or purchased from third-party suppliers to a variety of markets outside the energy industry. The Fluids Division also provides domestic onshore oil and gas operators with a wide variety of water management services. Fluids Division revenues decreased $13.3 million during 2015 compared to 2014, primarily due to reduced water management services revenues, reflecting the decreased activity levels in shale reservoir markets as a result of lower oil and natural gas prices compared to the prior year. The Fluids water management business is dependent upon domestic drilling activity, particularly in unconventional shale gas and oil reservoirs. North American onshore rig counts decreased significantly during 2015 and remain low in early 2016 as a result of current oil and natural gas pricing. Partially offsetting these decreased water management service revenues, Fluids Division revenues increased during 2015 from increased CBF and associated product sales and services revenues from U.S. Gulf of Mexico well completion projects primarily for a single customer using new completion fluid technology introduced earlier in 2015. Although demand for the Fluids Division’s CBF products is driven primarily by completion activity rather than drilling activity, the Gulf of Mexico rig count is a useful indicator of future demand for offshore CBF products. The Gulf of Mexico rig count dropped during 2015 as a result of low oil and natural gas prices and remains low in early 2016. Demand for certain of the Fluids Division's products and services, particularly for its manufactured products and for its CBF products in offshore and international markets, has been less affected by current low oil and natural gas prices than has the onshore operations. The Fluids Division has also been negatively affected by regulatory restrictions in the past and may continue to be affected by future regulatory restrictions.
Our Production Testing Division generates revenues and cash flows by performing frac flowback, production well testing, offshore rig cooling, early production, and other associated services and products. The primary markets served by the Production Testing Division include many of the major oil and gas producing regions in the United States, Mexico, and Canada, as well as in oil and gas basins in certain regions in South America, Africa, Europe, the Middle East, and Australia. The Production Testing Division’s production testing operations are generally driven by the demand for natural gas and oil and the resulting levels of drilling and completion activities in the markets that the Production Testing Division serves. Many of the markets served by the Production Testing Division are characterized by high lifting costs for oil and natural gas, such as in certain unconventional shale gas and oil reservoirs and located in certain basins in the U.S., Canada, and certain other international markets. As a result of decreased oil and natural gas commodity prices, and the corresponding declines in the drilling and capital expenditures and plans of its customers, Production Testing activity levels have declined, particularly in certain markets in which it operates that are characterized by higher lifting costs. The Production Testing segment’s revenues decreased by $58.9 million in 2015 compared to 2014, due to decreased overall market activity. The impact of decreased oil and natural gas pricing has negatively impacted demand for services in each of our areas of operations, including certain shale reservoir markets that were a source of revenue growth during the past several years. Increased competition for decreased industry activity negatively affected pricing levels for services, although the Division has successfully expanded its domestic customer base compared to the prior year. As a result of the continued decline in oil and natural gas prices, many of the Production Testing Division's customers have
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announced further reductions or suspensions of their drilling and capital expenditure plans for 2016 and these actions are expected to further reduce demand for services.
Our Compression Division generates revenues and cash flows by providing compression services and equipment for natural gas and oil production, gathering, transportation, processing, and storage. The Compression Division's equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield fluid pump systems designed and fabricated by the Compression Division's facilities as well as the sale of compressor package parts and components manufactured by third-party suppliers. The Compression Division's aftermarket services business provides compressor package operations, reconfiguration, and maintenance services. The Compression Division provides its services and equipment to a broad base of natural gas and oil exploration and production, midstream, transmission, and storage companies operating throughout many of the onshore producing regions of the United States and in a number of foreign countries, including Mexico, Canada and Argentina. Compression Division revenues increased $175.1 million in 2015 as compared to 2014, primarily attributable to a full twelve months of impact from CSI's operations in the current year compared to approximately five months of activity in the prior year due to the August 4, 2014, acquisition of CSI, by which the Compression Division significantly expanded its scope of operations. Compression Division revenues, particularly for sales of compressor packages, have decreased during the last half of 2015 due to reduced customer demand, as also reflected by the current reduced customer fabrication backlog for CSI compressor packages. Compression Division service revenues have also been negatively affected by current low oil and natural gas pricing, resulting in decreased demand for low-horsepower compression services in liquids-rich and dry gas markets. However, utilization of mid- and high-horsepower compressor packages has been less impacted by current oil and natural gas pricing. The decrease in demand for new compressor sales and low-horsepower compression services, due to reduced oil and natural gas prices, is expected to continue going forward until such commodity pricing improves.
Our Offshore Division consists of two operating segments: Offshore Services and Maritech. The Offshore Services segment generates revenues and cash flows by performing (1) downhole and subsea services such as oil and gas well plugging and abandonment and workover services, (2) decommissioning and certain construction services utilizing heavy lift barges and various cutting technologies with regard to offshore oil and gas production platforms and pipelines, and (3) conventional and saturated diving services. The services provided by the Offshore Services segment are marketed to offshore operators, primarily in the U.S. Gulf of Mexico. Gulf of Mexico platform decommissioning and well abandonment activity levels are driven primarily by BSEE regulations; the declining production levels of producing fields; the age of production platforms and other structures; oil and natural gas commodity prices; sales activity of mature oil and gas producing properties; and overall oil and gas company activity levels. Offshore Services revenues decreased by $73.2 million during 2015 compared to 2014, due to the continuing challenges in the U.S. Gulf of Mexico market, including decreased diving, heavy lift, and abandonment services activity, customer project delays, and pricing pressures. A portion of the decreased revenues during 2015 compared to 2014 was due to decreased decommissioning and abandonment work performed for Maritech, and we expect that this decreased Maritech activity will continue in 2016. Revenues for work performed for Maritech are eliminated in consolidation. The Offshore Services segment is focused on replacing work performed for Maritech with work for third party customers; however, demand for services in 2015 and projected work for 2016 reflects the impact of increased competition and the impact of reduced customer activity resulting from decreased oil and natural gas prices.
The sale of substantially all of Maritech’s oil and gas producing properties during 2011 and 2012 has essentially removed us from the oil and gas exploration and production business. Maritech’s revenues are minimal and are expected to continue to be minimal going forward. Maritech’s current operations primarily consist of the ongoing plugging, abandonment, and decommissioning associated with its remaining offshore wells, facilities, and production platforms.
Critical Accounting Policies and Estimates
This discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements. We prepared these financial statements in conformity with United States generally accepted accounting principles. In preparing our consolidated financial statements, we make assumptions, estimates, and judgments that affect the amounts reported. We base these estimates on historical experience, available information, and various other assumptions that we believe are reasonable. We periodically evaluate these estimates and judgments, including those related to potential impairments of long-lived assets (including goodwill), the collectability of accounts receivable, and the current cost of future abandonment and
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decommissioning obligations. “Note B – Summary of Significant Accounting Policies” to the Consolidated Financial Statements contains the accounting policies governing each of these matters. The fair values of portions of our total assets and liabilities are measured using significant unobservable inputs. The combination of these factors forms the basis for our judgments made about the carrying values of assets and liabilities that are not readily apparent from other sources. These judgments and estimates may change as new events occur, as new information is acquired, and as changes in our operating environment are encountered. Actual results are likely to differ from our current estimates, and those differences may be material. The following critical accounting policies reflect the most significant judgments and estimates used in the preparation of our financial statements.
Impairment of Long-Lived Assets
The determination of impairment of long-lived assets, including identified intangible assets, is conducted periodically whenever indicators of impairment are present. If such indicators are present, the determination of the amount of impairment is based on our judgments as to the future operating cash flows to be generated from these assets throughout their estimated useful lives. If an impairment of a long-lived asset is warranted, we estimate the fair value of the asset based on a present value of these cash flows or the value that could be realized from disposing of the asset in a transaction between market participants. The oil and gas industry is cyclical, and our estimates of the amount of future cash flows, the period over which these estimated future cash flows will be generated, as well as the fair value of an impaired asset, are imprecise. Our failure to accurately estimate these future operating cash flows or fair values could result in certain long-lived assets being overstated, which could result in impairment charges in periods subsequent to the time in which the impairment indicators were first present. Alternatively, if our estimates of future operating cash flows or fair values are understated, impairments might be recognized unnecessarily or in excess of the appropriate amounts. During 2015, primarily as a result of the significant decrease in oil and natural gas prices, we recorded consolidated long-lived asset impairments of $44.2 million. During periods of economic uncertainty, the likelihood of additional material impairments of long-lived assets is higher due to the possibility of decreased demand for our products and services.
Impairment of Goodwill
The impairment of goodwill is also assessed whenever impairment indicators are present, but not less than once annually. The annual assessment for goodwill impairment begins with a qualitative assessment of whether it is “more likely than not” that the fair value of each reporting unit is less than its carrying value. This qualitative assessment requires the evaluation, based on the weight of evidence, of the significance of all identified events and circumstances for each reporting unit. Based on this qualitative assessment, we determined that due to the significant decrease in oil and natural gas commodity prices and the resulting expected negative impact on demand for the products and services for each of our reporting units, it was “more likely than not” that the fair value of certain of our reporting units were less than their carrying values as of December 31, 2015. When the qualitative analysis indicates that it is “more likely than not” that a reporting unit’s fair value is less than its carrying value, the resulting goodwill impairment test consists of a two-step accounting test performed on a reporting unit basis. The first step of the impairment test is to compare the estimated fair value with the recorded net book value (including goodwill) of our reporting units. If the estimated fair value is higher than the recorded net book value, no impairment is deemed to exist and no further testing is required. If, however, the carrying amount of the reporting unit exceeds its estimated fair value, an impairment loss is calculated by comparing the carrying amount of the reporting unit’s goodwill to our estimated implied fair value of that goodwill. Our estimates of reporting unit fair value, if required, are based on a combination of an income and market approach. These estimates are imprecise and are subject to our estimates of the future cash flows of each business and our judgment as to how these estimated cash flows translate into each business’ estimated fair value. These estimates and judgments are affected by numerous factors, including the general economic environment at the time of our assessment, which affects our overall market capitalization. If we overestimate the fair value of our reporting units, the balance of our goodwill asset may be overstated. Alternatively, if our estimated reporting unit fair values are understated, impairments might be recognized unnecessarily or in excess of the appropriate amounts.
Throughout 2015, and particularly during the last half of the year, lower oil and natural gas commodity prices have resulted in a decreased demand for many of the products and services of each of our reporting units. Specifically to our Compression Division, demand for low-horsepower wellhead compression services and for sales of compressor equipment have decreased significantly and are expected to continue to be decreased for the foreseeable future. Accordingly, the fair value for the Compression Division reporting unit, including the market capitalization for CCLP, was less than its carrying value as of December 31, 2015. For our Production Testing
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Division reporting unit, demand for production testing services has decreased in each of the market areas in which we operate, resulting in decreased estimated future cash flows. As a result, the fair value of the Production Testing reporting unit was also less than its carrying value as of December 31, 2015. As part of our internal annual business outlook for each of our reporting units that we perform during each fourth quarter, we considered changes in the global economic environment that affected the equity prices and market capitalizations of TETRA and CCLP. As part of the first step of goodwill impairment testing, we updated our assessment of the future cash flows for each of our reporting units, applying expected long-term growth rates, discount rates, and terminal values that we consider reasonable for each reporting unit. Our Maritech and Offshore Services reporting units are excluded, because they do not contain goodwill. We have calculated a present value of the respective cash flows for each of the other reporting units to arrive at an estimate of fair value under the income approach and then used the market approach to corroborate these values. Based on these assumptions, we determined that the fair value of our Fluids Division was significantly in excess of its carrying value, which includes approximately $6.6 million of goodwill.
After making the hypothetical purchase price adjustments as part of the second step of the goodwill impairment test, there was $92.4 million residual purchase price to be allocated to the goodwill of the Compression reporting unit and approximately $13.9 million residual purchase price to be allocated to the goodwill of the Production Testing reporting unit. Based on this analysis, we concluded that an impairment of $139.4 million of the $233.6 million of recorded goodwill for Compression and an impairment of $37.6 million of the $51.5 million of recorded goodwill for Production Testing was required.
Specific uncertainties affecting the estimated fair values of our Compression and Production Testing reporting units include the impact of competition, the trading prices of our common stock and the common units of CCLP, the price of oil and natural gas, future overall activity levels in the regions in which we operate, the activity levels of our significant customers, and other factors affecting the rate of future growth of these reporting units. These factors will continue to be reviewed and assessed during future periods. Negative developments with regard to these factors could have further negative effects on the fair values of our Compression and Production Testing reporting units and could result in future additional impairments of goodwill. Subsequent to December 31, 2015, and as of March 3, 2016, the prices of our common stock and the common units of CCLP have continued to decline, and as a result future additional impairments are possible.
Maritech Decommissioning Liabilities
Maritech records a liability associated with the costs of abandoning and decommissioning the wells, platforms, and pipelines located on its oil and gas leases, as well as removing associated debris. Maritech’s decommissioning liabilities are established based on what Maritech estimates a third party would charge to perform these services. These well abandonment and decommissioning liabilities (referred to as decommissioning liabilities) are recorded net of amounts allocable to joint interest owners. In estimating the decommissioning liabilities, we perform detailed estimating procedures, analysis, and engineering studies. Whenever practical, Maritech settles these decommissioning liabilities by utilizing the services of its affiliated companies to perform well abandonment and decommissioning work. This practice saves us the profit margin that a third party would charge for such services. When these services are performed by an affiliated company, all recorded intercompany revenues are eliminated in the consolidated financial statements. Any difference between our own internal costs to settle the decommissioning liability and the recorded liability is recognized in the period in which we perform the work. The recorded decommissioning liability associated with a specific property is fully extinguished when the property is completely abandoned. Once a Maritech well abandonment and decommissioning project is performed, any remaining decommissioning liability in excess of the actual cost of the work performed is recorded as a gain and is included in earnings in the period in which the project is completed. Conversely, estimated or actual costs in excess of the decommissioning liability are charged against earnings in the period in which the work is estimated or performed.
We review the adequacy of our decommissioning liabilities whenever indicators suggest that either the amount or timing of the estimated cash flows underlying the liabilities have changed materially. The amount of cash flows necessary to abandon and decommission the property is subject to changes due to seasonal demand, increased demand following hurricanes, regulatory changes, and other general changes in the energy industry environment. Accordingly, the estimation of our decommissioning liabilities is imprecise. Asset retirement obligations are recorded in accordance with Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 410, whereby the estimated fair value of a liability for asset retirement obligations is recorded in the period in which it is incurred and in which a reasonable estimate can be made. Such estimates are based on relevant assumptions that we believe are reasonable. The cost estimates for Maritech asset retirement obligations are
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considered reasonable estimates consistent with market conditions at the time they are made, and we believe they reflect the amount of work legally obligated to be performed in accordance with BSEE standards, as revised from time to time.
During each of the three years ended December 31, 2015, Maritech adjusted its decommissioning liabilities as a result of increased estimates, as well as the actual cost of significant abandonment and decommissioning work performed during each of those years. Maritech recorded approximately $150.7 million of excess decommissioning expense during the three years ended December 31, 2015, associated with work performed or to be performed on its oil and gas properties. The actual cost of performing Maritech’s well abandonment and decommissioning work has often exceeded Maritech's initial estimate of these decommissioning liabilities and has resulted in charges to earnings in the period the work is performed or when the additional liability is determined. To the extent our decommissioning liabilities are understated, additional charges to earnings may be required in future periods.
Revenue Recognition
We generate revenue on certain well abandonment, decommissioning, and dive services projects under contracts which are typically of short duration and that provide for either lump-sum charges or specific time, material, and equipment charges, which are billed in accordance with the terms of such contracts. We generally recognize revenue once the following four criteria are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been provided; (3) the sales price is fixed or determinable; and (4) collectability is reasonably assured.
With regard to longer-term lump sum contracts, revenue is recognized using the percentage-of-completion method based on the ratio of costs incurred to total estimated costs at completion. The estimation of total costs to be incurred may be imprecise due to unexpected well conditions, delays, weather, and other uncertainties. Inaccurate cost estimates may result in the revenue associated with a specific contract being recognized in an inappropriate period. Total project revenue and cost estimates for lump sum contracts are reviewed periodically, but at least quarterly, as work progresses, and adjustments are reflected in the period in which such estimates are revised. Provisions for estimated losses on such contracts are made in full in the period such losses are determined. Despite the uncertainties associated with estimating the total contract cost, our recognition of revenue associated with these contracts has historically been reasonable.
Occasionally, our Offshore Services segment is a party to project management contracts which contain multiple deliverables, including the performance of service milestones. While the contract provides contract-determined values associated with each milestone, the recognition of revenue is determined based on the realized market values received by the customer. The determination of realized market values is supported by objective evidence whenever possible, but may also be determined based on our judgments as to the value of a particular deliverable.
The majority of our compression services are provided pursuant to contract terms ranging from one month to twenty-four months. Collections associated with progressive billings to customers for the construction of compression equipment are generally included in unearned income in the consolidated balance sheets until such time as the equipment is delivered.
Income Taxes
We are a U.S. company and are subject to income taxes in the U.S. We also operate in a number of countries under many legal forms. Our operations are taxed on various bases, including actual income before taxes, deemed profits (which are generally determined using a percentage of revenue rather than profits) and withholding taxes based on revenue. Determination of taxable income in any jurisdiction requires the interpretation of the applicable tax laws and regulations and the use of estimates and assumptions regarding significant future events such as the amount, timing, and character of deductions, permissible revenue recognition methods under the applicable tax laws, and the sources and character of income and tax credits.
We provide for income taxes by taking into account the differences between the financial statement treatment and tax treatment of certain transactions. Deferred tax assets and liabilities are recognized for the anticipated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis amounts. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary
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differences are expected to be recovered or settled. The effect of a change in tax rates is recognized as income or expense in the period that includes the enactment date. Management must make certain assumptions regarding whether tax differences are permanent or temporary and must estimate the timing of their reversal, and whether taxable operating income in future periods will be sufficient to fully recognize any gross deferred tax assets.
We establish valuation allowances to reduce deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. In determining the need for valuation allowances, management has considered and made judgments and estimates regarding estimated future taxable income and ongoing prudent and feasible tax planning strategies. Changes in state, federal, and foreign tax laws, as well as changes in our financial condition, could affect these estimates.
In addition, we maintain liabilities for estimated tax exposures and uncertainties in jurisdictions where we operate. The annual tax provision includes the impact of income tax provisions and benefits for changes to liabilities that we consider appropriate, as well as related interest and penalties. We consider many factors when evaluating and estimating income tax uncertainties. These factors include an evaluation of the technical merits of the tax position as well as the amounts and probabilities of the outcomes that could be realized upon ultimate settlement. The actual resolution of those uncertainties will inevitably differ from those estimates, and such differences may be material to the financial statements. We believe that an appropriate liability has been established for the estimated exposures associated with these uncertainties under the guidance in ASC 740 “Income Taxes.” However, the actual resolution of those uncertainties will inevitably differ from those estimates, and such differences may be material to our consolidated financial statements.
Acquisition Purchase Price Allocations
We account for acquisitions of businesses using the purchase method, which requires the allocation of the purchase price based on the fair values of the assets and liabilities acquired. We estimate the fair values of the assets and liabilities acquired using accepted valuation methods, and, in many cases, such estimates are based on our judgments as to the future operating cash flows expected to be generated from the acquired assets throughout their estimated useful lives. We have completed several acquisitions during the past several years and have accounted for the various assets (including intangible assets) and liabilities acquired based on our estimate of fair values. Goodwill represents the excess of acquisition purchase price over the estimated fair values of the net assets acquired. Our estimates and judgments of the fair value of acquired businesses are imprecise, and the use of inaccurate fair value estimates could result in the improper allocation of the acquisition purchase price to acquired assets and liabilities, which could result in asset impairments, the recording of previously unrecorded liabilities, and other financial statement adjustments. The difficulty in estimating the fair values of acquired assets and liabilities is increased during periods of economic uncertainty.
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Results of Operations
The following data should be read in conjunction with the Consolidated Financial Statements and the associated Notes contained elsewhere in this report.
2015 Compared to 2014
Consolidated Comparisons

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 1,130,145 |  |  | $ | 1,077,567 |  |  | $ | 52,578 |  |  | 4.9 | %
Gross profit |  | 189,236 |  |  | 95,044 |  |  | 94,192 |  |  | 99.1 | %
Gross profit as a percentage of revenue |  | 16.7 | % |  | 8.8 | % |  |  |  |  |  |
General and administrative expense |  | 157,812 |  |  | 142,689 |  |  | 15,123 |  |  | 10.6 | %
General and administrative expense as a percentage of revenue |  | 14.0 | % |  | 13.2 | % |  |  |  |  |
Goodwill impairment |  | 177,006 |  |  | 64,295 |  |  | 112,711 |  |  |
Interest expense, net |  | 50,514 |  |  | 31,998 |  |  | 18,516 |  |  |  |
(Gain) loss on sale of assets |  | (4,375 | ) |  | (11 | ) |  | (4,364 | ) |  |  |
Other (income) expense, net |  | 10,042 |  |  | 13,944 |  |  | (3,902 | ) |  |  |
Income (loss) before taxes and discontinued operations |  | (201,763 | ) |  | (157,871 | ) |  | (43,892 | ) |  |  |
Income (loss) before taxes and discontinued operations as a percentage of revenue |  | (17.9 | )% |  | (14.7 | )% |  |  |  |  |  |
Provision (benefit) for income taxes |  | 7,704 |  |  | 9,704 |  |  | (2,000 | ) |  |  |
Income (loss) before discontinued operations |  | (209,467 | ) |  | (167,575 | ) |  | (41,892 | ) |  |  |
Income (loss) from discontinued operations, net of taxes |  | — |  |  | — |  |  | — |  |  |  |
Net income (loss) |  | (209,467 | ) |  | (167,575 | ) |  | (41,892 | ) |  |  |
Net (income) loss attributable to noncontrolling interest |  | 83,284 |  |  | (2,103 | ) |  | 85,387 |  |  |  |
Net income (loss) attributable to TETRA stockholders |  | $ | (126,183 | ) |  | $ | (169,678 | ) |  | $ | 43,495 |  |  |  |

Consolidated revenues during 2015 increased compared to the prior year due to increased revenues for the Compression Division as a result of the CSI Acquisition. The impact of the CSI Acquisition, which resulted in the increased Compression Division revenues of approximately $175.1 million during 2015, greatly expanded the Division's operations, allowing it to participate in the compression market at a broader level. Each of our other segments reported decreased revenues, due to the impact of reduced oil and natural gas prices and the corresponding decrease in industry activity levels. Fluids Division revenues decreased, as decreased onshore water management services and manufactured product sales revenues more than offset the increased offshore completion services and CBF product sales revenues. Our Production Testing and Offshore Services segments reported significantly decreased revenues during the current year, primarily due to the impact of decreased industry demand and activity levels in each of the domestic and international markets we serve, largely caused by decreased oil and natural gas prices. See Divisional Comparisons section below for additional discussion.
Consolidated gross profit increased during the current year compared to the prior year, primarily due to the results of our Fluids and Offshore Services segments. The increase in Fluids Division gross profit was primarily due to the mix of CBF products and services, particularly for U.S. Gulf of Mexico completion fluids products and services and increased profitability from our manufactured products operations. Our Offshore Services segment reflected gross profit compared to a gross loss in the prior year, despite decreased revenues, largely as a result of cost reductions and efficiencies implemented in response to decreased activity levels, as well as due to significant impairments recorded during the prior year. Maritech had a reduced gross loss compared to the prior year due to decreased excess decommissioning costs during the current year. These increases in profitability were partially offset by the decreased profitability of our Production Testing and Compression Divisions compared to the prior
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year, as a result of a significant decrease in revenues and activity levels, as well as increased impairments of long-lived assets during 2015.
Consolidated general and administrative expenses increased during the current year compared to the prior year due to the increase in Compression Division and Corporate Overhead administrative costs and despite cost reduction efforts. Compression Division administrative costs increased following the CSI Acquisition, despite approximately $8.7 million of transaction costs in the prior year, primarily related to the CSI Acquisition. In addition, Corporate Overhead administrative expenses also increased, primarily due to increased incentive and equity compensation. The increase in the Compression Division and Corporate Overhead general and administrative expenses was partially offset by decreased administrative costs for our Fluids, Production Testing, and Offshore Divisions, primarily as a result of cost reduction efforts by these segments.
Following the fourth quarter of 2015, we performed an annual test of goodwill impairment in accordance with the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 350-20 "Goodwill." The continuing decline in oil and natural gas commodity prices has had, and is expected to have, a continuing negative impact on industry drilling and capital expenditure activity, which affects the expected future demand for products and services of each of our reporting units. Specifically, demand for Compression Division's low-horsepower wellhead compression services and for sales of compressor equipment have decreased significantly and are expected to continue to be decreased for the foreseeable future. Demand for our Production Testing Division's services has also decreased as a result of decreased drilling and completion activity. This expected decreased demand, along with the decrease in the common unit price of our CCLP subsidiary, has also caused an overall reduction in the fair values of each of our reporting units, particularly our Compression and Production Testing reporting units. As part of the test of goodwill impairment, we have estimated the fair value of each of our reporting units, and have determined, based on these estimated values, that impairments of the goodwill of our Compression and Production Testing reporting units were necessary, primarily due to the market factors discussed above. Accordingly, during the fourth quarter of 2015, we recorded total impairment charges of $177.0 million associated with the goodwill of these reporting units.
Consolidated interest expense increased due to increased borrowings, primarily from the increased borrowings by the Compression Division, through CCLP, primarily due to the CSI Acquisition. Consolidated interest expense levels going forward are expected to increase compared to the prior year periods as a result of the increased interest rate associated with the Series 2015 Senior Notes, which were issued in November 2015, and from increased CCLP borrowings associated with CCLP 2015 capital expenditure activity.
Consolidated other expense was $10.0 million during the current year compared to $13.9 million during the prior year. Other expense during the prior year includes $9.3 million of interim financing costs that were expensed in connection with the CSI Acquisition. Also included in net other expense during the prior year was a $5.7 million gain associated with the acquisition of the interest in TETRA Arabia that we did not previously own, partially offset by a $2.9 million charge associated with the settlement of the pre-existing relationship with the other shareholder during the prior year period. Other expense during the current year includes a $1.6 million "make-whole" prepayment premium associated with the early repayment of the Series 2006-A Senior Notes, and increased Compression Division financing cost amortization as a result of the financing for the CSI Acquisition.
Despite the significant pre-tax loss for the year ended December 31, 2015, we recorded a provision for income tax during the year. Our 2015 effective tax rate of negative 3.8% was primarily a result of losses generated in entities for which no related tax benefit has been recorded. The losses generated by these entities do not result in tax benefits due to offsetting valuation allowances being recorded against their net deferred tax assets. We establish a valuation allowance to reduce the deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. Further, the effective tax rate is impacted by the nondeductible portion of our goodwill impairments during 2015.
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Divisional Comparisons
Fluids Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 424,046 |  |  | $ | 437,362 |  |  | $ | (13,316 | ) |  | (3.0 | )%
Gross profit |  | 111,969 |  |  | 97,806 |  |  | 14,163 |  |  | 14.5 | %
Gross profit as a percentage of revenue |  | 26.4 | % |  | 22.4 | % |  |  |  |  |  |
General and administrative expense |  | 32,576 |  |  | 35,625 |  |  | (3,049 | ) |  | (8.6 | )%
General and administrative expense as a percentage of revenue |  | 7.7 | % |  | 8.1 | % |  |  |  |  |  |
Interest (income) expense, net |  | (258 | ) |  | (250 | ) |  | (8 | ) |  |  |
Other (income) expense, net |  | (1,140 | ) |  | (2,274 | ) |  | 1,134 |  |  |  |
Income before taxes and discontinued operations |  | $ | 80,791 |  |  | $ | 64,705 |  |  | $ | 16,086 |  |  | 24.9 | %
Income before taxes and discontinued operations as a percentage of revenue |  | 19.1 | % |  | 14.8 | % |  |  |  |  |  |

Fluids Division revenues decreased during 2015 compared to the prior year as approximately $24.7 million of decreased services revenues was partially offset by $11.4 million of increased product sales revenues. Fluids Division service revenues decreased due to reduced onshore water management services revenues, reflecting the decreased activity levels in shale reservoir markets as a result of lower oil and natural gas prices compared to the prior year. Partially offsetting these decreased service revenues, offshore U.S. Gulf of Mexico completion services revenues increased due to well completion projects for a single customer using a new completion fluid technology introduced during 2015. The increase in product sales revenues was primarily attributable to increased CBF and associated product sales revenues, including the U.S. Gulf of Mexico well completion projects for a single customer using the new completion fluid technology discussed above. In addition, Fluids Division product sales revenues increased from market share gains for domestic offshore CBF and associated products. This increase in domestic offshore CBF and associated product sales revenues more than offset decreased international revenues from sales of CBF products and manufactured products.
Fluids Division gross profit increased during the current year compared to the prior year, despite decreased revenue, primarily due to improved margins associated with the mix of CBF products and services, particularly for offshore completion fluids products and services associated with the new completion fluid technology projects discussed above. Manufactured products gross profit also increased, partially due to $2.6 million of insurance claim proceeds received and credited to earnings during the current year. Cost reduction efforts also contributed to the improved gross profit during the current year compared to the prior year.
Fluids Division income before taxes increased during the current year compared to the prior year, primarily due to the increased gross profit discussed above. Decreased Fluids Division other income was more than offset by decreased Fluids Division general and administrative costs due to administrative cost reductions, primarily associated with the decreased water management operations. Other income decreased due to a $2.7 million allocated portion of the remeasurement gain recorded in the prior year from our January 2014 acquisition of the remaining interest in TETRA Arabia from the fair value measurement of our previous investment in TETRA Arabia. No such gain was recorded in the current year, resulting in the decrease in other income.
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Production Testing Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 133,904 |  |  | $ | 192,824 |  |  | $ | (58,920 | ) |  | (30.6 | )%
Gross profit (loss) |  | (3,046 | ) |  | 12,610 |  |  | (15,656 | ) |  | (124.2 | )%
Gross profit (loss) as a percentage of revenue |  | (2.3 | )% |  | 6.5 | % |  |  |  |  |  |
General and administrative expense |  | 17,726 |  |  | 20,512 |  |  | (2,786 | ) |  | (13.6 | )%
General and administrative expense as a percentage of revenue |  | 13.2 | % |  | 10.6 | % |  |  |  |  |  |
Goodwill impairment |  | 37,562 |  |  | 60,358 |  |  | (22,796 | ) |  |  |
Interest (income) expense, net |  | (89 | ) |  | (31 | ) |  | (58 | ) |  |  |
Other (income) expense, net |  | (2,525 | ) |  | (2,061 | ) |  | (464 | ) |  |  |
Loss before taxes and discontinued operations |  | $ | (55,720 | ) |  | $ | (66,168 | ) |  | $ | 10,448 |  |  | 15.8 | %
Loss before taxes and discontinued operations as a percentage of revenue |  | (41.6 | )% |  | (34.3 | )% |  |  |  |  |  |

Production Testing Division revenues decreased during 2015 compared to the prior year due to decreased overall market activity. Production Testing service revenues decreased approximately $66.0 million during the current year compared to the prior year, as the impact of decreased oil and natural gas pricing has negatively impacted demand for services in each of our areas of operations, including certain shale reservoir markets that were a source of revenue growth during the past several years. Increased competition for decreased market activity negatively affected pricing levels for services, although the Division has successfully expanded its domestic customer base compared to the prior year. Decreased service revenues were partially offset by approximately $7.1 million of product sales revenues generated from the sale of equipment during the current year.
Production Testing Division reported a gross loss during the current year compared to a gross profit during the prior year due to the market conditions discussed above, including the negative impact of increased competition on pricing. Impairments of long-lived assets totaled approximately $12.3 million during the current year compared to $14.5 million of impairments recorded during the prior year. These impairments were recorded for certain operating equipment due to expected decreased utilization, demand, and future cash flows. The current year gross loss occurred despite the impact of cost reduction efforts, which have included downsized field operations, headcount reductions, deferrals of wage increases, and other steps to adjust the Production Testing Division's cost structure in light of the current market conditions. In response to expected future decreased activity levels, we continue to review and implement additional cost reduction steps.
Production Testing Division reported a decreased pretax loss compared to the prior year, primarily due to the decreased impairment of goodwill compared to the prior year. We account for goodwill in accordance with ASC 350-20, and the impairments of goodwill reflect the significant decreases in future profitability and cash flows expected in the current market environment. The Production Testing Division general and administrative expenses decreased during the current year due to the impact of administrative cost reductions, which were partially offset by $3.3 million of increased bad debt expense. Other income increased due to increased gains on sales of assets, partly offset by increased foreign currency losses.
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Compression Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 457,639 |  |  | $ | 282,505 |  |  | $ | 175,134 |  |  | 62.0 | %
Gross profit |  | 73,135 |  |  | 66,527 |  |  | 6,608 |  |  | 9.9 | %
Gross profit as a percentage of revenue |  | 16.0 | % |  | 23.5 | % |  |  |  |  |  |
General and administrative expense |  | 43,356 |  |  | 31,969 |  |  | 11,387 |  |  | 35.6 | %
General and administrative expense as a percentage of revenue |  | 9.5 | % |  | 11.3 | % |  |  |  |  |  |
Goodwill impairment |  | 139,444 |  |  | — |  |  | 139,444 |  |  |
Interest (income) expense, net |  | 32,178 |  |  | 12,964 |  |  | 19,214 |  |  |  |
Other (income) expense, net |  | 4,955 |  |  | 14,254 |  |  | (9,299 | ) |  |  |
Income (loss) before taxes and discontinued operations |  | $ | (146,798 | ) |  | $ | 7,340 |  |  | $ | (154,138 | ) |  | (2,100.0 | )%
Income (loss) before taxes and discontinued operations as a percentage of revenue |  | (32.1 | )% |  | 2.6 | % |  |  |  |  |  |

Compression Division revenues increased $175.1 million during 2015 compared to the prior year due to the CSI Acquisition, which generated aggregate increased revenues of approximately $182.3 million during the current year. CSI compression and aftermarket services revenues generated approximately $119.4 million of increased compression service revenues during 2015 compared to the prior year. The increase in CSI revenues is primarily attributable to a full twelve months of activity in the current year compared to approximately five months of activity in the prior year due to the August 4, 2014 acquisition date. This increase in service revenue was partially offset by decreased non-CSI service revenue of approximately $10.9 million, primarily due to decreased demand for low-horsepower production enhancement compression services as a result of lower oil and natural gas commodity prices. Revenues from sales of compressor packages and parts during the current year increased $66.6 million compared to the prior year with $63.0 million of the increase related to sales of compressors and parts by CSI. The $3.6 million of increased sales of non-CSI compressors and parts was primarily generated by a large sale of low-horsepower compressor packages to a single customer in late 2015, although this sale will result in reduced compression service revenues from these packages going forward. Compression Division sales of compressor packages have decreased during the last half of 2015 due to reduced customer demand, as reflected by the current reduced fabrication backlog for CSI compressor packages. This decrease in demand due to reduced oil and natural gas prices is expected to continue going forward until such pricing improves.
Compression Division gross profit increased during the current year compared to the prior year due to the impact of the CSI Acquisition, which generated approximately $12.9 million of increased gross profit during the current year. The increase in gross profit was despite the impact of approximately $11.7 million of increased impairments of compressor package equipment and identified intangible assets. These asset impairments reflected the reduced fair values for these assets as a result of decreased expected future demand and cash flows due to low oil and natural gas prices. Gross profit was also negatively affected by the decreased activity level of our non-CSI operations as discussed above. CSI gross profit also includes approximately $74.7 million of depreciation and amortization expense, which reflects the impact of the allocation of the CSI Acquisition purchase price. The Compression Division has taken cost reduction steps including headcount reductions, deferrals of wage increases, and other efforts to reduce the cost of its fabrication and field operations and is continuing to review its cost structure for additional opportunities to improve profitability in the current operating environment.
The Compression Division reflected a significant decrease in pretax earnings during the current year compared to the prior year, primarily due to the impairment of a portion of Compression Division goodwill during the fourth quarter of 2015 pursuant to ASC 350-20. In addition, Compression Division interest expense increased significantly as a result of the issuance by CCLP of its 7.25% Senior Notes due 2022 (the "CCLP Senior Notes") and the increased borrowings by CCLP under the CCLP Credit Agreement to finance a portion of the purchase price of the CSI Acquisition during 2014. Compression Division administrative expense levels increased compared to the prior year, primarily due to the impact of the CSI Acquisition and the resulting increased corporate allocated costs, partly mitigated by certain administrative cost decreases and integration efficiencies. Other expense
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decreased, primarily due to $9.3 million of interim financing commitment fees associated with the CSI Acquisition incurred in the prior year, partially offset by increased amortization of deferred finance costs during the current year.
Offshore Division
Offshore Services Segment

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 122,194 |  |  | $ | 195,372 |  |  | $ | (73,178 | ) |  | (37.5 | )%
Gross profit (loss) |  | 10,602 |  |  | (10,314 | ) |  | 20,916 |  |  | 202.8 | %
Gross profit as a percentage of revenue |  | 8.7 | % |  | (5.3 | )% |  |  |  |  |  |
General and administrative expense |  | 10,689 |  |  | 12,097 |  |  | (1,408 | ) |  | (11.6 | )%
General and administrative expense as a percentage of revenue |  | 8.7 | % |  | 6.2 | % |  |  |  |  |  |
Impairment of goodwill |  | — |  |  | 3,936 |  |  | (3,936 | ) |  |  |
Interest (income) expense, net |  | — |  |  | 36 |  |  | (36 | ) |  |  |
Other (income) expense, net |  | 108 |  |  | (132 | ) |  | 240 |  |  |  |
Loss before taxes and discontinued operations |  | $ | (195 | ) |  | $ | (26,251 | ) |  | $ | 26,056 |  |  | 99.3 | %
Loss before taxes and discontinued operations as a percentage of revenue |  | (0.2 | )% |  | (13.4 | )% |  |  |  |  |  |

Revenues for the Offshore Services segment decreased significantly during 2015 compared to the prior year due to decreased revenues from its diving, heavy lift services, and well abandonment businesses. Decreased diving and well abandonment activity levels in the U.S. Gulf of Mexico reflected an overall decrease in demand in this market, partly due to customers' postponements of certain potential well abandonment projects. Given the current decreased oil and natural gas price environment, the Offshore Services segment anticipates a continued decrease in demand for its services compared to 2014 levels for the foreseeable future. Offshore Services revenues during the current year were also negatively affected by the reduction in work performed for our Maritech segment compared to the prior year, with $5.1 million of such work being performed during the current year compared to $30.6 million of revenues during the prior year. Revenues for work performed for Maritech, which are eliminated in consolidation, are expected to continue to be lower in future periods.
Gross profit for the Offshore Services segment increased during the current year compared to a gross loss for the prior year despite the impact of decreased activity levels for diving, well abandonment, and heavy lift services as discussed above. Impairments of long-lived assets decreased approximately $13.7 million compared to the prior year due to impairments during 2014 of certain heavy lift and dive support vessels and associated equipment assets, as the fair values for these assets were negatively affected by the expected decreases in utilization and demand. In addition, cost reduction measures and process efficiencies that were implemented during the current and prior years, including reducing the size of the segment's vessel and equipment fleets, resulted in increased gross profit. The Offshore Services segment continues to consider additional opportunities to optimize its operating cost structure.
The Offshore Services segment reported a decreased loss compared to the prior year due to the increased gross profit discussed above, decreased general and administrative expenses, and the goodwill impairment during the prior year. The Offshore Services segment continues to review its administrative cost structure and made additional headcount reductions and process efficiency actions during 2015.
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Maritech Segment

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 2,438 |  |  | $ | 4,722 |  |  | $ | (2,284 | ) |  | (48.4 | )%
Gross profit (loss) |  | (2,523 | ) |  | (69,861 | ) |  | 67,338 |  |  | 96.4 | %
General and administrative expense |  | 1,281 |  |  | 1,359 |  |  | (78 | ) |  | (5.7 | )%
General and administrative expense as a percentage of revenue |  | 52.5 | % |  | 28.8 | % |  |  |  |  |  |
Interest (income) expense, net |  | 29 |  |  | 11 |  |  | 18 |  |  |  |
(Gain) loss on sales of assets |  | — |  |  | (77 | ) |  | 77 |  |  |  |
Other (income) expense, net |  | — |  |  | — |  |  | — |  |  |  |
Loss before taxes and discontinued operations |  | $ | (3,833 | ) |  | $ | (71,154 | ) |  | $ | 67,321 |  |  | 94.6 | %

As a result of the sale of almost all of its producing properties during 2011 and 2012, Maritech revenues were negligible and are expected to continue to be negligible going forward.
Maritech recorded a decreased gross loss during the current year compared to the prior year due to $70.1 million of decreased excess decommissioning costs charged to earnings during 2015 compared to 2014. Maritech recorded $2.7 million of excess decommissioning costs to expense during the current year period.
Maritech’s pretax loss during the current year decreased compared to the prior year, primarily due to the decreased gross loss discussed above.
Corporate Overhead

|  | Year Ended December 31, |  | Period to Period Change
|  | 2015 |  | 2014 |  | 2015 vs 2014 |  | % Change
|  | (In Thousands, Except Percentages)
Gross profit (loss) (primarily depreciation expense) |  | $ | (913 | ) |  | $ | (1,725 | ) |  | $ | 812 |  |  | 47.1 | %
General and administrative expense |  | 52,189 |  |  | 41,139 |  |  | 11,050 |  |  | 26.9 | %
Interest (income) expense, net |  | 18,654 |  |  | 19,268 |  |  | (614 | ) |  |  |
Other (income) expense, net |  | 4,249 |  |  | 4,222 |  |  | 27 |  |  |  |
(Loss) before taxes and discontinued operations |  | $ | (76,005 | ) |  | $ | (66,354 | ) |  | $ | (9,651 | ) |  | (14.5 | )%

Corporate Overhead pretax loss increased during 2015 compared to the prior year, primarily due to increased general and administrative expense. Corporate general and administrative costs increased, primarily due to $15.8 million of increased salary related expenses, primarily from increased incentive and equity compensation. The increase in equity compensation includes the impact of a $6.7 million immaterial correction adjustment. This increase in salary and related expenses was partially offset by approximately $3.4 million of increased costs allocated to other segments, $0.8 million of decreased professional fees, and $0.5 million decrease in employee expenses. Interest expense decreased due to decreased TETRA borrowings outstanding during the current period, however, is expected to increase going forward following the November 2015 issuance of the Series 2015 Senior Notes.
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2014 Compared to 2013
Consolidated Comparisons

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 1,077,567 |  |  | $ | 909,398 |  |  | $ | 168,169 |  |  | 18.5 | %
Gross profit |  | 95,044 |  |  | 135,392 |  |  | (40,348 | ) |  | (29.8 | )%
Gross profit as a percentage of revenue |  | 8.8 | % |  | 14.9 | % |  |  |  |  |  |
General and administrative expense |  | 142,689 |  |  | 131,466 |  |  | 11,223 |  |  | 8.5 | %
General and administrative expense as a percentage of revenue |  | 13.2 | % |  | 14.5 | % |  |  |  |  |  |
Goodwill impairment |  | 64,295 |  |  | — |  |  | 64,295 |  |  |
Interest expense, net |  | 31,998 |  |  | 17,121 |  |  | 14,877 |  |  |  |
(Gain) loss on sale of assets |  | (11 | ) |  | (5,776 | ) |  | 5,765 |  |  |  |
Other (income) expense, net |  | 13,944 |  |  | (7,291 | ) |  | 21,235 |  |  |  |
Income (loss) before taxes and discontinued operations |  | (157,871 | ) |  | (128 | ) |  | (157,743 | ) |  |  |
Income (loss) before taxes and discontinued operations as a percentage of revenue |  | (14.7 | )% |  | — | % |  |  |  |  |  |
Provision (benefit) for income taxes |  | 9,704 |  |  | (3,454 | ) |  | 13,158 |  |  |  |
Income (loss) before discontinued operations |  | (167,575 | ) |  | 3,326 |  |  | (170,901 | ) |  |  |
Income (loss) from discontinued operations, net of taxes |  | — |  |  | (1 | ) |  | 1 |  |  |  |
Net income (loss) |  | (167,575 | ) |  | 3,325 |  |  | (170,900 | ) |  |  |
Net income attributable to noncontrolling interest |  | (2,103 | ) |  | (3,172 | ) |  | 1,069 |  |  |  |
Net income (loss) attributable to TETRA stockholders |  | $ | (169,678 | ) |  | $ | 153 |  |  | $ | (169,831 | ) |  |  |

Consolidated revenues during 2014 increased compared to 2013 due to increased revenues of our Compression and Fluids Divisions. Our Compression Division reflected record revenues due to the significant impact of its August 4, 2014, acquisition of CSI. The acquired operations of CSI, which generated approximately $152.5 million of revenues subsequent to the August 4, 2014, acquisition closing date, significantly expands the scope of our Compression Division, which now provides a full range of compression products and services that cover compression needs throughout the entire natural gas production and transportation cycle. Growth of the Fluids Division's onshore water management business and the increased sales of its manufactured products resulted in record revenues for this segment during 2014. However, these increases were partially offset by decreased activity by our Offshore Services and Production Testing Divisions. Offshore Services experienced decreased demand throughout 2014 for all of its services, including heavy lift, contract diving, and well abandonment businesses. Production Testing showed improved revenues during the last half of 2014 compared to 2013, as it continued to replace decreased activity by certain significant customers. Consolidated gross profit decreased, despite the increased profitability of the Compression Division, primarily due to the decreased Offshore Services and Production Testing profitability that reflected the decreased demand for services and the impact of approximately $34.8 million of asset impairments during the fourth quarter of 2014. Similar to 2013, Maritech recorded charges to earnings of approximately $73.2 million for excess decommissioning costs during 2014, largely due to remediation work determined to be required on previously abandoned wells.
Consolidated general and administrative expenses increased during 2014 compared to 2013 due to increased Compression Division expenses associated with the acquired operations of CSI, as well as approximately $8.7 million of consolidated transaction costs, primarily for the CSI Acquisition. Decreased general and administrative expenses during 2014 for our Production Testing, Maritech, Offshore Services, and Corporate Divisions compared to 2013 reflect overall cost reduction efforts, which consisted of headcount reductions and other reduced employee-related expenses.
Following the fourth quarter of 2014, we performed an annual test of goodwill impairment in accordance with ASC 350-20. During the last half of 2014, global oil and natural gas commodity prices, particularly oil, decreased significantly. This decrease in commodity prices is expected to have a negative impact on industry
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drilling and capital expenditure activity, which affects the demand for products and services of each of our reporting units. This expected decreased demand particularly affects the future levels of revenues and cash flows of our Production Testing and Offshore Services reporting units, which were experiencing challenging market conditions prior to mid-2014. The accompanying decrease in our stock price during the last half of 2014 has also caused an overall reduction in our market capitalization. As part of the test of goodwill impairment, we estimated the fair value of each our reporting units, and determined, based on these estimated values, that an impairment of the goodwill of our Production Testing and Offshore Services reporting units was necessary, primarily due to the market factors discussed above. Accordingly, during the fourth quarter of 2014, we recorded total impairment charges of $64.3 million associated with the goodwill of these reporting units.
Consolidated interest expense increased due to increased borrowings, primarily related to Compression borrowings under CCLP's new revolving credit facility and 7.25% Senior Notes, which were used to fund a portion of the CSI Acquisition purchase price.
Consolidated gains on sale of assets decreased during 2014, primarily due to the sale by Maritech of one of its remaining oil and gas properties during 2013.
Consolidated other expense was approximately $13.9 million during 2014 compared to $6.3 million of other income during the prior year. In connection with the CSI Acquisition, our Compression Division incurred approximately $9.3 million of one-time interim financing costs during 2014. The current year other expense was recorded despite a $5.7 million gain associated with the first quarter of 2014 acquisition of the interest in TETRA Arabia that we did not previously own. This gain was partially offset by a $2.9 million charge associated with the settlement of the pre-existing relationship with the other shareholder. Other income was recorded during 2013, as prior to the acquisition of the remaining interest of TETRA Arabia, the net earnings from TETRA Arabia were included in other income.
Despite the significant pre-tax loss for the year ended December 31, 2014, we recorded a provision for income tax during the year, primarily due to the recording of a valuation allowance on U.S. federal deferred tax assets in the amount of approximately $69.9 million as well as an additional valuation allowance on a portion of our state and foreign deferred tax assets. We establish a valuation allowance to reduce the deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. We considered all available evidence, both positive and negative, in determining whether, based on the weight of that evidence, a valuation allowance is needed for some portion or all of our deferred tax assets. In determining the need for a valuation allowance on our deferred tax assets, we placed greater weight on recent and objectively verifiable current information, as compared to more forward-looking information that is used in valuing other assets on the balance sheet or making going concern determinations.
Divisional Comparisons
Fluids Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 437,362 |  |  | $ | 382,663 |  |  | $ | 54,699 |  |  | 14.3 | %
Gross profit |  | 97,806 |  |  | 100,106 |  |  | (2,300 | ) |  | (2.3 | )%
Gross profit as a percentage of revenue |  | 22.4 | % |  | 26.2 | % |  |  |  |  |  |
General and administrative expense |  | 35,625 |  |  | 32,648 |  |  | 2,977 |  |  | 9.1 | %
General and administrative expense as a percentage of revenue |  | 8.1 | % |  | 8.5 | % |  |  |  |  |  |
Interest (income) expense, net |  | (250 | ) |  | (148 | ) |  | (102 | ) |  |  |
Other (income) expense, net |  | (2,274 | ) |  | (1,832 | ) |  | (442 | ) |  |  |
Income before taxes and discontinued operations |  | $ | 64,705 |  |  | $ | 69,438 |  |  | $ | (4,733 | ) |  | (6.8 | )%
Income before taxes and discontinued operations as a percentage of revenue |  | 14.8 | % |  | 18.1 | % |  |  |  |  |  |

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The increase in Fluids Division revenues during 2014 compared to 2013 was primarily due to approximately $41.1 million of increased services revenues, largely due to increased water management services revenue, which includes the impact of the January 2014 acquisition of TD Water Transfer and the continuing growth of our water management business, despite increased competition. Fluids Division revenues also increased due to the growth of our foreign completion services revenues, including approximately $13.3 million due to the January 2014 acquisition of the additional 50% interest in TETRA Arabia that resulted in this entity becoming a wholly owned consolidated subsidiary. The Fluids Division also reported approximately $13.6 million of increased product sales revenues due to increased demand for calcium chloride products, both in the U.S. and in Europe. This increase in manufactured products sales revenues was partially offset by decreased CBF product sales, as increases in foreign and U.S. onshore CBF product sales revenues were more than offset by decreased U.S. offshore CBF product sales revenues that were primarily caused by customer operational delays.
Fluids Division gross profit decreased during 2014 compared to 2013, primarily due to the impact of the reduced Gulf of Mexico CBF activity, as well as from increased competition and operating costs for our water management business. This decrease more than offset the increased gross profit associated with foreign CBF product sales and the consolidation of TETRA Arabia. In addition, gross profit was negatively impacted by approximately $2.1 million of charges to earnings for unused water management inventory and $6.5 million of long-lived asset impairments, primarily associated with expected decreased utilization of certain water management equipment and our Brazil CBF facility, which suspended its operation due to the termination of its customer CBF product sales contract during 2014.
Fluids Division income before taxes decreased during 2014 compared to 2013 due to the decrease in gross profit discussed above and due to increased general and administrative costs. Fluids Division administrative costs increased primarily due to increased personnel-related costs, partially offset by decreased professional fee expenses. Other income increased during 2014 due to a $2.7 million allocated portion of the remeasurement gain recorded from the January 2014 acquisition of the remaining interest in TETRA Arabia. In connection with this acquisition, we recorded a $5.7 million consolidated gain from the fair value remeasurement of our previous investment in TETRA Arabia. Prior to this acquisition, the Fluids Division recorded its share of the earnings from the unconsolidated TETRA Arabia subsidiary in other income.
Production Testing Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 192,894 |  |  | $ | 195,983 |  |  | $ | (3,089 | ) |  | (1.6 | )%
Gross profit |  | 12,622 |  |  | 29,566 |  |  | (16,944 | ) |  | (57.3 | )%
Gross profit as a percentage of revenue |  | 6.5 | % |  | 15.1 | % |  |  |  |  |  |
General and administrative expense |  | 20,512 |  |  | 24,671 |  |  | (4,159 | ) |  | (16.9 | )%
General and administrative expense as a percentage of revenue |  | 10.6 | % |  | 12.6 | % |  |  |  |  |  |
Goodwill impairment |  | 60,358 |  |  | — |  |  | 60,358 |  |  |
Interest (income) expense, net |  | (31 | ) |  | (34 | ) |  | 3 |  |  |  |
Other (income) expense, net |  | (2,061 | ) |  | (9,164 | ) |  | 7,103 |  |  |  |
Income (loss) before taxes and discontinued operations |  | $ | (66,156 | ) |  | $ | 14,093 |  |  | $ | (80,249 | ) |  | (569.4 | )%
Income (loss) before taxes and discontinued operations as a percentage of revenue |  | (34.3 | )% |  | 7.2 | % |  |  |  |  |  |

Production Testing revenues decreased during 2014 compared to 2013, primarily due to the impact of decreased activity by customers in certain key U.S. markets. The Production Testing Division continues to expand its domestic customer base, however, and fourth quarter 2014 domestic revenues increased compared to 2013. The Production Testing Division also continued to capitalize on the increased activity in certain shale reservoir markets. Additionally, the impact of increased competition during 2014 negatively affected pricing and activity levels for services in selected markets in the U.S. These decreases were partially offset by increased revenues from foreign activity, including approximately $24.8 million of increased revenues resulting from our January 2014
47

acquisition of the 50% ownership interest in TETRA Arabia that we did not previously own and which resulted in TETRA Arabia becoming a wholly owned consolidated subsidiary.
Production Testing gross profit decreased significantly during 2014 compared to 2013 due to the impact of pricing competition and the above mentioned decreased activity levels in certain U.S. markets. The impact of the decreased U.S. gross profit more than offset the increased gross profit resulting from the consolidation of TETRA Arabia. In addition, during the fourth quarter of 2014, Production Testing gross profit includes the negative impact of approximately $14.5 million for certain equipment and intangible asset impairments, as the fair values for these long-lived assets were negatively affected by an expected decrease in utilization, demand, and future cash flows. In response to the decreased activity in certain U.S. markets, during the first quarter of 2014, we took steps to downsize field operations, reduce operating headcount, and implement other cost reductions for the Production Testing Division.
Production Testing income (loss) before taxes decreased significantly during 2014 compared to 2013, primarily due to the impairment of a portion of Production Testing Division goodwill during the fourth quarter of 2014, pursuant to ASC 350-20, and due to the significant decrease in gross profit discussed above. In addition, other income decreased due to the consolidation of the TETRA Arabia subsidiary following our January 2014 acquisition of the remaining 50% ownership interest. Prior to the acquisition, the Production Testing Division recorded its share of earnings from the unconsolidated TETRA Arabia subsidiary in other income. In connection with this acquisition, we recorded a $5.7 million consolidated gain from the fair value remeasurement of our previous investment in TETRA Arabia. The Production Testing Division's portion of this gain was $3.0 million and was largely offset by an approximately $2.9 million charge to earnings related to the termination of our preexisting relationship with the owner of the other 50% interest. Production Testing Division general and administrative expenses decreased despite the consolidation of TETRA Arabia and increased legal expenses incurred during the period due to the impact of cost reductions.
Compression Division

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 282,505 |  |  | $ | 121,288 |  |  | $ | 161,217 |  |  | 132.9 | %
Gross profit |  | 66,527 |  |  | 38,726 |  |  | 27,801 |  |  | 71.8 | %
Gross profit as a percentage of revenue |  | 23.5 | % |  | 31.9 | % |  |  |  |  |  |
General and administrative expense |  | 31,969 |  |  | 17,353 |  |  | 14,616 |  |  | 84.2 | %
General and administrative expense as a percentage of revenue |  | 11.3 | % |  | 14.3 | % |  |  |  |  |  |
Interest (income) expense, net |  | 12,964 |  |  | 469 |  |  | 12,495 |  |  |  |
Other (income) expense, net |  | 14,254 |  |  | 704 |  |  | 13,550 |  |  |  |
Income before taxes and discontinued operations |  | $ | 7,340 |  |  | $ | 20,200 |  |  | $ | (12,860 | ) |  | (63.7 | )%
Income before taxes and discontinued operations as a percentage of revenue |  | 2.6 | % |  | 16.7 | % |  |  |  |  |  |

Compression Division revenues increased significantly during 2014 compared to 2013 primarily due to the acquisition of CSI, which generated approximately $152.5 million of aggregate revenues subsequent to the August 4, 2014, closing date. Approximately $86.0 million of increased compression service revenues were generated by the compression services and aftermarket services of CSI, and approximately $7.4 million of the increase was due to increased non-CSI service revenues due to increased activity in the U.S. Non-CSI U.S. service revenues increased due to increased low-horsepower compression services activity, primarily in liquids-rich resource play reservoirs. Revenues from the sales of compressor packages and parts during 2014 increased $66.5 million compared to 2013, with the increase associated with CSI operations.
Compression Division gross profit increased during 2014 compared to 2013 also, primarily due to the impact of the CSI Acquisition, which generated approximately $23.2 million of gross profit during the period subsequent to the August 4, 2014, closing date. CSI gross profit includes the impact on depreciation and amortization expense from the preliminary allocation of the acquisition purchase price.
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Income before taxes for the Compression Division decreased during 2014 compared to 2013, primarily due to non-recurring charges to earnings in connection with the CSI Acquisition, including the impact on general and administrative expenses from approximately $6.4 million of legal, acquisition consulting, other professional fees, and other CSI Acquisition transaction related expenses. In addition, general and administrative expenses increased due to the additional administrative and executive personnel and expenses associated with CSI's operations as well as approximately $0.7 million of increased corporate allocated costs and $1.2 million for implementation costs of new enterprise system software. Other expense increased significantly, primarily due to approximately $9.3 million of interim financing commitment fees that were incurred by CCLP and by CSI Compressco GP Inc. in connection with the CSI Acquisition. In addition, approximately $0.8 million of unamortized financing costs associated with CCLP's previous bank credit facility were charged to other expense during 2014 upon its cancellation in connection with CCLP's new bank credit facility. Interest expense increased significantly as a result of the issuance of the CCLP Senior Notes and the increased borrowings by CCLP under its new bank credit facility in connection with the August 4, 2014 CSI Acquisition.
Offshore Division
Offshore Services Segment

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 195,372 |  |  | $ | 255,812 |  |  | $ | (60,440 | ) |  | (23.6 | )%
Gross profit |  | (10,314 | ) |  | 36,147 |  |  | (46,461 | ) |  | (128.5 | )%
Gross profit as a percentage of revenue |  | (5.3 | )% |  | 14.1 | % |  |  |  |  |  |
General and administrative expense |  | 12,097 |  |  | 13,386 |  |  | (1,289 | ) |  | (9.6 | )%
General and administrative expense as a percentage of revenue |  | 6.2 | % |  | 5.2 | % |  |  |  |  |  |
Goodwill impairment |  | 3,936 |  |  | — |  |  | 3,936 |  |  |
Interest (income) expense, net |  | 36 |  |  | 109 |  |  | (73 | ) |  |  |
Other (income) expense, net |  | (132 | ) |  | (218 | ) |  | 86 |  |  |  |
Income (loss) before taxes and discontinued operations |  | $ | (26,251 | ) |  | $ | 22,870 |  |  | $ | (49,121 | ) |  | (214.8 | )%
Income (loss) before taxes and discontinued operations as a percentage of revenue |  | (13.4 | )% |  | 8.9 | % |  |  |  |  |  |

Revenues for the Offshore Services segment decreased during 2014 compared to 2013 due to decreased revenues, primarily from its heavy lift, diving services, and well abandonment services businesses. The heavy lift business was also negatively affected by unseasonal weather during the first half of 2014 and by drydock operations performed during the first quarter of 2014 on the TETRA Hedron and TETRA Arapaho derrick barges. Decreased dive services and well abandonment activity levels in the U.S. Gulf of Mexico reflected an overall decrease in demand in this market, partly due to property acquisitions by key customers which have resulted in a postponement of certain well abandonment projects. Offshore Services revenues during 2014 were also affected by the reduction in work performed for our Maritech segment compared to the prior year, with $30.6 million of such work during the current year compared to $50.1 million of revenues related to work performed for Maritech during the prior year.
Offshore Services reported a gross loss during 2014 due to the decreased revenues as discussed above. In addition, during the fourth quarter of 2014, Offshore Services reflected approximately $13.7 million of impairments, primarily for certain heavy lift and dive support vessels and associated equipment assets, as the fair values for these assets were negatively affected by an expected decrease in utilization and demand. The Offshore Services gross loss was incurred despite the impact of cost reduction measures that were implemented during the first half of 2013 and that continued in 2014.
Offshore Services loss before taxes is due to the gross loss discussed above and due to the impairment of Offshore Services goodwill during the fourth quarter of 2014 pursuant to ASC 350-20. General and administrative
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expense levels reflect the segment's administrative cost reductions taken during the first half of 2013 and during 2014, and decreased despite approximately $0.5 million of increased bad debt expense.
Maritech Segment

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Revenues |  | $ | 4,722 |  |  | $ | 5,560 |  |  | $ | (838 | ) |  | (15.1 | )%
Gross profit (loss) |  | (69,861 | ) |  | (66,828 | ) |  | (3,033 | ) |  | (4.5 | )%
General and administrative expense |  | 1,359 |  |  | 2,902 |  |  | (1,543 | ) |  | (53.2 | )%
General and administrative expense as a percentage of revenue |  | 28.8 | % |  | 52.2 | % |  |  |  |  |  |
Interest (income) expense, net |  | 11 |  |  | 11 |  |  | — |  |  |  |
(Gain) loss on sales of assets |  | (77 | ) |  | (5,378 | ) |  | 5,301 |  |  |  |
Other (income) expense, net |  | — |  |  | — |  |  | — |  |  |  |
Loss before taxes and discontinued operations |  | $ | (71,154 | ) |  | $ | (64,363 | ) |  | $ | (6,791 | ) |  | (10.6 | )%

As a result of the sale of almost all of its producing properties during 2011 and 2012, Maritech revenues during 2014 and 2013 were negligible and are expected to continue to be negligible going forward.
Maritech gross loss increased during 2014 compared to 2013, primarily due to an approximately $5.6 million credit against operating expenses during 2013 associated with the net impact of an insurance-related litigation settlement in the first quarter of 2013. Maritech charged approximately $73.2 million of additional and excess decommissioning costs to expense during 2014, which reflects a $2.1 million decrease for these costs compared to 2013. Approximately $39.2 million of the $73.2 million total additional and excess decommissioning costs expensed during 2014 was due to current and future additional well abandonment work required for remediation of certain wells under pressure that were previously plugged.
The increase in Maritech’s pretax loss during 2014 compared to 2013 is primarily due to the decreased gross loss discussed above and due to the significant decrease in other income, as during 2013 Maritech sold its interest in one of its remaining offshore oil and gas properties, resulting in a gain of approximately $5.4 million. Maritech administrative costs decreased compared to the prior year period due to legal expenses recorded during 2013 primarily associated with the insurance-related litigation settlement.
Corporate Overhead

|  | Year Ended December 31, |  | Period to Period Change
|  | 2014 |  | 2013 |  | 2014 vs 2013 |  | % Change
|  | (In Thousands, Except Percentages)
Gross profit (loss) (primarily depreciation expense) |  | $ | (1,725 | ) |  | $ | (2,327 | ) |  | $ | 602 |  |  | 25.9 | %
General and administrative expense |  | 41,139 |  |  | 40,506 |  |  | 633 |  |  | 1.6 | %
Interest (income) expense, net |  | 19,268 |  |  | 16,715 |  |  | 2,553 |  |  |  |
Other (income) expense, net |  | 4,222 |  |  | 2,711 |  |  | 1,511 |  |  |  |
Loss before taxes and discontinued operations |  | $ | (66,354 | ) |  | $ | (62,259 | ) |  | $ | (4,095 | ) |  | (6.6 | )%

Corporate Overhead pretax loss increased during 2014 compared to 2013, primarily due to increased corporate interest expense and other expense. Increased interest expense was due to increased borrowings outstanding during 2014, including the impact of corporate borrowings in connection with the CSI Acquisition. Increased other expense was primarily due to increased foreign currency exchange losses. Corporate general and administrative expenses increased, as approximately $1.5 million of increased professional expenses, including approximately $0.6 million of transaction related expenses, approximately $2.0 million of increased salary and related expenses, and approximately $1.3 million of general expenses were largely offset by approximately $2.5
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million of decreased insurance expense and approximately $1.7 million of additional expenses allocated to other segments.
Liquidity and Capital Resources
Throughout 2015, and continuing into early 2016, significant decreases in oil and natural gas commodity prices have lowered the capital expenditure and operating plans of many of our customers, creating additional uncertainty regarding the expected demand for many of our products and services and the resulting cash flows from operating activities for the foreseeable future. In addition, the availability of new borrowings in the current capital markets is more limited and costly. Accordingly, throughout 2015 and early 2016, we have implemented strategic cost reduction measures designed to lower our cost structure in the current environment and have taken other steps to improve our operating cash flows. We continue to review the cost structure of each of our businesses and seek additional steps, as necessary, to reduce costs to respond to the current, low commodity price environment.
On November 20, 2015, pursuant to the 2015 Senior Note Purchase Agreement with GSO Tetra Holdings LP, an unrelated third party, we issued and sold $125.0 million in aggregate principal amount of our Series 2015 Senior Notes. Immediately after the closing and funding, we applied a portion of the $119.7 million proceeds from the sale of the Series 2015 Senior Notes (consisting of $125.0 million aggregate principal amount net of a $5.0 million discount and certain financing costs) to repay all of the indebtedness for borrowed money outstanding under our Credit Agreement. In December 2015, we applied the remaining portion of the proceeds, together with other funds to (i) pay the $25.0 million purchase price for certain of our Series 2010 Senior Notes accepted for purchase pursuant to the Tender Offer, (ii) prepay in full all amounts owed in respect of the outstanding Series 2006-A Senior Notes due April 30, 2016, and (iii) pay other fees and expenses associated with the transactions contemplated under the Series 2015 Senior Note Purchase Agreement. In addition, we entered into an amendment of the Senior Secured Note Purchase Agreement, resulting in the extension of the maturity date of the $50.0 million of Senior Secured Notes from 2017 to 2019. As a result of these transactions, we have repaid and extended the maturity dates of a significant portion of TETRA's total long-term debt without significantly increasing the amount of TETRA's net borrowings. In addition, we will continue to consider certain additional financing transactions with a view of generating additional cash to reduce the amount of our outstanding borrowings under our Credit Agreement, repay or refinance additional amounts of our Senior Notes, and generate additional liquidity. We believe the steps taken, including the cost reduction steps discussed above, have enhanced our capital structure and operating cash flows and will continue to enhance our operating cash flows in the future. As a result, we believe that despite the current industry environment and activity levels, we will have adequate liquidity to fund our operations and debt obligations and maintain compliance with debt covenants through December 31, 2016. However, we cannot predict how an extended period of low oil and gas prices will affect our operations and liquidity levels.
Despite a challenging market environment for a number of our businesses, our consolidated cash flows from operating activities increased during 2015 compared to the prior year. This increase was due to a number of factors, including the growth of certain of our businesses, the CSI Acquisition, the impact of cost reduction efforts, and a reduction in Maritech abandonment and decommissioning activities compared to the prior year. Approximately $101.9 million of our consolidated operating cash flows during the year ended December 31, 2015, were generated by CCLP, and we received approximately $30.5 million of distributions from CCLP during the year ended December 31, 2015, compared to $24.1 million during the corresponding prior year. Excluding the cash flows from operating activities of CCLP, our cash flows from operating activities, together with the borrowings available under our Credit Agreement and our share of distributions from CCLP, are expected to be adequate to fund our capital expenditures and debt service requirements through December 31, 2016. A portion of the increased operating cash flows of CCLP following the CSI Acquisition are used by CCLP to pay the debt service requirements of the CCLP Senior Notes and CCLP Credit Agreement. CCLP continues to review its anticipated operating activity levels in the current low commodity price environment and its impact on the expected levels of distributable cash flows in determining the amount of its quarterly distributions. The amount of distributions we received from CCLP, including the impact of the incentive distribution rights owned by our wholly owned CSI Compressco GP Inc. subsidiary, resulted in an increase in the quarterly distributions we received from CCLP during 2015 compared to the prior year. In January 2016, however, the board of directors of CSI Compressco GP Inc. (CCLP's general partner) declared a cash distribution attributable to the quarter ended December 31, 2015, of $0.3775 per unit, which represents a decrease of $0.1250 per unit compared to the previous quarterly distribution. The amount of quarterly distributions is determined based on a variety of factors, including estimates of CCLP's cash needs to fund its future operating, investing, and debt service requirements. During the current period of low oil and natural gas pricing, there can be no assurance that quarterly distributions from CCLP will increase from this reduced amount per unit or that there will not be future decreases in the amount of distributions going forward. Our ability to meet
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our financial obligations and fund future growth is dependent on future levels of consolidated operating cash flows and the availability of capital resources in uncertain operating and financial markets. Our consolidated sources and uses of cash during each of the following years are as follows:

| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
| (In Thousands)
Operating activities | $ | 195,951 |  |  | $ | 108,645 |  |  | $ | 49,656 |
Investing activities | (114,987 | ) |  | (967,739 | ) |  | (100,025 | )
Financing activities | (103,437 | ) |  | 871,644 |  |  | 15,734 |

Our consolidated capital structure changed significantly during 2014 as a result of the CSI Acquisition. Because of the increased level of consolidated debt, it is important to consider TETRA's capital structure and CCLP's capital structure separately, as we have no cross default provisions, cross collateralization provisions, or cross guarantees with CCLP's debt, nor does CCLP with TETRA's debt. CCLP is not a restricted subsidiary or guarantor under any of our debt or credit agreements. (See Financing Activities section below for a complete discussion of the terms of TETRA's and CCLP's respective debt arrangements.) Our consolidated debt outstanding has a carrying value of approximately $873.5 million as of December 31, 2015. However, approximately $580.5 million of this consolidated debt balance is owed by CCLP and is serviced from the existing cash balances and cash flows of CCLP. Through our 44% ownership interest in CCLP and ownership of incentive distribution rights, we receive our share of the distributable cash flows of CCLP through its quarterly distributions. Approximately $10.6 million of the $23.1 million of the cash balance reflected on our consolidated balance sheet is owned by CCLP and is not available to us. As of December 31, 2015, CCLP had availability of approximately $163.4 million under the CCLP Credit Agreement, subject to limitations, and we had availability of approximately $194.6 million under our Credit Agreement.
Operating Activities
Cash flows generated by operating activities totaled $196.0 million during 2015 compared to $108.6 million during the prior year, an increase of $87.3 million. This increase in operating cash flows was due to the increased cash impact of earnings (excluding non-cash charges) compared to the prior year, including the cash impact of the acquired CSI operations. In addition, operating cash flows also increased due to the decrease in the amount spent on Maritech decommissioning activity, as approximately $10.3 million of decommissioning activity was performed during the year ended December 31, 2015 compared to $63.3 million during the prior year. We have taken steps to aggressively manage working capital, including with regard to the collection of receivables and monitoring of inventory levels. We continue to monitor customer credit risk in the current environment and have historically focused on serving larger capitalized oil and gas operators and national oil companies.
Demand for a large portion of our products and services is driven by oil and gas industry activity, which is affected by oil and natural gas commodity pricing. The dramatic decreases in oil and natural gas prices during 2015, particularly oil prices, significantly reduced the capital expenditure and operating plans of our oil and gas customers, affecting each of our operating segments. Oil and natural gas prices have been volatile in the past and are expected to continue to be volatile in the future. Worldwide drilling activity related to oil and natural gas wells has decreased, particularly affecting our Production Testing and Fluids Divisions. In addition, portions of our Compression Division and Offshore Services Division operations are also highly vulnerable to the impact of a sustained low natural gas price environment. A large portion of our consolidated cash flows generated by operating activities during 2015 resulted from equipment and product sales and specific customer projects that may not recur in 2016 at current oil and natural gas pricing levels. If oil and gas industry activity levels remain at current levels or decrease in the future, we expect that our levels of operating cash flows will be negatively affected.
During 2015, we continued to take steps to reduce operating and administrative headcount, defer salary increases, and implement other cost reductions for each of our segments. These steps are designed to further streamline our operations and downsize our organization, particularly in response to continuing market challenges for certain of our businesses. Together with the specific cost reduction steps taken during prior periods, these cost reduction efforts have resulted in increased operating cash flows and improved profitability. During the first two months of 2016, we have continued to review our overall operating and administrative cost structure, resulting in
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additional headcount reductions and reduced salaries, and we will continue to review for other opportunities to reduce costs.
As of December 31, 2015, Maritech’s decommissioning liabilities associated with its remaining offshore oil and gas production wells, platforms, and facilities totaled approximately $48.4 million. Approximately $14.6 million of this amount is expected to be performed during the twelve month period ended December 31, 2016, with the timing of a portion of this work being discretionary. Until the remaining decommissioning liabilities are extinguished, our future operating cash flows will continue to be affected by Maritech’s decommissioning expenditures as they are incurred. Included in Maritech’s decommissioning liabilities is the remaining abandonment, decommissioning, and debris removal associated with an offshore platform that was previously destroyed by a hurricane as well as certain remediation work required on wells that were previously plugged. Due to the unique nature of the remaining work to be performed associated with these properties, actual costs could greatly exceed these estimates and could therefore result in significant charges to earnings in future periods.
Asset retirement obligations are recorded in accordance with FASB ASC 410, whereby the estimated fair value of a liability for asset retirement obligations is recorded in the period in which it is incurred and in which a reasonable estimate can be made. Such estimates are based on relevant assumptions that we believe are reasonable. The cost estimates for Maritech asset retirement obligations are considered reasonable estimates consistent with market conditions at the time they are made, and we believe reflect the amount of work required to be performed in accordance with BSEE standards, as revised from time to time.
The amount of work performed or estimated to be performed on a Maritech property asset retirement obligation often exceeds amounts previously estimated for numerous reasons including physical subsea, geological, or downhole conditions that are different from those anticipated at the time of estimation due to the age of the property and the quality of information available about the particular property conditions. Maritech’s remaining oil and gas properties and production platforms were drilled and constructed by other operators many years ago, and frequently there is not a great deal of detailed documentation on which to base the estimated asset retirement obligation for these properties. Appropriate underwater surveys are typically performed to determine the condition of such properties as part of our due diligence in estimating the costs, but not all conditions have been able to be determined prior to the commencement of the actual work. During the performance of asset retirement activities, unforeseen weather or other conditions may also extend the duration and increase the cost of the projects, which are normally not done on a fixed price basis, thereby resulting in costs in excess of the original estimate.
Maritech has one remaining property that was damaged by a hurricane in the past, leaving the production platform toppled on the seabed and production tubing from the wells (which may be under pressure) bent underwater. While the basic procedures involved in the plugging and abandonment of wells and decommissioning of platforms and pipelines and removal of debris is generally similar for these types of properties, the cost of performing work at these damaged locations is particularly difficult to estimate due to the unique conditions encountered, including the uncertainty regarding the extent of physical damage to many of the structures.
In addition, Maritech has encountered situations where previously plugged and abandoned wells on its properties have later exhibited a buildup of pressure that is evidenced by gas bubbles coming from the plugged well head. We refer to this situation as “wells under pressure”, and this can either be discovered by us when we perform additional work at the property or by notification from a third party. Wells under pressure require Maritech to return to the site to perform additional plug and abandonment procedures that were not originally anticipated or included in the estimate of the asset retirement obligation for such property. Remediation work at previously abandoned well sites is particularly costly due to the lack of a platform from which to base these activities. Maritech is the last operator of record for its plugged wells and bears the risk of additional future work required as a result of wells becoming under pressure in the future.
For oil and gas properties previously operated by Maritech, the purchaser of the properties generally became the successor operator and assumed the financial responsibilities associated with the properties’ operations and abandonment and decommissioning. However, to the extent that purchasers of these oil and gas properties fail to perform the abandonment and decommissioning work required and there is insufficient bonding or other security, the previous owners and operators of the properties, including Maritech, may be required to assume responsibility for the abandonment and decommissioning obligations.
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Investing Activities
During 2015, the total amount of our net cash utilized on investing activities was $115.0 million. Total cash capital expenditures during 2015 were $120.6 million. Approximately $11.1 million of our capital expenditures during 2015 was spent by our Fluids Division, the majority of which related to chemical plant improvements. Our Production Testing Division spent approximately $7.8 million on capital expenditures, primarily to add to its international production testing equipment fleet. Our Compression Division spent approximately $95.6 million, primarily for the expansion of its compressor and equipment fleet for its CSI subsidiary. Our Offshore Services segment spent approximately $5.9 million on its various heavy lift barges and dive support vessels, primarily for required drydock expenditures.
Generally, a significant majority of our planned capital expenditures has been related to identified opportunities to grow and expand certain of our existing businesses. However, certain of these planned expenditures have been, and may continue to be, postponed or canceled in an effort to conserve capital or otherwise address expected future market conditions. We currently have no long-term capital expenditure commitments and are reviewing all capital expenditure plans carefully during the current period of reduced demand for our products and services in an effort to conserve cash and fund our liquidity needs. The deferral of capital projects could affect our ability to compete in the future. Excluding the capital expenditures of our Compression Division, we expect to spend approximately $5 to $10 million during 2016. Our Compression Division expects to spend approximately $20 to $30 million during 2016. The level of future growth capital expenditures depends on forecasted demand for our products and services. If the forecasted demand for our products and services during 2016 increases or decreases, the amount of planned expenditures on growth and expansion will be adjusted accordingly. The level of capital expenditures during 2016 is also subject to the impact of possible acquisitions.
Financing Activities
To fund our capital and working capital requirements, we may supplement our existing cash balances and cash flow from operating activities as needed from long-term borrowings, short-term borrowings, operating leases, equity and debt issuances, and other sources of capital.
Our Long-Term Debt
We are in compliance with all covenants and conditions under our long-term debt agreements as of December 31, 2015. Our continuing ability to comply with these financial covenants depends largely upon our ability to generate adequate cash flow. Historically, our financial performance has been more than adequate to meet these covenants. Due to the decreased demand for certain of our products and services by our customers in response to decreased oil and natural gas prices, we have taken strategic cost reduction efforts, including headcount reductions, deferrals of wage increases, wage reductions, and other efforts to reduce costs and generate cash to mitigate the reduced demand for our products and services. In addition, certain of our businesses have seen increased activity and profitability levels, despite current oil and natural gas prices. We believe the steps taken have enhanced our capital structure and operating cash flows and will continue to enhance our operating cash flows in the future. Based on our projections for each of the quarterly periods in 2016 and including the impact of these cost reduction efforts and expected activity levels on future estimated operating cash flows, we anticipate that, despite the current industry environment and activity levels, we will have sufficient operating cash flows to maintain compliance with the financial covenants under our long-term debt agreements through December 31, 2016. However, we cannot predict how an extended period of low commodity prices will affect our operations and liquidity levels.
Our Bank Credit Facility. As of March 3, 2016, TETRA (excluding CCLP) had an outstanding balance on its revolving credit facility (the "Credit Agreement") of approximately $40.2 million, and had $7.6 million in letters of credit and guarantees against the revolving credit facility, leaving a net availability of $177.3 million. These amounts do not reflect the CCLP Credit Agreement, which is separate and distinct from TETRA's Credit Agreement.
Under the Credit Agreement, which matures on September 30, 2019, the revolving credit facility is unsecured and guaranteed by certain of our material U.S. subsidiaries (excluding CCLP and its subsidiaries). Borrowings generally bear interest at the British Bankers Association LIBOR rate plus 1.50% to 2.75%, depending on one of our financial ratios. We pay a commitment fee ranging from 0.225% to 0.500% on unused portions of the facility. The Credit Agreement contains customary covenants and other restrictions, including certain financial ratio covenants based on our levels of debt and interest cost compared to a defined measure of our operating cash flows
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over a twelve month period. In addition, the Credit Agreement includes limitations on aggregate asset sales, individual acquisitions, and aggregate annual acquisitions and capital expenditures. Access to our revolving credit line is dependent upon our compliance with the financial ratio covenants set forth in the Credit Agreement. These financial ratios include a minimum interest charge coverage ratio (ratio of a defined measure of earnings to interest) of 3.0 and a maximum leverage ratio (ratio of debt and letters of credit outstanding to a defined measure of earnings) of 3.25. The maximum leverage ratio decreases to 3.0 as of March 31, 2016. Consolidated net earnings under the Credit Agreement are defined as the aggregate of our net income (or loss) and our consolidated restricted subsidiaries (which does not include CCLP), including cash dividends and distributions (not the return of capital) received from persons other than consolidated restricted subsidiaries (including CCLP) and after allowances for taxes for such period determined on a consolidated basis in accordance with U.S. generally accepted accounting principles ("GAAP"), excluding certain items more specifically described therein. At December 31, 2015, our leverage ratio was 1.86 to 1, compared to 2.94 at December 31, 2014. Deterioration of these financial ratios could result in a default by us under the Credit Agreement that, if not remedied, could result in termination of the Credit Agreement and acceleration of any outstanding balances. CCLP is an unrestricted subsidiary and is not a borrower or a guarantor under the Credit Agreement.
The Credit Agreement includes cross-default provisions relating to any other indebtedness (excluding indebtedness of CCLP) greater than a defined amount. The Credit Agreement also contains a covenant that restricts us from paying dividends in the event of a default or if such payment would result in an event of default.
Our Senior Unsecured Notes. In April 2006, we issued $90.0 million in aggregate principal amount of Series 2006-A Senior Notes pursuant to our existing Master Note Purchase Agreement dated September 2004, as supplemented as of April 18, 2006. In December 2015, we utilized borrowings under our Credit Agreement to prepay in full all amounts owed in respect of the outstanding Series 2006-A Senior Notes, due April 30, 2016, including a $1.6 million "make-whole" prepayment premium in accordance with the Master Note Purchase Agreement.
In December 2015, and pursuant to a Tender Offer that commenced on November 5, 2015, we purchased for cash $25.0 million aggregate principal amount of the outstanding 2010 Senior Notes, consisting of $18.1 million of the Series 2010-A Senior Notes and $6.9 million of the Series 2010-B Senior Notes. The offered consideration for Series 2010 Senior Notes was an amount of cash equal to $100,000 per $100,000 principal amount of Series 2010 Senior Notes tendered prior to December 7, 2015, and accepted for purchase by us, plus accrued and unpaid interest.
On November 20, 2015, pursuant to the 2015 Senior Note Purchase Agreement with GSO Tetra Holdings LP, an unrelated third party, we issued and sold $125.0 million in aggregate principal amount of our Series 2015 Senior Notes. Immediately after the closing and funding, we applied a portion of the $119.7 million net proceeds from the sale of the Series 2015 Senior Notes (consisting of $125.0 million aggregate principal amount net of a $5.0 million discount and certain financing costs) to repay all of the indebtedness for borrowed money outstanding under our Credit Agreement. In December 2015, we applied the remaining portion of the proceeds, together with other funds to (i) pay the $25.0 million purchase price for certain of our 2010 Senior Notes accepted for purchase pursuant to the Tender Offer, (ii) prepay in full all amounts owed in respect of the outstanding Series 2006-A Senior Notes due April 30, 2016 and (iii) pay other fees and expenses associated with the transactions contemplated under the 2015 Senior Note Purchase Agreement.
Each of the Senior Notes (the "Senior Unsecured Notes") was sold in the United States to accredited investors pursuant to an exemption from the Securities Act of 1933. The Senior Unsecured Notes are unsecured and are guaranteed by substantially all of our wholly owned U.S. subsidiaries. The 2015 Senior Note Purchase Agreement and the Note Purchase Agreements (together, "the Senior Unsecured Note Purchase Agreements"), contain customary covenants that limit our ability and the ability of certain of our restricted subsidiaries to, among other things: incur or guarantee additional indebtedness; incur or create liens; merge or consolidate or sell substantially all of our assets; engage in a different business; enter into transactions with affiliates; and make certain payments. In addition, the Senior Unsecured Note Purchase Agreements require us to maintain certain financial ratios, including a maximum leverage ratio (ratio of debt and letters of credit outstanding to a defined measure of earnings) of 3.5. Consolidated net earnings under the Senior Unsecured Note Purchase Agreements is the aggregate of our net income (or loss) and our consolidated restricted subsidiaries, including cash dividends and distributions (not the return of capital) received from persons other than consolidated restricted subsidiaries (such as CCLP) and after allowances for taxes for such period determined on a consolidated basis in accordance with U.S. generally accepted accounting principles, excluding certain items more specifically described therein. Under
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these Senior Unsecured Note Purchase Agreements, the financial ratio requirements include a minimum interest coverage ratio of 2.5 and a maximum leverage ratio of 3.5. At December 31, 2015, our leverage ratio was 1.86 to 1.
Deterioration of the financial ratios could result in a default by us under the Senior Unsecured Note Purchase Agreements and, if not remedied, could result in termination of the Senior Unsecured Note Purchase Agreements and acceleration of any outstanding balances. CCLP is an unrestricted subsidiary and is not a borrower or a guarantor under our Senior Unsecured Note Purchase Agreements.
The Senior Unsecured Note Purchase Agreements contain the following cross-default provisions. If we or any of our restricted subsidiaries (i) fails to make any payment when due beyond any applicable grace period under any indebtedness of at least $20.0 million, (ii) defaults in the performance of or compliance with any term of any indebtedness in an aggregate outstanding principal amount of at least $20.0 million or of any mortgage, indenture or other agreement relating to such indebtedness or any other condition exists, and as a result of such default or condition such indebtedness is accelerated and declared due and payable before its stated maturity or before its regularly scheduled dates for payment, or (iii) become obligated to purchase or repay indebtedness before its regular maturity or before its regularly scheduled dates of payment in an aggregate outstanding principal amount of at least $20.0 million or one or more persons have the right to require us or any of our subsidiaries to purchase or repay such indebtedness. Upon the occurrence and during the continuation of an event of default under the Senior Unsecured Note Purchase Agreements, the Senior Unsecured Notes may become immediately due and payable, either automatically or by declaration of holders of more than 50% in principal amount of the Senior Notes at the time outstanding. We are in compliance with all covenants and conditions of the Senior Unsecured Note Purchase Agreements as of December 31, 2015.
Our Senior Secured Notes. On April 30, 2015, and pursuant to a Note Purchase Agreement dated March 18, 2015 with Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative for the noteholders (the "Noteholder Representative"), and Wells Fargo Energy Capital, Inc., in its capacity as the sole initial purchaser (the "Senior Secured Note Purchase Agreement"), we issued and sold $50.0 million aggregate principal amount of Senior Secured Notes due April 1, 2017 (the "Senior Secured Notes"). In February 2016, we repaid $10.0 million of the amount outstanding under the Senior Secured Notes. The Senior Secured Notes were sold in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended (the "Securities Act"). The proceeds from these Senior Secured Notes were used to provide a portion of the funds necessary to repay the $90.0 million principal amount of the Series 2008-B Senior Notes that matured on April 30, 2015. The Senior Secured Notes are secured by our accounts receivable (excluding CCLP accounts receivable) and our common units in CCLP, and the Senior Secured Note Purchase Agreement includes financial covenants consistent with those applicable to our existing bank revolving credit facility. The Note Purchase Agreement contains customary covenants and default and cross default provisions consistent with the agreements governing our other TETRA indebtedness.
On November 5, 2015, we entered into the Second Amendment (the “Second Amendment”) to the Note Purchase Agreement that, conditioned upon the closing and funding of the issuance of the Series 2015 Senior Notes, (i) provided for the extension of the maturity date of the Senior Secured Notes from April 1, 2017 to April 1, 2019, (ii) amended certain definitions in the Note Purchase Agreement and (iii) required us to pay an extension fee.
CCLP Long-Term Debt
CCLP’s Bank Credit Facility. On August 4, 2014, in connection with the CSI Acquisition, CCLP entered into a credit agreement (the "CCLP Credit Agreement"), and it borrowed $210.0 million, which was used to fund, in part, CCLP's $825.0 million CSI Acquisition purchase price. In addition, the CCLP Credit Agreement borrowings were used to pay fees and expenses related to the CSI Acquisition, the CCLP Senior Notes offering, and the CCLP Credit Agreement, and to repay the $38.1 million balance outstanding under CCLP's previous revolving credit facility dated October 15, 2013, (the "Previous CCLP Credit Agreement"), which was then terminated.
Under the CCLP Credit Agreement, CCLP and CSI Compressco Sub Inc. are named as the borrowers, and all obligations under the CCLP Credit Agreement are guaranteed by all of CCLP's existing and future, direct and indirect, domestic restricted subsidiaries (other than domestic subsidiaries that are wholly owned by foreign subsidiaries). We are not a borrower or a guarantor under the CCLP Credit Agreement. The CCLP Credit Agreement matures on August 15, 2019 and includes a maximum credit commitment of $400.0 million, and included within such amount is availability for letters of credit (with a sublimit of $20.0 million) and swingline loans (with a sublimit of $60.0 million). The amount of borrowings under the CCLP Credit Agreement is subject to certain
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limitations, including borrowing limitations as a result of financial covenants. As of February 29, 2016, CCLP had a balance outstanding of $254.0 million, had approximately $2.1 million letters of credit and performance bonds, and had availability under the CCLP Credit Agreement of approximately $143.9 million.
The CCLP Credit Agreement requires CCLP to maintain (i) a minimum consolidated interest coverage ratio (ratio of consolidated earnings before interest, taxes, depreciation, and amortization ("EBITDA") to consolidated interest charges) of 3.0 to 1.0, (ii) a maximum consolidated total leverage ratio (ratio of consolidated total indebtedness to consolidated EBITDA) of 5.5 to 1.0 (with step downs to 5.0 to 1.0), and (iii) a maximum consolidated secured leverage ratio (consolidated secured indebtedness to consolidated EBITDA) of 4.0 to 1.0, in each case, as of the last day of each fiscal quarter, calculated on a trailing four quarters basis. At December 31, 2015, CCLP's leverage ratio was 4.56 to 1. In addition, the CCLP Credit Agreement includes customary negative covenants that, among other things, limit CCLP's ability to incur additional debt, incur or permit certain liens to exist, or make certain loans, investments, acquisitions, or other restricted payments. The CCLP Credit Agreement provides that CCLP can make distributions to holders of its common units, but only if there is no default or event of default under the facility.
CCLP is in compliance with all covenants and conditions of its Credit Agreement as of December 31, 2015. CCLP's continuing ability to comply with its financial covenants depends largely upon its ability to generate adequate cash flow. Historically, CCLP's financial performance has been more than adequate to meet these covenants, and CCLP expects this trend to continue. However, given the expected decreased demand for certain of CCLP's products and services by its customers in response to decreased oil and natural gas prices, CCLP has taken strategic cost reduction efforts, including headcount reductions, deferral of wage increases, wage reductions, and other efforts to reduce costs and generate cash in anticipation of the reduced demand for its products and services. Based on CCLP's projections for each of the quarterly periods in 2016 and including the impact of these cost reduction efforts to increase operating cash flows, CCLP anticipates that it will be in compliance with the financial covenants under its Credit Agreement through December 31, 2016.
CCLP 7.25% Senior Notes. In August 2014, CCLP and CSI Compressco Finance Inc., a Delaware corporation and indirect wholly owned subsidiary of CCLP (CSI Compressco Finance and, together with CCLP, the "Issuers"), issued $350.0 million aggregate principal amount of the CCLP Senior Notes in a private offering (the "Offering") exempt from the registration requirements under the Securities Act of 1933, as amended (the "Securities Act") pursuant to a Note Purchase Agreement dated July 29, 2014. The CCLP Senior Notes were subsequently registered through a public exchange offer that closed on July 20, 2015.
The obligations under the CCLP Senior Notes are jointly and severally, and fully and unconditionally, guaranteed on a senior unsecured basis by each of CCLP’s domestic restricted subsidiaries (other than CSI Compressco Finance) that guarantee CCLP’s other indebtedness (the "Guarantors" and together with the Issuers, the "Obligors"). The CCLP Senior Notes and the subsidiary guarantees thereof (together, the "CCLP Securities") were issued pursuant to an indenture described below.
The Obligors issued the CCLP Securities pursuant to the Indenture dated as of August 4, 2014, (the "Indenture") by and among the Obligors and U.S. Bank National Association, as trustee (the "Trustee"). The CCLP Senior Notes accrue interest at a rate of 7.25% per annum. Interest on the CCLP Senior Notes is payable semi-annually in arrears on February 15 and August 15 of each year, beginning February 15, 2015. The CCLP Senior Notes are scheduled to mature on August 15, 2022.
The Indenture contains customary covenants restricting CCLP’s ability and the ability of its restricted subsidiaries to: (i) pay dividends and make certain distributions, investments and other restricted payments; (ii) incur additional indebtedness or issue certain preferred shares; (iii) create certain liens; (iv) sell assets; (v) merge, consolidate, sell or otherwise dispose of all or substantially all of its assets; (vi) enter into transactions with affiliates; and (vii) designate its subsidiaries as unrestricted subsidiaries under the Indenture. The Indenture also contains customary events of default and acceleration provisions relating to such events of default, which provide that upon an event of default under the Indenture, the Trustee or the holders of at least 25% in aggregate principal amount of the CCLP Senior Notes then outstanding may declare all amounts owing under the CCLP Senior Notes to be due and payable.
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Other Sources and Uses
In addition to the aforementioned revolving credit facilities, we and CCLP fund our respective short-term liquidity requirements from cash generated by our respective operations, operating leases, and from short-term vendor financing. Should additional capital be required, we believe that we have the ability to raise such capital through the issuance of additional debt or equity. However, instability or volatility in the capital markets at the times we need to access capital may affect the cost of capital and the ability to raise capital for an indeterminable length of time. TETRA's Credit Agreement, as amended, matures in September 2019, the CCLP Credit Agreement matures in August 2019, TETRA's Senior Unsecured Notes and Senior Secured Notes, including the Series 2015 Senior Notes, mature at various dates between December 2017 and November 2022, and the CCLP Senior Notes mature in August 2022. The replacement of these capital sources at similar or more favorable terms is not certain. If it is necessary to issue equity to fund our capital needs, dilution to our common stockholders will occur.
Although near-term growth plans have been suspended and are subject to our efforts to conserve cash and rationalize our cost structure during the current period of low oil and natural gas prices, we maintain a long-term growth strategy for our core businesses. As part of our long-term strategic growth plans, we will evaluate opportunities to acquire businesses and assets that may involve the payment of cash. Such acquisitions may be funded with existing cash balances, funds under credit facilities, or cash generated from the issuance of equity or debt securities. CCLP also continues to pursue its long-term growth objectives, with funding available under its credit facilities, other borrowings, cash generated from the issuance of its common units, as well as its available cash.
CCLP’s Partnership Agreement requires that within 45 days after the end of each quarter, it distribute all of its available cash, as defined in the Partnership Agreement, to its unitholders of record on the applicable record date. During the year ended December 31, 2015, CCLP distributed approximately $68.4 million, including approximately $37.8 million to its public unitholders. In January 2016, however, the board of directors of CSI Compressco GP Inc. (CCLP's general partner and our wholly owned subsidiary) declared a cash distribution attributable to the quarter ended December 31, 2015, of $0.3775 per common unit, which represents a decrease of $0.1250 per common unit compared to the previous quarterly distribution. The amount of quarterly distributions is determined based on a variety of factors, including estimates of CCLP's cash needs to fund its future operating, investing, and debt service requirements. During the current period of low oil and natural gas pricing, there can be no assurance that quarterly distributions from CCLP will increase from this reduced amount per unit, or that there will not be future decreases in the amount of distributions going forward.
Off Balance Sheet Arrangements
An “off balance sheet arrangement” is defined as any contractual arrangement to which an entity that is not consolidated with us is a party, under which we have, or in the future may have:

• | any obligation under a guarantee contract that requires initial recognition and measurement under U.S. Generally Accepted Accounting Principles;

• | a retained or contingent interest in assets transferred to an unconsolidated entity or similar arrangement that serves as credit, liquidity, or market risk support to that entity for the transferred assets;

• | any obligation under certain derivative instruments; or

• | any obligation under a material variable interest held by us in an unconsolidated entity that provides financing, liquidity, market risk or credit risk support to us, or engages in leasing, hedging, or research and development services with us.

As of December 31, 2015 and 2014, we had no “off balance sheet arrangements” that may have a current or future material effect on our consolidated financial condition or results of operations. For a discussion of operating leases, including the lease of our corporate headquarters facility, see “Note D – Leases” in the Notes to Consolidated Financial Statements.
Commitments and Contingencies
Litigation
We are named defendants in several lawsuits and respondents in certain governmental proceedings arising in the ordinary course of business. While the outcome of lawsuits or other proceedings against us cannot be
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predicted with certainty, management does not consider it reasonably possible that a loss resulting from such lawsuits or other proceedings in excess of any amounts accrued has been incurred that is expected to have a material adverse impact on our financial condition, results of operations, or liquidity.
Environmental
One of our subsidiaries, TETRA Micronutrients, Inc. (TMI), previously owned and operated a production facility located in Fairbury, Nebraska. TMI is subject to an Administrative Order on Consent issued to American Microtrace, Inc. (n/k/a/ TETRA Micronutrients, Inc.) in the proceeding styled In the Matter of American Microtrace Corporation, EPA I.D. No. NED00610550, Respondent, Docket No. VII-98-H-0016, dated September 25, 1998 (the Consent Order), with regard to the Fairbury facility. TMI is liable for ongoing environmental monitoring at the Fairbury facility under the Consent Order; however, the current owner of the Fairbury facility is responsible for costs associated with the closure of that facility. While the outcome cannot be predicted with certainty, management does not consider it reasonably possible that a loss in excess of any amounts accrued has been incurred or is expected to have a material adverse impact on our financial condition, results of operations, or liquidity.
Product Purchase Obligations
In the normal course of our Fluids Division operations, we enter into supply agreements with certain manufacturers of various raw materials and finished products. Some of these agreements have terms and conditions that specify a minimum or maximum level of purchases over the term of the agreement. Other agreements require us to purchase the entire output of the raw material or finished product produced by the manufacturer. Our purchase obligations under these agreements apply only with regard to raw materials and finished products that meet specifications set forth in the agreements. We recognize a liability for the purchase of such products at the time we receive them. As of December 31, 2015, the aggregate amount of the fixed and determinable portion of the purchase obligation pursuant to our Fluids Division’s supply agreements was approximately $135.1 million, extending through 2029.
Other Contingencies
During 2011, in connection with the sale of a significant majority of Maritech's oil and gas producing properties, the buyers of the properties assumed the associated decommissioning liabilities pursuant to the purchase and sale agreements. For those oil and gas properties Maritech previously operated, the buyers of the properties assumed the financial responsibilities associated with the properties' operations, including abandonment and decommissioning, and generally became the successor operator. Some buyers of these Maritech properties subsequently sold certain of these properties to other buyers who also assumed these financial responsibilities associated with the properties' operations, and these buyers also typically became the successor operator of the properties. To the extent that a buyer of these properties fails to perform the abandonment and decommissioning work required, the previous owner, including Maritech, may be required to perform the abandonment and decommissioning obligation. A significant portion of the decommissioning liabilities that were assumed by the buyers of the Maritech properties in 2011 remains unperformed, and we believe the amounts of these remaining liabilities are significant. We monitor the financial condition of the buyers of these properties from Maritech, and if current oil and natural gas pricing levels continue, we expect that one or more of these buyers may be unable to perform the decommissioning work required on the properties acquired from Maritech.
During 2015, continued low oil and natural gas prices have resulted in reduced revenues and cash flows for all oil and gas producing companies, including those companies that bought Maritech properties in the past. Certain of these oil and gas producing companies that bought Maritech properties are currently experiencing severe financial difficulties. With regard to certain of these properties, Maritech has security in the form of bonds or cash escrows intended to secure the buyers' obligations to perform the decommissioning work. One company that bought, and subsequently sold, Maritech properties filed for Chapter 11 bankruptcy protection in August 2015. Maritech and its legal counsel monitor the status of these companies. As of December 31, 2015, we do not consider the likelihood of Maritech becoming liable for decommissioning liabilities on sold properties to be probable.
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Contractual Obligations
The table below summarizes our consolidated contractual cash obligations as of December 31, 2015:

|  | Payments Due
|  | Total |  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | Thereafter
|  | (In Thousands)
Long-term debt - TETRA |  | $ | 292,921 |  |  | $ | — |  |  | $ | 46,944 |  |  | $ | — |  |  | $ | 72,850 |  |  | $ | 53,056 |  |  | $ | 120,071 |
Long-term debt - CCLP |  | 580,481 |  |  | — |  |  | — |  |  | — |  |  | 235,000 |  |  | — |  |  | 345,481 |
Interest on debt - TETRA |  | 118,784 |  |  | 21,552 |  |  | 21,552 |  |  | 19,163 |  |  | 17,186 |  |  | 14,016 |  |  | 25,315 |
Interest on debt - CCLP |  | 189,300 |  |  | 31,134 |  |  | 31,134 |  |  | 31,134 |  |  | 29,105 |  |  | 25,047 |  |  | 41,746 |
Purchase obligations |  | 135,142 |  |  | 12,283 |  |  | 11,203 |  |  | 9,328 |  |  | 9,328 |  |  | 9,300 |  |  | 83,700 |
Decommissioning and other asset retirement obligations(1) |  | 57,449 |  |  | 14,570 |  |  | 29,446 |  |  | — |  |  | 1,269 |  |  | 3,086 |  |  | 9,078 |
Operating and capital leases |  | 103,109 |  |  | 21,302 |  |  | 11,976 |  |  | 8,908 |  |  | 7,138 |  |  | 6,498 |  |  | 47,287 |
Total contractual cash obligations(2) |  | $ | 1,477,186 |  |  | $ | 100,841 |  |  | $ | 152,255 |  |  | $ | 68,533 |  |  | $ | 371,876 |  |  | $ | 111,003 |  |  | $ | 672,678 |

(1) | We have estimated the timing of these payments for decommissioning liabilities based upon our plans and the plans of outside operators, which are subject to many changing variables, including the estimated life of the producing oil and gas properties, which is affected by changing oil and gas commodity prices. The amounts shown represent the undiscounted obligation as of December 31, 2015.

(2) | Amounts exclude other long-term liabilities reflected in our Consolidated Balance Sheet that do not have known payment streams. These excluded amounts include approximately $4.1 million of liabilities under FASB Codification Topic 740, “Accounting for Uncertainty in Income Taxes,” as we are unable to reasonably estimate the ultimate amount or timing of settlements. See “Note E – Income Taxes,” in the Notes to Consolidated Financial Statements for further discussion.

New Accounting Pronouncements
For a discussion of new accounting pronouncements that may affect our consolidated financial statements, see "Note B - Summary of Significant Accounting Policies, New Accounting Pronouncements," contained in this Annual Report.
Item 7A. Quantitative and Qualitative Disclosures about Market Risk.
Interest Rate Risk
As of December 31, 2015, we had approximately $22.9 million of outstanding borrowings pursuant to our revolving credit facility, and CCLP had approximately $235.0 million of outstanding borrowings pursuant to its revolving credit facility. Each of these borrowings bears interest at an agreed-upon percentage rate spread above LIBOR, and is therefore subject to market risk exposure related to changes in applicable interest rates.
The following table sets forth as of December 31, 2015, our principal cash flows for our and CCLP's long-term debt obligations (which bear a variable rate of interest) and weighted average effective interest rates by their expected maturity dates. Neither we nor CCLP is a party to an interest rate swap contract or other derivative instrument designed to hedge our or their exposure to interest rate fluctuation risk.
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|  | Expected Maturity Date |  |  |  | Fair Market Value
|  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | Thereafter |  | Total |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. dollar variable rate - TETRA |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 22,850 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,850 |  |  | $ | 22,850 |
U.S. dollar variable rate - CCLP |  | — |  |  | — |  |  | — |  |  | $ | 235,000 |  |  | — |  |  | — |  |  | 235,000 |  |  | 235,000 |
Euro variable rate (in $US) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Weighted average interest rate (variable) |  | — |  |  | — |  |  | — |  |  | 3.25 | % |  | — |  |  | — |  |  | — |  |  |  |
U.S. dollar fixed rate - TETRA |  | $ | — |  |  | $ | 46,944 |  |  | $ | — |  |  | $ | 50,000 |  |  | $ | 53,056 |  |  | $ | 120,071 |  |  | $ | 270,071 |  |  | $ | 229,800 |
U.S. dollar fixed rate - CCLP |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 345,481 |  |  | $ | 345,481 |  |  | $ | 259,900 |
Weighted average interest rate (fixed) |  | — |  |  | 5.090 | % |  | — |  |  | 5.750 | % |  | — |  |  | 8.217 | % |  | — |  |  |  |
Variable to fixed swaps |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Fixed pay rate |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Variable receive rate |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |

Exchange Rate Risk
We are exposed to fluctuations between the U.S. dollar and the euro with regard to our euro-denominated operating activities. We also have currency exchange rate risk exposure related to revenues, expenses, operating receivables, and payables denominated in foreign currencies. We and CCLP enter into 30-day foreign currency forward derivative contracts as part of a program designed to mitigate the currency exchange rate risk exposure on selected transactions of certain foreign subsidiaries. As of December 31, 2015, we and CCLP had the following foreign currency derivative contracts outstanding relating to a portion of our foreign operations:

Derivative Contracts |  | US Dollar Notional Amount |  | Traded Exchange Rate |  | Settlement Date
|  | (In Thousands) |  |  |  |
Forward purchase euro |  | $ | 3,768 |  |  | 1.11 |  | 1/19/2016
Forward purchase pounds sterling |  | 12,614 |  |  | 1.52 |  | 1/19/2016
Forward purchase Mexican peso |  | 7,850 |  |  | 17.45 |  | 1/19/2016
Forward purchase Saudi Arabia riyal |  | 5,040 |  |  | 3.74 |  | 1/5/2016
Forward sale Mexican peso |  | 4,641 |  |  | 17.45 |  | 1/19/2016

Under this program, we and CCLP may enter into similar derivative contracts from time to time. Although contracts pursuant to this program will serve as an economic hedge of the cash flow of our currency exchange risk exposure, they will not be formally designated as hedge contracts or qualify for hedge accounting treatment. Accordingly, any change in the fair value of these derivative instruments during a period will be included in the determination of earnings for that period.
The fair value of foreign currency derivative instruments are based on quoted market values as reported to us by our counterparty. The fair values of our foreign currency derivative instruments as of December 31, 2015, are as follows:

Foreign currency derivative instruments | Balance Sheet Location |  | Fair Value at December 31, 2015
|  |  |  | (In Thousands)
Forward purchase contracts |  | Current assets |  | $ | — |
Forward sale contracts |  | Current assets |  | 23 |
Forward sale contracts |  | Current liabilities |  | (31 | )
Forward purchase contracts |  | Current liabilities |  | (354 | )
Total |  |  |  | $ | (362 | )

Based on the derivative contracts that were in place as of December 31, 2015, a five percent devaluation of the Euro compared to the U.S. dollar would result in a decrease in the market value of our forward sale contract of
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$0.2 million. A five percent devaluation of the British pound sterling compared to the U.S. dollar would result in a decrease in the market value of our forward sale contract of $0.6 million. A five percent devaluation of the Mexican peso compared to the U.S. dollar would result in a decrease in the market value of our forward purchase contract of $(0.4) million. A five percent devaluation of the Saudi Riyal compared to the U.S. dollar would result in a decrease in the market value of our forward purchase contract of $(0.2) million. A five percent devaluation of the Mexican peso compared to the U.S. dollar would result in a decrease in the market value of our forward sale contracts of $0.2 million.
Commodity Price Risk
We are exposed to the commodity price risk associated with Maritech’s oil and natural gas production on its remaining properties. Due to the minimal amount of production, such commodity price risk exposure is not significant.
Item 8. Financial Statements and Supplementary Data.
Our financial statements and supplementary data for us and our subsidiaries required to be included in this Item 8 are set forth in Item 15 of this Report.
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
None.
Item 9A. Controls and Procedures.
Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures
Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act") as of the end of the period covered by this report. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of December 31, 2015.
Management’s Report on Internal Control over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2015, was conducted based on the framework in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) ("COSO"). Based on this assessment, management has determined that our internal control over financial reporting was effective as of December 31, 2015.
Ernst & Young LLP, our independent registered public accounting firm, has issued an attestation report on the effectiveness of our internal control over financial reporting as of December 31, 2015. Ernst & Young LLP's report on our internal control over financial reporting is included herein.
Changes in Internal Control over Financial Reporting
During 2015, we enhanced our internal control processes over the computation of equity-based compensation expense, converting from a manual calculation of the overall impact of forfeitures and vesting on the amount of expense, to a software system solution designed to compute expense on an individual participant basis.
On August 4, 2014 we completed the acquisition of CSI. During the year ended December 31, 2015, we implemented controls and procedures related to the CSI business as part of our integration of CSI into our internal control over financial reporting processes.
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As a part of the integration of CSI into our internal control over financial reporting processes, we enhanced CSI's information technology general control systems by remediating deficiencies in user access setup and restriction controls that if not remediated would have been a material weakness as of December 31, 2015.
Other than the changes described above related to the integration of CSI into our internal control over financial reporting processes and the conversion to a software system solution to compute equity-based compensation expense, there were no changes in our internal control over financial reporting that occurred during the fiscal quarter ended December 31, 2015, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
Item 9B. Other Information.
During the fourth quarter of 2015, as part of our annual assessment of goodwill impairment conducted in connection with the preparation of our financial statements for the period ended December 31, 2015, we determined that our Compression and Production Testing reporting units had carrying values in excess of their estimated fair values as a result of expected reduced demand for their products and services in response to decreased oil and natural gas prices. Based on our analysis, we concluded that an impairment totaling $177.0 million of recorded goodwill for these reporting units was required. This impairment was recorded during the fourth quarter of 2015.
Also during the fourth quarter of 2015, and in connection with the preparation of our financial statements for the period ended December 31, 2015, our Compression, Production Testing, and Fluids reporting units recorded impairments totaling approximately $44.2 million, primarily associated with a portion of the carrying values of certain equipment and certain identified intangible assets for these reporting units.
The impairment charges described above are not expected to result in future capital expenditures. For additional information, see "Note B - "Summary of Significant Accounting Policies, Goodwill and Impairment of Long-Lived Assets" contained in the Notes to Consolidated Financial Statements.
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PART III
Item 10. Directors, Executive Officers, and Corporate Governance.
The information required by this Item is hereby incorporated by reference from the information appearing under the captions “Proposal No. 1: Election of Directors,” “Executive Officers,” “Corporate Governance,” “Board Meetings and Committees,” and “Section 16(a) Beneficial Ownership Reporting Compliance” in our definitive proxy statement (the "Proxy Statement") for the annual meeting of stockholders to be held on May 3, 2016, which involves the election of directors and is to be filed with the Securities and Exchange Commission ("SEC") pursuant to the Securities Exchange Act of 1934 as amended (the "Exchange Act") within 120 days of the end of our fiscal year on December 31, 2015.
Item 11. Executive Compensation.
The information required by this Item is hereby incorporated by reference from the information appearing under the captions “Management and Compensation Committee Report,” “Management and Compensation Committee Interlocks and Insider Participation,” “Compensation Discussion and Analysis,” “Compensation of Executive Officers,” and “Director Compensation” in our Proxy Statement. Notwithstanding the foregoing, in accordance with the instructions to Item 407 of Regulation S-K, the information contained in our Proxy Statement under the subheading “Management and Compensation Committee Report” shall be deemed furnished, and not filed, in this Form 10-K, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, or the Exchange Act, as a result of this furnishing, except to the extent we specifically incorporate it by reference.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
The information required by this Item is hereby incorporated by reference from the information appearing under the captions “Beneficial Stock Ownership of Certain Stockholders and Management” and “Equity Compensation Plan Information” in our Proxy Statement.
Item 13. Certain Relationships and Related Transactions, and Director Independence.
The information required by this Item is hereby incorporated by reference from the information appearing under the captions “Certain Transactions” and “Director Independence” in our Proxy Statement.
Item 14. Principal Accounting Fees and Services.
The information required by this Item is hereby incorporated by reference from the information appearing under the caption “Fees Paid to Principal Accounting Firm” in our Proxy Statement.
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PART IV
Item 15. Exhibits and Financial Statement Schedules.
(a) List of documents filed as part of this Report

1. | Financial Statements of the Company |
|  | Page
| Reports of Independent Registered Public Accounting Firm | F-1
| Consolidated Balance Sheets at December 31, 2015 and 2014 | F-3
| Consolidated Statements of Operations for the years ended December 31, 201 5, 2014, 2013 | F-5
| Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 201 5, 2014, 2013 | F-6
| Consolidated Statements of Equity for the years ended December 31, 201 5, 2014, 2013 | F-7
| Consolidated Statements of Cash Flows for the years ended December 31, 201 5, 2014, 2013 | F-8
| Notes to Consolidated Financial Statements | F-9
2. | Financial statement schedules |
| Schedule I - Condensed Financial Information of Registrant (Parent Only) | F-54
| All other schedules for which provision is made in the applicable accounting regulation of the Securities and Exchange Commission are not required under the related instructions or are inapplicable and therefore have been omitted. |
3. | List of Exhibits |

3.1 | Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Registration Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
3.2 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Registration Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
3.3 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2003 filed on March 15, 2004 (SEC File No. 001-13455)).
3.4 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.4 to the Company’s Registration Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
3.5 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.5 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
3.6 | Amended and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.6 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
3.7 | Certificate of Elimination, dated March 13, 2013, relating to the Series One Junior Participating Preferred Stock (incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed on March 13, 2013 (SEC File No. 001-13455)).
4.1 | Note Purchase Agreement, dated April 30, 2008, by and among TETRA Technologies, Inc. and The Prudential Insurance Company of America, Physicians Mutual Insurance Company, The Lincoln National Life Insurance Company, The Guardian Life Insurance Company of America, The Guardian Insurance & Annuity Company, Inc., Massachusetts Mutual Life Insurance Company, Hakone Fund II LLC, C.M. Life Insurance Company, Pacific Life Insurance Company, United of Omaha Life Insurance Company, Companion Life Insurance Company, United World Life Insurance Company, Country Life Insurance Company, The Ohio National Life Insurance Company and Ohio National Life Assurance Corporation (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).
4.2 | Form of 6.30% Senior Notes, Series 2008-A, due April 30, 2013 (incorporated by reference to Exhibit 4.2 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).

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4.3 | Form of 6.56% Senior Notes, Series 2008-B, due April 30, 2015 (incorporated by reference to Exhibit 4.3 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).
4.4 | Form of Subsidiary Guarantee dated as of April 30, 2008, executed by Beacon Resources, LLC, Compressco Field Services, Inc., EPIC Diving and Marine Services, LLC, Maritech Resources, Inc., TETRA Applied Technologies, LLC, TETRA International Incorporated, TETRA Process Services, L.C., TETRA Production Testing Services, LLC, and Maritech Timbalier Bay, LP, for the benefit of the holders of the Notes (incorporated by reference to Exhibit 4.4 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 0001-13455)).
4.5 | Note Purchase Agreement, dated September 30, 2010, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company, Teachers Insurance and Annuity Association of America, Wells Fargo Bank, N.A., The Guardian National Life Insurance Company of America, The Guardian Insurance & Annuity Company, Inc., Southern Farm Bureau Life Insurance Company, Primerica Life Insurance Company, Prime Reinsurance Company, Inc., Senior Health Insurance Company of Pennsylvania, The Union Central Life Insurance Company, Ameritas Life Insurance Corp., Acacia Life Insurance Company and First Ameritas Life Insurance Corp. of New York (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.6 | Form of 5.09% Senior Notes, Series 2010-A, due December 15, 2017 (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.7 | Form of 5.67% Senior Notes, Series 2010-B, due December 15, 2020 (incorporated by reference to Exhibit 4.3 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.8 | Note Purchase Agreement, dated April 29, 2013, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company and Lincoln Life & Annuity Company of New York (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.9 | First Amendment to Note Purchase Agreement dated and effective as of April 29, 2013, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company and Lincoln Life & Annuity Company of New York (incorporated by reference to Exhibit 4.2 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.10 | Form of 4.00% Senior Notes due April 29, 2020 (incorporated by reference to Exhibit 4.3 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.11 | Subsidiary Guaranty dated April 29, 2013, executed by Compressco Field Services, L.L.C., EPIC Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders of the 4.00% Senior Notes due April 29, 2020 (incorporated by reference to Exhibit 4.4 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.12 | Senior Secured Note due April 1, 2017 (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
4.13 | Subsidiary Guaranty dated April 30, 2015, executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA International Incorporated, TETRA Production Testing Services, LLC and TETRA Applied Technologies, LLC, in favor of Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative for the benefit of the noteholders (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
4.14 | Note Purchase Agreement, dated November 5, 2015, by and between TETRA Technologies, Inc. and GSO Tetra Holdings LP (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.15 | Form of 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.16 | Second Amendment to Note Purchase Agreement dated as of November 5, 2015, by and among TETRA Technologies, Inc., Wells Fargo Energy Capital, Inc. and certain other noteholders party thereto (incorporated by reference to Exhibit 4.3 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.17 | Form of Subsidiary Guaranty to be executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders of the 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.4 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.18 | Form of 11.00% Senior Note due November 5, 2022 (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on November 20, 2015 (SEC File No. 001-13455)).

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4.19 | Subsidiary Guaranty dated November 20, 2015, executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders from time to time of the 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on November 20, 2015 (SEC File No. 001-13455)).
10.1*** | 1996 Stock Option Plan for Nonexecutive Employees and Consultants (incorporated by reference to Exhibit 99.1 to the Company’s Registration Statement on Form S-8 filed on November 19, 1997 (SEC File No. 333-61988)).
10.2*** | TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
10.3*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, and Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 10.1, 10.2, and 10.3 to the Company’s Form 8-K filed on May 8, 2006 (SEC File No. 001-13455)).
10.4 | Credit Agreement, as amended and restated, dated as of June 27, 2006, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A., as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 30, 2006 (SEC File No. 001-13455)).
10.5 | Agreement and First Amendment to Credit Agreement, dated as of December 15, 2006, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A., as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on January 10, 2007 (SEC File No. 001-13455)).
10.6+*** | Summary Description of the Compensation of Non-Employee Directors of TETRA Technologies, Inc.
10.7+*** | Summary Description of Named Executive Officer Compensation.
10.8*** | TETRA Technologies, Inc. Nonqualified Deferred Compensation Plan (incorporated by reference to Exhibit 10.9 to the Company’s Form 10-Q filed on August 13, 2002 (SEC File No. 001-13455)).
10.9*** | TETRA Technologies, Inc. Nonqualified Deferred Compensation Plan and The Executive Excess Plan Adoption Agreement effective on June 30, 2005 (incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q/A filed on March 16, 2006 (SEC File No. 001-13455)).
10.10*** | TETRA Technologies, Inc. 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 4, 2007 (SEC File No. 333-142637)).
10.11*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, and Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 4.13, 4.14, and 4.15 to the Company’s Registration Statement on Form S-8 filed on May 4, 2007 (SEC File No. 333-142637)).
10.12*** | TETRA Technologies, Inc. 401(k) Retirement Plan, as amended and restated (incorporated by reference to Exhibit 99.1 to the Company’s Registration Statement on Form S-8 filed on February 22, 2008 (SEC File No. 333-149348)).
10.13*** | TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 9, 2008 (SEC File No. 333-150783)).
10.14*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 4.13, 4.14, 4.15 and 4.16 to the Company’s Registration Statement on Form S-8 filed on May 9, 2008 (SEC File No. 333-150783)).
10.15*** | TETRA Technologies, Inc. Cash Incentive Compensation Plan (incorporated by reference to Exhibit 4.1 to the Company’s Form 10-Q filed on May 10, 2010 (SEC File No. 001-13455)).
10.16*** | TETRA Technologies, Inc. 2007 Long Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on May 5, 2010 (SEC File No. 333-166537)).

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10.17*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Consultant Nonqualified Stock Option Agreement, Non-Employee Consultant Restricted Stock Agreement, and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. 2007 Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.12, 4.13, 4.14, 4.15, 4.16 and 4.17 to the Company’s Registration Statement on Form S-8 filed on May 5, 2010 (SEC File No. 333-166537)).
10.18 | Agreement and Second Amendment to Credit Agreement dated as of October 29, 2010, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A. as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on November 3, 2010 (SEC File No. 001-13455)).
10.19 | Contribution, Conveyance and Assumption Agreement, dated June 20, 2011, by and among Compressco, Inc., Compressco Field Services, Inc., Compressco Canada, Inc., Compressco de Mexico, S. de R.L. de C.V., Compressco Partners GP Inc., Compressco Partners, L.P., Compressco Partners Operating, LLC, Compressco Netherlands B.V., Compressco Holdings, LLC, Compressco Netherlands Cooperatief U.A., Compressco Partners Sub, Inc., TETRA International Incorporated, Production Enhancement Mexico, S. de R.L. de C.V. and TETRA Technologies, Inc. (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 30, 2011 (SEC File No. 001-13455)).
10.20 | Omnibus Agreement dated June 20, 2011, by and among Compressco Partners, L.P., TETRA Technologies, Inc. and Compressco Partners GP Inc. (incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K filed on June 30, 2011 (SEC File No. 001-13455)).
10.21 | Purchase and Sale Agreement, dated April 1, 2011, by and between Maritech Resources, Inc. as Seller and Tana Exploration Company LLC as Buyer (incorporated by reference to Exhibit 10.3 to the Company’s Form 10-Q filed on August 9, 2011 (SEC File No. 001-13455)).
10.22*** | TETRA Technologies, Inc. 2011 Long-Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on May 10, 2011 (SEC File No. 333-174090)).
10.23*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Consultant Nonqualified Stock Option Agreement, Non-Employee Consultant Restricted Stock Agreement and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. 2011 Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.12, 4.13, 4.14, 4.15, 4.16 and 4.17 to the Company’s Registration Statement on Form S-8 filed on May 10, 2011 (SEC File No. 333-174090)).
10.24*** | Employee Restricted Stock Agreement between TETRA Technologies, Inc. and Peter J. Pintar dated November 15, 2011 (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on November 15, 2011 (SEC File No. 333-177995)).
10.25*** | Separation and Release Agreement dated July 31, 2012 by and between TETRA Technologies, Inc. and Joseph M. Abell (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on August 1, 2012 (SEC File No. 001-13455)).
10.26*** | Employee Equity Award Agreement dated August 15, 2012 by and between TETRA Technologies, Inc. and Elijio V. Serrano (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on August 16, 2012 (SEC File No. 001-13455)).
10.27+ | Purchase and Sale Agreement dated December 31, 2012 by and between TETRA Technologies, Inc. and Tetris Property LP.
10.28+ | Lease Agreement dated December 31, 2012 by and between Tetris Property LP and TETRA Technologies, Inc.
10.29*** | TETRA Technologies, Inc. 2011 Amended and Restated Long Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.9 to the Company’s Registration Statement on Form S-8 filed on May 9, 2013 (SEC File No. 333-188494)).
10.30*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Director Restricted Stock Agreement, Non-Employee Nonqualified Stock Option Agreement and Non-Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2011 Amended and Restated Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.10, 4.11, 4.12, 4.13, 4.14 and 4.15, respectively to the Company’s Registration Statement on Form S-8 filed on May 9, 2013 (SEC File No. 333-188494)).
10.31*** | Form of Change in Control Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 4, 2013 (SEC File No. 001-13455)).

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10.32 | Credit Agreement, dated October 15, 2013, by and among Compressco Partners, L.P., Compressco Partners Operating, LLC, Compressco Partners Sub, Inc., Compressco Holdings, LLC, Compressco Leasing, LLC, Compressco Field Services International, LLC, and Compressco International, LLC, as the borrowers, JP Morgan Chase Bank, N.A., as Administrative Agent, and JPMorgan Chase Bank, N.A., Bank of America, N.A., and PNC Bank, National Association, as lenders (incorporated by reference to Exhibit 10.1 to Compressco Partners, L.P.’s Current Report on Form 8-K filed on October 18, 2013 (SEC File No. 001-35195)).
10.33*** | Employee Restricted Stock Award Agreement dated June 16, 2014 by and between TETRA Technologies, Inc. and Joseph Elkhoury (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on June 16, 2014 (SEC File No. 001-13455)).
10.34 | First Amendment to Omnibus Agreement, dated June 20, 2014, by and among TETRA Technologies, Inc., Compressco Partners, L.P., and Compressco Partners GP Inc. (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on June 26, 2014 (SEC File No. 001-13455)).
10.35 | Stock Purchase Agreement, dated as of July 20, 2014, by and between Warren Equipment Company and Compressco Partners Sub, Inc. (incorporated by reference to Exhibit 2.1 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).
10.36 | Indenture, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and U.S. Bank National Association, as Trustee (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.37 | Registration Rights Agreement, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.38 | Guaranty, dated July 20, 2014, by Compressco Partners, L.P. in favor of Warren Equipment Company (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).
10.39 | Contribution and Unit Purchase Agreement, dated as of July 20, 2014, by and among Compressco Partners, L.P., Compresso Partners GP, Inc. and TETRA Technologies, Inc. (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).
10.40 | Purchase Agreement, dated as of July 29, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated as representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.41 | Purchase Agreement Joinder, dated as of August 4, 2014, by and among the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as Representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.42 | Credit Agreement, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Partners Sub, Inc., the lenders from time to time party thereto, Bank of America, N.A., in its capacity as administrative agent for the lenders and collateral agent, and the other parties thereto (incorporated by reference to Exhibit 10.3 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.43 | Agreement and Third Amendment to Credit Agreement dated as of September 30, 2014, among TETRA Technologies, Inc. and certain of its subsidiaries as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association, as syndication agent, Comerica Bank, as documentation agent, and the lender parties thereto (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on October 6, 2014 (SEC File No. 001-13455)).
10.44*** | Separation and Release Agreement with Edwin H. Goldman dated January 26, 2015 (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on January 30, 2015 (SEC File No. 001-13455)).
10.45 | Note Purchase Agreement, dated March 18, 2015, by and among TETRA Technologies, Inc., Wells Fargo Energy Capital, Inc., as Noteholder Representative, and Wells Fargo Energy Capital, Inc. as the sole Initial Purchaser listed on Schedule A thereto (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on March 24, 2015 (SEC File No. 001-13455)).
10.46 | Pledge and Security Agreement, dated as of April 30, 2015, by and among TETRA Technologies, Inc., Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA International Incorporated, TETRA Production Testing Services, LLC, CSI Compressco GP Inc., TETRA Applied Technologies, LLC and CSI Compressco Investment LLC, as the grantors, and Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative and collateral agent (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
10.47 | Registration Rights Agreement, dated as of April 30, 2015, by and among CSI Compressco LP, TETRA Technologies, Inc., and Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
10.48*** | TETRA Technologies, Inc. Amended and Restated 2007 Long Term Incentive Compensation Plan, as amended through February 20, 2015 (incorporated by reference to Exhibit 10.3 to the Company's Form 10-Q filed on August 10, 2015 (SEC File No. 001-13455)).

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10.49*** | TETRA Technologies, Inc. Second Amended and Restated 2011 Long Term Incentive Compensation Plan, as amended through February 20, 2015 (incorporated by reference to Exhibit 10.4 to the Company's Form 10-Q filed on August 10, 2015 (SEC File No. 001-13455)).
21+ | Subsidiaries of the Company.
23.1+ | Consent of Ernst & Young, LLP.
31.1+ | Certification Pursuant to Rule 13(a)-14(a) or 15(d)-14(a) of the Exchange Act, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2+ | Certification Pursuant to Rule 13(a)-14(a) or 15(d)-14(a) of the Exchange Act, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1** | Certification Furnished Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chief Executive Officer).
32.2** | Certification Furnished Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chief Financial Officer).
101.INS++ | XBRL Instance Document.
101.SCH++ | XBRL Taxonomy Extension Schema Document.
101.CAL++ | XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB++ | XBRL Taxonomy Extension Label Linkbase Document.
101.PRE++ | XBRL Taxonomy Extension Presentation Linkbase Document.
101.DEF++ | XBRL Taxonomy Extension Definition Linkbase Document.

+ | Filed with this report

** | Furnished with this report.

*** | Management contract or compensatory plan or arrangement.

++ | Attached as Exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language): (i) Consolidated Statements of Operations for the years ended December 31, 2015, 2014 and 2013; (ii) Consolidated Balance Sheets as of December 31, 2015 and December 31, 2014; (iii) Consolidated Statements of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013; (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013; (v) Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2015, 2014 and 2013; and (vi) Notes to Consolidated Financial Statements for the year ended December 31, 2015.

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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, TETRA Technologies, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  | TETRA Technologies, Inc.
Date: | March 4, 2016 | By: | /s/Stuart M. Brightman
|  |  | Stuart M. Brightman, President & CEO

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated:

Signature | Title | Date
/s/William D. Sullivan | Chairman of | March 4, 2016
William D. Sullivan | the Board of Directors |
/s/Stuart M. Brightman | President, Chief Executive | March 4, 2016
Stuart M. Brightman | Officer and Director |
| (Principal Executive Officer) |
/s/Elijio V. Serrano | Senior Vice President and | March 4, 2016
Elijio V. Serrano | Chief Financial Officer |
| (Principal Financial Officer) |
/s/Ben C. Chambers | Vice President – Accounting | March 4, 2016
Ben C. Chambers | and Controller |
| (Principal Accounting Officer) |
/s/Mark E. Baldwin | Director | March 4, 2016
Mark E. Baldwin |  |
/s/Thomas R. Bates, Jr. | Director | March 4, 2016
Thomas R. Bates, Jr. |  |
/s/Paul D. Coombs | Director | March 4, 2016
Paul D. Coombs |  |
/s/Ralph S. Cunningham | Director | March 4, 2016
Ralph S. Cunningham |  |
/s/John F. Glick | Director | March 4, 2016
John F. Glick |  |
/s/Stephen A. Snider | Director | March 4, 2016
Stephen A. Snider |  |
/s/Kenneth E. White, Jr. | Director | March 4, 2016
Kenneth E. White, Jr. |  |
/s/Joseph C. Winkler III | Director | March 4, 2016
Joseph C. Winkler III |  |

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EXHIBIT INDEX

3.1 | Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Registration Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
3.2 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Registration Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
3.3 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2003 filed on March 15, 2004 (SEC File No. 001-13455)).
3.4 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.4 to the Company’s Registration Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
3.5 | Certificate of Amendment of Restated Certificate of Incorporation of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.5 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
3.6 | Amended and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference to Exhibit 4.6 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
3.7 | Certificate of Elimination, dated March 13, 2013, relating to the Series One Junior Participating Preferred Stock (incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed on March 13, 2013 (SEC File No. 001-13455)).
4.1 | Note Purchase Agreement, dated April 30, 2008, by and among TETRA Technologies, Inc. and The Prudential Insurance Company of America, Physicians Mutual Insurance Company, The Lincoln National Life Insurance Company, The Guardian Life Insurance Company of America, The Guardian Insurance & Annuity Company, Inc., Massachusetts Mutual Life Insurance Company, Hakone Fund II LLC, C.M. Life Insurance Company, Pacific Life Insurance Company, United of Omaha Life Insurance Company, Companion Life Insurance Company, United World Life Insurance Company, Country Life Insurance Company, The Ohio National Life Insurance Company and Ohio National Life Assurance Corporation (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).
4.2 | Form of 6.30% Senior Notes, Series 2008-A, due April 30, 2013 (incorporated by reference to Exhibit 4.2 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).
4.3 | Form of 6.56% Senior Notes, Series 2008-B, due April 30, 2015 (incorporated by reference to Exhibit 4.3 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 001-13455)).
4.4 | Form of Subsidiary Guarantee dated as of April 30, 2008, executed by Beacon Resources, LLC, Compressco Field Services, Inc., EPIC Diving and Marine Services, LLC, Maritech Resources, Inc., TETRA Applied Technologies, LLC, TETRA International Incorporated, TETRA Process Services, L.C., TETRA Production Testing Services, LLC, and Maritech Timbalier Bay, LP, for the benefit of the holders of the Notes (incorporated by reference to Exhibit 4.4 to the Company’s Form 8-K filed on May 5, 2008 (SEC File No. 0001-13455)).
4.5 | Note Purchase Agreement, dated September 30, 2010, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company, Teachers Insurance and Annuity Association of America, Wells Fargo Bank, N.A., The Guardian National Life Insurance Company of America, The Guardian Insurance & Annuity Company, Inc., Southern Farm Bureau Life Insurance Company, Primerica Life Insurance Company, Prime Reinsurance Company, Inc., Senior Health Insurance Company of Pennsylvania, The Union Central Life Insurance Company, Ameritas Life Insurance Corp., Acacia Life Insurance Company and First Ameritas Life Insurance Corp. of New York (incorporated by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.6 | Form of 5.09% Senior Notes, Series 2010-A, due December 15, 2017 (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.7 | Form of 5.67% Senior Notes, Series 2010-B, due December 15, 2020 (incorporated by reference to Exhibit 4.3 to the Company’s Current Report on Form 8-K filed on October 8, 2010 (SEC File No. 001-13455)).
4.8 | Note Purchase Agreement, dated April 29, 2013, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company and Lincoln Life & Annuity Company of New York (incorporated by reference to Exhibit 4.1 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).

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4.9 | First Amendment to Note Purchase Agreement dated and effective as of April 29, 2013, by and among TETRA Technologies, Inc. and The Lincoln National Life Insurance Company and Lincoln Life & Annuity Company of New York (incorporated by reference to Exhibit 4.2 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.10 | Form of 4.00% Senior Notes due April 29, 2020 (incorporated by reference to Exhibit 4.3 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.11 | Subsidiary Guaranty dated April 29, 2013, executed by Compressco Field Services, L.L.C., EPIC Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders of the 4.00% Senior Notes due April 29, 2020 (incorporated by reference to Exhibit 4.4 to the Company’s Form 8-K filed on May 3, 2013 (SEC File No. 001-13455)).
4.12 | Senior Secured Note due April 1, 2017 (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
4.13 | Subsidiary Guaranty dated April 30, 2015, executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA International Incorporated, TETRA Production Testing Services, LLC and TETRA Applied Technologies, LLC, in favor of Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative for the benefit of the noteholders (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
4.14 | Note Purchase Agreement, dated November 5, 2015, by and between TETRA Technologies, Inc. and GSO Tetra Holdings LP (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.15 | Form of 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.16 | Second Amendment to Note Purchase Agreement dated as of November 5, 2015, by and among TETRA Technologies, Inc., Wells Fargo Energy Capital, Inc. and certain other noteholders party thereto (incorporated by reference to Exhibit 4.3 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.17 | Form of Subsidiary Guaranty to be executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders of the 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.4 to the Company's Form 8-K filed on November 6, 2015 (SEC File No. 001-13455)).
4.18 | Form of 11.00% Senior Note due November 5, 2022 (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on November 20, 2015 (SEC File No. 001-13455)).
4.19 | Subsidiary Guaranty dated November 20, 2015, executed by Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA Applied Technologies, LLC, TETRA International Incorporated and TETRA Production Testing Services, LLC, in favor of the holders from time to time of the 11.00% Senior Notes due November 5, 2022 (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on November 20, 2015 (SEC File No. 001-13455)).
10.1*** | 1996 Stock Option Plan for Nonexecutive Employees and Consultants (incorporated by reference to Exhibit 99.1 to the Company’s Registration Statement on Form S-8 filed on November 19, 1997 (SEC File No. 333-61988)).
10.2*** | TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
10.3*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, and Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 10.1, 10.2, and 10.3 to the Company’s Form 8-K filed on May 8, 2006 (SEC File No. 001-13455)).
10.4 | Credit Agreement, as amended and restated, dated as of June 27, 2006, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A., as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 30, 2006 (SEC File No. 001-13455)).
10.5 | Agreement and First Amendment to Credit Agreement, dated as of December 15, 2006, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A., as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on January 10, 2007 (SEC File No. 001-13455)).
10.6+*** | Summary Description of the Compensation of Non-Employee Directors of TETRA Technologies, Inc.

73

10.7+*** | Summary Description of Named Executive Officer Compensation.
10.8*** | TETRA Technologies, Inc. Nonqualified Deferred Compensation Plan (incorporated by reference to Exhibit 10.9 to the Company’s Form 10-Q filed on August 13, 2002 (SEC File No. 001-13455)).
10.9*** | TETRA Technologies, Inc. Nonqualified Deferred Compensation Plan and The Executive Excess Plan Adoption Agreement effective on June 30, 2005 (incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q/A filed on March 16, 2006 (SEC File No. 001-13455)).
10.10*** | TETRA Technologies, Inc. 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 4, 2007 (SEC File No. 333-142637)).
10.11*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, and Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 4.13, 4.14, and 4.15 to the Company’s Registration Statement on Form S-8 filed on May 4, 2007 (SEC File No. 333-142637)).
10.12*** | TETRA Technologies, Inc. 401(k) Retirement Plan, as amended and restated (incorporated by reference to Exhibit 99.1 to the Company’s Registration Statement on Form S-8 filed on February 22, 2008 (SEC File No. 333-149348)).
10.13*** | TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibit 4.12 to the Company’s Registration Statement on Form S-8 filed on May 9, 2008 (SEC File No. 333-150783)).
10.14*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan (incorporated by reference to Exhibits 4.13, 4.14, 4.15 and 4.16 to the Company’s Registration Statement on Form S-8 filed on May 9, 2008 (SEC File No. 333-150783)).
10.15*** | TETRA Technologies, Inc. Cash Incentive Compensation Plan (incorporated by reference to Exhibit 4.1 to the Company’s Form 10-Q filed on May 10, 2010 (SEC File No. 001-13455)).
10.16*** | TETRA Technologies, Inc. 2007 Long Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on May 5, 2010 (SEC File No. 333-166537)).
10.17*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Consultant Nonqualified Stock Option Agreement, Non-Employee Consultant Restricted Stock Agreement, and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. 2007 Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.12, 4.13, 4.14, 4.15, 4.16 and 4.17 to the Company’s Registration Statement on Form S-8 filed on May 5, 2010 (SEC File No. 333-166537)).
10.18 | Agreement and Second Amendment to Credit Agreement dated as of October 29, 2010, among TETRA Technologies, Inc. and certain of its subsidiaries, as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association and Wells Fargo Bank, N.A. as syndication agents, and Comerica Bank, as documentation agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on November 3, 2010 (SEC File No. 001-13455)).
10.19 | Contribution, Conveyance and Assumption Agreement, dated June 20, 2011, by and among Compressco, Inc., Compressco Field Services, Inc., Compressco Canada, Inc., Compressco de Mexico, S. de R.L. de C.V., Compressco Partners GP Inc., Compressco Partners, L.P., Compressco Partners Operating, LLC, Compressco Netherlands B.V., Compressco Holdings, LLC, Compressco Netherlands Cooperatief U.A., Compressco Partners Sub, Inc., TETRA International Incorporated, Production Enhancement Mexico, S. de R.L. de C.V. and TETRA Technologies, Inc. (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 30, 2011 (SEC File No. 001-13455)).
10.20 | Omnibus Agreement dated June 20, 2011, by and among Compressco Partners, L.P., TETRA Technologies, Inc. and Compressco Partners GP Inc. (incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K filed on June 30, 2011 (SEC File No. 001-13455)).
10.21 | Purchase and Sale Agreement, dated April 1, 2011, by and between Maritech Resources, Inc. as Seller and Tana Exploration Company LLC as Buyer (incorporated by reference to Exhibit 10.3 to the Company’s Form 10-Q filed on August 9, 2011 (SEC File No. 001-13455)).
10.22*** | TETRA Technologies, Inc. 2011 Long-Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on May 10, 2011 (SEC File No. 333-174090)).

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10.23*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Consultant Nonqualified Stock Option Agreement, Non-Employee Consultant Restricted Stock Agreement and Non-Employee Director Restricted Stock Agreement under the TETRA Technologies, Inc. 2011 Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.12, 4.13, 4.14, 4.15, 4.16 and 4.17 to the Company’s Registration Statement on Form S-8 filed on May 10, 2011 (SEC File No. 333-174090)).
10.24*** | Employee Restricted Stock Agreement between TETRA Technologies, Inc. and Peter J. Pintar dated November 15, 2011 (incorporated by reference to Exhibit 4.11 to the Company’s Registration Statement on Form S-8 filed on November 15, 2011 (SEC File No. 333-177995)).
10.25*** | Separation and Release Agreement dated July 31, 2012 by and between TETRA Technologies, Inc. and Joseph M. Abell (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on August 1, 2012 (SEC File No. 001-13455)).
10.26*** | Employee Equity Award Agreement dated August 15, 2012 by and between TETRA Technologies, Inc. and Elijio V. Serrano (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on August 16, 2012 (SEC File No. 001-13455)).
10.27+ | Purchase and Sale Agreement dated December 31, 2012 by and between TETRA Technologies, Inc. and Tetris Property LP.
10.28+ | Lease Agreement dated December 31, 2012 by and between Tetris Property LP and TETRA Technologies, Inc.
10.29*** | TETRA Technologies, Inc. 2011 Amended and Restated Long Term Incentive Compensation Plan (incorporated by reference to Exhibit 4.9 to the Company’s Registration Statement on Form S-8 filed on May 9, 2013 (SEC File No. 333-188494)).
10.30*** | Forms of Employee Incentive Stock Option Agreement, Employee Nonqualified Stock Option Agreement, Employee Restricted Stock Agreement, Non-Employee Director Restricted Stock Agreement, Non-Employee Nonqualified Stock Option Agreement and Non-Employee Restricted Stock Agreement under the TETRA Technologies, Inc. 2011 Amended and Restated Long Term Incentive Compensation Plan (incorporated by reference to Exhibits 4.10, 4.11, 4.12, 4.13, 4.14 and 4.15, respectively to the Company’s Registration Statement on Form S-8 filed on May 9, 2013 (SEC File No. 333-188494)).
10.31*** | Form of Change in Control Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on June 4, 2013 (SEC File No. 001-13455)).
10.32 | Credit Agreement, dated October 15, 2013, by and among Compressco Partners, L.P., Compressco Partners Operating, LLC, Compressco Partners Sub, Inc., Compressco Holdings, LLC, Compressco Leasing, LLC, Compressco Field Services International, LLC, and Compressco International, LLC, as the borrowers, JP Morgan Chase Bank, N.A., as Administrative Agent, and JPMorgan Chase Bank, N.A., Bank of America, N.A., and PNC Bank, National Association, as lenders (incorporated by reference to Exhibit 10.1 to Compressco Partners, L.P.’s Current Report on Form 8-K filed on October 18, 2013 (SEC File No. 001-35195)).
10.33*** | Employee Restricted Stock Award Agreement dated June 16, 2014 by and between TETRA Technologies, Inc. and Joseph Elkhoury (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on June 16, 2014 (SEC File No. 001-13455)).
10.34 | First Amendment to Omnibus Agreement, dated June 20, 2014, by and among TETRA Technologies, Inc., Compressco Partners, L.P., and Compressco Partners GP Inc. (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on June 26, 2014 (SEC File No. 001-13455)).
10.35 | Stock Purchase Agreement, dated as of July 20, 2014, by and between Warren Equipment Company and Compressco Partners Sub, Inc. (incorporated by reference to Exhibit 2.1 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).
10.36 | Indenture, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and U.S. Bank National Association, as Trustee (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.37 | Registration Rights Agreement, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 4.2 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.38 | Guaranty, dated July 20, 2014, by Compressco Partners, L.P. in favor of Warren Equipment Company (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).
10.39 | Contribution and Unit Purchase Agreement, dated as of July 20, 2014, by and among Compressco Partners, L.P., Compresso Partners GP, Inc. and TETRA Technologies, Inc. (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on July 21, 2014 (SEC File No. 001-13455)).

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10.40 | Purchase Agreement, dated as of July 29, 2014, by and among Compressco Partners, L.P., Compressco Finance Inc., the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated as representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.41 | Purchase Agreement Joinder, dated as of August 4, 2014, by and among the Guarantors party thereto and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as Representative of the Initial Purchasers named therein (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.42 | Credit Agreement, dated as of August 4, 2014, by and among Compressco Partners, L.P., Compressco Partners Sub, Inc., the lenders from time to time party thereto, Bank of America, N.A., in its capacity as administrative agent for the lenders and collateral agent, and the other parties thereto (incorporated by reference to Exhibit 10.3 to the Company's Form 8-K filed on August 5, 2014 (SEC File No. 001-13455)).
10.43 | Agreement and Third Amendment to Credit Agreement dated as of September 30, 2014, among TETRA Technologies, Inc. and certain of its subsidiaries as borrowers, JPMorgan Chase Bank, N.A., as administrative agent, Bank of America, National Association, as syndication agent, Comerica Bank, as documentation agent, and the lender parties thereto (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on October 6, 2014 (SEC File No. 001-13455)).
10.44*** | Separation and Release Agreement with Edwin H. Goldman dated January 26, 2015 (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on January 30, 2015 (SEC File No. 001-13455)).
10.45 | Note Purchase Agreement, dated March 18, 2015, by and among TETRA Technologies, Inc., Wells Fargo Energy Capital, Inc., as Noteholder Representative, and Wells Fargo Energy Capital, Inc. as the sole Initial Purchaser listed on Schedule A thereto (incorporated by reference to Exhibit 4.1 to the Company's Form 8-K filed on March 24, 2015 (SEC File No. 001-13455)).
10.46 | Pledge and Security Agreement, dated as of April 30, 2015, by and among TETRA Technologies, Inc., Compressco Field Services, L.L.C., Epic Diving & Marine Services, LLC, TETRA International Incorporated, TETRA Production Testing Services, LLC, CSI Compressco GP Inc., TETRA Applied Technologies, LLC and CSI Compressco Investment LLC, as the grantors, and Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative and collateral agent (incorporated by reference to Exhibit 10.1 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
10.47 | Registration Rights Agreement, dated as of April 30, 2015, by and among CSI Compressco LP, TETRA Technologies, Inc., and Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative (incorporated by reference to Exhibit 10.2 to the Company's Form 8-K filed on May 6, 2015 (SEC File No. 001-13455)).
10.48*** | TETRA Technologies, Inc. Amended and Restated 2007 Long Term Incentive Compensation Plan, as amended through February 20, 2015 (incorporated by reference to Exhibit 10.3 to the Company's Form 10-Q filed on August 10, 2015 (SEC File No. 001-13455)).
10.49*** | TETRA Technologies, Inc. Second Amended and Restated 2011 Long Term Incentive Compensation Plan, as amended through February 20, 2015 (incorporated by reference to Exhibit 10.4 to the Company's Form 10-Q filed on August 10, 2015 (SEC File No. 001-13455)).
21+ | Subsidiaries of the Company.
23.1+ | Consent of Ernst & Young, LLP.
31.1+ | Certification Pursuant to Rule 13(a)-14(a) or 15(d)-14(a) of the Exchange Act, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2+ | Certification Pursuant to Rule 13(a)-14(a) or 15(d)-14(a) of the Exchange Act, As Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1** | Certification Furnished Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chief Executive Officer).
32.2** | Certification Furnished Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chief Financial Officer).
101.INS++ | XBRL Instance Document.
101.SCH++ | XBRL Taxonomy Extension Schema Document.
101.CAL++ | XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB++ | XBRL Taxonomy Extension Label Linkbase Document.
101.PRE++ | XBRL Taxonomy Extension Presentation Linkbase Document.
101.DEF++ | XBRL Taxonomy Extension Definition Linkbase Document.

+ | Filed with this report

** | Furnished with this report.

76

*** | Management contract or compensatory plan or arrangement.

++ | Attached as Exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language): (i) Consolidated Statements of Operations for the years ended December 31, 2015, 2014 and 2013; (ii) Consolidated Balance Sheets as of December 31, 2015 and December 31, 2014; (iii) Consolidated Statements of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013; (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013; (v) Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2015, 2014 and 2013; and (vi) Notes to Consolidated Financial Statements for the year ended December 31, 2015.

77

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Board of Directors and Stockholders of
TETRA Technologies, Inc. and Subsidiaries
We have audited the accompanying consolidated balance sheets of TETRA Technologies, Inc. and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of operations, comprehensive income (loss), equity, and cash flows for each of the three years in the period ended December 31, 2015. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.
In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of TETRA Technologies, Inc. and subsidiaries at December 31, 2015 and 2014, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2015, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), TETRA Technologies, Inc. and subsidiaries' internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 4, 2016 expressed an unqualified opinion thereon.
/s/ERNST & YOUNG LLP
Houston, Texas
March 4, 2016
F-1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Board of Directors and Stockholders of
TETRA Technologies, Inc. and Subsidiaries
We have audited TETRA Technologies, Inc. and subsidiaries’ internal control over financial reporting as of December 31, 2015 based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). TETRA Technologies, Inc. and subsidiaries’ management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
In our opinion, TETRA Technologies, Inc. and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of TETRA Technologies, Inc. and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of operations, comprehensive income (loss), equity, and cash flows for each of the three years in the period ended December 31, 2015 and our report dated March 4, 2016 expressed an unqualified opinion thereon.
/s/ERNST & YOUNG LLP
Houston, Texas
March 4, 2016
F-2

TETRA Technologies, Inc. and Subsidiaries
Consolidated Balance Sheets
(In Thousands)

|  | December 31, 2015 |  | December 31, 2014
ASSETS |  |  |  |  |  |
Current assets: |  |  |  |  |  |
Cash and cash equivalents |  | $ | 23,057 |  |  | $ | 48,384 |
Restricted cash |  | 6,721 |  |  | 8,721 |
Trade accounts receivable, net of allowances for doubtful accounts of $7,847 in 2015 and $2,485 in 2014 |  | 184,172 |  |  | 226,966 |
Inventories |  | 117,009 |  |  | 189,357 |
Assets held for sale |  | 772 |  |  | 2,568 |
Prepaid expenses and other current assets |  | 23,673 |  |  | 24,463 |
Total current assets |  | 355,404 |  |  | 500,459 |
Property, plant, and equipment: |  |  |  |  |  |
Land and building |  | 79,462 |  |  | 75,200 |
Machinery and equipment |  | 1,345,969 |  |  | 1,292,734 |
Automobiles and trucks |  | 43,536 |  |  | 57,035 |
Chemical plants |  | 181,014 |  |  | 174,108 |
Construction in progress |  | 6,505 |  |  | 21,483 |
Total property, plant, and equipment |  | 1,656,486 |  |  | 1,620,560 |
Less accumulated depreciation |  | (608,482 | ) |  | (496,368 | )
Net property, plant, and equipment |  | 1,048,004 |  |  | 1,124,192 |
Other assets: |  |  |  |  |  |
Goodwill |  | 112,945 |  |  | 293,866 |
Patents, trademarks and other intangible assets, net of accumulated amortization of $44,695 in 2015 and $39,754 in 2014 |  | 86,375 |  |  | 107,167 |
Deferred tax assets |  | 25 |  |  | 2,183 |
Other assets |  | 53,623 |  |  | 54,521 |
Total other assets |  | 252,968 |  |  | 457,737 |
Total assets |  | $ | 1,656,376 |  |  | $ | 2,082,388 |

See Notes to Consolidated Financial Statements
F-3

TETRA Technologies, Inc. and Subsidiaries
Consolidated Balance Sheets
(In Thousands, Except Share Amounts)

|  | December 31, 2015 |  | December 31, 2014
LIABILITIES AND EQUITY |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |
Trade accounts payable |  | $ | 62,114 |  |  | $ | 119,240 |
Unearned Income |  | 27,542 |  |  | 70,688 |
Accrued liabilities |  | 80,970 |  |  | 85,700 |
Current portion of long-term debt |  | 50 |  |  | 90,074 |
Decommissioning and other asset retirement obligations, net |  | 14,570 |  |  | 12,758 |
Total current liabilities |  | 185,246 |  |  | 378,460 |
Long-term debt, net |  | 873,402 |  |  | 844,961 |
Deferred income taxes |  | 9,467 |  |  | 11,706 |
Decommissioning and other asset retirement obligations, net |  | 42,879 |  |  | 49,983 |
Other liabilities |  | 31,202 |  |  | 31,677 |
Total long-term liabilities |  | 956,950 |  |  | 938,327 |
Commitments and contingencies |  |  |  |  |  |
Equity: |  |  |  |  |  |
TETRA Stockholders' equity: |  |  |  |  |  |
Common stock, par value $0.01 per share; 100,000,000 shares authorized; 83,023,628 shares issued at December 31, 2015, and 82,322,876 shares issued at December 31, 2014 |  | 830 |  |  | 823 |
Additional paid-in capital |  | 256,184 |  |  | 241,166 |
Treasury stock, at cost; 2,766,958 shares held at December 31, 2015, and 2,672,930 shares held at December 31, 2014 |  | (16,837 | ) |  | (16,419 | )
Accumulated other comprehensive income (loss) |  | (43,135 | ) |  | (26,215 | )
Retained earnings |  | 44,175 |  |  | 170,358 |
Total TETRA stockholders' equity |  | 241,217 |  |  | 369,713 |
Noncontrolling interests |  | 272,963 |  |  | 395,888 |
Total equity |  | 514,180 |  |  | 765,601 |
Total liabilities and equity |  | $ | 1,656,376 |  |  | $ | 2,082,388 |

See Notes to Consolidated Financial Statements
F-4

TETRA Technologies, Inc. and Subsidiaries
Consolidated Statements of Operations
(In Thousands, Except Per Share Amounts)

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Revenues: |  |  |  |  |  |  |  |  |
Product sales |  | $ | 457,761 |  |  | $ | 374,978 |  |  | $ | 300,145 |
Services and rentals |  | 672,384 |  |  | 702,589 |  |  | 609,253 |
Total revenues |  | 1,130,145 |  |  | 1,077,567 |  |  | 909,398 |
Cost of revenues: |  |  |  |  |  |  |  |  |
Cost of product sales |  | 324,187 |  |  | 363,861 |  |  | 282,704 |
Cost of services and rentals |  | 417,549 |  |  | 466,908 |  |  | 400,739 |
Depreciation, amortization, and accretion |  | 155,015 |  |  | 116,912 |  |  | 80,985 |
Impairments of long-lived assets |  | 44,158 |  |  | 34,842 |  |  | 9,578 |
Total cost of revenues |  | 940,909 |  |  | 982,523 |  |  | 774,006 |
Gross profit |  | 189,236 |  |  | 95,044 |  |  | 135,392 |
General and administrative expense |  | 157,812 |  |  | 142,689 |  |  | 131,466 |
Goodwill impairment |  | 177,006 |  |  | 64,295 |  |  | — |
Interest expense, net |  | 50,514 |  |  | 31,998 |  |  | 17,121 |
(Gain) loss on sales of assets |  | (4,375 | ) |  | (11 | ) |  | (5,776 | )
Other (income) expense, net |  | 10,042 |  |  | 13,944 |  |  | (7,291 | )
Income (loss) before taxes |  | (201,763 | ) |  | (157,871 | ) |  | (128 | )
Provision (benefit) for income taxes |  | 7,704 |  |  | 9,704 |  |  | (3,454 | )
Income (loss) before discontinued operations |  | (209,467 | ) |  | (167,575 | ) |  | 3,326 |
Discontinued operations: |  |  |  |  |  |  |  |
Loss from discontinued operations, net of taxes |  | — |  |  | — |  |  | (1 | )
Net income (loss) |  | (209,467 | ) |  | (167,575 | ) |  | 3,325 |
Less: (income) loss attributable to noncontrolling interest |  | 83,284 |  |  | (2,103 | ) |  | (3,172 | )
Net income (loss) attributable to TETRA stockholders |  | $ | (126,183 | ) |  | $ | (169,678 | ) |  | $ | 153 |
Basic net income (loss) per common share: |  |  |  |  |  |  |  |  |
Net income (loss) attributable to TETRA stockholders |  | $ | (1.59 | ) |  | $ | (2.16 | ) |  | $ | — |
Average shares outstanding |  | 79,169 |  |  | 78,600 |  |  | 77,954 |
Diluted net income (loss) per common share: |  |  |  |  |  |  |  |  |
Net income (loss) attributable to TETRA stockholders |  | $ | (1.59 | ) |  | $ | (2.16 | ) |  | $ | — |
Average diluted shares outstanding |  | 79,169 |  |  | 78,600 |  |  | 78,840 |

See Notes to Consolidated Financial Statements
F-5

TETRA Technologies, Inc. and Subsidiaries
Consolidated Statements of Comprehensive Income (Loss)
(In Thousands)

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Net income (loss) |  | (209,467 | ) |  | $ | (167,575 | ) |  | $ | 3,325 |
Foreign currency translation loss, net of taxes of $0 in 2015, $3,368 in 2014, and $(1,076) in 2013 |  | (16,920 | ) |  | (22,312 | ) |  | (2,409 | )
Comprehensive income (loss) |  | (226,387 | ) |  | (189,887 | ) |  | 916 |
Less: comprehensive (income) loss attributable to noncontrolling interest |  | 87,155 |  |  | (2,103 | ) |  | (3,172 | )
Comprehensive income (loss) attributable to TETRA stockholders |  | $ | (139,232 | ) |  | $ | (191,990 | ) |  | $ | (2,256 | )

See Notes to Consolidated Financial Statements
F-6

TETRA Technologies, Inc. and Subsidiaries
Consolidated Statements of Equity
(In Thousands)

| Common Stock Par Value |  | Additional Paid-In Capital |  |  |  | Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
|  |  | Treasury Stock |  | Currency Translation |  | Retained Earnings |  | Noncontrolling Interest |  | Total Equity
Balance at December 31, 2012 | $ | 804 |  |  | $ | 226,954 |  |  | (15,027 | ) |  | $ | (1,494 | ) |  | 339,883 |  |  | $ | 42,188 |  |  | 593,308 |
Net income for 2013 |  |  |  |  |  |  |  |  |  |  |  |  | 153 |  |  | 3,172 |  |  | 3,325 |
Translation adjustment, net of taxes of $(1,076) |  |  |  |  |  |  |  |  |  | (2,409 | ) |  |  |  |  |  |  |  | (2,409 | )
Comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 916 |
Distributions to public unitholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,846 | ) |  | (4,846 | )
Exercise of common stock options | 9 |  |  | 2,245 |  |  | (276 | ) |  |  |  |  |  |  |  |  |  |  | 1,978 |
Treasury stock activity, net |  |  |  |  |  |  | (462 | ) |  |  |  |  |  |  |  |  |  |  | (462 | )
Equity compensation expense |  |  |  | 5,265 |  |  |  |  |  |  |  |  |  |  |  | 1,459 |  |  | 6,724 |
Other noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (16 | ) |  | (16 | )
Tax adjustment related to equity-based compensation, net |  |  |  | (104 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  | (104 | )
Balance at December 31, 2013 | $ | 813 |  |  | $ | 234,360 |  |  | $ | (15,765 | ) |  | $ | (3,903 | ) |  | $ | 340,036 |  |  | $ | 41,957 |  |  | $ | 597,498 |
Net loss for 2014 |  |  |  |  |  |  |  |  |  |  |  |  | (169,678 | ) |  | 2,103 |  |  | (167,575 | )
Translation adjustment, net of taxes of $3,368 |  |  |  |  |  |  |  |  |  | (22,312 | ) |  |  |  |  |  |  |  | (22,312 | )
Comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |  | (189,887 | )
Distributions to public unitholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (12,569 | ) |  | (12,569 | )
Exercise of common stock options | 10 |  |  | 1,678 |  |  | (78 | ) |  |  |  |  |  |  |  |  |  |  | 1,610 |
Treasury stock activity, net |  |  |  |  |  |  | (576 | ) |  |  |  |  |  |  |  |  |  |  | (576 | )
Proceeds from issuance of CCLP common units, net of underwriters' discount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 363,149 |  |  | 363,149 |
Equity compensation expense |  |  |  | 5,231 |  |  |  |  |  |  |  |  |  |  |  | 1,544 |  |  | 6,775 |
Other noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (296 | ) |  | (296 | )
Tax adjustment related to equity-based compensation, net |  |  |  | (103 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  | (103 | )
Balance at December 31, 2014 | $ | 823 |  |  | $ | 241,166 |  |  | $ | (16,419 | ) |  | $ | (26,215 | ) |  | $ | 170,358 |  |  | $ | 395,888 |  |  | $ | 765,601 |
Net loss for 2015 |  |  |  |  |  |  |  |  |  |  |  |  | (126,183 | ) |  | (83,284 | ) |  | (209,467 | )
Translation adjustment, net of taxes of $0 |  |  |  |  |  |  |  |  |  | (16,920 | ) |  |  |  |  | (3,871 | ) |  | (20,791 | )
Comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |  | (230,258 | )
Distributions to public unitholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (37,816 | ) |  | (37,816 | )
Exercise of common stock options | 7 |  |  | 295 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 302 |
Treasury stock activity, net |  |  |  |  |  |  | (418 | ) |  |  |  |  |  |  |  |  |  |  | (418 | )
Equity compensation expense |  |  |  | 14,723 |  |  |  |  |  |  |  |  |  |  |  | 2,164 |  |  | 16,887 |
Other noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (118 | ) |  | (118 | )
Balance at December 31, 2015 | $ | 830 |  |  | $ | 256,184 |  |  | $ | (16,837 | ) |  | $ | (43,135 | ) |  | $ | 44,175 |  |  | $ | 272,963 |  |  | $ | 514,180 |

See Notes to Consolidated Financial Statements
F-7

TETRA Technologies, Inc. and Subsidiaries
Consolidated Statements of Cash Flows
(In Thousands)

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Operating activities: |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (209,467 | ) |  | $ | (167,575 | ) |  | $ | 3,325 |
Reconciliation of net income (loss) to cash provided by operating activities: |  |  |  |  |  |  |  |  |
Depreciation, amortization, and accretion |  | 155,015 |  |  | 116,912 |  |  | 80,985 |
Impairments of long-lived assets |  | 44,158 |  |  | 34,842 |  |  | 9,578 |
Impairment of goodwill |  | 177,006 |  |  | 64,295 |  |  | — |
Provision (benefit) for deferred income taxes |  | (379 | ) |  | (350 | ) |  | (9,824 | )
Equity-based compensation expense |  | 16,887 |  |  | 6,775 |  |  | 6,724 |
Provision for doubtful accounts |  | 5,387 |  |  | 856 |  |  | 374 |
Excess decommissioning/abandoning costs |  | 2,661 |  |  | 72,724 |  |  | 75,312 |
Other non-cash charges and credits |  | 4,271 |  |  | (3,782 | ) |  | (11,026 | )
Amortization of deferred financing costs |  | 3,961 |  |  | 2,968 |  |  | 861 |
Acquisition and transaction financing fees |  | — |  |  | 9,869 |  |  | — |
(Gain) loss on sale of property, plant, and equipment |  | (4,375 | ) |  | (11 | ) |  | (5,776 | )
Changes in operating assets and liabilities, net of assets acquired: |  |  |  |  |  |  |  |  |
Accounts receivable |  | 38,025 |  |  | (7,866 | ) |  | 14,139 |
Inventories |  | 70,431 |  |  | (21,528 | ) |  | 3,011 |
Prepaid expenses and other current assets |  | (1,806 | ) |  | (197 | ) |  | 12,281 |
Trade accounts payable and accrued expenses |  | (98,407 | ) |  | 67,508 |  |  | (16,192 | )
Decommissioning liabilities |  | (10,305 | ) |  | (63,319 | ) |  | (114,109 | )
Other |  | 2,888 |  |  | (3,476 | ) |  | (7 | )
Net cash provided by operating activities |  | 195,951 |  |  | 108,645 |  |  | 49,656 |
Investing activities: |  |  |  |  |  |  |  |  |
Purchases of property, plant, and equipment |  | (120,597 | ) |  | (131,609 | ) |  | (101,379 | )
Acquisition of businesses, net of cash acquired |  | — |  |  | (854,031 | ) |  | — |
Proceeds from sale of property, plant, and equipment |  | 7,135 |  |  | 17,527 |  |  | 1,794 |
Other investing activities |  | (1,525 | ) |  | 374 |  |  | (440 | )
Net cash used in investing activities |  | (114,987 | ) |  | (967,739 | ) |  | (100,025 | )
Financing activities: |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  | 535,896 |  |  | 837,519 |  |  | 140,971 |
Principal payments on long-term debt |  | (598,070 | ) |  | (289,900 | ) |  | (120,664 | )
Proceeds from issuance of CCLP common units, net of underwriters' discount |  | — |  |  | 363,149 |  |  | — |
CCLP distributions |  | (37,816 | ) |  | (12,569 | ) |  | (4,846 | )
Proceeds from sale of common stock and exercise of stock options |  | 303 |  |  | 1,032 |  |  | 2,251 |
Financing costs and other financing activities |  | (3,750 | ) |  | (27,587 | ) |  | (1,978 | )
Net cash provided by (used in) financing activities |  | (103,437 | ) |  | 871,644 |  |  | 15,734 |
Effect of exchange rate changes on cash |  | (2,854 | ) |  | (2,920 | ) |  | (659 | )
Increase (decrease) in cash and cash equivalents |  | (25,327 | ) |  | 9,630 |  |  | (35,294 | )
Cash and cash equivalents at beginning of period |  | 48,384 |  |  | 38,754 |  |  | 74,048 |
Cash and cash equivalents at end of period |  | $ | 23,057 |  |  | $ | 48,384 |  |  | $ | 38,754 |
Supplemental cash flow information: |  |  |  |  |  |  |  |  |
Interest paid |  | $ | 52,491 |  |  | $ | 33,092 |  |  | $ | 17,728 |
Taxes paid |  | 6,710 |  |  | 8,729 |  |  | 7,438 |

See Notes to Consolidated Financial Statements
F-8

TETRA Technologies, Inc. and Subsidiaries
Notes to Consolidated Financial Statements
December 31, 2015
NOTE A – ORGANIZATION AND OPERATIONS
We are a geographically diversified oil and gas services company, focused on completion fluids and associated products and services, water management, frac flowback, production well testing, offshore rig cooling, compression services and equipment, and selected offshore services including well plugging and abandonment, decommissioning, and diving. We also have a limited domestic oil and gas production business. We were incorporated in Delaware in 1981 and are composed of five reporting segments organized into four divisions – Fluids, Production Testing, Compression, and Offshore. Unless the context requires otherwise, when we refer to “we,” “us,” and “our,” we are describing TETRA Technologies, Inc. and its consolidated subsidiaries on a consolidated basis.
Our Fluids Division manufactures and markets clear brine fluids, additives, and associated products and services to the oil and gas industry for use in well drilling, completion, and workover operations in the United States and in certain countries in Latin America, Europe, Asia, the Middle East, and Africa. The Division also markets liquid and dry calcium chloride products manufactured at its production facilities or purchased from third-party suppliers to a variety of markets outside the energy industry. The Fluids Division also provides domestic onshore oil and gas operators with comprehensive water management services.
Our Production Testing Division provides frac flowback, production well testing, offshore rig cooling, and other associated services in many of the major oil and gas producing regions in the United States, Mexico, and Canada, as well as in basins in certain regions in South America, Africa, Europe, the Middle East, and Australia.
Our Compression Division is a provider of compression services and equipment for natural gas and oil production, gathering, transportation, processing, and storage. The Compression Division's equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield pump systems designed and fabricated at the Division's facilities as well as the sale of compressor package parts and components manufactured by third-party suppliers. The Compression Division's aftermarket services business provides compressor package reconfiguration and maintenance services. The Compression Division provides its services and equipment to a broad base of natural gas and oil exploration and production, midstream, transmission, and storage companies operating throughout many of the onshore producing regions of the United States as well as in a number of foreign countries, including Mexico, Canada, and Argentina. As a result of the August 4, 2014, acquisition of Compressor Systems, Inc. ("CSI") (the "CSI Acquisition"), the scope of our Compression Division was significantly expanded. For further discussion, see Note C - Acquisitions and Dispositions.
Our Offshore Division consists of two operating segments: Offshore Services and Maritech. The Offshore Services segment provides: (1) downhole and subsea services such as well plugging and abandonment and workover services; (2) decommissioning and certain construction services utilizing heavy lift barges and various cutting technologies with regard to offshore oil and gas production platforms and pipelines; and (3) conventional and saturation diving services.
The Maritech segment is a limited oil and gas production operation. During 2011 and the first quarter of 2012, Maritech sold substantially all of its oil and gas producing property interests. Maritech’s operations consist primarily of the ongoing abandonment and decommissioning associated with its remaining offshore wells and production platforms. Maritech intends to acquire a portion of these services from the Offshore Division’s Offshore Services segment.
Throughout 2015 and continuing into early 2016, significant decreases in oil and natural gas commodity prices lowered the capital expenditure and operating plans of many of our customers, creating uncertainty regarding the expected demand for many of our products and services and the resulting cash flows from operating activities for the foreseeable future. In addition, the availability of new borrowings in current capital markets is more limited and costly. Accordingly, we continue to implement cost reduction measures designed to lower our cost structure and have taken other steps to improve our operating cash flows. As a result of the steps taken to improve operating
F-9

cash flows, we believe that despite the current industry environment and activity levels we will have adequate liquidity to fund our operations and debt obligations and maintain compliance with debt covenants through December 31, 2016. In addition, as further discussed in Note G - Long-Term Debt and Other Borrowings, on November 20, 2015, pursuant to a Note Purchase Agreement (the “2015 Senior Note Purchase Agreement”) with GSO Tetra Holdings LP, an unrelated third party, we issued and sold $125.0 million in aggregate principal amount of our 11% Senior Notes due November 5, 2022 (the “Series 2015 Senior Notes”). Immediately after the closing and funding, we applied a portion of the $119.7 million net proceeds from the sale of the Series 2015 Senior Notes (consisting of $125.0 million aggregate principal amount net of a $5.0 million discount and certain financing costs) to repay all of the indebtedness for borrowed money outstanding under our bank credit facility (the "Credit Agreement"). In December 2015, we applied the remaining portion of the proceeds, together with other funds to (i) pay the $25.0 million purchase price pursuant to a tender offer which commenced on November 5, 2015, (the “Tender Offer”) to purchase for cash up to $25.0 million aggregate principal amount of certain of our outstanding Series 2010-A Senior Notes and Series 2010-B Senior Notes (collectively, the “2010 Senior Notes”), (ii) prepay in full all amounts owed in respect of our outstanding Series 2006-A Senior Notes, due April 30, 2016, and (iii) pay fees and expenses associated with the transactions contemplated under the 2015 Senior Note Purchase Agreement. In addition, we entered into an agreement with Wells Fargo Energy Capital, Inc. that extends the maturity date of the $50.0 million of the Senior Secured Notes due April 1, 2017, (the "Senior Secured Notes") from 2017 to 2019. As a result of these transactions, we have repaid or extended the maturity dates of a significant portion of TETRA's total long-term debt without significantly increasing the amount of TETRA's net borrowings.
NOTE B – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Principles of Consolidation
Our consolidated financial statements include the accounts of our wholly owned subsidiaries. We consolidate the financial statements of CSI Compressco LP ("CCLP") and its subsidiaries as part of our Compression Division. We control CCLP through our ownership of its general partner. The share of CCLP net assets and earnings that is not owned by us is presented as noncontrolling interest in our consolidated financial statements. Our cash flows from our investment in CCLP are limited to the quarterly distributions we receive or the amounts collected for services performed on behalf of CCLP, as TETRA's capital structure and CCLP's capital structure are separate, as we have no cross default provisions, cross collateralization provisions, or cross guarantees with CCLP's debt, nor does CCLP with TETRA's debt. As of December 31, 2015, our consolidated balance sheet includes $332.2 million of restricted net assets, consisting of the consolidated net assets of CCLP. As our net investment in CCLP's assets exceeds 25.0% of our consolidated net assets, we have provided condensed parent company financial information in a supplemental schedule accompanying these consolidated financial statements. Our interests in oil and gas properties are proportionately consolidated. All intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates
The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclose contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues, expenses, and impairments during the reporting period. Actual results could differ from those estimates, and such differences could be material.
Reclassifications and Adjustments
Certain previously reported financial information has been reclassified to conform to the current year's presentation. The impact of such reclassifications was not significant to the prior year's overall presentation.
During the fourth quarter of 2015, we recorded a correcting adjustment to equity-based compensation expense of approximately $6.7 million. The impact of this adjustment was not significant to the current, or any prior, financial reporting period.
Cash Equivalents
We consider all highly liquid cash investments with a maturity of three months or less when purchased to be cash equivalents.
F-10

Restricted Cash
Restricted cash is classified as a current asset when it is expected to be repaid or settled in the next twelve month period. Restricted cash reported on our balance sheet as of December 31, 2015, consists primarily of escrowed cash associated with our July 2011 purchase of a heavy lift derrick barge. The escrowed cash is expected to be released to the sellers in 2016.
Financial Instruments
Financial instruments that subject us to concentrations of credit risk consist principally of trade receivables with companies in the energy industry. Our policy is to evaluate, prior to providing goods or services, each customer's financial condition and to determine the amount of open credit to be extended. We generally require appropriate, additional collateral as security for credit amounts in excess of approved limits. Our customers consist primarily of major, well-established oil and gas producers and independent oil and gas companies. Payment terms are on a short-term basis. The risk of loss from the inability to collect trade receivables, including certain long-term contractual receivables of our Maritech segment, is heightened during prolonged periods of low oil and natural gas commodity prices.
We have currency exchange rate risk exposure related to transactions denominated in a foreign currency as well as to investments in certain of our international operations. Our risk management activities include the use of foreign currency forward purchase and sale derivative contracts as part of a program designed to mitigate the currency exchange rate risk exposure on selected international operations.
As a result of the outstanding balances under our variable rate revolving credit facilities, we face market risk exposure related to changes in applicable interest rates. Although we have no interest rate swap contracts outstanding to hedge this potential risk exposure, we have entered into certain fixed interest rate notes, which are scheduled to mature at various dates from 2017 through 2022 and which mitigate this risk on our total outstanding borrowings.
Allowances for Doubtful Accounts
Allowances for doubtful accounts are determined generally and on a specific identification basis when we believe that the collection of specific amounts owed to us is not probable. The changes in allowances for doubtful accounts for the three year period ended December 31, 2015, are as follows:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
At beginning of period |  | $ | 2,485 |  |  | $ | 1,349 |  |  | $ | 1,085 |
Activity in the period: |  |  |  |  |  |  |  |  |
Provision for doubtful accounts |  | 5,387 |  |  | 856 |  |  | 374 |
Account (chargeoffs) recoveries |  | (25 | ) |  | 280 |  |  | (110 | )
At end of period |  | $ | 7,847 |  |  | $ | 2,485 |  |  | $ | 1,349 |

F-11

Inventories
Inventories are stated at the lower of cost or market value. Cost is determined using the weighted average method. Components of inventories as of December 31, 2015, and December 31, 2014, are as follows:

|  | December 31,
|  | 2015 |  | 2014
|  | (In Thousands)
Finished goods |  | $ | 54,587 |  |  | $ | 62,188 |
Raw materials |  | 1,731 |  |  | 5,005 |
Parts and supplies |  | 37,379 |  |  | 51,229 |
Work in progress |  | 23,312 |  |  | 70,935 |
Total inventories |  | $ | 117,009 |  |  | $ | 189,357 |

Finished goods inventories includes newly manufactured clear brine fluids as well as recycled brines that are repurchased from certain customers. Recycled brines are recorded at cost, using the weighted average method. Work in progress inventories consist primarily of new compressor packages located in the CCLP fabrication facility in Midland, Texas. The cost of work in process is determined using the specific identification method. We write down the value of inventory by an amount equal to the difference between the cost of the inventory and its estimated realizable value.
Assets Held for Sale
Assets are classified as held for sale when, among other factors, they are identified and marketed for sale in their present condition, management is committed to their disposal, and the sale of the asset is probable within one year. Assets Held for Sale as of December 31, 2015, consists of certain compressor equipment assets to be sold during 2016. Assets Held for Sale as of December 31, 2014, consists of certain equipment assets that were sold during the first quarter of 2015.
Property, Plant, and Equipment
Property, plant, and equipment are stated at cost. Expenditures that increase the useful lives of assets are capitalized. The cost of repairs and maintenance is charged to operations as incurred. For financial reporting purposes, we provide for depreciation using the straight-line method over the estimated useful lives of assets, which are generally as follows:

Buildings |  | 15 – 40 years
Barges and vessels |  | 5 – 30 years
Machinery and equipment |  | 2 – 20 years
Automobiles and trucks |  | 3 – 4 years
Chemical plants |  | 15 – 30 years
Compressors |  | 12 – 20 years

Leasehold improvements are depreciated over the shorter of the remaining term of the associated lease or its useful life. Depreciation expense, excluding long-lived asset impairments for the years ended December 31, 2015, 2014, and 2013 was $138.2 million, $109.2 million, and $76.9 million, respectively.
Interest capitalized for the years ended December 31, 2015, 2014, and 2013 was $0.4 million, $0.8 million, and $1.6 million, respectively.
Intangible Assets other than Goodwill
Patents, trademarks, and other intangible assets are recorded on the basis of cost and are amortized on a straight-line basis over their estimated useful lives, ranging from 2 to 20 years. During 2014, as part of three acquisitions consummated during the year, we acquired intangible assets having a fair value of approximately $92.6 million with estimated useful lives ranging from 2 to 20 years (having a weighted average useful life of 12.5 years).
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Amortization expense of patents, trademarks, and other intangible assets was $14.8 million, $9.3 million, and $5.0 million for the years ended December 31, 2015, 2014, and 2013, respectively, and is included in depreciation, amortization and accretion. The estimated future annual amortization expense of patents, trademarks, and other intangible assets is $8.7 million for 2016, $8.4 million for 2017, $8.2 million for 2018, $8.1 million for 2019, and $8.0 million for 2020.
Intangible assets are tested for recoverability whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. In such an event, we will determine the fair value of the asset using an undiscounted cash flow analysis of the asset at the lowest level for which identifiable cash flows exist. If an impairment has occurred, we will recognize a loss for the difference between the carrying value and the estimated fair value of the intangible asset. During 2014 and 2015, certain intangible assets were impaired. See "Impairments of Long-Lived Assets" section below.
Goodwill
Goodwill represents the excess of cost over the fair value of the net assets of businesses acquired in purchase transactions. We perform a goodwill impairment test on an annual basis or whenever indicators of impairment are present. We perform the annual test of goodwill impairment following the fourth quarter of each year. The annual assessment for goodwill impairment begins with a qualitative assessment of whether it is “more likely than not” that the fair value of each reporting unit is less than its carrying value. This qualitative assessment requires the evaluation, based on the weight of evidence, of the significance of all identified events and circumstances for each reporting unit. Based on this qualitative assessment, we determined that, due to the significant decrease in oil and natural gas commodity prices and the resulting expected negative impact on demand for the products and services for each of our reporting units, it was “more likely than not” that the fair value of certain of our reporting units were less than their carrying values as of December 31, 2015.
When the qualitative analysis indicates that it is “more likely than not” that a reporting unit’s fair value is less than its carrying value, the resulting goodwill impairment test consists of a two-step accounting test performed on a reporting unit basis. The first step of the impairment test is to compare the estimated fair value with the recorded net book value (including goodwill) of our business. If the estimated fair value of the reporting unit is higher than the recorded net book value, no impairment is deemed to exist and no further testing is required. If, however, the estimated fair value of the reporting unit is below the recorded net book value, then a second step must be performed to determine the goodwill impairment required, if any. In this second step, the estimated fair value from the first step is used as the purchase price in a hypothetical acquisition of the reporting unit. Business combination accounting rules are followed to determine a hypothetical purchase price allocation to the reporting unit’s assets and liabilities. The residual amount of goodwill that results from this hypothetical purchase price allocation is compared to the recorded amount of goodwill for the reporting unit, and the recorded amount is written down to the hypothetical amount, if lower. The application of this second step under goodwill impairment testing may also result in impairments of other long-lived assets, including identified intangible assets. See Impairment of Long-Lived Assets section below for a discussion of other asset impairments that were identified as part of the testing of goodwill as of December 31, 2014, and December 31, 2015.
Because quoted market prices for our reporting units other than Compression are not available, our management must apply judgment in determining the estimated fair value of these reporting units for purposes of performing the goodwill impairment test. Management uses all available information to make these fair value determinations, including the present value of expected future cash flows using discount rates commensurate with the risks involved in the assets. The resultant fair values calculated for the reporting units are then compared to observable metrics for other companies in our industry or on mergers and acquisitions in our industry to determine whether those valuations, in our judgment, appear reasonable.
During the last half of 2014 and continuing throughout 2015, global oil and natural gas commodity prices, particularly crude oil, decreased significantly. This decrease in commodity prices has had, and is expected to continue to have, a negative impact on industry drilling and capital expenditure activity, which affects the demand for products and services of each of our reporting units. The accompanying decrease in our stock price during the last half of 2014 resulted in an overall reduction in our market capitalization as of December 31, 2014. As of December 31, 2015, our market capitalization was above the recorded net book value of our balance sheet, including all goodwill, however, due to decrease in the price per common unit of CCLP during 2015, CCLP's market capitalization as of December 31, 2015, was below the recorded net book value of its balance sheet, including all goodwill. The accounting principles regarding goodwill acknowledge that the observed market prices of individual
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trades of a company’s stock (and thus its computed market capitalization) may not be representative of the fair value of the company as a whole. Substantial value may arise from the ability to take advantage of synergies and other benefits that flow from control over another entity. Consequently, measuring the fair value of a collection of assets and liabilities that operate together in a controlled entity is different from measuring the fair value of a single share of that entity’s common stock. Therefore, once the fair value of the reporting units was determined, we also added a control premium to the calculations. This control premium is judgmental and is based on observed mergers and acquisitions in our industry.
As part of our internal annual business outlook for each of our reporting units that we perform during the fourth quarter of 2014 and 2015, we considered changes in the global economic environment which affected our stock price and market capitalization. As part of the first step of goodwill impairment testing, we updated our assessment of the future cash flows for each of our reporting units, applying expected long-term growth rates, discount rates, and terminal values that we consider reasonable for each reporting unit. Our Maritech reporting unit is excluded because it does not contain goodwill. We have calculated a present value of the respective cash flows for each of the other reporting units to arrive at an estimate of fair value under the income approach, and then used the market approach to corroborate these values.
Goodwill Impairment as of December 31, 2015. Throughout 2015 and particularly during the last half of the year, lower oil and natural gas commodity prices have resulted in a decreased demand for many of the products and services of each of our reporting units. However, based on updated assumptions as of December 31, 2015, we determined that the fair value of our Fluids Division was significantly in excess of its carrying value, which includes approximately $6.6 million of goodwill. Our Offshore Services and Maritech Divisions had no remaining goodwill as of December 31, 2015. Specifically to our Compression Division, demand for low-horsepower wellhead compression services and for sales of compressor equipment has decreased significantly and is expected to continue to be decreased for the foreseeable future. Accordingly, the fair value, including the market capitalization for CCLP, for the Compression reporting unit was less than its respective carrying value as of December 31, 2015. For our Production Testing Division, demand for production testing services has decreased in each of the market areas in which we operate, resulting in decreased estimated future cash flows. As a result, the fair value of the Production Testing reporting unit was also less than its respective carrying value as of December 31, 2015. After making the hypothetical purchase price adjustments as part of the second step of the goodwill impairment test, there was $92.4 million residual purchase price to be allocated to the goodwill of the Compression reporting unit and approximately $13.9 million residual purchase price to be allocated to the goodwill of the Production Testing reporting unit. Based on this analysis, we concluded that an impairment of $139.4 million of the $233.6 million of recorded goodwill for Compression and an impairment of $37.6 million of the $51.5 million of recorded goodwill for Production Testing was required.
Goodwill Impairments as of December 31, 2014. Based on the above assumptions as of December 31, 2014, we determined that the fair value of our Fluids Division was significantly in excess of its carrying value, which includes approximately $6.6 million of goodwill. The fair value of our Compression Division exceeded its carrying value by approximately 4%. Throughout 2014, challenging market conditions for our Production Testing and Offshore Services reporting units resulted in both of these reporting units performing below the expectations we had as of December 31, 2013. The late 2014 decrease in commodity prices further weakened these market conditions. Pricing and activity levels in many of the markets that the Production Testing reporting unit serves were affected by increased levels of competition. Our Offshore Services reporting unit experienced decreasing demand for its decommissioning, well abandonment, and contract diving services in the U.S. Gulf of Mexico, the primary market that it serves. Customer delays with regard to significant decommissioning and abandonment projects and the diminished pricing as a result of increased competition for customer projects combined to negatively affect 2014 profitability for the Offshore Services reporting unit. Accordingly, the fair values for the Production Testing and Offshore Services reporting units were less than their respective carrying values as of December 31, 2014. After making the hypothetical purchase price adjustments as part of the second step of the goodwill impairment test, there was $53.7 million residual purchase price to be allocated to the goodwill of Production Testing reporting unit and no residual purchase price to be allocated to the goodwill of Offshore Services. Based on this analysis, we concluded that an impairment of $60.4 million of recorded goodwill for Production Testing was required, and an impairment of the entire $3.9 million of recorded goodwill for Offshore Services was required.
Specific uncertainties affecting the estimated fair value of our Compression and Production Testing reporting units include the impact of competition, the trading prices of our common stock and the common unit price of CCLP, the price of oil and natural gas, future overall activity levels in the regions in which we operate, the activity levels of our significant customers, and other factors affecting the rate of future growth of these reporting units.
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These factors will continue to be reviewed and assessed during future periods. Negative developments with regard to these factors could have a further negative effect on the fair value of our Compression and Production Testing reporting units and could result in future additional impairment of goodwill. Subsequent to December 31, 2015, and as of March 3, 2016, the prices of our common stock and the common units of CCLP have continued to decline, and as a result future additional impairments are possible.
As of December 31, 2015, the carrying amount of goodwill for the Fluids, Production Testing, Compression, and Offshore Services reporting units are net of $23.8 million, $97.9 million, $139.4 million and $27.2 million, respectively, of accumulated impairment losses. The changes in the carrying amount of goodwill by reporting unit for the three year period ended December 31, 2015, are as follows:

|  | Fluids |  | Production Testing |  | Compression |  | Offshore Services |  | Maritech |  | Total
|  | (In Thousands)
Balance as of December 31, 2012 |  | $ | — |  |  | $ | 113,507 |  |  | $ | 72,161 |  |  | $ | 3,936 |  |  | $ | — |  |  | $ | 189,604 |
Goodwill adjustments |  | — |  |  | (1,445 | ) |  | — |  |  | — |  |  | — |  |  | (1,445 | )
Balance as of December 31, 2013 |  | — |  |  | 112,062 |  |  | 72,161 |  |  | 3,936 |  |  | — |  |  | 188,159 |
Goodwill acquired during the year |  | 6,636 |  |  | 5,809 |  |  | 161,387 |  |  |  |  |  |  | 173,832 |
Goodwill adjustments |  | — |  |  | (64,189 | ) |  | — |  |  | (3,936 | ) |  | — |  |  | (68,125 | )
Balance as of December 31, 2014 |  | 6,636 |  |  | 53,682 |  |  | 233,548 |  |  | — |  |  | — |  |  | 293,866 |
Goodwill adjustments |  | — |  |  | (39,775 | ) |  | (141,146 | ) |  | — |  |  |  |  | (180,921 | )
Balance as of December 31, 2015 |  | $ | 6,636 |  |  | $ | 13,907 |  |  | $ | 92,402 |  |  | $ | — |  |  | $ | — |  |  | $ | 112,945 |

Impairments of Long-Lived Assets
Impairments of long-lived assets, including identified intangible assets, are determined periodically when indicators of impairment are present. If such indicators are present, the determination of the amount of impairment is based on our judgments as to the future undiscounted operating cash flows to be generated from these assets throughout their remaining estimated useful lives. If these undiscounted cash flows are less than the carrying amount of the related asset, an impairment is recognized for the excess of the carrying value over its fair value. Assets held for disposal are recorded at the lower of carrying value or estimated fair value less estimated selling costs.
During the first quarter of 2014, the Offshore Services segment sold the TETRA DB-1 heavy lift barge for a sales price of $3.0 million. As a result, an additional impairment of approximately $9.3 million was recorded in December 2013 to reduce the carrying value of the TETRA DB-1 to the sales price.
During the fourth quarter of 2014, our Offshore Services segment recorded impairments of approximately $13.7 million, primarily associated with a portion of the carrying value of certain of its dive services vessels and equipment and other long lived assets due to expected decreased demand. Our Production Testing segment also recorded impairments of approximately $14.5 million, primarily associated with a portion of the carrying value of certain of its production testing equipment and certain identified intangible assets. Our Fluids Division also recorded impairments of approximately $5.2 million associated with certain of its water management business assets.
During the fourth quarter of 2015, our Compression and Production Testing segments recorded impairments of approximately $6.3 million and $12.3 million, respectively, associated with a portion of the carrying value of certain of long-lived assets due to expected decreased demand, and our Compression segment recorded approximately $5.7 million of impairments associated with certain identified intangible assets. Our Fluids Division also recorded impairments of approximately $19.9 million associated with certain of its water management business assets.
Decommissioning Liabilities
Related to Maritech’s remaining oil and gas property decommissioning liabilities, we estimate the third-party fair values (including an estimated profit) to plug and abandon wells, decommission the pipelines and platforms, and clear the sites, and we use these estimates to record Maritech’s decommissioning liabilities, net of amounts allocable to joint interest owners.
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In estimating the decommissioning liabilities, we perform detailed estimating procedures, analysis, and engineering studies. Whenever practical and cost effective, Maritech will utilize the services of its affiliated companies to perform well abandonment and decommissioning work. When these services are performed by an affiliated company, all recorded intercompany revenues are eliminated in the consolidated financial statements. The recorded decommissioning liability associated with a specific property is fully extinguished when the property is completely abandoned. The recorded liability is first reduced by all cash expenses incurred to abandon and decommission the property. If the recorded liability exceeds (or is less than) our actual out-of-pocket costs, the difference is credited (or charged) to earnings in the period in which the work is performed. We review the adequacy of our decommissioning liabilities whenever indicators suggest that the estimated cash flows underlying the liabilities have changed materially. The amount of work performed or estimated to be performed on a Maritech property asset retirement obligation may often exceed amounts previously estimated for numerous reasons. Property conditions encountered, including subsea, geological, or downhole conditions, may be different from those anticipated at the time of estimation due to the age of the property and the quality of information available about the particular property conditions. Additionally, the cost of performing work at locations damaged by hurricanes is particularly difficult to estimate due to the unique conditions encountered, including the uncertainty regarding the extent of physical damage to many of the structures. Lastly, previously plugged and abandoned wells have later exhibited a buildup of pressure, which is evidenced by gas bubbles coming from the plugged well head. Remediation work at previously abandoned well sites is particularly costly due to the lack of a platform from which to base these activities. The timing and amounts of these cash flows are subject to changes in the energy industry environment and may result in additional liabilities to be recorded, which, in turn, would result in direct charges to earnings. Decommissioning work performed for the years 2015, 2014, and 2013 was $10.3 million, $63.3 million, and $119.6 million, respectively. For a further discussion of adjustments and other activity related to Maritech’s decommissioning liabilities, including significant adjustments made during 2015, 2014, and 2013, see Note H – Decommissioning and Other Asset Retirement Obligations.
Environmental Liabilities
Environmental expenditures that result in additions to property and equipment are capitalized, while other environmental expenditures are expensed. Environmental remediation liabilities are recorded on an undiscounted basis when environmental assessments or cleanups are probable and the costs can be reasonably estimated. Estimates of future environmental remediation expenditures often consist of a range of possible expenditure amounts, a portion of which may be in excess of amounts of liabilities recorded. In such an instance, we disclose the full range of amounts reasonably possible of being incurred. Any changes or developments in environmental remediation efforts are accounted for and disclosed each quarter as they occur. Any recoveries of environmental remediation costs from other parties are recorded as assets when their receipt is deemed probable.
Complexities involving environmental remediation efforts can cause estimates of the associated liability to be imprecise. Factors that cause uncertainties regarding the estimation of future expenditures include, but are not limited to, the effectiveness of the anticipated work plans in achieving targeted results and changes in the desired remediation methods and outcomes as prescribed by regulatory agencies. Uncertainties associated with environmental remediation contingencies are pervasive and often result in wide ranges of reasonably possible outcomes. Estimates developed in the early stages of remediation can vary significantly. Normally, a finite estimate of cost does not become fixed and determinable at a specific point in time. Rather, the costs associated with environmental remediation become estimable as the work is performed and the range of ultimate cost becomes more defined. It is possible that cash flows and results of operations could be materially affected by the impact of the ultimate resolution of these contingencies.
Revenue Recognition
We recognize revenue using the following criteria: (a) persuasive evidence of an exchange arrangement exists; (b) delivery has occurred or services have been rendered; (c) the buyer’s price is fixed or determinable; and (d) collectability is reasonably assured. Sales terms for our products are FOB shipping point, with title transferring at the point of shipment. Revenue is recognized at the point of transfer of title. With regard to longer-term lump-sum contracts, revenues are recognized using the percentage-of-completion method based on the ratio of costs incurred to total estimated costs at completion. Total project revenue and cost estimates for lump-sum contracts are reviewed periodically as work progresses, and adjustments are reflected in the period in which such estimates are revised. Provisions for estimated losses on such contracts are made in the period such losses are determined. Occasionally, we have contracts that contain multiple deliverables, and for such contracts the recognition of
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revenue is determined based on the realized market values received by the customer as well as the timing of collections under the contract. Collections associated with progressive billings to customers for the construction of compression equipment by our Compression Division is included in unearned income in the consolidated balance sheets.
Services and Rentals Revenues and Costs
A portion of our services and rentals revenues consists of lease rental income pursuant to operating lease arrangements for compressors and other equipment assets. The following operating lease revenues and associated costs were included in services and rentals revenues and cost of services and rentals, respectively, in the accompanying consolidated statements of operations for each of the following periods:

| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
| (In Thousands)
Rental revenue | $ | 136,384 |  |  | $ | 91,509 |  |  | $ | 20,492 |
Rental expenses | $ | 67,718 |  |  | $ | 43,240 |  |  | $ | 8,422 |

Operating Costs
Cost of product sales includes direct and indirect costs of manufacturing and producing our products, including raw materials, fuel, utilities, labor, overhead, repairs and maintenance, materials, services, transportation, warehousing, equipment rentals, insurance, and certain taxes. In addition, cost of product sales includes oil and gas operating expense. Cost of services and rentals includes operating expenses we incur in delivering our services, including labor, equipment rental, fuel, repair and maintenance, transportation, overhead, insurance, and certain taxes. We include in product sales revenues the reimbursements we receive from customers for shipping and handling costs. Shipping and handling costs are included in cost of product sales. Amounts we incur for “out-of-pocket” expenses in the delivery of our services are recorded as cost of services and rentals. Reimbursements for “out-of-pocket” expenses we incur in the delivery of our services are recorded as service revenues. Depreciation, amortization, and accretion includes depreciation expense for all of our facilities, equipment and vehicles, amortization expense on our intangible assets, and accretion expense related to our decommissioning and other asset retirement obligations.
We include in general and administrative expense all costs not identifiable to our specific product or service operations, including divisional and general corporate overhead, professional services, corporate office costs, sales and marketing expenses, insurance, and certain taxes.
Repair Costs and Insurance Recoveries
Our Maritech subsidiary incurred significant damage to the majority of its offshore oil and gas producing platforms as a result of Hurricane Ike during 2008 and Hurricanes Katrina and Rita during 2005. As of December 31, 2015, the remaining work to be performed consists primarily of decommissioning and debris removal efforts on one of Maritech's production platforms that was destroyed. We estimate that the remaining future decommissioning and debris removal efforts associated with this remaining platform will cost approximately $7.8 million, net to our interest, and has been accrued as part of Maritech’s decommissioning liabilities. The actual cost to complete this hurricane response work could exceed this estimate and could result in significant charges to earnings in future periods.
When it is economical to purchase, we typically maintain insurance protection that we believe to be customary and in amounts sufficient to reimburse us for a majority of our casualty losses. Our insurance coverage is subject to certain overall coverage limits and deductibles. With regard to costs incurred that we believe will qualify for coverage under our various insurance policies, we recognize anticipated insurance recoveries when collection is deemed probable. Any recognition of anticipated insurance recoveries is used to offset the original charge to which the insurance recovery relates.
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During December 2010, we initiated legal proceedings against one of Maritech’s underwriters that had disputed that certain hurricane damage related costs incurred or to be incurred qualified as covered costs pursuant to Maritech's windstorm insurance policies. In February 2013, we entered into a settlement agreement with the underwriter, whereby we received $7.6 million, a portion of which was credited to operating expenses during 2013.
Repair costs incurred and the net book value of any destroyed assets which are covered under our insurance policies that are anticipated to be recovered are included in accounts receivable. Repair costs not considered probable of collection are charged to earnings. Insurance recoveries in excess of destroyed asset carrying values and repair costs incurred are credited to earnings when received.
Equity-Based Compensation
We and CCLP have various equity incentive compensation plans which provide for the granting of restricted common stock, options for the purchase of our common stock, and other performance-based, equity-based compensation awards to our executive officers, key employees, nonexecutive officers, consultants, and directors. Total equity-based compensation expense, net of taxes, for the three years ended December 31, 2015, 2014, and 2013, was $13.9 million, $4.7 million, and $4.8 million, respectively. Equity-based compensation expense during 2015 includes an immaterial correction of approximately $6.7 million. For further discussion of equity-based compensation, see Note K - Equity-Based Compensation.
Income Taxes
Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis amounts. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates is recognized as income or expense in the period that includes the enactment date. Beginning in 2014, a portion of the carrying value of certain deferred tax assets is subjected to a valuation allowance. See Note E - Income Taxes for further discussion.
Income (Loss) per Common Share
The calculation of basic earnings per share excludes any dilutive effects of options. The calculation of diluted earnings per share includes the dilutive effect of stock options, which is computed using the treasury stock method during the periods such options were outstanding. A reconciliation of the common shares used in the computations of income (loss) per common and common equivalent shares is presented in Note O – Income (Loss) Per Share.
Foreign Currency Translation
We have designated the euro, the British pound, the Norwegian krone, the Canadian dollar, the Brazilian real, the Argentine peso, and the Mexican peso, respectively, as the functional currency for our operations in Finland and Sweden, the United Kingdom, Norway, Canada, Brazil, Argentina, and certain of our operations in Mexico. Effective January 1, 2014, we changed the functional currency in Argentina from the U.S. dollar to the Argentina peso. The U.S. dollar is the designated functional currency for all of our other foreign operations. The cumulative translation effect of translating the applicable accounts from the functional currencies into the U.S. dollar at current exchange rates is included as a separate component of equity. Foreign currency exchange gains and (losses) are included in Other Income (Expense) and totaled $(1.7) million, $(1.2) million, and $(1.8) million for the years ended December 31, 2015, 2014 and 2013, respectively.
Fair Value Measurements
Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date” within an entity’s principal market, if any. The principal market is the market in which the reporting entity would sell the asset or transfer the liability with the greatest volume and level of activity, regardless of whether it is the market in which the entity will ultimately transact for a particular asset or liability or if a different market is potentially more advantageous. Accordingly, this exit price concept may result in a fair value that may differ from the transaction price or market price of the asset or liability.
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Under generally accepted accounting principles, the fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value. Fair value measurements should maximize the use of observable inputs and minimize the use of unobservable inputs, where possible. Observable inputs are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs may be needed to measure fair value in situations where there is little or no market activity for the asset or liability at the measurement date and are developed based on the best information available in the circumstances, which could include the reporting entity’s own judgments about the assumptions market participants would utilize in pricing the asset or liability.
We utilize fair value measurements to account for certain items and account balances within our consolidated financial statements. Fair value measurements are utilized in the allocation of purchase consideration for acquisition transactions to the assets and liabilities acquired, including intangible assets and goodwill (a level 3 fair value measurement). In addition, we utilize fair value measurements in the initial recording of our decommissioning and other asset retirement obligations. Fair value measurements may also be utilized on a nonrecurring basis, such as for the impairment of long-lived assets, including goodwill (a level 3 fair value measurement). The fair value of our financial instruments, which include cash, restricted cash, accounts receivable, short-term borrowings, and long-term debt pursuant to our bank credit agreements, approximate their carrying amounts. The aggregate fair values of our long-term Senior Notes and Senior Secured Notes (as such terms are herein defined) at December 31, 2015 and 2014, were approximately $229.8 million and $310.7 million, respectively, compared to carrying amounts of $385.0 million and $305.0 million, respectively, as current interest rates on those dates were different than the stated interest rates on the Senior Notes and Senior Secured Notes. The fair values of the publicly tradable CCLP Senior Notes (as herein defined) at December 31, 2015, were approximately $259.9 million (a level 2 fair value measurement). As of December 31, 2014, the fair value of the CCLP Senior Notes was approximately $354.9 million. The fair values of the CCLP Senior Notes compared to a face amount of approximately $350.0 million (See Note C - Long-Term Debt and Other Borrowings, for further discussion), as current rates on those dates were different from the stated interest rates on the CCLP Senior Notes. We calculated the fair values of our Senior Notes, our Senior Secured Notes and the CCLP Senior Notes as of December 31, 2015 and 2014, (excluding the CCLP Senior Notes as of December 31, 2015, since they are publicly tradable) internally, using current market conditions and average cost of debt (a level 2 fair value measurement).
We calculate the fair value of the liability for our contingent purchase price consideration obligation in accordance with the WIT Water Transfer, LLC (acquired in January 2014 and doing business as TD Water Transfer) share purchase agreement based upon a probability weighted calculation using the actual and anticipated earnings of the acquired operations (a level 3 fair value measurement). The fair value of the liability for the TD Water Transfer contingent purchase price consideration at December 31, 2015 and 2014, was $0.
We also utilize fair value measurements on a recurring basis in the accounting for our foreign currency forward sale derivative contracts. For these fair value measurements, we utilize the quoted value as determined by our counterparty financial institution (a level 2 fair value measurement). A summary of these fair value measurements as of December 31, 2015 and 2014, is as follows:

|  |  |  | Fair Value Measurements Using
|  | Total as of |  | Quoted Prices in Active Markets for Identical Assets or Liabilities |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs
Description |  | Dec 31, 2015 |  | (Level 1) |  | (Level 2) |  | (Level 3)
|  | (In Thousands)
Asset for foreign currency derivative contracts |  | $ | 23 |  |  | $ | — |  |  | $ | 23 |  |  | $ | — |
Liability for foreign currency derivative contracts |  | (385 | ) |  | — |  |  | (385 | ) |  | — |
Acquisition contingent consideration liability |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | (362 | ) |  |  |  |  |  |

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A summary of these fair value measurements as of December 31, 2014, is as follows:

|  |  |  | Fair Value Measurements Using
|  | Total as of |  | Quoted Prices in Active Markets for Identical Assets or Liabilities |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs
Description |  | Dec 31, 2014 |  | (Level 1) |  | (Level 2) |  | (Level 3)
|  | (In Thousands)
Asset for foreign currency derivative contracts |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Liability for foreign currency derivative contracts |  | (174 | ) |  | — |  |  | (174 | ) |  | — |
Acquisition contingent consideration liability |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | (174 | ) |  |  |  |  |  |

During the fourth quarter of 2015, in connection with the review of goodwill impairment for our Compression and Production Testing Divisions, these segments recorded total impairment charges of approximately $177.0 million, reflecting the decreased fair value for certain assets. During 2014, in connection with the review of goodwill impairment of our Offshore Services and Production Testing Divisions, these segments recorded total impairment charges of approximately $64.3 million, reflecting the decreased fair value for these assets. For further discussion, see "Goodwill" and "Impairment of Long-Lived Assets" section above. The fair values used in these impairment calculations were estimated based on a variety of measurements, including current replacement cost, current market prices being received for similar vessels, and discounted estimated future cash flows, all of which are based on significant unobservable inputs (Level 3) in accordance with the fair value hierarchy. A summary of these nonrecurring fair value measurements as of December 31, 2015, using the fair value hierarchy is as follows:

|  |  |  | Fair Value Measurements Using |  |
|  | Total as of |  | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Year-to-Date Impairment Losses
Description |  | Dec 31, 2015 |  |  |  |
|  | (In Thousands)
Compression equipment |  | $ | 772 |  |  | $ | — |  |  | $ | — |  |  | $ | 772 |  |  | $ | 6,300 |
Compression intangible assets |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,659 |
Compression goodwill |  | 92,402 |  |  | — |  |  | — |  |  | 92,402 |  |  | 139,444 |
Production Testing equipment |  | 14,476 |  |  | — |  |  | — |  |  | 14,476 |  |  | 12,310 |
Production Testing goodwill |  | 13,907 |  |  | — |  |  | — |  |  | 13,907 |  |  | 37,562 |
Fluids equipment and facilities |  | 6,323 |  |  | — |  |  | — |  |  | 6,323 |  |  | 19,889 |
Other |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total |  | $ | 127,880 |  |  |  |  |  |  |  |  | $ | 221,164 |

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A summary of these nonrecurring fair value measurements as of December 31, 2014, using the fair value hierarchy is as follows:

|  |  |  | Fair Value Measurements Using |  |
|  | Total as of |  | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Year-to-Date Impairment Losses
Description |  | Dec 31, 2014 |  |  |  |
|  | (In Thousands)
Offshore Services assets |  | $ | 103,155 |  |  | $ | — |  |  | $ | — |  |  | $ | 103,155 |  |  | $ | 13,308 |
Offshore Services goodwill |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,936 |
Production Testing equipment |  | 94,328 |  |  | — |  |  | — |  |  | 94,328 |  |  | 7,646 |
Production Testing intangible assets |  | 34,941 |  |  | — |  |  | — |  |  | 34,941 |  |  | 6,831 |
Production Testing goodwill |  | 53,681 |  |  | — |  |  | — |  |  | 53,681 |  |  | 60,359 |
Fluids equipment and facilities |  | 1,225 |  |  | — |  |  | — |  |  | 1,225 |  |  | 5,201 |
Other |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,856 |
Total |  | $ | 287,330 |  |  |  |  |  |  |  |  | $ | 99,137 |

New Accounting Pronouncements
In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, "Revenue from Contracts with Customers." ASU No. 2014-09 supersedes the revenue recognition requirements in Accounting Standards Codification ("ASC") 605, Revenue Recognition, and most industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU is effective for annual periods beginning after December 15, 2017, and interim periods within those years, under either full or modified retrospective adoption. We are currently assessing the potential effects of these changes to our consolidated financial statements.
In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements - Going Concern.” The ASU provides guidance on management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and in certain circumstances to provide related footnote disclosures. The ASU is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter. Early adoption is permitted. We do not expect the adoption of this standard to have a material impact on our consolidated financial statements.
In April 2015, the FASB issued ASU No. 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” The ASU requires entities that have historically presented debt issuance costs as an asset to present those costs as a direct deduction from the carrying amount of the related debt liability. This presentation will result in the debt issuance costs being presented the same way debt discounts have historically been handled. The ASU does not change the recognition, measurement, or subsequent measurement guidance for debt issuance costs. The ASU is effective for the annual period beginning after December 15, 2015, and interim periods within those annual periods and is to be applied retrospectively. Early adoption is permitted. We plan to adopt this change retrospectively, and do not expect the adoption of this standard to have a material impact on our consolidated financial statements.
In July 2015, the FASB issued ASU No. 2015-11, “Simplifying the Measurement of Inventory,” which simplifies the subsequent measurement of inventory by requiring entities to measure inventory at the lower of cost or net realizable value, except for inventory measured using the last-in, first-out (LIFO) or the retail inventory methods. The ASU requires entities to compare the cost of inventory to one measure - net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The ASU is effective for the annual period beginning after December 15,
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2015 and interim periods within those annual periods, with early adoption permitted, and is to be applied prospectively. We do not expect the adoption of this standard to have a material impact on our consolidated financial statements.
In September 2015, the FASB issued ASU No. 2015-16, “Simplifying the Accounting for Measurement Period Adjustments,” which requires that adjustments to provisional amounts identified during the measurement period of a business combination be recognized in the reporting period in which those adjustments are determined, including the effect on earnings, if any, calculated as if the accounting had been completed at the acquisition date. The ASU eliminates the previous requirement to retrospectively account for such adjustments and requires additional disclosures related to the income statement effects of adjustments to provisional amounts identified during the measurement period. The ASU is effective for the annual period beginning after December 15, 2015, and interim periods within those annual periods, with early adoption permitted, and is to be applied prospectively. We do not expect the adoption of this standard to have a material impact on our consolidated financial statements.
In November 2015, the FASB issued ASU 2015-17, Income Taxes Balance Sheet Classification of Deferred Taxes ("ASU 2015-17"). The update changes how deferred taxes are classified on the balance sheet, eliminating the existing requirement for organizations to present deferred tax liabilities and assets as current and noncurrent in a classified balance sheet. Instead, organizations will be required to classify all deferred tax assets and liabilities as noncurrent. The ASU is effective for fiscal years and interim periods within those years beginning after December 15, 2016. As permitted by ASU 2015-17, we elected to early adopt this guidance effective December 31, 2015, using the retrospective adoption. The impact of the retrospective adoption of this standard was not material to our consolidated financial statements.
NOTE C – ACQUISITIONS
Acquisition of Compressor Systems, Inc.
On August 4, 2014, a subsidiary of CCLP acquired all of the outstanding capital stock of CSI for $825.0 million cash (the "CSI Acquisition"). Prior to the acquisition, CSI owned one of the largest fleets of natural gas compressor packages in the United States. Headquartered in Midland, Texas, CSI fabricates, sells, and maintains natural gas compressors and provides a full range of compression products and services that covers compression needs throughout the entire natural gas production and transportation cycle to natural gas and oil producing clients. CSI derives revenues through three primary business lines: compression and related services, equipment and parts sales, and aftermarket services. Strategically, the acquisition affords the Compression Division the opportunity to capture significant synergies associated with its product and service offerings and its fabrication operations, to further penetrate new and existing markets, and to achieve administrative efficiencies and other strategic benefits.
Our allocation of the purchase price to the estimated fair value of CSI's net assets is as follows (in thousands):

Current assets | $ | 101,411 |
Property and equipment | 571,706 |
Intangible assets | 68,000 |
Goodwill | 161,387 |
Total assets acquired | 902,504 |
Current liabilities | 77,504 |
Total liabilities assumed | 77,504 |
Net assets acquired | $ | 825,000 |

F-22

The allocation of purchase price includes approximately $161.4 million allocated to deductible goodwill recorded and is supported by the strategic benefits discussed above that are expected to be generated from the acquisition. Adjustments to the allocation of purchase price affecting inventory, property, plant and equipment, intangible assets, and other current assets and liabilities have been made and are reflected in the accompanying consolidated balance sheets as of December 31, 2015 and 2014. The adjustment to the previously presented goodwill balance as of December 31, 2014, was $0.1 million. These adjustments in 2015 to the allocation of purchase price for long-lived assets did not have a material impact on the depreciation and amortization of these assets. The acquired property, plant, and equipment is stated at fair value, and depreciation of the acquired property, plant, and equipment is computed using the straight-line method over the estimated useful lives of each asset. Buildings are depreciated using useful lives of 15 to 30 years. Machinery and equipment is depreciated using useful lives of 2 to 20 years. Automobiles and trucks are depreciated using useful lives of 3 to 4 years. The acquired intangible assets as of the acquisition date represent approximately $33.7 million for the trademark/trade name, approximately $21.4 million for customer relationships, and approximately $12.9 million of other intangible assets that are stated at estimated fair value and are amortized on a straight-line basis over their estimated useful lives, ranging from 2 to 15 years. These identified intangible assets are recorded net of approximately $6.8 million of accumulated amortization as of December 31, 2015.
For the year ended December 31, 2014, our revenues, depreciation and amortization, and pretax earnings included $152.5 million, $25.2 million, and $15.8 million, respectively, associated with the CSI Acquisition after the closing on August 4, 2014. In addition, CSI Acquisition-related costs of approximately $5.5 million were incurred during the year ended December 31, 2014, consisting of external legal fees, transaction consulting fees, and due diligence costs. These costs have been recognized in general and administrative expenses in the consolidated statements of operations. Approximately $16.6 million of deferred financing costs related to the CSI Acquisition were incurred as of the acquisition date and included in Other Assets and are being amortized over the term of the related debt. An additional $9.3 million of interim financing costs related to the CSI Acquisition was incurred and is reflected in Other Expense during the year ended December 31, 2014.
Acquisition of Limited Liability Company Interest
On January 16, 2014, we finalized the purchase of the remaining 50% ownership interest of Ahmad Albinali & TETRA Arabia Company Ltd. (TETRA Arabia, a Saudi Arabian limited liability company) for consideration of $25.2 million. The closing of this transaction was pursuant to the terms of the Share Sale and Purchase Agreement entered into as of October 1, 2013, with the existing outside shareholder in TETRA Arabia. TETRA Arabia is a provider of production testing services, offshore rig cooling services, and clear brine fluids products and related services to its primary customer in Saudi Arabia. The acquisition of the remaining 50% interest of TETRA Arabia results in the Production Testing and Fluids segments owning a 100% interest in its Saudi Arabian operations, which it will operate directly through the TETRA Arabia entity. Prior to the transaction, our 50% ownership interest in TETRA Arabia was accounted for under the equity method of accounting, whereby our investment was classified as Other Assets in our consolidated balance sheets, and our share of company earnings was classified as Other Income in the consolidated statements of operations. Following the acquisition, TETRA Arabia is consolidated as a wholly owned subsidiary. The $25.2 million purchase price for the 50% ownership interest includes $15.0 million that was paid at closing and an additional $10.2 million that was paid on June 16, 2014.
As a result of the purchase of the remaining 50% ownership interest of TETRA Arabia, during the first quarter of 2014, we remeasured to fair value our existing investment carrying value in TETRA Arabia based on estimated future cash flows which resulted in a calculated fair value of approximately $21.8 million (a level 3 fair value measurement). We allocated this calculated fair value to the applicable consolidated balance sheet line items and recorded a remeasurement gain of approximately $5.7 million. Additionally, we recorded a charge to earnings of approximately $2.9 million associated with a similar fair value measurement related to the termination of our previous relationship with the other shareholder. The charge to earnings and the remeasurement gain were included in other (income) expense in the Consolidated Statement of Operations for the year ended December 31, 2014. We allocated the purchase price as well as the remeasured value of our existing investment based on the fair values of the assets and liabilities acquired or remeasured, which consisted of a total of approximately $18.5 million of net working capital (including $12.0 million of cash acquired), $1.3 million of property, plant, and equipment, approximately $22.5 million of certain intangible assets (primarily a customer relationship asset), $4.5 million of deferred tax liabilities, and approximately $5.8 million of nondeductible goodwill (allocated to the Production Testing Division). For the year ended December 31, 2014, our revenues, depreciation and amortization, and income before taxes included $38.0 million, $1.5 million, and $8.9 million, respectively, associated with the acquired operations of TETRA Arabia after the closing in January 2014.
F-23

Acquisition of TD Water Transfer
On January 29, 2014, we acquired the assets and operations of WIT Water Transfer, LLC (doing business as TD Water Transfer) for a cash purchase price of $15.0 million paid at closing. In addition, additional contingent consideration of up to $8.0 million may be paid, depending on a defined measure of earnings over each of the two years subsequent to closing. TD Water Transfer is a provider of water management services to oil and gas operators in the South Texas and North Dakota regions, allowing the Fluids Division to serve customers in additional basins in the U.S.
We allocated the purchase price to the fair value of the assets and liabilities acquired, which consisted of approximately $7.3 million of property, plant and equipment, approximately $3.2 million of certain intangible assets, approximately $6.6 million of deductible goodwill, and approximately $2.3 million of liabilities associated with the contingent purchase price consideration. The fair value of the obligation to pay the contingent purchase price consideration was calculated based on the anticipated earnings for our water management services operations in the South Texas and North Dakota regions over each of the two twelve month periods subsequent to the closing and could increase (to $8.0 million) or decrease (to $0) depending on actual and expected earnings in these regions going forward. Increases or decreases in the value of the anticipated contingent purchase price consideration liability due to changes in the amounts paid or expected to be paid will be charged or credited to earnings in the period in which such changes occur. During the year ended December 31, 2014, the liability associated with the contingent consideration was adjusted downward by approximately $2.3 million, and this amount was credited to earnings during the period. The $6.6 million of goodwill recorded to the Fluids segment as a result of the TD Water Transfer acquisition is supported by the expected strategic benefits discussed above to be generated from the acquisition.
Pro Forma Financial Information (Unaudited)
The pro forma information presented below has been prepared to give effect to the acquisition of the remaining 50% ownership interest of TETRA Arabia and the acquisition of CSI as if each of the transactions had occurred at the beginning of the periods presented. The pro forma information includes the impacts of the allocation of the acquisition purchase price for each acquisition on depreciation and amortization. The pro forma information also excludes the impact of the remeasurement gain and charge to earnings recorded in connection with the acquisition of the remaining 50% interest in TETRA Arabia as well as the CSI Acquisition and financing costs charged to earnings during the 2014 periods. The pro forma information is presented for illustrative purposes only and is based on estimates and assumptions we deem appropriate. The impact of the acquisition of TD Water Transfer is not significant and is, therefore, not included in the pro forma information below. The following pro forma information is not necessarily indicative of the historical results that would have been achieved if the acquisition transactions had occurred in the past, and our operating results may have been different from those reflected in the pro forma information below. Therefore, the pro forma information should not be relied upon as an indication of the operating results that we would have achieved if the transactions had occurred at the beginning of the periods presented or the future results that we will achieve after the transactions.

| Year Ended
| December 31, 2014
| (In Thousands)
Revenues | $ | 1,287,059 |
Depreciation, amortization, and accretion | $ | 160,686 |
Gross profit | $ | 122,636 |
Net income (loss) | $ | (166,468 | )
Net income (loss) attributable to TETRA stockholders | $ | (174,771 | )
Per share information: |  |
Net income (loss) attributable to TETRA stockholders |  |
Basic | $ | (2.22 | )
Diluted | $ | (2.22 | )

F-24

NOTE D — LEASES
We lease some of our transportation equipment, office space, warehouse space, operating locations, and machinery and equipment. Certain facility storage tanks being constructed are leased pursuant to a ten year term, which is classified as a capital lease. Capitalized costs pursuant to a capital lease are depreciated over the term of the lease. The office, warehouse, and operating location leases, which vary from one to twenty-five year terms that expire at various dates through 2027 and are generally renewable for three and five year periods on similar terms, are classified as operating leases. Transportation equipment leases expire at various dates through 2020 and are also classified as operating leases. The office, warehouse, and operating location leases, and machinery and equipment leases generally require us to pay all maintenance and insurance costs.
Future minimum lease payments by year and in the aggregate, under non-cancelable capital and operating leases with terms of one year or more, and including the headquarters facility lease discussed above, consist of the following at December 31, 2015:

|  | Capital Lease |  | Operating Leases
|  | (In Thousands)
2016 |  | $ | 146 |  |  | $ | 21,302 |
2017 |  | 154 |  |  | 11,976 |
2018 |  | 162 |  |  | 8,908 |
2019 |  | 103 |  |  | 7,138 |
2020 |  | — |  |  | 6,498 |
After 2020 |  | — |  |  | 47,287 |
Total minimum lease payments |  | $ | 565 |  |  | $ | 103,109 |

Rental expense for all operating leases was $37.1 million, $57.4 million, and $37.7 million in 2015, 2014, and 2013, respectively.
NOTE E — INCOME TAXES
The income tax provision (benefit) attributable to continuing operations for the years ended December 31, 2015, 2014, and 2013, consists of the following:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Current |  |  |  |  |  |  |  |  |
Federal |  | $ | (1,310 | ) |  | $ | (69 | ) |  | $ | 530 |
State |  | 2,022 |  |  | (195 | ) |  | (225 | )
Foreign |  | 7,371 |  |  | 10,318 |  |  | 6,065 |
|  | 8,083 |  |  | 10,054 |  |  | 6,370 |
Deferred |  |  |  |  |  |  |  |  |
Federal |  | 191 |  |  | (1,509 | ) |  | (6,685 | )
State |  | (1,613 | ) |  | 3,784 |  |  | (1,121 | )
Foreign |  | 1,043 |  |  | (2,625 | ) |  | (2,018 | )
|  | (379 | ) |  | (350 | ) |  | (9,824 | )
Total tax provision (benefit) |  | $ | 7,704 |  |  | $ | 9,704 |  |  | $ | (3,454 | )

A reconciliation of the provision (benefit) for income taxes attributable to continuing operations, computed by applying the federal statutory rate to income (loss) before income taxes and the reported income taxes, is as follows:
F-25

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Income tax provision (benefit) computed at statutory federal income tax rates |  | $ | (70,617 | ) |  | $ | (55,254 | ) |  | $ | (45 | )
State income taxes (net of federal benefit) |  | (608 | ) |  | (1,730 | ) |  | (608 | )
Nondeductible meals and entertainment |  | 909 |  |  | 1,433 |  |  | 1,382 |
Impact of international operations |  | (1,880 | ) |  | (7,408 | ) |  | (3,504 | )
Goodwill impairments |  | 20,412 |  |  | 7,442 |  |  | — |
Valuation allowance |  | 55,392 |  |  | 67,781 |  |  | (301 | )
Other |  | 4,096 |  |  | (2,560 | ) |  | (378 | )
Total tax provision (benefit) |  | $ | 7,704 |  |  | $ | 9,704 |  |  | $ | (3,454 | )

The provision (benefit) for income taxes includes amounts related to the anticipated repatriation of certain earnings of our non-U.S. subsidiaries. Undistributed earnings above the amounts upon which taxes have been provided, which was $39.4 million at December 31, 2015, are intended to be permanently invested. It is not practicable to determine the amount of applicable taxes that would be incurred if any such earnings were repatriated.
Income (loss) before taxes and discontinued operations includes the following components:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Domestic |  | $ | (195,815 | ) |  | $ | (138,640 | ) |  | $ | (14,322 | )
International |  | (5,948 | ) |  | (19,231 | ) |  | 14,194 |
Total |  | $ | (201,763 | ) |  | $ | (157,871 | ) |  | $ | (128 | )

A reconciliation of the beginning and ending amount of our gross unrecognized tax benefit liability is as follows:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Gross unrecognized tax benefits at beginning of period |  | $ | 1,959 |  |  | $ | 2,018 |  |  | $ | 2,327 |
Decreases in tax positions for prior years |  | — |  |  | — |  |  | (118 | )
Increases in tax positions for current year |  | 120 |  |  | 191 |  |  | 202 |
Lapse in statute of limitations |  | (124 | ) |  | (250 | ) |  | (393 | )
Gross unrecognized tax benefits at end of period |  | $ | 1,955 |  |  | $ | 1,959 |  |  | $ | 2,018 |

We recognize interest and penalties related to uncertain tax positions in income tax expense. During the years ended December 31, 2015, 2014, and 2013, we recognized $0.3 million, $0.2 million, and $(0.2) million, respectively, of interest and penalties to the provision for income tax. As of December 31, 2015 and 2014, we had $2.4 million and $2.1 million, respectively, of accrued potential interest and penalties associated with these uncertain tax positions. The total amount of unrecognized tax benefits that would affect our effective tax rate if recognized is $3.5 million and $2.1 million as of December 31, 2015 and 2014, respectively. We do not expect a significant change to the unrecognized tax benefits during the next twelve months.
We file tax returns in the U.S. and in various state, local, and non-U.S. jurisdictions. The following table summarizes the earliest tax years that remain subject to examination by taxing authorities in any major jurisdiction in which we operate:
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Jurisdiction | Earliest Open Tax Period
United States – Federal | 2012
United States – State and Local | 2002
Non-U.S. jurisdictions | 2009

We use the liability method for reporting income taxes, under which current and deferred tax assets and liabilities are recorded in accordance with enacted tax laws and rates. Under this method, at the end of each period, the amounts of deferred tax assets and liabilities are determined using the tax rate expected to be in effect when the taxes are actually paid or recovered. We establish a valuation allowance to reduce the deferred tax assets when it is more likely than not that some portion or all of the deferred tax assets will not be realized. We considered all available evidence, both positive and negative, in determining whether, based on the weight of that evidence, a valuation allowance is needed for some portion or all of our deferred tax assets. In determining the need for a valuation allowance on our deferred tax assets we placed greater weight on recent and objectively verifiable current information, as compared to more forward-looking information that is used in valuating other assets on the balance sheet. While we have considered tax planning strategies in assessing the need for the valuation allowance, there can be no guarantee that we will be able to realize all of our deferred tax assets. Significant components of our deferred tax assets and liabilities as of December 31, 2015 and 2014, are as follows:

|  | December 31,
|  | 2015 |  | 2014
|  | (In Thousands)
Net operating losses |  | $ | 91,973 |  |  | $ | 88,867 |
Foreign tax credits and alternative minimum tax credits |  | 19,772 |  |  | 15,910 |
Accruals |  | 30,033 |  |  | 35,135 |
Income recognized for tax not book |  | 2,608 |  |  | — |
All other |  | 8,686 |  |  | 2,855 |
Total deferred tax assets |  | 153,072 |  |  | 142,767 |
Valuation allowance |  | (126,673 | ) |  | (73,696 | )
Net deferred tax assets |  | $ | 26,399 |  |  | $ | 69,071 |

|  | December 31,
|  | 2015 |  | 2014
|  | (In Thousands)
Depreciation and amortization for tax in excess of book expense |  | $ | 34,146 |  |  | $ | 77,751 |
All other |  | 1,695 |  |  | 844 |
Total deferred tax liability |  | 35,841 |  |  | 78,595 |
Net deferred tax liability |  | $ | 9,442 |  |  | $ | 9,524 |

We believe that it is more likely than not we will not realize all the tax benefits of the deferred tax assets within the allowable carryforward period. Therefore, an appropriate valuation allowance has been provided. The valuation allowance as of December 31, 2015 and 2014, primarily relates to federal deferred tax assets. The increase (decrease) in the valuation allowance during the years ended December 31, 2015, 2014, and 2013, were $53.0 million, $69.9 million, and $(0.3) million, respectively.
At December 31, 2015, we had approximately $92.0 million of federal, foreign, and state net operating loss carryforwards. In those countries and states in which net operating losses are subject to an expiration period, our loss carryforwards, if not utilized, will expire at various dates from 2016 through 2035. At December 31, 2015, we had $18.8 million of foreign tax credits available to offset future payment of federal income taxes. The foreign tax credits expire in varying amounts from 2020 through 2025.
In November 2015, the FASB issued ASU 2015-17. The update changes how deferred taxes are classified on the balance sheet, eliminating the existing requirement for organizations to present deferred tax liabilities and assets as current and noncurrent in a classified balance sheet. Instead, organizations will be required to classify all deferred tax assets and liabilities as noncurrent. The ASU is effective for fiscal years and interim periods within
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those years beginning after December 15, 2016. As permitted by ASU 2015-17, we elected to early adopt this guidance effective December 31, 2015, using the retrospective adoption. The impact of the retrospective adoption of this standard was not material to our consolidated financial statements.
NOTE F — ACCRUED LIABILITIES
Accrued liabilities are detailed as follows:

|  | December 31,
|  | 2015 |  | 2014
|  | (In Thousands)
Compensation and employee benefits |  | $ | 27,276 |  |  | $ | 20,711 |
Accrued interest |  | 12,723 |  |  | 14,988 |
Accrued capital expenditures |  | 6,988 |  |  | 11,280 |
Other accrued liabilities |  | 33,983 |  |  | 38,721 |
Total accrued liabilities |  | $ | 80,970 |  |  | $ | 85,700 |

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NOTE G – LONG-TERM DEBT AND OTHER BORROWINGS
Our consolidated capital structure changed significantly during 2014 as a result of the CSI Acquisition. Because of the increased level of consolidated debt, it is important to consider TETRA's capital structure and CCLP's capital structure separately, as we have no cross default provisions, cross collateralization provisions, or cross guarantees with CCLP's debt, nor does CCLP with our debt. CCLP is not a restricted subsidiary or guarantor under any of our debt or credit agreements.
Long-term debt consists of the following:

|  |  | December 31, 2015 |  | December 31, 2014
|  |  | (In Thousands)
TETRA |  | Scheduled Maturity |  |  |
Bank revolving line of credit facility |  | September 30, 2019 | $ | 22,850 |  |  | $ | 90,000 |
5.90% Senior Notes, Series 2006-A |  | April 30, 2016 | — |  |  | 90,000 |
6.56% Senior Notes, Series 2008-B |  | April 30, 2015 | — |  |  | 90,000 |
5.09% Senior Notes, Series 2010-A |  | December 15, 2017 | 46,944 |  |  | 65,000 |
5.67% Senior Notes, Series 2010-B |  | December 15, 2020 | 18,056 |  |  | 25,000 |
4.00% Senior Notes, Series 2013 |  | April 29, 2020 | 35,000 |  |  | 35,000 |
11.00% Senior Notes, Series 2015 (presented net of the unamortized discount of $4.9 million as of December 31, 2015) |  | November 5, 2022 | 120,071 |  |  | — |
Senior Secured Notes |  | April 1, 2019 | 50,000 |  |  | — |
European bank credit facility |  |  | — |  |  | — |
Other |  |  | 50 |  |  | 74 |
TETRA total debt |  |  | 292,971 |  |  | 395,074 |
Less current portion |  |  | (50 | ) |  | (90,074 | )
TETRA total long-term debt |  |  | $ | 292,921 |  |  | $ | 305,000 |
CCLP |  |  |  |  | — |
CCLP Bank Credit Facility |  | August 4, 2019 | 235,000 |  |  | 195,000 |
CCLP 7.25% Senior Notes (presented net of the unamortized discount of $4.5 million as of December 31, 2015 and $5.0 million as of December 31, 2014) |  | August 15, 2022 | 345,481 |  |  | 344,961 |
CCLP total debt |  |  | 580,481 |  |  | 539,961 |
Less current portion |  |  | — |  |  | — |
CCLP total long-term debt |  |  | 580,481 |  |  | 539,961 |
Consolidated total long-term debt |  |  | $ | 873,402 |  |  | $ | 844,961 |

Scheduled maturities for the next five years and thereafter are as follows:

|  | December 31, 2015
|  | (In Thousands)
|  | TETRA |  | CCLP |  | Consolidated
2016 |  | $ | — |  |  | $ | — |  |  | $ | — |
2017 |  | 46,944 |  |  | — |  |  | 46,944 |
2018 |  | — |  |  | — |  |  | — |
2019 |  | 72,850 |  |  | 235,000 |  |  | 307,850 |
2020 |  | 53,056 |  |  | — |  |  | 53,056 |
Thereafter |  | 120,071 |  |  | 345,481 |  |  | 465,552 |
Total maturities |  | $ | 292,921 |  |  | $ | 580,481 |  |  | $ | 873,402 |

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Our Long-Term Debt
We are in compliance with all covenants and conditions under our long-term debt agreements as of December 31, 2015. Our continuing ability to comply with these financial covenants depends largely upon our ability to generate adequate cash flow. Historically, our financial performance has been more than adequate to meet these covenants. Due to the decreased demand for certain of our products and services by our customers in response to decreased oil and natural gas prices, we have taken strategic cost reduction efforts, including headcount reductions, deferral of wage increases, wage reductions, and other efforts to reduce costs and generate cash to mitigate the reduced demand for our products and services. In addition, certain of our businesses have seen increased activity and profitability levels, despite current oil and natural gas prices. Based on our projections for each of the quarterly periods in 2016 and including the impact of these cost reduction efforts and expected activity levels on future estimated operating cash flows, we anticipate that we will have sufficient liquidity to maintain compliance with the financial covenants under our long-term debt agreements through December 31, 2016.
Our Bank Credit Facility
On September 30, 2014, we entered into an amendment (the "Third Amendment") of our bank credit facility (the "Credit Agreement"). The Third Amendment amended our credit facility, which was scheduled to expire on October 29, 2015, by extending the maturity date of the credit facility until September 30, 2019 and decreasing the revolving commitment from $278 million to $225 million. The Third Amendment also revised certain financial covenants and the range of applicable interest rate spreads. The facility remains unsecured and guaranteed by certain of our material domestic subsidiaries. In connection with the reduction of the commitment capacity as part of the Third Amendment, we charged approximately $0.1 million of unamortized deferred financing costs to expense. As of December 31, 2015 we had a balance of approximately $22.9 million outstanding on the amended revolving credit facility, as well as $7.6 million in letters of credit and guarantees against the $225 million availability under the amended revolving credit facility, leaving a net availability of approximately $194.6 million.
Under the Credit Agreement, the revolving credit facility is unsecured and guaranteed by certain of our material U.S. subsidiaries (excluding CCLP and its subsidiaries). Borrowings generally bear interest at the British Bankers Association LIBOR rate plus 1.50% to 2.75%, depending on one of our financial ratios. The weighted average interest rate on borrowings outstanding under the Credit Agreement as of December 31, 2015, was 3.5% per annum. We pay a commitment fee ranging from 0.225% to 0.500% on unused portions of the facility. The Credit Agreement contains customary covenants and other restrictions, including certain financial ratio covenants based on our levels of debt and interest cost compared to a defined measure of our operating cash flows over a twelve month period. In addition, the Credit Agreement includes limitations on aggregate asset sales, individual acquisitions, and aggregate annual acquisitions and capital expenditures. Access to our revolving credit line is dependent upon our compliance with the financial ratio covenants set forth in the Credit Agreement. These financial ratios include a minimum interest charge coverage ratio (ratio of a defined measure of earnings to interest) of 3.0 and a maximum leverage ratio (ratio of debt and letters of credit outstanding to a defined measure of earnings) of 3.25. The maximum leverage ratio decreases to 3.0 as of March 31, 2016. Consolidated net earnings under the credit facility is defined as the aggregate of our net income (or loss) and our consolidated restricted subsidiaries (which does not include CCLP), including cash dividends and distributions (not the return of capital) received from persons other than consolidated restricted subsidiaries (including CCLP) and after allowances for taxes for such period determined on a consolidated basis in accordance with U.S. generally accepted accounting principles ("GAAP"), excluding certain items more specifically described therein. At December 31, 2015, our leverage ratio was 1.86 to 1. Deterioration of these financial ratios could result in a default by us under the Credit Agreement and, if not remedied, could result in termination of the Credit Agreement and acceleration of any outstanding balances. CCLP is an unrestricted subsidiary and is not a borrower or a guarantor under our Credit Agreement.
The Credit Agreement includes cross-default provisions relating to any other indebtedness (excluding indebtedness of CCLP) greater than a defined amount. Our Credit Agreement also contains a covenant that restricts us from paying dividends in the event of a default or if such payment would result in an event of default.
Our Senior Unsecured Notes
On November 20, 2015, pursuant to the 2015 Senior Note Purchase Agreement with GSO Tetra Holdings LP, an unrelated third party, we issued and sold $125.0 million in aggregate principal amount of our Series 2015 Senior Notes. Immediately after the closing and funding, we applied a portion of the $119.7 million proceeds from
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the sale of the Series 2015 Senior Notes (consisting of $125.0 million aggregate principal amount net of a $5.0 million discount and certain financing costs) to repay all of the indebtedness for borrowed money outstanding under our Credit Agreement. In December 2015, we applied the remaining portion of the proceeds, together with other funds to (i) pay the $25.0 million purchase price for 2010 Senior Notes accepted for purchase pursuant to the Tender Offer, (ii) prepay in full all amounts owed in respect of the outstanding Series 2006-A Senior Notes due April 30, 2016, and (iii) pay other fees and expenses associated with the transactions contemplated under the 2015 Senior Note Purchase Agreement.
The Series 2015 Senior Notes bear interest at the fixed rate of 11.0% and mature on November 5, 2022. Interest on the Series 2015 Senior Notes is due quarterly on March 15, June 15, September 15, and December 15 of each year, commencing on March 15, 2016. We may prepay the Series 2015 Senior Notes, in whole or in part at a prepayment price equal to (i) prior to November 20, 2018, 100% of the principal amount so prepaid, plus accrued and unpaid interest and a “make-whole” prepayment amount, (ii) during the period commencing on November 20, 2018, and ending on November 19, 2019, 104% of the principal amount so prepaid, plus accrued and unpaid interest, (iii) during the period commencing on November 20, 2019 and ending on November 19, 2020, 102% of the principal amount so prepaid, plus accrued and unpaid interest, (iv) during the period commencing on November 20, 2020, and ending on November 19, 2021, 101% of the principal amount so prepaid, plus accrued and unpaid interest, and (v) on or after November 20, 2021, 100% of the principal amount so prepaid, plus accrued and unpaid interest.
Each of our Senior Notes (the "Senior Unsecured Notes") was sold in the United States to accredited investors pursuant to an exemption from the Securities Act of 1933. The Senior Unsecured Notes are unsecured and are guaranteed by substantially all of our wholly owned U.S. subsidiaries. The 2015 Senior Note Purchase Agreement and the Note Purchase Agreements (together, "the Senior Unsecured Note Purchase Agreements"), contain customary covenants that limit our ability and the ability of certain of our restricted subsidiaries to, among other things: incur or guarantee additional indebtedness; incur or create liens; merge or consolidate or sell substantially all of our assets; engage in a different business; enter into transactions with affiliates; and make certain payments. In addition, the Senior Unsecured Note Purchase Agreements require us to maintain certain financial ratios, including a maximum leverage ratio (ratio of debt and letters of credit outstanding to a defined measure of earnings) of 3.5. Consolidated net earnings under the Senior Unsecured Note Purchase Agreements is the aggregate of our net income (or loss) and our consolidated restricted subsidiaries, including cash dividends and distributions (not the return of capital) received from persons other than consolidated restricted subsidiaries (such as CCLP) and after allowances for taxes for such period determined on a consolidated basis in accordance with GAAP, excluding certain items more specifically described therein. Under these Senior Unsecured Note Purchase Agreements, the financial ratio requirements include a minimum interest coverage ratio of 2.5 and a maximum leverage ratio of 3.5. At December 31, 2015, our leverage ratio was 1.86 to 1.
The maximum leverage ratio is further defined in our Senior Unsecured Note Purchase Agreements. Deterioration of the financial ratios could result in a default by us under the Senior Unsecured Note Purchase Agreements and, if not remedied, could result in termination of the Senior Unsecured Note Purchase Agreements and acceleration of any outstanding balances. CCLP is an unrestricted subsidiary and is not a borrower or a guarantor under our Senior Unsecured Note Purchase Agreements.
The Senior Unsecured Note Purchase Agreements contain the following cross-default provisions. If we or any of our restricted subsidiaries (i) fails to make any payment when due beyond any applicable grace period under any indebtedness of at least $20.0 million, (ii) defaults in the performance of or compliance with any term of any indebtedness in an aggregate outstanding principal amount of at least $20.0 million or of any mortgage, indenture or other agreement relating to such indebtedness or any other condition exists, and as a result of such default or condition such indebtedness is accelerated and declared due and payable before its stated maturity or before its regularly scheduled dates for payment, or (iii) become obligated to purchase or repay indebtedness before its regular maturity or before its regularly scheduled dates of payment in an aggregate outstanding principal amount of at least $20.0 million or one or more persons have the right to require us or any of our subsidiaries to purchase or repay such indebtedness. Upon the occurrence and during the continuation of an event of default under the Senior Unsecured Note Purchase Agreements, the Senior Unsecured Notes may become immediately due and payable, either automatically or by declaration of holders of more than 50% in principal amount of the Senior Unsecured Notes at the time outstanding. We are in compliance with all covenants and conditions of the Senior Unsecured Note Purchase Agreements as of December 31, 2015.
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In April 2015, we utilized the proceeds from the issuance of the Senior Secured Notes (see discussion below) along with borrowings under our Credit Agreement to repay the 2008-B Senior Notes. In December 2015, we prepaid in full all amounts owed in respect of the outstanding Series 2006-A Senior Notes, due April 30, 2016, including a $1.6 million "make-whole" prepayment premium in accordance with the Master Note Purchase Agreement.
In December 2015, and pursuant to a Tender Offer that commenced on November 5, 2015, we purchased for cash $25.0 million aggregate principal amount of certain of the outstanding 2010 Senior Notes, consisting of $18.1 million of the Series 2010-A Senior Notes and $6.9 million of the Series 2010-B Senior Notes. The offered consideration for 2010 Senior Notes was an amount of cash equal to $100,000 per $100,000 principal amount of 2010 Senior Notes tendered prior to December 7, 2015, and accepted for purchase by us, plus accrued and unpaid interest.
Our Senior Secured Notes
On April 30, 2015, and pursuant to a Note Purchase Agreement dated March 18, 2015, with Wells Fargo Energy Capital, Inc., in its capacity as noteholder representative for the noteholders (the "Noteholder Representative"), and Wells Fargo Energy Capital, Inc., in its capacity as the sole initial purchaser (the "Senior Secured Note Purchase Agreement"), we issued and sold $50.0 million aggregate principal amount of Senior Secured Notes due April 1, 2017 (the "Senior Secured Notes"). In February 2016, we repaid $10.0 million of the amount outstanding under the Senior Secured Notes. The Senior Secured Notes were sold in a private placement exempt from the registration requirements of the Securities Act of 1933, as amended (the "Securities Act"). The proceeds from these Senior Secured Notes were used to provide a portion of the funds necessary to repay the $90.0 million principal amount of the Series 2008-B Senior Notes that matured on April 30, 2015. The Senior Secured Notes are secured by our accounts receivable (excluding CCLP's accounts receivable) and our common units in CCLP, and the related Note Purchase Agreement includes financial covenants consistent with those applicable to our existing bank revolving credit facility.
On November 5, 2015, we entered into the Second Amendment (the “Second Amendment”) to the Note Purchase Agreement that, conditioned upon the closing and funding of the issuance of the Series 2015 Senior Notes, (i) provided for the extension of the maturity date of the Senior Secured Notes from April 1, 2017 to April 1, 2019, (ii) amended certain definitions in the Note Purchase Agreement and (iii) required us to pay an extension fee .
The principal portion of each of the Senior Secured Notes consists of tranches that bear interest at LIBOR, as defined in the Note Purchase Agreement, plus an applicable margin ("LIBOR Tranches") and tranches that bear interest at the Base Rate plus an applicable margin ("Base Rate Tranches"), as we may request in accordance with the Note Purchase Agreement. The initial Senior Secured Notes consist of a LIBOR Tranche and the interest rate at closing and as of December 31, 2015, is 5.75% per annum. We may convert the LIBOR Tranche into a Base Rate Tranche in accordance with the Note Purchase Agreement. The Note Purchase Agreement contains customary covenants and default and cross default provisions consistent with the agreements governing our other TETRA indebtedness.
CCLP Long-Term Debt
CCLP Bank Credit Facility
On August 4, 2014, in connection with the CSI Acquisition, CCLP entered into a credit agreement (the "CCLP Credit Agreement"), and it borrowed $210.0 million, which was used to fund, in part, CCLP's $825.0 million CSI Acquisition purchase price. In addition, the CCLP Credit Agreement borrowings were used to pay fees and expenses related to the CSI Acquisition, the CCLP Senior Notes offering, and the CCLP Credit Agreement, and to repay the $38.1 million balance outstanding under CCLP's previous revolving credit facility dated October 15, 2013, (the "Previous CCLP Credit Agreement"), which was then terminated. As a result, approximately $0.8 million of unamortized deferred financing costs associated with that terminated Previous CCLP Credit Agreement was charged to earnings and reflected in other expense during 2014.
Under the CCLP Credit Agreement, CCLP and CSI Compressco Sub Inc. are named as the borrowers, and all obligations under the CCLP Credit Agreement are guaranteed by all of CCLP's existing and future, direct and indirect, domestic restricted subsidiaries (other than domestic subsidiaries that are wholly owned by foreign subsidiaries). We are not a borrower or a guarantor under the CCLP Credit Agreement. The CCLP Credit
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Agreement includes a maximum credit commitment of $400.0 million and included within such amount is availability for letters of credit (with a sublimit of $20.0 million) and swingline loans (with a sublimit of $60.0 million). The amount of borrowings under the CCLP Credit Agreement is subject to certain limitations, including borrowing limitations as a result of financial covenants. During the year ended December 31, 2014, CCLP incurred financing costs of approximately $7.3 million related to the CCLP Credit Agreement. These costs are included in Other Assets and are being amortized over the term of the CCLP Credit Agreement. As of December 31, 2015, CCLP had a balance outstanding of $235.0 million, had approximately $1.6 million letters of credit and performance bonds, and had availability under the CCLP Credit Agreement of approximately $163.4 million.
The CCLP Credit Agreement is available to provide CCLP's working capital needs, letters of credit, and for general partnership purposes, including capital expenditures and potential future expansions or acquisitions. So long as CCLP is not in default, the CCLP Credit Agreement can also be used to fund CCLP’s quarterly distributions at the option of the board of directors of CCLP's general partner (provided, that after giving effect to such distributions, the borrowers will be in compliance with the financial covenants).
All obligations under the CCLP Credit Agreement and the guarantees of those obligations are secured, subject to certain exceptions, by a first lien security interest in substantially all of CCLP's assets and the assets of its existing and future domestic subsidiaries, and all of the capital stock of its existing and future subsidiaries (limited in the case of foreign subsidiaries, to 65% of the voting stock of first tier foreign subsidiaries). Borrowings under the CCLP Credit Agreement bear interest at a rate per annum equal to, at CCLP's option, either (a) LIBOR (adjusted to reflect any required bank reserves) for an interest period equal to one, two, three, or six months (as selected by CCLP), plus a leverage-based margin or (b) a base rate plus a leverage-based margin; such base rate shall be determined by reference to the highest of (1) the prime rate of interest per annum announced from time to time by Bank of America, N.A., (2) the Federal Funds rate plus 0.50% per annum, and (3) LIBOR (adjusted to reflect any required bank reserves) for a one month interest period on such day plus 1.00% per annum. LIBOR based loans will have an applicable margin that will range between 1.75% and 2.50% per annum and base rate loans will have an applicable margin that will range between 0.75% and 1.50% per annum, each based on CCLP's consolidated total leverage ratio when financial statements are delivered. The weighted average interest rate on borrowings outstanding under the CCLP Credit Agreement as of December 31, 2015, was 3.50% per annum. In addition to paying interest on outstanding principal under the CCLP Credit Agreement, CCLP is required to pay a commitment fee in respect of the unutilized commitments of from 0.375% to 0.50% per annum, paid quarterly in arrears, based on CCLP's consolidated total leverage ratio. CCLP is also required to pay a customary letter of credit fee equal to the applicable margin on revolving credit LIBOR loans, fronting fees, and other fees, agreed to with the administrative agent and lenders.
The CCLP Credit Agreement requires CCLP to maintain (i) a minimum consolidated interest coverage ratio (ratio of consolidated earnings before interest, taxes, depreciation, and amortization ("EBITDA") to consolidated interest charges) of 3.0 to 1.0, (ii) a maximum consolidated total leverage ratio (ratio of consolidated total indebtedness to consolidated EBITDA) of 5.5 to 1.0 (with step downs to 5.0 to 1.0), and (iii) a maximum consolidated secured leverage ratio (consolidated secured indebtedness to consolidated EBITDA) of 4.0 to 1.0, in each case, as of the last day of each fiscal quarter, calculated on a trailing four quarters basis. At December 31, 2015, CCLP's leverage ratio was 4.56 to 1. In addition, the CCLP Credit Agreement includes customary negative covenants that, among other things, limit CCLP's ability to incur additional debt, incur or permit certain liens to exist, or make certain loans, investments, acquisitions, or other restricted payments. The CCLP Credit Agreement provides that CCLP can make distributions to holders of its common units, but only if there is no default or event of default under the facility.
CCLP is in compliance with all covenants and conditions of its Credit Agreement as of December 31, 2015. CCLP's continuing ability to comply with its financial covenants depends largely upon its ability to generate adequate cash flow. Historically, CCLP's financial performance has been more than adequate to meet these covenants, and CCLP expects this trend to continue. However, given the expected decreased demand for certain of CCLP's products and services by its customers in response to decreased oil and natural gas prices, CCLP has taken strategic cost reduction efforts, including headcount reductions, deferral of wage increases, wage reductions, and other efforts to reduce costs and generate cash in anticipation of the reduced demand for its products and services. Based on CCLP's projections for each of the quarterly periods in 2016 and including the impact of these cost reduction efforts to increase operating cash flows, CCLP anticipates that it will be in compliance with the financial covenants under its Credit Agreement through December 31, 2016.
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CCLP 7.25% Senior Notes
In August 2014, CCLP, and CSI Compressco Finance Inc., a Delaware corporation and indirect wholly owned subsidiary of CCLP (CSI Compressco Finance and, together with CCLP, the "Issuers"), issued $350.0 million aggregate principal amount of the Issuers’ 7.25% Senior Notes due 2022 (the "CCLP Senior Notes") in a private offering (the "Offering") exempt from the registration requirements under the Securities Act of 1933, as amended (the "Securities Act") pursuant to a Note Purchase Agreement dated July 29, 2014. The CCLP Senior Notes were subsequently registered through a public exchange offer that closed on July 20, 2015.
The obligations under the CCLP Senior Notes are jointly and severally, and fully and unconditionally, guaranteed on a senior unsecured basis by each of CCLP’s domestic restricted subsidiaries (other than CSI Compressco Finance) that guarantee CCLP’s other indebtedness (the "Guarantors" and together with the Issuers, the "Obligors"). The CCLP Senior Notes and the subsidiary guarantees thereof (together, the "CCLP Securities") were issued pursuant to an indenture described below.
The Obligors issued the CCLP Securities pursuant to the Indenture dated as of August 4, 2014, (the "Indenture") by and among the Obligors and U.S. Bank National Association, as trustee (the "Trustee"). The CCLP Senior Notes accrue interest at a rate of 7.25% per annum. Interest on the CCLP Senior Notes is payable semi-annually in arrears on February 15 and August 15 of each year, beginning February 15, 2015. The CCLP Senior Notes are scheduled to mature on August 15, 2022.
The Indenture contains customary covenants restricting CCLP’s ability and the ability of its restricted subsidiaries to: (i) pay dividends and make certain distributions, investments and other restricted payments; (ii) incur additional indebtedness or issue certain preferred shares; (iii) create certain liens; (iv) sell assets; (v) merge, consolidate, sell or otherwise dispose of all or substantially all of its assets; (vi) enter into transactions with affiliates; and (vii) designate its subsidiaries as unrestricted subsidiaries under the Indenture. The Indenture also contains customary events of default and acceleration provisions relating to such events of default, which provide that upon an event of default under the Indenture, the Trustee or the holders of at least 25% in aggregate principal amount of the CCLP Senior Notes then outstanding may declare all amounts owing under the CCLP Senior Notes to be due and payable.
NOTE H – DECOMMISSIONING AND OTHER ASSET RETIREMENT OBLIGATIONS
The large majority of our asset retirement obligations consists of the remaining future well abandonment and decommissioning costs for offshore oil and gas properties and platforms owned by our Maritech subsidiary, including the decommissioning and debris removal costs associated with its remaining offshore platforms previously destroyed by hurricanes. The amount of decommissioning liabilities recorded by Maritech is reduced by amounts allocable to joint interest owners in these properties and platforms. We also operate facilities in various U.S. and foreign locations that are used in the manufacture, storage, and sale of our products, inventories, and equipment. These facilities are a combination of owned and leased assets.
The values of our asset retirement obligations for non-Maritech properties were approximately $9.1 million and $8.4 million as of December 31, 2015 and 2014, respectively. We are required to take certain actions in connection with the retirement of these assets. We have reviewed our obligations in this regard in detail and estimated the cost of these actions. The original estimates are the fair values that have been recorded for retiring these long-lived assets. The associated asset retirement costs are capitalized as part of the carrying amount of these long-lived assets. The costs for non-oil and gas assets are depreciated on a straight-line basis over the lives of those assets.
The changes in the values of our asset retirement obligations during the most recent two year period are as follows:
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|  | Year Ended December 31,
|  | 2015 |  | 2014
|  | (In Thousands)
Beginning balance for the period, as reported |  | $ | 62,741 |  |  | $ | 50,904 |
Activity in the period: |  |  |  |  |  |
Accretion of liability |  | 2,000 |  |  | 728 |
Retirement obligations incurred |  | — |  |  | 39,187 |
Revisions in estimated cash flows |  | 3,341 |  |  | 35,241 |
Settlement of retirement obligations |  | (10,633 | ) |  | (63,319 | )
Ending balance |  | $ | 57,449 |  |  | $ | 62,741 |

We review the adequacy of our decommissioning liabilities whenever indicators suggest that the estimated cash flows underlying the liabilities have changed. For our Maritech segment, the timing and amounts of these cash flows are subject to changes in the oil and gas industry environment and other factors and may result in additional liabilities to be recorded. We increased the estimated cash flows to decommission these properties by approximately $3.3 million in 2015 and approximately $2.7 million of this amount was charged to cost of product sales during the period. Revisions in estimated cash flows during 2014 resulted in increases of approximately $35.2 million, and this amount was charged to expense during the period.
Asset retirement obligations are recorded in accordance with FASB ASC 410, whereby the estimated fair value of a liability for asset retirement obligations is recorded in the period in which it is incurred and in which a reasonable estimate can be made. Such estimates are based on relevant assumptions that we believe are reasonable. The cost estimates for Maritech asset retirement obligations are considered reasonable estimates consistent with current market conditions, and we believe reflect the amount of work legally obligated to be performed in accordance with Bureau of Safety and Environmental Enforcement (BSEE) standards, as revised from time to time.
The amount of work performed or estimated to be performed on a Maritech property asset retirement obligation may often exceed amounts previously estimated for numerous reasons. Property conditions encountered, including subsea, geological, or downhole conditions, may be different from those anticipated at the time of estimation due to the age of the property and the quality of information available about the particular property conditions. Maritech’s remaining oil and gas properties and production platforms were drilled and constructed by other operators many years ago, and frequently there is not a great deal of detailed documentation on which to base the estimated asset retirement obligation for these properties. Appropriate underwater surveys are performed to determine the condition of such properties as part of our due diligence in estimating the costs, but not all conditions have been able to be determined prior to the commencement of the actual work.
Maritech has one remaining property that was damaged by hurricanes in the past, leaving the production platform toppled on the seabed and production tubing from the wells (which may be under high pressure) bent under the water. While the basic procedures involved in the plugging and abandonment of wells and decommissioning of platforms and pipelines and removal of debris is generally similar for these properties, the cost of performing work at these damaged locations is particularly difficult to estimate due to the unique conditions encountered, including the uncertainty regarding the extent of physical damage to many of the structures. Maritech has this one remaining toppled platform included as part of its asset retirement obligation as of December 31, 2015. Our estimate of remaining hurricane related decommissioning costs is approximately $7.8 million and has been accrued as part of Maritech’s decommissioning liabilities. During the performance of asset retirement activities, unforeseen weather or other conditions may extend the duration and increase the cost of the projects, which are normally not done on a fixed price basis, thereby resulting in costs in excess of the original estimate.
In addition, Maritech has encountered situations where previously plugged and abandoned wells on its properties have later exhibited a buildup of pressure, which is evidenced by gas bubbles coming from the plugged well head. We refer to this situation as “wells under pressure” and this can either be discovered when performing additional work at the property or by notification from a third party. Wells under pressure require Maritech to return to the site to perform additional plug and abandonment procedures that were not originally anticipated and included in the estimate of the asset retirement obligation for such property. Remediation work at previously abandoned well sites is particularly costly, due to the lack of a platform from which to base these activities. During 2014, Maritech
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added new decommissioning liabilities for remediation work required on projects previously thought to be completed of approximately $39.2 million for work performed during the year or related to the estimated cost of future work to be performed. This additional amount was directly charged to earnings as an operating expense during these years. Maritech is the last operator of record for its plugged wells, and bears the risk of additional future work required as a result of wells becoming pressurized in the future.
These increased estimates are included in the revisions in estimated cash flows in the table above. A portion of the excess decommissioning costs recorded during 2015 and 2014 was associated with properties not operated by Maritech and also include additional work incurred and anticipated to be required, including remediation work required on certain wells that had been previously plugged.
For oil and gas properties previously operated by Maritech, the purchaser of the properties generally became the successor operator and assumed the financial responsibilities associated with the properties’ operations and abandonment and decommissioning. However, to the extent that purchasers of these oil and gas properties fail to perform the abandonment and decommissioning work required and there is insufficient bonding or other security, the previous owners and operators of the properties, including Maritech, may be required to assume responsibility for the abandonment and decommissioning obligations.
NOTE I – COMMITMENTS AND CONTINGENCIES
Litigation
We are named defendants in several lawsuits and respondents in certain governmental proceedings arising in the ordinary course of business. While the outcome of lawsuits or other proceedings against us cannot be predicted with certainty, management does not consider it reasonably possible that a loss resulting from such lawsuits or other proceedings in excess of any amounts accrued has been incurred that is expected to have a material adverse impact on our financial condition, results of operations, or liquidity.
Environmental
One of our subsidiaries, TETRA Micronutrients, Inc. (TMI), previously owned and operated a production facility located in Fairbury, Nebraska. TMI is subject to an Administrative Order on Consent issued to American Microtrace, Inc. (n/k/a/ TETRA Micronutrients, Inc.) in the proceeding styled In the Matter of American Microtrace Corporation, EPA I.D. No. NED00610550, Respondent, Docket No. VII-98-H-0016, dated September 25, 1998 (the "Consent Order"), with regard to the Fairbury facility. TMI is liable for ongoing environmental monitoring at the Fairbury facility under the Consent Order; however, the current owner of the Fairbury facility is responsible for costs associated with the closure of that facility. While the outcome cannot be predicted with certainty, management does not consider it reasonably possible that a loss in excess of any amounts accrued has been incurred or is expected to have a material adverse impact on our financial condition, results of operations, or liquidity.
Product Purchase Obligations
In the normal course of our Fluids Division operations, we enter into supply agreements with certain manufacturers of various raw materials and finished products. Some of these agreements have terms and conditions that specify a minimum or maximum level of purchases over the term of the agreement. Other agreements require us to purchase the entire output of the raw material or finished product produced by the manufacturer. Our purchase obligations under these agreements apply only with regard to raw materials and finished products that meet specifications set forth in the agreements. We recognize a liability for the purchase of such products at the time we receive them. As of December 31, 2015, the aggregate amount of the fixed and determinable portion of the purchase obligation pursuant to our Fluids Division’s supply agreements was approximately $135.1 million, including $12.3 million during 2016, $11.2 million during 2017, $9.3 million during 2018, $9.3 million during 2019, $9.3 million during 2020, and $83.7 million thereafter, extending through 2029. Amounts purchased under these agreements for each of the years ended December 31, 2015, 2014, and 2013, was $22.0 million, $21.6 million, and $21.3 million, respectively.
Other Contingencies
During 2011, in connection with the sale of a significant majority of Maritech's oil and gas producing properties, the buyers of the properties assumed the associated decommissioning liabilities pursuant to the
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purchase and sale agreements. For those oil and gas properties Maritech previously operated, the buyers of the properties assumed the financial responsibilities associated with the properties' operations, including abandonment and decommissioning, and generally became the successor operator. Some buyers of these Maritech properties subsequently sold certain of these properties to other buyers who also assumed these financial responsibilities associated with the properties' operations, and these buyers also typically became the successor operator of the properties. To the extent that a buyer of these properties fails to perform the abandonment and decommissioning work required, the previous owner, including Maritech, may be required to perform the abandonment and decommissioning obligation. A significant portion of the decommissioning liabilities that were assumed by the buyers of the Maritech properties in 2011 remains unperformed, and we believe the amounts of these remaining liabilities are significant. We monitor the financial condition of the buyers of these properties from Maritech, and if current oil and natural gas pricing levels continue, we expect that one or more of these buyers may be unable to perform the decommissioning work required on the properties acquired from Maritech.
During 2015, continued low oil and natural gas prices have resulted in reduced revenues and cash flows for all oil and gas producing companies, including those companies that bought Maritech properties in the past. Certain of these oil and gas producing companies that bought Maritech properties are currently experiencing severe financial difficulties. With regard to certain of these properties, Maritech has security in the form of bonds or cash escrows intended to secure the buyers' obligations to perform the decommissioning work. One company that bought, and subsequently sold, Maritech properties filed for Chapter 11 bankruptcy protection in August 2015. Maritech and its legal counsel monitor the status of these companies. As of December 31, 2015, we do not consider the likelihood of Maritech becoming liable for decommissioning liabilities on sold properties to be probable.
Maritech has encountered situations where previously plugged and abandoned wells on its properties have later exhibited a buildup of pressure, which is evidenced by gas bubbles coming from the plugged well head. We refer to this situation as “wells under pressure” and this can either be discovered when performing additional work at the property or by notification from a third party. Wells under pressure require Maritech to return to the site to perform additional plug and abandonment procedures that were not originally anticipated and included in the estimate of the asset retirement obligation for such property. Remediation work at previously abandoned well sites is particularly costly, due to the lack of a platform from which to base these activities. Maritech is the last operator of record for its plugged wells, and bears the risk of additional future work required as a result of wells becoming pressurized in the future.
NOTE J — CAPITAL STOCK
Our Restated Certificate of Incorporation authorizes us to issue 100,000,000 shares of common stock, par value $.01 per share, and 5,000,000 shares of preferred stock, par value $.01 per share. As of December 31, 2015, we had 80,256,670 shares of common stock outstanding, with 2,766,958 shares held in treasury, and no shares of preferred stock outstanding. The voting, dividend, and liquidation rights of the holders of common stock are subject to the rights of the holders of preferred stock. The holders of common stock are entitled to one vote for each share held. There is no cumulative voting. Dividends may be declared and paid on common stock as determined by our Board of Directors, subject to any preferential dividend rights of any then outstanding preferred stock. A summary of the activity of our common shares outstanding and treasury shares held for the three year period ending December 31, 2015, is as follows:

Common Shares Outstanding |  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
At beginning of period |  | 79,649,946 |  |  | 78,855,547 |  |  | 78,112,032 |
Exercise of common stock options, net |  | 67,808 |  |  | 290,369 |  |  | 373,106 |
Grants of restricted stock, net |  | 538,916 |  |  | 504,030 |  |  | 370,409 |
At end of period |  | 80,256,670 |  |  | 79,649,946 |  |  | 78,855,547 |

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Treasury Shares Held |  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
At beginning of period |  | 2,672,930 |  |  | 2,478,084 |  |  | 2,334,137 |
Shares received upon exercise of common stock options |  | 36,818 |  |  | 189,469 |  |  | 119,477 |
Shares received upon vesting of restricted stock, net |  | 57,210 |  |  | 5,377 |  |  | 24,470 |
At end of period |  | 2,766,958 |  |  | 2,672,930 |  |  | 2,478,084 |

Our Board of Directors is empowered, without approval of the stockholders, to cause shares of preferred stock to be issued in one or more series and to establish the number of shares to be included in each such series and the rights, powers, preferences, and limitations of each series. Because the Board of Directors has the power to establish the preferences and rights of each series, it may afford the holders of any series of preferred stock preferences, powers and rights, voting or otherwise, senior to the rights of holders of common stock. The issuance of the preferred stock could have the effect of delaying or preventing a change in control of the Company.
Upon our dissolution or liquidation, whether voluntary or involuntary, holders of our common stock will be entitled to receive all of our assets available for distribution to our stockholders, subject to any preferential rights of any then outstanding preferred stock.
In January 2004, our Board of Directors authorized the repurchase of up to $20.0 million of our common stock. During the three years ending December 31, 2015, we made no purchases of our common stock pursuant to this authorization.
NOTE K — EQUITY-BASED COMPENSATION
We have various equity incentive compensation plans which provide for the granting of restricted common stock, options for the purchase of our common stock, and other performance-based, equity-based compensation awards to our executive officers, key employees, nonexecutive officers, consultants, and directors. Stock options are exercisable for periods of up to ten years. Compensation cost for all share-based payments is based on the grant date fair value and is recognized in earnings over the requisite service period. Total equity-based compensation expense, before tax, for the three years ended December 31, 2015, 2014, and 2013, was $16.9 million, $6.8 million, and $6.7 million, respectively, and is included in general and administrative expense. Total equity-based compensation expense, net of taxes, for the three years ended December 31, 2015, 2014, and 2013, was $13.9 million, $4.7 million, and $4.8 million, respectively. During 2015, we automated the computation of equity-based compensation expense, converting from a manual calculation of the overall impact of forfeitures and vesting on the amount of expense. As a result of this conversion, and performing a retroactive review of equity-based compensation expense for all periods from 2006 to 2015, we recorded a correcting pre-tax adjustment of $6.7 million during the fourth quarter of 2015. Management does not consider the impact of this cumulative adjustment to be material to any individual annual period.
Stock Incentive Plans
The TETRA Technologies, Inc. 1990 Stock Option Plan (the "1990 Plan") was initially adopted in 1985 and subsequently amended to change the name, the number, and the type of options that could be granted, as well as the time period for granting stock options. As of December 31, 2004, no further options may be granted under the 1990 Plan. We granted performance stock options under the 1990 Plan to certain executive officers. These granted options have an exercise price per share of not less than the market value at the date of issuance and are fully vested and exercisable.
During 1996, we adopted the 1996 Stock Option Plan for Nonexecutive Employees and Consultants (the "Nonqualified Plan") to enable us to award nonqualified stock options to nonexecutive employees and consultants who are key to our performance. As of May 2, 2006, no further options may be granted under the Nonqualified Plan.
In May 2006, our stockholders approved the adoption of the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan. Pursuant to the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan, we were authorized to grant up to 1,300,000 shares in the form of stock options (including incentive stock options and nonqualified stock options); restricted stock; bonus stock; stock appreciation rights; and performance awards to employees, consultants, and non-employee directors. As a result of the May 2006 adoption and approval
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of the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan, no further awards may be granted under our other previously existing plans. As of May 4, 2008, no further awards may be granted under the TETRA Technologies, Inc. 2006 Equity Incentive Compensation Plan.
In May 2007, our stockholders approved the adoption of the TETRA Technologies, Inc. 2007 Equity Incentive Compensation Plan. In May 2008, our stockholders approved the adoption of the TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan, which among other changes, resulted in an increase in the maximum number of shares authorized for issuance. In May 2010, our stockholders approved further amendments to the TETRA Technologies, Inc. Amended and Restated 2007 Equity Incentive Compensation Plan (renamed as the 2007 Long Term Incentive Compensation Plan) which, among other changes, resulted in an additional increase in the maximum number of shares authorized for issuance. Pursuant to the 2007 Long Term Incentive Compensation Plan, we are authorized to grant up to 5,590,000 shares in the form of stock options (including incentive stock options and nonqualified stock options); restricted stock; bonus stock; stock appreciation rights; and performance awards to employees, consultants, and non-employee directors.
In May 2011, our stockholders approved the adoption of the TETRA Technologies, Inc. 2011 Long Term Incentive Compensation Plan. Pursuant to this plan, we were authorized to grant up to 2,200,000 shares in the form of stock options, restricted stock, bonus stock, stock appreciation rights, and performance awards to employees, consultants, and non-employee directors. On May 3, 2013, shareholders approved the TETRA Technologies, Inc. 2011 Long Term Incentive Compensation Plan which, among other things, increased the number of authorized shares to 5,600,000.
In June 2011, the Compressco Partners, L.P. 2011 Long Term Incentive Plan ("CCLP Long Term Incentive Plan") was adopted by the board of directors of CCLP’s general partner. The CCLP Long Term Incentive Plan provides for grants of restricted units, phantom units, unit awards and other unit-based awards up to a plan maximum of 1,537,122 common units.
Grants of Equity Awards by CCLP
During each of the three years ended December 31, 2015, CCLP granted restricted unit, phantom unit, or performance phantom unit awards to certain employees, officers, and directors of its general partner or of our employees. Awards of restricted units and phantom units generally vest over a three year period. Awards of performance phantom units cliff vest at the end of a performance period and are settled based on achievement of related performance measures over the performance period. Phantom units are notional units that entitle the grantee to receive a common unit upon the vesting of the award. Each of the phantom unit and performance phantom unit awards includes distribution equivalent rights that enable the recipient to receive additional units equal in value to the accumulated cash distributions made on the units subject to the award from the date of grant. Accumulated distributions associated with each underlying unit are payable upon settlement of the related phantom unit award (and are forfeited if the related award is forfeited).
The following is a summary of CCLP’s equity award activity for the year ended December 31, 2015:

|  | Units |  | Weighted Average Grant Date Fair Value Per Unit
|  | (In Thousands) |  |
Nonvested units outstanding at December 31, 2014 |  | 263 |  |  | $ | 21.89 |
Units granted(1) |  | 261 |  |  | 21.39 |
Units cancelled |  | (50 | ) |  | 20.49 |
Units vested |  | (73 | ) |  | 22.24 |
Nonvested units outstanding at December 31, 2015 |  | 401 |  |  | $ | 21.77 |

(1) | The number of units granted shown above includes 161,254 performance-based phantom units, which represents the maximum number of common units that would be issued if the maximum level of performance under the awards is achieved. The number of units actually issued under the awards may range from zero to 161,254.

Stock Options
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The weighted average fair value of options granted during the years ended December 31, 2015, 2014, and 2013, was $3.17, $4.07, and $6.00, respectively, using the Black-Scholes option valuation model with the following weighted average assumptions:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Expected stock price volatility |  | 49% to 51% |  |  | 44% to 45% |  |  | 54% to 74% |
Expected life of options |  | 4.6 years |  |  | 4.9 years |  |  | 4.9 years |
Risk free interest rate |  | 1.41% to 1.51% |  |  | .01% |  |  | 0.76% to 1.48% |
Expected dividend yield |  | — |  |  | — |  |  | — |

The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the grant date for a period commensurate with the estimated expected life of the stock options. Expected volatility is based on the historical volatility of our stock over the period commensurate with the expected life of the stock options and other factors. The dividend yield is based on the current annualized dividend rate in effect during the quarter in which the grant was made. At the time of the stock option grants during each of the years ended December 31, 2015, 2014 and 2013, we had not historically paid any dividends and did not expect to pay any dividends during the expected life of the stock options.
The following is a summary of stock option activity for the year ended December 31, 2015:

|  | Shares Under Option |  | Weighted Average Option Price Per Share |  | Weighted-Average Remaining Contractual Life |  | Aggregate Intrinsic Value (in thousands)
|  | (In Thousands) |  |  |  |  |  |
Outstanding at January 1, 2015 |  | 4,196 |  |  | $ | 11.96 |  |  |  |  |
Options granted |  | 742 |  |  | 7.14 |  |  |  |  |
Options cancelled |  | (438 | ) |  | 13.42 |  |  |  |  |
Options exercised |  | (68 | ) |  | 4.27 |  |  |  |  |
Options expired |  | (265 | ) |  | $ | 9.42 |  |  |  |  |
Outstanding at December 31, 2015 |  | 4,167 |  |  | $ | 11.23 |  |  | 5.8 |  | $ | 2,813 |
Expected to vest at December 31, 2015 |  | 3,937 |  |  | $ | 11.29 |  |  | 5.7 |  | $ | 2,734 |
Exercisable at December 31, 2015 |  | 3,050 |  |  | $ | 12.39 |  |  | 4.6 |  | $ | 2,422 |

Intrinsic value is the difference between the market value of our stock option multiplied by the number of stock options outstanding for those stock options where the market value exceeds their exercise price. The total intrinsic value of stock options exercised during December 31, 2015, 2014, and 2013, was approximately $0.2 million, $1.4 million, and $2.2 million, respectively.
At December 31, 2015, total unrecognized compensation cost related to unvested stock options of
$2.7 million, is expected to be recognized over a weighted-average remaining service period of 1.82 years.
Restricted Stock
Restricted stock awards are periodically granted to key employees, including grants for employment inducements, as well as to members of our Board of Directors. Employee awards provide for vesting periods ranging from three to five years. Non-employee director grants vest in full before the first anniversary of the grant. Upon vesting of these grants, shares are issued to award recipients. The following is a summary of activity for our outstanding restricted stock awards for the year ended December 31, 2015:
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|  | Shares |  | Weighted Average Grant Date Fair Value Per Share
|  | (In Thousands) |  |
Nonvested restricted shares outstanding at December 31, 2014 |  | 773 |  |  | $ | 10.54 |
Granted |  | 633 |  |  | 7.15 |
Vested |  | (493 | ) |  | 9.72 |
Cancelled/Forfeited |  | (35 | ) |  | 10.75 |
Nonvested restricted shares outstanding at December 31, 2015 |  | 878 |  |  | $ | 8.54 |

Total compensation cost recognized for restricted stock awards was $5.4 million, $4.1 million, and $3.8 million for the years ended December 31, 2015, 2014, and 2013 respectively. Total unrecognized compensation cost at December 31, 2015, related to restricted stock awards is approximately $4.7 million which is expected to be recognized over a weighted-average remaining amortization period of 1.92 years. During the years ended December 31, 2015, 2014,and 2013, the total fair value of shares vested was $4.8 million, $4.3 million and $4.2 million, respectively.
During 2015, 2014, and 2013, we received 57,336, 56,071 and 40,163 shares, respectively, of our common stock related to the vesting of certain employee restricted stock. Such surrendered shares received by us are included in treasury stock. At December 31, 2015, net of options previously exercised pursuant to our various equity compensation plans, we have a maximum of 6,587,047 shares of common stock issuable pursuant to awards previously granted and outstanding and awards authorized to be granted in the future.
NOTE L — 401(k) PLAN
We have a 401(k) retirement plan (the "Plan") that covers substantially all employees and entitles them to contribute up to 70% of their annual compensation, subject to maximum limitations imposed by the Internal Revenue Code. We have historically matched 50% of each employee’s contribution up to 6% of annual compensation, subject to certain limitations as outlined in the Plan. In addition, we can make discretionary contributions which are allocable to participants in accordance with the Plan. Total expense related to our 401(k) plan was $4.2 million, $4.4 million, and $4.2 million in 2015, 2014, and 2013, respectively.
NOTE M — DEFERRED COMPENSATION PLAN
We provide our officers, directors, and certain key employees with the opportunity to participate in an unfunded, deferred compensation program. There were twenty-seven participants in the program at December 31, 2015. Under the program, participants may defer up to 100% of their yearly total cash compensation. The amounts deferred remain our sole property, and we use a portion of the proceeds to purchase life insurance policies on the lives of certain of the participants. The insurance policies, which also remain our sole property, are payable to us upon the death of the insured. We separately contract with the participant to pay to the participant the amount of deferred compensation, as adjusted for gains or losses, invested in participant-selected investment funds. Participants may elect to receive deferrals and earnings at termination, death, or at a specified future date while still employed. Distributions while employed must be at least three years after the deferral election. The program is not qualified under Section 401 of the Internal Revenue Code. At December 31, 2015, the amounts payable under the plan approximated the value of the corresponding assets we owned.
NOTE N – MARKET RISKS AND DERIVATIVE AND HEDGE CONTRACTS
We are exposed to financial and market risks that affect our businesses. We have concentrations of credit risk as a result of trade receivables owed to us by companies in the energy industry. We have currency exchange rate risk exposure related to transactions denominated in a foreign currency as well as to investments in certain of our international operations. As a result of our variable rate bank credit facilities, including the variable rate credit facility of CCLP, we face market risk exposure related to changes in applicable interest rates. Our financial risk management activities may at times involve, among other measures, the use of derivative financial instruments, such as swap and collar agreements, to hedge the impact of market price risk exposures.
Derivative Contracts
Foreign Currency Derivative Contracts. We and CCLP enter into 30-day foreign currency forward derivative contracts as part of a program designed to mitigate the currency exchange rate risk exposure on selected transactions of certain foreign subsidiaries. As of December 31, 2015, we and CCLP had the following foreign currency derivative contracts outstanding relating to a portion of our foreign operations:

Derivative Contracts |  | US Dollar Notional Amount |  | Traded Exchange Rate |  | Settlement Date
|  | (In Thousands) |  |  |  |
Forward purchase euro |  | $ | 3,768 |  |  | 1.11 |  |  | 1/19/2016
Forward purchase pounds sterling |  | $ | 12,614 |  |  | 1.52 |  |  | 1/19/2016
Forward purchase Mexican peso |  | $ | 7,850 |  |  | 17.45 |  |  | 1/19/2016
Forward purchase Saudi Arabia riyal |  | $ | 5,040 |  |  | 3.74 |  |  | 1/5/2016
Forward sale Mexican peso |  | $ | 4,641 |  |  | 17.45 |  | 1/19/2016

As of December 31, 2014, we and CCLP had the following foreign currency derivative contracts outstanding relating to a portion of our foreign operations:

Derivative Contracts |  | US Dollar Notional Amount |  | Traded Exchange Rate |  | Settlement Date
|  | (In Thousands) |  |  |  |
Forward purchase pounds sterling |  | $ | 7,024 |  |  | 1.57 |  | 1/16/2015
Forward sale Brazilian real |  | $ | 1,958 |  |  | 2.70 |  | 1/16/2015
Forward sale Canadian dollar |  | $ | 3,770 |  |  | 1.16 |  | 1/16/2015
Forward purchase Mexican peso |  | $ | 8,427 |  |  | 14.58 |  | 1/16/2015
Forward sale Canadian dollar |  | $ | 1,150 |  |  | 1.16 |  | 1/16/2015

Under this program, we and CCLP may enter into similar derivative contracts from time to time. Although contracts pursuant to this program will serve as an economic hedge of the cash flow of our currency exchange risk exposure, they are not formally designated as hedge contracts or qualify for hedge accounting treatment. Accordingly, any change in the fair value of these derivative instruments during a period will be included in the determination of earnings for that period.
The fair value of foreign currency derivative instruments are based on quoted market values as reported to us by our counterparty (a Level-2 measurement). The fair values of our foreign currency derivative instruments as of December 31, 2015 and 2014, are as follows:

Foreign currency derivative instruments | Balance Sheet Location |  | Fair Value at December 31, 2015 | Fair Value at December 31, 2014
|  |  |  | (In Thousands)
Forward purchase contracts |  | Current assets |  | $ | — |  | $ | — |
Forward sale contracts |  | Current assets |  | 23 |  | — |
Forward sale contracts |  | Current liabilities |  | (31 | ) | (91 | )
Forward purchase contracts |  | Current liabilities |  | (354 | ) | (83 | )
Total |  |  |  | $ | (362 | ) | $ | (174 | )

None of the foreign currency derivative contracts contain credit risk related contingent features that would require us to post assets or collateral for contracts that are classified as liabilities. During the year ended December 31, 2015, 2014, and 2013, we recognized approximately $0.6 million, $1.9 million and $0.03 million of net losses reflected in other expense associated with our foreign currency derivative program.
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NOTE O — INCOME (LOSS) PER SHARE
The following is a reconciliation of the common shares outstanding with the number of shares used in the computation of income (loss) per common and common equivalent share for each of the following periods:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Number of weighted average common shares outstanding |  | 79,169 |  |  | 78,600 |  |  | 77,954 |
Assumed exercise of stock options |  | — |  |  | — |  |  | 886 |
Average diluted shares outstanding |  | 79,169 |  |  | 78,600 |  |  | 78,840 |

For the year ended December 31, 2015, the average diluted shares outstanding excludes the impact of all outstanding stock options, as the inclusion of these shares would have been antidilutive due to net loss recorded during the year. For the year ended December 31, 2014, the average diluted shares outstanding excludes the impact of all outstanding stock options, as the inclusion of these shares would have been antidilutive due to the net loss recorded during the year. For the year ended December 31, 2013, the average diluted shares outstanding excludes the impact of 2,061,534 of average outstanding stock options that have exercise prices in excess of the average market price, as the inclusion of these shares would have been antidilutive.
NOTE P – INDUSTRY SEGMENTS AND GEOGRAPHIC INFORMATION
We manage our operations through five reporting segments organized into four divisions: Fluids, Production Testing, Compression, and Offshore.
Our Fluids Division manufactures and markets clear brine fluids, additives, and associated products and services to the oil and gas industry for use in well drilling, completion, and workover operations in the United States and in certain countries in Latin America, Europe, Asia, the Middle East, and Africa. The Division also markets liquid and dry calcium chloride products manufactured at its production facilities or purchased from third-party suppliers to a variety of markets outside the energy industry. The Fluids Division also provides domestic onshore oil and gas operators with comprehensive water management services.
Our Production Testing Division provides frac flowback, production well testing, offshore rig cooling, and other associated services in many of the major oil and gas producing regions in the United States, Mexico, and Canada, as well as in basins in certain regions in South America, Africa, Europe, the Middle East, and Australia.
The Compression Division is a provider of compression services and equipment for natural gas and oil production, gathering, transportation, processing, and storage. The Compression Division's equipment and parts sales business includes the fabrication and sale of standard compressor packages, custom-designed compressor packages, and oilfield pump systems designed and fabricated at the Division's facilities as well as the sale of compressor package parts and components manufactured by third-party suppliers. The Compression Division's aftermarket services business provides compressor package reconfiguration and maintenance services. The Compression Division provides its services and equipment to a broad base of natural gas and oil exploration and production, midstream, transmission, and storage companies operating throughout many of the onshore producing regions of the United States as well as in a number of foreign countries, including Mexico, Canada, and Argentina. As a result of the August 4, 2014 acquisition of CSI, the scope of our Compression Division was significantly expanded.
Our Offshore Division consists of two operating segments: Offshore Services and Maritech. The Offshore Services segment provides (1) downhole and subsea services such as well plugging and abandonment and workover services, (2) decommissioning and certain construction services utilizing heavy lift barges and various cutting technologies with regard to offshore oil and gas production platforms and pipelines, and (3) conventional and saturation diving services.
The Maritech segment is a limited oil and gas production operation. During 2011 and the first quarter of 2012, Maritech sold substantially all of its oil and gas producing property interests. Maritech’s operations consist
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primarily of the ongoing abandonment and decommissioning associated with its remaining offshore wells and production platforms. Maritech intends to acquire a portion of these services from the Offshore Services segment.
We generally evaluate the performance of and allocate resources to our segments based on profit or loss from their operations before income taxes and nonrecurring charges, return on investment, and other criteria. Transfers between segments and geographic areas are priced at the estimated fair value of the products or services as negotiated between the operating units. “Corporate overhead” includes corporate general and administrative expenses, corporate depreciation and amortization, interest income and expense, and other income and expense.
Summarized financial information concerning the business segments is as follows:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Revenues from external customers |  |  |  |  |  |  |  |  |
Product sales |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 306,307 |  |  | $ | 294,895 |  |  | $ | 281,585 |
Production Testing Division |  | 6,944 |  |  | — |  |  | — |
Compression Division |  | 141,461 |  |  | 74,827 |  |  | 8,293 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 611 |  |  | 534 |  |  | 4,707 |
Maritech |  | 2,438 |  |  | 4,722 |  |  | 5,560 |
Total Offshore Division |  | 3,049 |  |  | 5,256 |  |  | 10,267 |
Consolidated |  | $ | 457,761 |  |  | $ | 374,978 |  |  | $ | 300,145 |

Services and rentals |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 117,459 |  |  | $ | 142,139 |  |  | $ | 101,040 |
Production Testing Division |  | 122,292 |  |  | 188,528 |  |  | 194,236 |
Compression Division |  | 316,178 |  |  | 207,679 |  |  | 112,994 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 116,455 |  |  | 164,243 |  |  | 200,983 |
Maritech |  | — |  |  | — |  |  | — |
Intersegment eliminations |  | — |  |  | — |  |  | — |
Total Offshore Division |  | 116,455 |  |  | 164,243 |  |  | 200,983 |
Corporate overhead |  | — |  |  | — |  |  | — |
Consolidated |  | $ | 672,384 |  |  | $ | 702,589 |  |  | $ | 609,253 |
Interdivision revenues |  |  |  |  |  |  |  |
Fluids Division |  | $ | 278 |  |  | $ | 327 |  |  | $ | 38 |
Production Testing Division |  | 4,668 |  |  | 4,296 |  |  | 1,747 |
Compression Division |  | — |  |  | — |  |  | — |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 5,128 |  |  | 30,595 |  |  | 50,122 |
Maritech |  | — |  |  | — |  |  | — |
Intersegment eliminations |  | (5,128 | ) |  | (30,595 | ) |  | (50,122 | )
Total Offshore Division |  | — |  |  | — |  |  | — |
Interdivision eliminations |  | (4,946 | ) |  | (4,623 | ) |  | (1,785 | )
Consolidated |  | $ | — |  |  | $ | — |  |  | $ | — |
Total revenues |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 424,044 |  |  | $ | 437,362 |  |  | $ | 382,663 |
Production Testing Division |  | 133,904 |  |  | 192,824 |  |  | 195,983 |

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Compression Division |  | 457,639 |  |  | 282,505 |  |  | 121,287 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 122,194 |  |  | 195,372 |  |  | 255,812 |
Maritech |  | 2,438 |  |  | 4,722 |  |  | 5,560 |
Intersegment eliminations |  | (5,128 | ) |  | (30,595 | ) |  | (50,122 | )
Total Offshore Division |  | 119,504 |  |  | 169,499 |  |  | 211,250 |
Corporate overhead |  | — |  |  | — |  |  | — |
Interdivision eliminations |  | (4,946 | ) |  | (4,623 | ) |  | (1,785 | )
Consolidated |  | $ | 1,130,145 |  |  | $ | 1,077,567 |  |  | $ | 909,398 |

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Depreciation, amortization, and accretion |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 35,125 |  |  | $ | 31,279 |  |  | $ | 22,508 |
Production Testing Division |  | 24,080 |  |  | 29,324 |  |  | 27,262 |
Compression Division |  | 82,024 |  |  | 41,097 |  |  | 14,511 |
Offshore Division |  |  |  |  |  |  |  |
Offshore Services |  | 11,500 |  |  | 13,327 |  |  | 14,254 |
Maritech |  | 1,375 |  |  | 160 |  |  | 123 |
Intersegment eliminations |  | — |  |  | — |  |  | — |
Total Offshore Division |  | 12,875 |  |  | 13,487 |  |  | 14,377 |
Corporate overhead |  | 911 |  |  | 1,725 |  |  | 2,327 |
Consolidated |  | $ | 155,015 |  |  | $ | 116,912 |  |  | $ | 80,985 |
Interest expense |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 22 |  |  | $ | 21 |  |  | $ | 31 |
Production Testing Division |  | — |  |  | 29 |  |  | 16 |
Compression Division |  | 32,447 |  |  | 13,361 |  |  | 500 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | — |  |  | 36 |  |  | 109 |
Maritech |  | 29 |  |  | — |  |  | 11 |
Intersegment eliminations |  |  |  |  | — |  |  | — |
Total Offshore Division |  | 29 |  |  | 36 |  |  | 120 |
Corporate overhead |  | 18,704 |  |  | 19,297 |  |  | 16,725 |
Consolidated |  | $ | 51,202 |  |  | $ | 32,744 |  |  | $ | 17,392 |
Income (loss) before taxes |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 80,789 |  |  | $ | 64,705 |  |  | $ | 69,438 |
Production Testing Division |  | (55,720 | ) |  | (66,156 | ) |  | 14,093 |
Compression Division |  | (146,798 | ) |  | 7,340 |  |  | 20,200 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | (195 | ) |  | (26,251 | ) |  | 22,870 |
Maritech |  | (3,833 | ) |  | (71,154 | ) |  | (64,365 | )
Intersegment eliminations |  | — |  |  | — |  |  | — |
Total Offshore Division |  | (4,028 | ) |  | (97,405 | ) |  | (41,495 | )
Interdivision eliminations |  | (1 | ) |  | — |  |  | — |
Corporate overhead(1) |  | (76,005 | ) |  | (66,355 | ) |  | (62,364 | )
Consolidated |  | $ | (201,763 | ) |  | $ | (157,871 | ) |  | $ | (128 | )

F-44

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Total assets |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 370,892 |  |  | $ | 423,989 |  |  | $ | 400,028 |
Production Testing Division |  | 134,725 |  |  | 241,640 |  |  | 327,413 |
Compression Division |  | 1,018,584 |  |  | 1,273,580 |  |  | 230,829 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 131,916 |  |  | 129,350 |  |  | 181,617 |
Maritech |  | 18,453 |  |  | 23,479 |  |  | 46,903 |
Intersegment eliminations |  | — |  |  | — |  |  | — |
Total Offshore Division |  | 150,369 |  |  | 152,829 |  |  | 228,520 |
Corporate overhead |  | (18,194 | ) |  | (9,650 | ) |  | 19,743 |
Consolidated |  | $ | 1,656,376 |  |  | $ | 2,082,388 |  |  | $ | 1,206,533 |
Capital expenditures |  |  |  |  |  |  |  |  |
Fluids Division |  | $ | 11,104 |  |  | $ | 41,307 |  |  | $ | 45,238 |
Production Testing Division |  | 7,843 |  |  | 31,226 |  |  | 26,757 |
Compression Division |  | 95,586 |  |  | 37,516 |  |  | 24,103 |
Offshore Division |  |  |  |  |  |  |  |  |
Offshore Services |  | 5,949 |  |  | 20,013 |  |  | 4,207 |
Maritech |  | 38 |  |  | — |  |  | 21 |
Intersegment eliminations |  | — |  |  | — |  |  | — |
Total Offshore Division |  | 5,987 |  |  | 20,013 |  |  | 4,228 |
Corporate overhead |  | 77 |  |  | 1,547 |  |  | 1,053 |
Consolidated |  | $ | 120,597 |  |  | $ | 131,609 |  |  | $ | 101,379 |

(1) | Amounts reflected include the following general corporate expenses:

|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
General and administrative expense |  | $ | 52,189 |  |  | $ | 41,139 |  |  | $ | 40,506 |
Depreciation and amortization |  | 913 |  |  | 1,725 |  |  | 2,327 |
Interest expense, net |  | 18,654 |  |  | 19,268 |  |  | 16,715 |
Other general corporate (income) expense, net |  | 4,249 |  |  | 4,223 |  |  | 2,816 |
Total |  | $ | 76,005 |  |  | $ | 66,355 |  |  | $ | 62,364 |

F-45

Summarized financial information concerning the geographic areas of our customers and in which we operate at December 31, 2015, 2014, and 2013, is presented below:

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Revenues from external customers: |  |  |  |  |  |  |  |  |
U.S. |  | $ | 896,131 |  |  | $ | 768,688 |  |  | $ | 673,376 |
Canada and Mexico |  | 44,542 |  |  | 73,632 |  |  | 58,080 |
South America |  | 26,554 |  |  | 40,719 |  |  | 31,788 |
Europe |  | 80,432 |  |  | 105,457 |  |  | 102,990 |
Africa |  | 20,761 |  |  | 22,277 |  |  | 15,127 |
Asia and other |  | 61,725 |  |  | 66,794 |  |  | 28,037 |
Total |  | $ | 1,130,145 |  |  | $ | 1,077,567 |  |  | $ | 909,398 |
Transfers between geographic areas: |  |  |  |  |  |  |  |  |
U.S. |  | $ | — |  |  | $ | — |  |  | $ | — |
Canada and Mexico |  | — |  |  | — |  |  | — |
South America |  | — |  |  | — |  |  | — |
Europe |  | 1,252 |  |  | 2,871 |  |  | 112 |
Africa |  | — |  |  | — |  |  | — |
Asia and other |  | — |  |  | — |  |  | — |
Eliminations |  | (1,252 | ) |  | (2,871 | ) |  | (112 | )
Total revenues |  | $ | 1,130,145 |  |  | $ | 1,077,567 |  |  | $ | 909,398 |
Identifiable assets: |  |  |  |  |  |  |  |  |
U.S. |  | $ | 1,427,481 |  |  | $ | 1,778,357 |  |  | $ | 852,483 |
Canada and Mexico |  | 72,007 |  |  | 97,737 |  |  | 104,831 |
South America |  | 25,035 |  |  | 32,267 |  |  | 43,326 |
Europe |  | 64,695 |  |  | 94,209 |  |  | 150,415 |
Africa |  | 7,541 |  |  | 7,895 |  |  | 9,063 |
Asia and other |  | 59,617 |  |  | 71,923 |  |  | 46,351 |
Eliminations and discontinued operations |  | — |  |  | — |  |  | 64 |
Total identifiable assets |  | $ | 1,656,376 |  |  | $ | 2,082,388 |  |  | $ | 1,206,533 |

During each of the three years ended December 31, 2015, 2014, and 2013, no single customer accounted for more than 10% of our consolidated revenues.
NOTE Q — SUPPLEMENTAL OIL AND GAS DISCLOSURES (Unaudited)
As part of the Offshore Division activities, Maritech and its subsidiaries previously acquired oil and gas reserves and operated the properties in exchange for assuming the proportionate share of the well abandonment and decommissioning obligations associated with such properties. Accordingly, our Maritech segment is included within our Offshore Division. During 2011 and the first quarter of 2012, Maritech sold substantially all of its oil and gas producing property interests. Maritech's current operations consist primarily of the ongoing abandonment and decommissioning associated with its remaining offshore wells and production platforms. Accordingly, information regarding costs incurred in property acquisition, exploration, and development activities, capitalized costs related to oil and gas producing activities, estimated quantities of oil and gas reserves, and standardized measure of discounted future net cash flows relating to oil and gas reserves have not been presented, as such information is immaterial during each of the three years in the period ended December 31, 2015.
Results of Operations for Oil and Gas Producing Activities
Results of operations for oil and gas producing activities excludes general and administrative and interest expenses directly related to such activities as well as any allocation of corporate or divisional overhead.
F-46

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In Thousands)
Oil and gas sales revenues |  | $ | 2,438 |  |  | $ | 4,722 |  |  | $ | 5,560 |
Production (lifting) costs |  | 921 |  |  | 2,002 |  |  | 2,637 |
Depreciation, depletion, and amortization |  | — |  |  | 30 |  |  | 37 |
Excess decommissioning and abandonment costs |  | 2,665 |  |  | 73,194 |  |  | 75,313 |
Accretion expense |  | 1,375 |  |  | 130 |  |  | 87 |
Gain on insurance recoveries |  |  |  |  | (6 | ) |  | (5,685 | )
Pretax income (loss) from producing activities |  | (2,523 | ) |  | (70,628 | ) |  | (66,829 | )
Income tax expense (benefit) |  | — |  |  | — |  |  | (23,390 | )
Results of oil and gas producing activities |  | $ | (2,523 | ) |  | $ | (70,628 | ) |  | $ | (43,439 | )

NOTE R — QUARTERLY FINANCIAL INFORMATION (Unaudited)
Summarized quarterly financial data for 2015 and 2014 is as follows:

|  | Three Months Ended 2015
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In Thousands, Except Per Share Amounts)
Total revenues |  | $ | 251,092 |  |  | $ | 316,319 |  |  | $ | 305,144 |  |  | $ | 257,590 |
Gross profit (loss) |  | 46,087 |  |  | 69,861 |  |  | 70,534 |  |  | 2,755 |
Net income (loss) |  | (3,622 | ) |  | 15,367 |  |  | 10,736 |  |  | (231,946 | )
Net income (loss) attributable to TETRA stockholders |  | (4,447 | ) |  | 14,925 |  |  | 9,755 |  |  | (146,415 | )
Net income (loss) per share before discontinued operations attributable to TETRA stockholders |  | $ | (0.06 | ) |  | $ | 0.19 |  |  | $ | 0.12 |  |  | $ | (1.84 | )
Net income (loss) per diluted share before discontinued operations attributable to TETRA stockholders |  | $ | (0.06 | ) |  | $ | 0.19 |  |  | $ | 0.12 |  |  | $ | (1.84 | )

|  | Three Months Ended 2014
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In Thousands, Except Per Share Amounts)
Total revenues |  | $ | 212,857 |  |  | $ | 242,489 |  |  | $ | 306,371 |  |  | $ | 315,850 |
Gross profit |  | 24,850 |  |  | 35,475 |  |  | 34,744 |  |  | (1,428 | )
Net income (loss) |  | (6,090 | ) |  | (1,550 | ) |  | (12,467 | ) |  | (147,468 | )
Net income (loss) attributable to TETRA stockholders |  | (6,934 | ) |  | (2,457 | ) |  | (10,537 | ) |  | (149,750 | )
Net income (loss) per share before discontinued operations attributable to TETRA stockholders |  | $ | (0.09 | ) |  | $ | (0.03 | ) |  | $ | (0.13 | ) |  | $ | (1.90 | )
Net income (loss) per diluted share before discontinued operations attributable to TETRA stockholders |  | $ | (0.09 | ) |  | $ | (0.03 | ) |  | $ | (0.13 | ) |  | $ | (1.90 | )

Gross profit (loss) for the three months ended December 31, 2015, includes the impact of $44.2 million for certain impairments of long-lived assets, and net loss for this period includes the additional impact of $177.0 million for impairment of goodwill.
Gross profit (loss) for the three months ended December 31, 2014, includes the impact of $34.8 million for certain impairments of long-lived assets, and net loss for this period includes the additional impact of $60.4 million for impairment of goodwill.
F-47

TETRA Technologies, Inc. and Subsidiaries
Schedule I - Condensed Financial Information of Registrant (Parent Only)
Statement of Financial Position
(In Thousands)

| December 31,
| 2015 |  | 2014
Assets |  |  |
Current Assets |  |  |
Accounts receivable | $ | 54,187 |  |  | $ | 54,131 |
Inventories | 39,766 |  |  | 43,073 |
Prepaid expenses | 4,903 |  |  | 4,963 |
Other current assets | 6,055 |  |  | 8,365 |
Total current assets | 104,911 |  |  | 110,532 |
Property, plant and equipment | 346,622 |  |  | 358,806 |
Less accumulated depreciation | (171,931 | ) |  | (145,529 | )
Property, plant, and equipment, net | 174,691 |  |  | 213,277 |
Other assets, including investment in and amounts due from wholly owned subsidiaries | 942,043 |  |  | 1,063,095 |
Total assets | 1,221,645 |  |  | 1,386,904 |
Liabilities and shareholders' equity |  |  |  |  |
Current liabilities | 57,162 |  |  | 145,467 |
Long-term debt | 292,921 |  |  | 305,000 |
Other non-current liabilities | 630,345 |  |  | 566,724 |
Total liabilities | 980,428 |  |  | 1,017,191 |
Shareholders' equity |  |  |
Common stock | 830 |  |  | 823 |
Other shareholders' equity | 283,522 |  |  | 395,105 |
Accumulated other comprehensive income (loss) | (43,135 | ) |  | (26,215 | )
Total Stockholders' Equity | 241,217 |  |  | 369,713 |
Total liabilities and equity | $ | 1,221,645 |  |  | $ | 1,386,904 |

F-48

TETRA Technologies, Inc. and Subsidiaries
Schedule I - Condensed Financial Information of Registrant (Parent Only)
Statements of Operations
(In Thousands)

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Net sales and gross revenues |  | $314,567 |  | $303,349 |  | $280,390
Cost of revenues |  | 189,362 |  |  | 210,787 |  |  | 186,616 |
Depreciation, amortization, and accretion |  | 50,708 |  |  | 32,267 |  |  | 21,650 |
General and administrative expenses |  | 69,925 |  |  | 58,978 |  |  | 56,816 |
Interest expense |  | 18,726 |  |  | 19,217 |  |  | 16,724 |
Other income (expense), net |  | 2,272 |  |  | 3,700 |  |  | 313 |
Equity in net loss of subsidiaries |  | 192,242 |  |  | 141,203 |  |  | 2,967 |
|  | 523,235 |  |  | 466,152 |  |  | 285,086 |
Income (loss) before taxes and discontinued operations |  | (208,668 | ) |  | (162,803 | ) |  | (4,696 | )
Provision (benefit) for income taxes |  | 799 |  |  | 4,772 |  |  | (8,022 | )
Income (loss) |  | $ | (209,467 | ) |  | $ | (167,575 | ) |  | $ | 3,326 |

F-49

TETRA Technologies, Inc. and Subsidiaries
Schedule I - Condensed Financial Information of Registrant (Parent Only)
Statements of Cash Flows
(In Thousands)

|  | Year Ended December 31,
|  | 2015 |  | 2014 |  | 2013
Net cash provided by operating activities |  | $ | 100,370 |  |  | $ | 87,451 |  |  | $ | (8,074 | )
Investing activities: |  |  |  |  |  |
Acquisition of businesses, net of cash acquired |  | — |  |  | (14,799 | ) |  | — |
Purchases of property, plant and equipment |  | 678 |  |  | (26,067 | ) |  | (40,858 | )
Proceeds from sale of property, plant, and equipment |  | 2,146 |  |  | 6,210 |  |  | 1,881 |
Advances and other investing activities |  | 1,626 |  |  | 616 |  |  | 118 |
Net cash provided by (used in) investing activities |  | 4,450 |  |  | (34,040 | ) |  | (38,859 | )
Financing activities: |  |  |  |  |  |
Proceeds from long-term debt |  | 472,896 |  |  | 143,188 |  |  | 121,062 |
Payments of long-term debt |  | (575,070 | ) |  | (195,956 | ) |  | (120,664 | )
Finance costs |  | (3,742 | ) |  | — |  |  |
Proceeds from sale of common stock and exercise of stock options |  | 303 |  |  | 1,032 |  |  | 273 |
Net cash provided by (used in) financing activities |  | (105,613 | ) |  | (51,736 | ) |  | 671 |
Increase (decrease) in cash |  | (793 | ) |  | 1,675 |  |  | (46,262 | )
Cash and cash equivalents at beginning of period |  | 231 |  |  | (1,444 | ) |  | 44,818 |
Cash and cash equivalents at end of period |  | $ | (562 | ) |  | $ | 231 |  |  | $ | (1,444 | )

F-50

TETRA Technologies, Inc. and Subsidiaries
Schedule I - Condensed Financial Information of Registrant (Parent Only)
NOTE A- BASIS OF PRESENTATION
In the parent-company-only financial statements, the Company's investment in subsidiaries is stated at cost plus equity in undistributed earnings of subsidiaries since the date of the respective acquisition. The Company's share of net income of its unconsolidated subsidiaries is included in consolidated income using the equity method. The parent-company-only financial statements should be read in conjunction with the Company's consolidated financial statements.
Previously reported financial statement information for financial position, results of operations, and cash flows has been modified to conform to the current period presentation.
F-51