<SEC-DOCUMENT>0000352825-18-000024.txt : 20180627
<SEC-HEADER>0000352825-18-000024.hdr.sgml : 20180627
<ACCEPTANCE-DATETIME>20180627155023
ACCESSION NUMBER:		0000352825-18-000024
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180627
DATE AS OF CHANGE:		20180627

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FOSTER L B CO
		CENTRAL INDEX KEY:			0000352825
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
		IRS NUMBER:				251324733
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10436
		FILM NUMBER:		18921767

	BUSINESS ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220
		BUSINESS PHONE:		4129283431

	MAIL ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>lbfosterco11-k2017ces.htm
<DESCRIPTION>11-K
<TEXT>
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<div><a name="s566FE4DBD6365E8A8A4E1C20FFE86153"></a></div><div></div><div><br></div><div style="line-height:120%;padding-top:5px;text-align:center;font-size:16pt;"><font style="font-family:inherit;font-size:16pt;font-weight:bold;">UNITED STATES</font></div><div style="line-height:120%;text-align:center;font-size:16pt;"><font style="font-family:inherit;font-size:16pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">WASHINGTON, D.C. 20549</font></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:18pt;"><font style="font-family:inherit;font-size:18pt;font-weight:bold;">FORM 11-K</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;"><hr></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;padding-top:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">(Mark One)</font></div><div style="line-height:120%;font-size:12pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:4%;"></td><td style="width:96%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#9746;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT&#160;OF&#160;1934.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">For the fiscal year ended </font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">December&#160;31, 2017</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">OR</font></div><div style="line-height:120%;font-size:12pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:4%;"></td><td style="width:96%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#9744;</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;font-weight:bold;">TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">For the transition period from </font><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family:inherit;font-size:10pt;font-weight:bold;">&#32;to </font><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Commission file number 0-10436</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><div style="line-height:120%;text-align:center;"><hr></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:3%;"></td><td style="width:97%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">A.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Full title of the plan and the address of plan, if different from that of the issuer named below</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Chemtec Energy Services 401(k) Plan</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:3%;"></td><td style="width:97%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">B.</font></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Name of issuer of the securities held pursuant to the plan and the address of its principal executive office</font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">L.B. FOSTER COMPANY</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">415 Holiday Drive</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Pittsburgh, PA 15220</font></div><div><br></div><div></div><hr style="page-break-after:always"><div><a name="s4CB0255160845C5B9F11D91182A6778C"></a></div><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chemtec Energy Services</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">401(k) Plan</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial Statements and</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Supplemental Schedule</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">&#32;and the</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Year Ended </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;</font></div><div style="line-height:120%;padding-top:16px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Contents</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="2"></td></tr><tr><td style="width:83%;"></td><td style="width:17%;"></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial Statements</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#sFF36F090F2E95C4F8EAFCD98C3FBB640"><font style="font-family:inherit;font-size:10pt;">Statements of Net Assets Available for Benefits</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#sFF36F090F2E95C4F8EAFCD98C3FBB640">3</a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s81AD366FBBCD525D8FFE753E78303E1C"><font style="font-family:inherit;font-size:10pt;">Statement of Changes in Net Assets Available for Benefits</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s81AD366FBBCD525D8FFE753E78303E1C">4</a></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s78FEA65103415F96BA8DE2EC2447590B"><font style="font-family:inherit;font-size:10pt;">Notes to Financial Statements</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s78FEA65103415F96BA8DE2EC2447590B">5</a></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s394AFC78F0B356759BD0A2CBD6259A9E"><font style="font-family:inherit;font-size:10pt;">Signature</font></a></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;" href="#s394AFC78F0B356759BD0A2CBD6259A9E">9</a></div></td></tr></table></div></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Note: Other supplemental schedules required by Section&#160;2520.103-10 of the Department of Labor&#8217;s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted because they are not applicable to the Chemtec Energy Services 401(k) Plan (the &#8220;Plan&#8221;). The Plan is a defined contribution plan that meets the conditions for an audit waiver under the Department of Labor&#8217;s Regulation 29 CFR 2520.104-46.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2</font></div></div><hr style="page-break-after:always"><div><a name="sFF36F090F2E95C4F8EAFCD98C3FBB640"></a></div><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chemtec Energy Services</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">401(k) Plan</font></div><div style="line-height:120%;padding-top:8px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Statements of Net Assets Available for Benefits</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="9"></td></tr><tr><td style="width:68%;"></td><td style="width:1%;"></td><td style="width:1%;"></td><td style="width:13%;"></td><td style="width:1%;"></td><td style="width:1%;"></td><td style="width:1%;"></td><td style="width:13%;"></td><td style="width:1%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="7" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">December 31,</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2017</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;font-weight:bold;">2016</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Assets</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Investments, at fair value</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">927,597</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Receivables:</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Contributions receivable from employee</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">30,982</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Contributions receivable from employer</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11,425</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total receivables</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">42,407</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Net assets available for benefits</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">970,004</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr></table></div></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">See accompanying notes.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">3</font></div></div><hr style="page-break-after:always"><div><a name="s81AD366FBBCD525D8FFE753E78303E1C"></a></div><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chemtec Energy Services</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">401(k) Plan</font></div><div style="line-height:120%;padding-top:8px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Statement of Changes in Net Assets Available for Benefits</font></div><div style="line-height:120%;padding-top:8px;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Year Ended </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"></td></tr><tr><td style="width:84%;"></td><td style="width:1%;"></td><td style="width:1%;"></td><td style="width:13%;"></td><td style="width:1%;"></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Additions</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Investment income:</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Interest and dividends</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">55,806</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Net realized/unrealized appreciation in investment fair value</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">157,202</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:52px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total investment income</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">213,008</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Interest income from notes receivable from participants</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">514</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Contributions:</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Employee</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">192,232</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Employer</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">59,914</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:52px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total contributions</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">252,146</font></div></td><td style="vertical-align:bottom;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total additions</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">465,668</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Deductions</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Deductions from net assets attributable to:</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Benefit payments</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">111,506</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Corrective distributions</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">44,873</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Administrative expenses</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6,933</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Total deductions</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">163,312</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Increase in net assets available for benefits before transfers</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">302,356</font></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Transfer of assets to affiliated plan</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(1,272,360</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Decrease in net assets available for benefits after transfers</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(970,004</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">)</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Net assets available for benefits, beginning of year</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">970,004</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Net assets available for benefits, end of year</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#8212;</font></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div></td></tr></table></div></div><div style="line-height:120%;font-size:6pt;"><font style="font-family:inherit;font-size:6pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">See accompanying notes.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">4</font></div></div><hr style="page-break-after:always"><div><a name="s78FEA65103415F96BA8DE2EC2447590B"></a></div><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Chemtec Energy Services</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">401(k) Plan</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Notes to Financial Statements</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font></div><div><a name="sD0F490FEFEB250289C279B385B32B33C"></a></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">1. Description of Plan</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following brief description of the Chemtec Energy Services 401(k) Plan (the&#160;&#8220;Plan&#8221;) is provided for general information purposes. Participants should refer to the summary plan description for more complete information. The plan document is the governing instrument and should be referred to for a full description of the Plan and its provisions.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">, the L.B. Foster Company Investment Committee elected to merge the Plan with the L.B. Foster Company 401(k) and Profit Sharing Plan (the &#8220;L.B. Foster Plan&#8221;). The total fair market value of the net assets transferred from the Plan to the L.B. Foster Plan was </font><font style="font-family:inherit;font-size:10pt;">$1,272,360</font><font style="font-family:inherit;font-size:10pt;">.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">General</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Plan is a defined contribution plan extended to all eligible employees of Chemtec Energy Services, LLC who have attained age 18. The L.B. Foster Company Investment Committee, appointed by the Board of Directors of L.B. Foster Company, collectively serves as the plan administrator. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (&#8220;ERISA&#8221;), as amended.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Contributions and Forfeitures</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Contributions under the Plan are made by both the participants and L.B. Foster Company (the &#8220;Company&#8221;). Participants may contribute up to 75% of their annual pretax compensation and up to 100% of their compensation on an after-tax basis, subject to Internal Revenue Code (the &#8220;Code&#8221;) limitations. However, there is no limit on aggregate pretax and after-tax contributions. Participant contributions and employer matching contributions are invested in accordance with participant elections. In the event that a participant does not make an investment election, contributions are invested in the Fidelity Freedom Fund (target date retirement fund) that coincides with the participant&#8217;s date of normal retirement age until such time as an election is made by the participant. The participant may transfer contributions defaulted to these funds into other investment options at the participant&#8217;s discretion.</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company, upon resolution of the Company's Board of Directors, may make a discretionary&#160;profit-sharing&#160;contribution of an amount out of, but not in excess of, the Company's current or accumulated profits. Participants must have attained one year of service as of the last day of the plan year in order to be eligible for the discretionary&#160;profit-sharing&#160;contribution, if any, for that year.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company&#8217;s matching contributions may be reduced by forfeitures that accumulate from terminations of participants with non-vested employer matching contributions. At </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, forfeitures of </font><font style="font-family:inherit;font-size:10pt;">$0</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">$82</font><font style="font-family:inherit;font-size:10pt;">, respectively, were available to reduce future Company contributions. During the year ended </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">, forfeitures of </font><font style="font-family:inherit;font-size:10pt;">$5,426</font><font style="font-family:inherit;font-size:10pt;">&#32;were utilized to reduce Company contributions and Plan expenses.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Participant Accounts</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Each participant account is credited with the participant&#8217;s contributions, the participant&#8217;s allocable share of Company contributions, and related earnings (losses) of the funds. Participant accounts may be invested in 10% increments into Company stock or any of the mutual funds available under the Plan or other investment securities through a self-directed brokerage option at the direction of the participant.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Vesting</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">A participant&#8217;s vested interest in the Plan on any date is equal to the sum of the values of (a)&#160;that portion of the participant&#8217;s account attributable to the participant&#8217;s contributions, (b)&#160;that portion of the participant&#8217;s account attributable to the Company&#8217;s contributions multiplied by the applicable vesting percentage, and (c)&#160;related earnings (losses). Participants are 100% vested in Company contributions after two years of eligible service.</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Notwithstanding the above, a participant who terminates from the Plan by reason of retirement, disability, or death is fully vested in his or her participant account immediately upon such event.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Benefit Payments</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Normal retirement age is 65. The Plan also allows for age 59&#160;</font><font style="font-family:inherit;font-size:8pt;">1&#8260;2</font><font style="font-family:inherit;font-size:10pt;">&#160;in-service withdrawals of all or any portion of the participant&#8217;s vested account balance.</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As provided by the Plan, the distribution to which a participant is entitled by reason of normal, early, late, or disability retirement, death, or termination of employment may be made in the form of direct rollover, annuity, cash, or partly in cash and partly as an annuity. The amount of such distribution is equal to the participant&#8217;s vested account balance on the valuation date.</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Under the Plan, a participant may elect to withdraw voluntary, after-tax contributions made to the Plan prior to January&#160;1, 1987. Such withdrawals are subject to a $1,000 minimum. In the event of extreme hardship and subject to certain restrictions and </font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5</font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">limitations, a participant may withdraw their vested interest in the portion of their account, subject to a $500 minimum, attributable to matching, fixed and discretionary contributions, and related earnings.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Plan Termination</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. Should the Plan be terminated, participants will become fully vested in their accounts, and the assets of the Plan would be distributed to the participants based on their individual account balances as determined under the Plan provisions. The </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;merger of the Plan with the L.B. Foster Plan is not a termination of the Plan under these provisions.</font></div><div><a name="sCFBBF41BF05D531DBE748BEA2840F122"></a></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">2. Summary of Significant Accounting Policies</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Basis of Accounting</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The financial statements of the Plan are maintained under the accrual method of accounting in conformity with the accounting principles generally accepted in the United States (&#8220;GAAP&#8221;).</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in accordance with GAAP requires management to make estimates that affect the amounts reported in the financial statements, accompanying notes, and supplemental schedule. Actual results could differ from those estimates.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Risks and Uncertainties</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market, and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants&#8217; account balances and the amounts reported in the statements of net assets available for benefits.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Market values for investments may decline for a number of reasons, including changes in prevailing market and interest rates, increases in defaults, and credit rating downgrades. The fair values assigned to the investments by the Plan are based upon available information believed to be reliable, which may be affected by conditions in the financial markets. The Plan may not be able to sell its investments when it desires to do so or to realize what it perceives to be its fair value in the event of a sale.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Valuation of Investments and Income Recognition</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Investments are reported at fair value. Fair value is 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. See Note 4 for discussion of fair value measurements.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Net appreciation includes the Plan&#8217;s gains and losses on investments bought and sold as well as held during the year. Dividend income is recorded on the ex-dividend date and interest income is accrued as earned. Plan assets are concentrated in mutual funds consisting primarily of stocks, bonds, and Company stock. Realization of the Plan&#8217;s net assets available for benefits is dependent on the results of these markets.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Benefit Payments</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Benefit payments are recorded upon distribution of proceeds to a Plan participant.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Administrative Expenses</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company, as provided by the Plan, pays expenses of the Plan. Certain administrative functions are performed by employees of the Company. No such employees receive compensation from the Plan. Expenses incurred to establish and maintain a loan are charged to the applicable participant.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Subsequent Events</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">At the date the financial statements were available to be issued, the Plan&#8217;s management concluded that there were no subsequent events requiring adjustments to the financial statements or additional disclosures as stated herein.</font></div><div><a name="sA2CDA350D24354ACAF7EC21C78FC7CD6"></a></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">3. Income Tax Status</font></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The underlying volume submitter plan has received an advisory letter from the Internal Revenue Service (&#8220;IRS&#8221;) dated March&#160;31, 2014 stating that the form of the plan is qualified under Section&#160;401 of the Internal Revenue Code (&#8220;the Code&#8221;) and therefore, the related trust is tax-exempt. In accordance with Revenue Procedures 2013-6 and 2011-49, the plan administrator has determined that it is eligible to and has chosen to rely on the current IRS volume submitter advisory letter. Once qualified, the Plan is required to operate in conformity with the Code to maintain its qualified status. The plan administrator believes the Plan is being operated in compliance with the applicable requirements of the Code and therefore believes the Plan is qualified and the related trust is tax-exempt.</font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">6</font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;padding-top:4px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">GAAP requires plan management to evaluate uncertain tax positions taken by the Plan. The financial statement effects of a tax position are recognized when the position is more likely than not, based on the technical merits, to be sustained upon examination by the IRS. The plan administrator has analyzed the tax positions taken by the Plan, and has concluded that as of </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">, there are no uncertain positions taken or expected to be taken. The Plan has recognized no interest or penalties related to uncertain tax positions. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.</font></div><div><a name="s079B54798070566895A47B7000F86903"></a></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">4. Fair Value Measurements</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Plan applies the provisions of Accounting Standards Codification Topic 820, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Fair Value Measurements and Disclosures</font><font style="font-family:inherit;font-size:10pt;">&#32;(&#8220;ASC 820&#8221;), to its financial assets carried in the financial statements at fair value on a recurring basis. ASC 820 defines fair value as the exchange price that would be received to sell an asset in an orderly transaction between market participants at the measurement date. ASC 820 also establishes a fair value hierarchy and requires categorization of assets measured at fair value into one of three levels based on the inputs used in the valuation. Assets are classified in their entirety based on the lowest level of input significant to the fair value measurement. The three levels are defined as: </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:47px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:23px;"><font style="font-family:inherit;font-size:10pt;">&#8226;</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Level 1&#160;&#8211;&#160;Observable inputs based on quoted prices (unadjusted) in active markets for identical assets.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:47px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:23px;"><font style="font-family:inherit;font-size:10pt;">&#8226;</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Level 2&#160;&#8211;&#160;Observable inputs, other than those included in Level 1, based on quoted prices for similar assets in active markets or quoted prices for identical assets in inactive markets.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:47px;"></td><td></td></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:23px;"><font style="font-family:inherit;font-size:10pt;">&#8226;</font></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Level 3&#160;&#8211;&#160;Unobservable inputs that reflect an entity&#8217;s own assumptions about the inputs a market participant would use in pricing the asset based on the best information available in the circumstances.</font></div></td></tr></table><div style="line-height:120%;padding-left:4px;padding-top:4px;text-align:left;padding-left:47px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br></font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">There have been no changes in the methodologies used at </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, nor have there been any transfers between levels during the years presented. The following is a description of the investments and valuation methodologies used for assets measured at fair value:</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Common stock</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company's common stock is the only common stock investment available to the Plan and is valued daily at the closing price reported on the active market.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Mutual funds</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Various mutual funds are offered to the Plan participants. Mutual funds are publicly traded investments and are valued daily at the closing price reported on the active market on which the funds are traded.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Stable value collective trust fund</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Fidelity Managed Income Portfolio Class I Fund (&#8220;MIP CL 1 Fund&#8221;) is the only stable value collective trust fund available to the Plan. The Plan uses the net asset value (&#8220;NAV&#8221;) per share of the MIP CL 1 Fund provided by the trustee as a practical expedient to estimate fair value. The practical expedient would not be used if it is determined to be probable that the fund will sell the investment for an amount different from the reported NAV. Participant transactions (purchases and sales) may occur daily. If the Plan initiates a full redemption of the MIP CL 1 Fund, the issuer reserves the right to require 12 months&#8217; notification in order to ensure that securities liquidations will be carried out in an orderly business manner. The MIP CL 1 Fund&#8217;s units are issued and redeemed daily at the constant NAV of $1 per unit. The Fund&#8217;s investment objective is stability of principal and high current income.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Self-directed brokerage accounts</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Accounts primarily consist of publicly traded cash reserves, common stocks, preferred stock, and publicly traded partnerships and trusts that are valued on the basis of readily determinable market prices.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Investments included in the statements of net assets available for benefits include mutual funds totaling </font><font style="font-family:inherit;font-size:10pt;">$0</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">$920,631</font><font style="font-family:inherit;font-size:10pt;">, the Company&#8217;s common stock fund of </font><font style="font-family:inherit;font-size:10pt;">$0</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">$3,603</font><font style="font-family:inherit;font-size:10pt;">, and the Company&#8217;s Stock Purchase Account of </font><font style="font-family:inherit;font-size:10pt;">$0</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">$1,076</font><font style="font-family:inherit;font-size:10pt;">, which are stated at fair value as of </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, respectively. These investments are valued using daily unadjusted quoted prices and are Level&#160;1 fair value measurements.</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Excluded from the fair value disclosure above, the investment in the stable value collective trust fund is measured at net asset value per share. The net asset value as of </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">&#32;for the investment in the MIP CL 1 Fund is </font><font style="font-family:inherit;font-size:10pt;">$0</font><font style="font-family:inherit;font-size:10pt;">&#32;and </font><font style="font-family:inherit;font-size:10pt;">$2,287</font><font style="font-family:inherit;font-size:10pt;">, respectively. There are no unfunded commitments in regards to the MIP CL I Fund at </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2017</font><font style="font-family:inherit;font-size:10pt;">.</font></div><div><a name="s03A2349F463A5A53BE659574AD70F369"></a></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">5. Transactions with Parties-in-Interest</font></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain trustee, accounting, and administrative expenses relating to the maintenance of participant records and the Plan&#8217;s administration are absorbed by the Company and may qualify as party-in-interest transactions under ERISA. The Plan also </font></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">7</font></div></div><hr style="page-break-after:always"><div><div style="line-height:120%;font-size:10pt;"><a style="font-family:inherit;font-size:10pt;font-weight:bold;" href="#s4CB0255160845C5B9F11D91182A6778C"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Table of Contents</font></a></div></div><div><br></div><div style="line-height:120%;padding-top:4px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">invests in Company stock. The Company is the plan sponsor, and therefore, transactions with the Company may qualify as exempt party-in-interest. 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persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.</font></div><div style="line-height:120%;font-size:12pt;"><font style="font-family:inherit;font-size:12pt;">&#160;</font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="4"></td></tr><tr><td style="width:6%;"></td><td style="width:17%;"></td><td style="width:44%;"></td><td style="width:33%;"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">Chemtec Energy Services 401(k) Plan</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">(Name of Plan)</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Date:</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">June&#160;27, 2018</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">/s/ Brian H. Kelly</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Brian H. Kelly</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Senior Vice President -</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Human Resources and Administration</font></div></td></tr></table></div></div><div><br></div><div style="text-align:center;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">9</font></div></div>	</body>
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