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Segment Information (Tables)

9 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Components of Segment Revenues, Segment Expenses and Segment Adjusted EBITDA

Segment Revenues, Segment Expenses and Segment Adjusted EBITDA were as follows:

		Three Months Ended September 30,
		2025												2024
(in thousands)		Segment Revenues				Segment Expenses				Segment Adjusted EBITDA				Segment Revenues				Segment Expenses				Segment Adjusted EBITDA
Assessment, Permitting and Response		$	91,081			$	70,645			$	20,436			$	52,019			$	40,831			$	11,188
Measurement and Analysis			62,958				45,675				17,283				58,583				45,213				13,370
Remediation and Reuse			70,849				61,437				9,412				68,085				56,430				11,655
Total Reportable Segments		$	224,888							$	47,131			$	178,687							$	36,213
		Nine Months Ended September 30,
		2025												2024
(in thousands)		Segment Revenues				Segment Expenses				Segment Adjusted EBITDA				Segment Revenues				Segment Expenses				Segment Adjusted EBITDA
Assessment, Permitting and Response		$	248,144			$	189,581			$	58,563			$	164,043			$	123,955			$	40,088
Measurement and Analysis			184,783				135,429				49,354				158,889				126,656				32,233
Remediation and Reuse			204,338				178,969				25,369				184,405				158,811				25,594
Total Reportable Segments		$	637,265							$	133,286			$	507,337							$	97,915

Reconciliation of Segment Measure to Net Loss

Presented below is a reconciliation of the Company’s segment measure to income (loss) before expense from income taxes:

		For the Three Months Ended September 30,								For the Nine Months Ended September 30,
		2025				2024				2025				2024
Total Reportable Segments		$	47,131			$	36,213			$	133,286			$	97,915
Corporate and Other			(13,470	)			(7,901	)			(41,010	)			(29,367	)
Interest expense, net			(5,039	)			(4,137	)			(14,872	)			(11,420	)
Depreciation and amortization			(12,958	)			(13,240	)			(39,015	)			(37,408	)
Stock-based compensation			(9,220	)			(11,763	)			(33,777	)			(34,866	)
Acquisition costs (1)			(754	)			(2,764	)			(1,790	)			(6,371	)
Fair value changes in financial instruments			10,354				(3,946	)			18,394				(4,851	)
Fair value changes in business acquisition contingencies			(13	)			(143	)			(844	)			(385	)
Expenses related to financing transactions			(29	)			(41	)			(303	)			(280	)
Discontinued Specialty Lab			—				(96	)			—				(692	)
Other losses or expenses(2)			(343	)			(1,378	)			(1,554	)			(1,886	)
Income (loss) before expense from income taxes		$	15,659			$	(9,196	)		$	18,515			$	(29,611	)

__________________________

(1) Includes financial and tax diligence, consulting, legal, valuation, accounting, travel and acquisition-related incentives related to our acquisition and integration activity.

(2) The three months ended September 30, 2025 consist primarily of severance costs. The nine months ended September 30, 2025 consist primarily of the aforementioned severance costs, non-recurring costs incurred to restructure the Company's renewable energy business, third party expenses associated with the independent review and analysis of assertions in a short seller report regarding the Company, and costs to centralize certain back-office functions. The three and nine months ended September 30, 2024 consist primarily of non-recurring costs to centralize certain back-office functions. The nine months ended September 30, 2024 also include costs associated with a lease abandonment.

Schedule of Revenues by Geographic Location

The following table presents revenues by geographic location:

		For the Three Months Ended September 30,								For the Nine Months Ended September 30,
		2025				2024				2025				2024
United States		$	183,578			$	139,574			$	528,525			$	405,428
Canada			33,509				31,639				85,857				81,517
Other international			7,801				7,473				22,883				20,391
Total revenue		$	224,888			$	178,687			$	637,265			$	507,337

Schedule of Long-lived Assets by Geographic Location

The following table presents long-lived assets by geographic location:

		September 30,				December 31,
		2025				2024
United States		$	57,087			$	57,730
Canada			4,517				5,070
Other international			1,348				976
Total property and equipment—net		$	62,952			$	63,776

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