Exhibit

The following table sets forth certain financial information associated with our results of operations (unaudited, in thousands):



	Summary of Operations (in thousands)
	For the Three Months Ended
	March 31, 2016			June 30, 2016			September 30, 2016			December 31, 2016			March 31, 2015			June 30, 2015			September 30, 2015			December 31, 2015
Third-Party Revenues⁽¹⁾:
Technical Services	$	219,105		$	229,130		$	232,482		$	225,778		$	240,325		$	248,025		$	253,069		$	249,991
Industrial and Field Services	130,187			164,641			172,191			151,226			167,530			369,681			323,051			163,376
Safety-Kleen	246,961			277,715			297,082			288,969			257,491			274,980			272,659			255,796
Oil, Gas and Lodging Services	39,051			24,860			27,644			25,137			67,029			43,436			44,470			43,770
Corporate Items	779			1,164			121			1,003			124			106			117			111
Total	636,083			697,510			729,520			692,113			732,499			936,228			893,366			713,044
Direct Revenues⁽¹⁾:
Technical Services	$	254,337		$	265,375		$	271,769		$	265,254		$	276,526		$	287,422		$	288,394		$	286,738
Industrial and Field Services	123,499			156,416			161,292			141,008			160,558			358,603			315,836			154,956
Safety-Kleen	218,806			248,624			268,367			260,286			227,651			244,752			242,964			226,322
Oil, Gas and Lodging Services	39,507			26,375			28,537			25,464			69,040			46,149			46,366			45,584
Corporate Items	(66		)	720			(445		)	101			(1,276		)	(698		)	(194		)	(556		)
Total	636,083			697,510			729,520			692,113			732,499			936,228			893,366			713,044
Cost of Revenues⁽²⁾:
Technical Services	174,046			176,908			178,456			180,928			189,540			189,504			194,105			196,476
Industrial and Field Services	107,292			120,456			126,796			114,059			131,881			265,264			236,575			129,272
Safety-Kleen	147,429			160,598			163,770			173,478			172,754			156,835			161,034			158,694
Oil, Gas and Lodging Services	34,155			24,167			24,663			25,703			55,711			39,813			40,179			38,569
Corporate Items	1,357			(2,127		)	(1,770		)	2,493			(3,379		)	1,272			2,753			(46		)
Total	464,279			480,002			491,915			496,661			546,507			652,688			634,646			522,965
Selling, General and Administrative Expenses:
Technical Services	19,893			19,576			20,980			14,772			23,585			21,110			15,241			17,782
Industrial and Field Services	15,774			16,000			16,262			14,385			17,324			19,245			15,110			13,835
Safety-Kleen	31,322			32,792			34,544			32,604			32,124			30,898			29,711			27,377
Oil, Gas and Lodging Services	4,042			3,407			3,850			3,188			6,060			5,679			4,472			4,952
Corporate Items	33,453			35,288			35,318			34,565			28,622			43,486			28,579			28,972
Total	104,484			107,063			110,954			99,514			107,715			120,418			93,113			92,918
Adjusted EBITDA
Technical Services	60,398			68,891			72,333			69,554			63,401			76,808			79,048			72,480
Industrial and Field Services	433			19,960			18,234			12,564			11,353			74,094			64,151			11,849
Safety-Kleen	40,055			55,234			70,053			54,204			22,773			57,019			52,219			40,251
Oil, Gas and Lodging Services	1,310			(1,199		)	24			(3,427		)	7,269			657			1,715			2,063
Corporate Items	(34,876		)	(32,441		)	(33,993		)	(36,957		)	(26,519		)	(45,456		)	(31,526		)	(29,482		)
Total	$	67,320		$	110,445		$	126,651		$	95,938		$	78,277		$	163,122		$	165,607		$	97,161

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	For the Three Months Ended
	March 31, 2016			June 30, 2016		September 30, 2016			December 31, 2016			March 31, 2015			June 30, 2015		September 30, 2015		December 31, 2015
Net (loss) income	$	(20,871	)	$	3,966	$	(10,255	)	$	(12,713	)	$	(7,089	)	$	10,395	$	40,228	$	568
Accretion of environmental liabilities	2,505			2,548		2,476			2,648			2,619			2,599		2,577		2,607
Depreciation and amortization	68,902			73,393		73,360			71,347			68,356			67,773		69,060		69,005
Goodwill impairment charges	—			—		34,013			—			—			31,992		—		—
Other expense (income), net	350			189		198			(6,932		)	(409		)	660		139		990
Gain on sale of business	—			—		(16,431		)	(453		)	—			—		—		—
Interest expense, net	18,980			21,647		21,565			21,333			19,438			19,249		19,017		18,849
(Benefit) provision for income taxes	(2,546		)	8,702		21,725			20,708			(4,638		)	30,454		34,586		5,142
Adjusted EBITDA	$	67,320		$	110,445	$	126,651		$	95,938		$	78,277		$	163,122	$	165,607	$	97,161


(1)	Third party revenue billed to outside customers by a particular segment. Direct revenue is revenue allocated to the segment performing the provided service.


(2)	Cost of revenue is shown exclusive of items presented separately on the statements of operations, which consist of (i) accretion of environmental liabilities and (ii) depreciation and amortization.