OPERATING SEGMENTS (Tables)

6 Months Ended

Jun. 30, 2017

OPERATING SEGMENTS

Summary of financial information of our reportable segments

	Three Months Ended June 30, 2017
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Treatment & Disposal Revenue	$	71,238	$	2,901	$	—	$	74,139
Services Revenue:
Transportation and Logistics (1)		18,353		4,943		—		23,296
Industrial Cleaning (2)		—		4,705		—		4,705
Technical Services (3)		—		19,802		—		19,802
Remediation (4)		—		3,217		—		3,217
Other (5)		—		898		—		898
Total Revenue	$	89,591	$	36,466	$	—	$	126,057
Depreciation, amortization and accretion	$	9,105	$	1,451	$	128	$	10,684
Capital expenditures	$	7,771	$	1,839	$	723	$	10,333
Total assets	$	608,207	$	124,466	$	56,773	$	789,446

	Three Months Ended June 30, 2016
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Treatment & Disposal Revenue	$	66,908	$	2,897	$	—	$	69,805
Services Revenue:
Transportation and Logistics (1)		15,889		4,955		—		20,844
Industrial Cleaning (2)		—		7,201		—		7,201
Technical Services (3)		—		19,167		—		19,167
Remediation (4)		—		4,653		—		4,653
Other (5)		—		681		—		681
Total Revenue	$	82,797	$	39,554	$	—	$	122,351
Depreciation, amortization and accretion	$	8,371	$	1,377	$	125	$	9,873
Capital expenditures	$	5,575	$	1,021	$	673	$	7,269
Total assets	$	591,511	$	127,836	$	58,905	$	778,252

	Six Months Ended June 30, 2017
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Treatment & Disposal Revenue	$	139,941	$	5,538	$	—	$	145,479
Services Revenue:
Transportation and Logistics (1)		30,953		10,263		—		41,216
Industrial Cleaning (2)		—		8,924		—		8,924
Technical Services (3)		—		35,464		—		35,464
Remediation (4)		—		3,823		—		3,823
Other (5)		—		1,385		—		1,385
Total Revenue	$	170,894	$	65,397	$	—	$	236,291
Depreciation, amortization and accretion	$	17,895	$	2,909	$	258	$	21,062
Capital expenditures	$	13,610	$	2,339	$	1,603	$	17,552
Total assets	$	608,207	$	124,466	$	56,773	$	789,446

	Six Months Ended June 30, 2016
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Treatment & Disposal Revenue	$	133,633	$	5,649	$	—	$	139,282
Services Revenue:
Transportation and Logistics (1)		30,688		10,343		—		41,031
Industrial Cleaning (2)		—		11,472		—		11,472
Technical Services (3)		—		36,772		—		36,772
Remediation (4)		—		5,490		—		5,490
Other (5)		—		1,622		—		1,622
Total Revenue	$	164,321	$	71,348	$	—	$	235,669
Depreciation, amortization and accretion	$	16,451	$	2,713	$	247	$	19,411
Capital expenditures	$	11,414	$	1,521	$	1,553	$	14,488
Total assets	$	591,511	$	127,836	$	58,905	$	778,252

(1) Includes such services as collection, transportation and disposal of non-hazardous and hazardous waste.

(2) Includes such services as industrial cleaning and maintenance for refineries, chemical plants, steel and automotive plants, and refinery services such as tank cleaning and temporary storage.

(3) Includes such services as Total Waste Management ("TWM") programs, retail services, laboratory packing, less-than-truck-load (“LTL”) service and Household Hazardous Waste ("HHW") collection.

(4) Includes such services as site assessment, onsite treatment, project management and remedial action planning and execution.

(5) Includes such services as emergency response and marine.

Reconciliation of Net Income to Adjusted EBITDA and adjusted EBITDA by operating segment

	Three Months Ended June 30,				Six Months Ended June 30,
$s in thousands	2017		2016		2017		2016
Net income	$	5,049	$	8,938	$	10,234	$	16,455
Income tax expense		2,718		5,866		5,797		10,550
Interest expense		8,474		4,303		12,604		8,862
Interest income		(21)		(33)		(31)		(82)
Foreign currency (gain) loss		(158)		343		(246)		(416)
Other income		(166)		(2,330)		(303)		(2,499)
Depreciation and amortization of plant and equipment		6,987		6,202		13,621		12,106
Amortization of intangibles		2,615		2,646		5,286		5,256
Stock-based compensation		1,043		783		1,959		1,578
Accretion and non-cash adjustment of closure & post-closure liabilities		1,082		1,025		2,155		2,049
Adjusted EBITDA	$	27,623	$	27,743	$	51,076	$	53,859

	Three Months Ended June 30,				Six Months Ended June 30,
$s in thousands	2017		2016		2017		2016
Adjusted EBITDA:
Environmental Services	$	34,642	$	33,551	$	66,498	$	66,604
Field & Industrial Services		4,119		5,123		6,183		8,801
Corporate		(11,138)		(10,931)		(21,605)		(21,546)
Total	$	27,623	$	27,743	$	51,076	$	53,859

Summary of revenues by geographic location

	Three Months Ended June 30,				Six Months Ended June 30,
$s in thousands	2017		2016		2017		2016
United States	$	110,763	$	111,183	$	206,955	$	214,374
Canada		15,294		11,168		29,336		21,295
Total revenue	$	126,057	$	122,351	$	236,291	$	235,669

Schedule of long-lived assets by geographic location

	June 30,		December 31,
$s in thousands	2017		2016
United States	$	403,448	$	405,767
Canada		56,636		54,826
Total long-lived assets	$	460,084	$	460,593