OPERATING SEGMENTS (Tables)

9 Months Ended

Sep. 30, 2018

OPERATING SEGMENTS

Summary of financial information of our reportable segments

Summarized financial information of our reportable segments is as follows:

	Three Months Ended September 30, 2018
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	107,197	$	44,219	$	—	$	151,416
Depreciation, amortization and accretion	$	8,903	$	1,537	$	316	$	10,756
Capital expenditures	$	9,878	$	573	$	379	$	10,830
Total assets	$	614,228	$	157,989	$	80,957	$	853,174

	Three Months Ended September 30, 2017
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	97,661	$	36,393	$	—	$	134,054
Depreciation, amortization and accretion	$	9,342	$	1,316	$	118	$	10,776
Capital expenditures	$	7,594	$	561	$	647	$	8,802
Total assets	$	619,156	$	124,053	$	59,442	$	802,651

	Nine Months Ended September 30, 2018
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	292,628	$	115,759	$	—	$	408,387
Depreciation, amortization and accretion	$	26,089	$	4,307	$	762	$	31,158
Capital expenditures	$	20,818	$	3,460	$	1,513	$	25,791
Total assets	$	614,228	$	157,989	$	80,957	$	853,174

	Nine Months Ended September 30, 2017
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	268,555	$	101,790	$	—	$	370,345
Depreciation, amortization and accretion	$	27,238	$	4,225	$	375	$	31,838
Capital expenditures	$	21,204	$	2,900	$	2,250	$	26,354
Total assets	$	619,156	$	124,053	$	59,442	$	802,651

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

	Three Months Ended September 30,				Nine Months Ended September 30,
$s in thousands	2018		2017		2018		2017
Net income	$	13,427	$	8,365	$	35,890	$	18,599
Income tax expense		3,400		4,668		11,178		10,465
Interest expense		3,066		2,783		8,782		15,387
Interest income		(34)		(18)		(97)		(49)
Foreign currency (gain) loss		303		(275)		456		(521)
Other income		(177)		(234)		(2,493)		(537)
Impairment charges		3,666		—		3,666		—
Depreciation and amortization of plant and equipment		7,342		7,386		20,991		21,007
Amortization of intangibles		2,327		2,300		6,925		7,586
Stock-based compensation		1,193		995		3,272		2,954
Accretion and non-cash adjustment of closure & post-closure liabilities		1,087		1,090		3,242		3,245
Adjusted EBITDA	$	35,600	$	27,060	$	91,812	$	78,136

	Three Months Ended September 30,				Nine Months Ended September 30,
$s in thousands	2018		2017		2018		2017
Adjusted EBITDA:
Environmental Services	$	43,210	$	35,524	$	117,742	$	102,022
Field & Industrial Services		6,236		3,646		13,143		9,829
Corporate		(13,846)		(12,110)		(39,073)		(33,715)
Total	$	35,600	$	27,060	$	91,812	$	78,136

Schedule of long-lived assets by geographic location

	September 30,		December 31,
$s in thousands	2018		2017
United States	$	402,923	$	396,066
Canada		60,468		61,178
Total long-lived assets	$	463,391	$	457,244