OPERATING SEGMENTS (Tables)

6 Months Ended

Jun. 30, 2019

OPERATING SEGMENTS

Summary of financial information of our reportable segments

	Three Months Ended June 30, 2019
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	112,844	$	42,958	$	—	$	155,802
Depreciation, amortization and accretion	$	10,377	$	2,151	$	597	$	13,125
Capital expenditures	$	14,455	$	2,059	$	920	$	17,434
Total assets	$	725,311	$	167,985	$	68,120	$	961,416

	Three Months Ended June 30, 2018
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	98,960	$	37,952	$	—	$	136,912
Depreciation, amortization and accretion	$	8,676	$	1,415	$	330	$	10,421
Capital expenditures	$	4,935	$	1,849	$	618	$	7,402
Total assets	$	599,706	$	126,797	$	98,160	$	824,663

	Six Months Ended June 30, 2019
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	205,177	$	81,662	$	—	$	286,839
Depreciation, amortization and accretion	$	20,003	$	4,282	$	901	$	25,186
Capital expenditures	$	21,296	$	2,108	$	1,253	$	24,657
Total assets	$	725,311	$	167,985	$	68,120	$	961,416

	Six Months Ended June 30, 2018
			Field &
	Environmental		Industrial
$s in thousands	Services		Services		Corporate		Total
Revenue	$	185,431	$	71,540	$	—	$	256,971
Depreciation, amortization and accretion	$	17,186	$	2,770	$	446	$	20,402
Capital expenditures	$	10,939	$	2,887	$	1,134	$	14,960
Total assets	$	599,706	$	126,797	$	98,160	$	824,663

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	2019		2018		2019		2018
Net income	$	15,491	$	13,220	$	23,534	$	22,463
Income tax expense		6,395		4,258		9,436		7,778
Interest expense		3,588		2,907		7,618		5,716
Interest income		(202)		(39)		(409)		(63)
Foreign currency loss		384		139		523		153
Other income		(122)		(193)		(232)		(2,316)
Property and equipment impairment charges		—		—		25		—
Depreciation and amortization of plant and equipment		9,129		7,044		17,254		13,649
Amortization of intangible assets		2,863		2,296		5,674		4,598
Share-based compensation		1,245		1,011		2,467		2,079
Accretion and non-cash adjustment of closure & post-closure liabilities		1,133		1,081		2,258		2,155
Property insurance recoveries		(4,500)		—		(9,153)		—
Adjusted EBITDA	$	35,404	$	31,724	$	58,995	$	56,212

Adjusted EBITDA, by operating segment, is as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
$s in thousands	2019		2018		2019		2018
Adjusted EBITDA:
Environmental Services	$	47,056	$	39,860	$	82,316	$	74,532
Field & Industrial Services		5,022		4,562		7,576		6,907
Corporate		(16,674)		(12,698)		(30,897)		(25,227)
Total	$	35,404	$	31,724	$	58,995	$	56,212

Schedule of long-lived assets by geographic location

	June 30,		December 31,
$s in thousands	2019		2018
United States	$	481,301	$	480,322
Canada		59,185		57,787
Total long-lived assets	$	540,486	$	538,109