10-Q

UNITED STATES OF AMERICA

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

_______________________

FORM 10-Q

x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
FOR THE QUARTERLY PERIOD ENDED September 30, 2016
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM         TO       

Commission File Number 001-34223

_______________________

CLEAN HARBORS, INC.

(Exact name of registrant as specified in its charter)

Massachusetts	04-2997780
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification No.)
42 Longwater Drive, Norwell, MA	02061-9149
(Address of Principal Executive Offices)	(Zip Code)

(781) 792-5000

(Registrant’s Telephone Number, Including area code)

_______________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes  x  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer x	Accelerated filer o
Non-accelerated filer o	Smaller reporting company o
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act). Yes o  No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock, $.01 par value	57,392,673
(Class)	(Outstanding as of October 31, 2016)

CLEAN HARBORS, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

	Page No.
PART I: FINANCIAL INFORMATION
ITEM 1: Unaudited Financial Statements
Consolidated Balance Sheets	1
Unaudited Consolidated Statements of Operations	2
Unaudited Consolidated Statements of Comprehensive (Loss) Income	3
Unaudited Consolidated Statements of Cash Flows	4
Unaudited Consolidated Statements of Stockholders’ Equity	5
Notes to Unaudited Consolidated Financial Statements	6
ITEM 2: Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
ITEM 3: Quantitative and Qualitative Disclosures About Market Risk	47
ITEM 4: Controls and Procedures	48
PART II: OTHER INFORMATION
ITEM 1: Legal Proceedings	49
ITEM 1A: Risk Factors	49
ITEM 2: Unregistered Sales of Equity Securities and Use of Proceeds	49
ITEM 3: Defaults Upon Senior Securities	49
ITEM 4: Mine Safety Disclosures	49
ITEM 5: Other Information	49
ITEM 6: Exhibits	50
Signatures	51

CLEAN HARBORS, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in thousands)

	September 30, 2016			December 31, 2015
ASSETS	(unaudited)
Current assets:
Cash and cash equivalents	$	257,857		$	184,708
Accounts receivable, net of allowances aggregating $28,782 and $31,426, respectively	512,376			496,004
Unbilled accounts receivable	41,542			25,940
Deferred costs	19,970			18,758
Inventories and supplies	177,288			149,521
Prepaid expenses and other current assets	40,898			46,265
Total current assets	1,049,931			921,196
Property, plant and equipment, net	1,648,571			1,532,467
Other assets:
Deferred financing costs	1,197			1,847
Goodwill	470,633			453,105
Permits and other intangibles, net	507,337			506,818
Other	34,944			15,995
Total other assets	1,014,111			977,765
Total assets	$	3,712,613		$	3,431,428
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	226,776		$	241,183
Deferred revenue	66,023			61,882
Accrued expenses	226,080			193,660
Current portion of closure, post-closure and remedial liabilities	20,217			20,395
Total current liabilities	539,096			517,120
Other liabilities:
Closure and post-closure liabilities, less current portion of $6,057 and $7,229, respectively	56,510			49,020
Remedial liabilities, less current portion of $14,160 and $13,166, respectively	114,921			118,826
Long-term obligations	1,632,577			1,382,543
Deferred taxes, unrecognized tax benefits and other long-term liabilities	268,564			267,637
Total other liabilities	2,072,572			1,818,026
Commitments and contingent liabilities (See Note 15)
Stockholders’ equity:
Common stock, $.01 par value:
Authorized 80,000,000; shares issued and outstanding 57,389,531 and 57,593,201 shares, respectively	574			576
Shares held under employee participation plan	(469		)	(469		)
Additional paid-in capital	726,878			738,401
Accumulated other comprehensive loss	(211,544		)	(254,892		)
Accumulated earnings	585,506			612,666
Total stockholders’ equity	1,100,945			1,096,282
Total liabilities and stockholders’ equity	$	3,712,613		$	3,431,428

The accompanying notes are an integral part of these unaudited consolidated financial statements.

1

CLEAN HARBORS, INC. AND SUBSIDIARIES

UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands except per share amounts)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Revenues:
Service revenues	$	594,225		$	760,667		$	1,709,018		$	2,158,344
Product revenues	135,295			132,699			354,095			403,749
Total revenues	729,520			893,366			2,063,113			2,562,093
Cost of revenues (exclusive of items shown separately below)
Service revenues	385,542			523,676			1,148,212			1,484,936
Product revenues	106,373			110,970			287,984			348,905
Total cost of revenues	491,915			634,646			1,436,196			1,833,841
Selling, general and administrative expenses	110,954			93,113			322,501			321,246
Accretion of environmental liabilities	2,476			2,577			7,529			7,795
Depreciation and amortization	73,360			69,060			215,655			205,189
Goodwill impairment charge	34,013			—			34,013			31,992
Income from operations	16,802			93,970			47,219			162,030
Other expense	(198		)	(139		)	(737		)	(390		)
Gain on sale of business	16,431			—			16,431			—
Interest expense, net of interest income of $196, $126, $571 and $465, respectively	(21,565		)	(19,017		)	(62,192		)	(57,704		)
Income before provision for income taxes	11,470			74,814			721			103,936
Provision for income taxes	21,725			34,586			27,881			60,402
Net (loss) income	$	(10,255	)	$	40,228		$	(27,160	)	$	43,534
(Loss) earnings per share:
Basic	$	(0.18	)	$	0.69		$	(0.47	)	$	0.74
Diluted	$	(0.18	)	$	0.69		$	(0.47	)	$	0.74
Shares used to compute (loss) earnings per share - Basic	57,487			58,161			57,575			58,799
Shares used to compute (loss) earnings per share - Diluted	57,487			58,268			57,575			58,898

The accompanying notes are an integral part of these unaudited consolidated financial statements.

2

CLEAN HARBORS, INC. AND SUBSIDIARIES

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in thousands)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Net (loss) income	$	(10,255	)	$	40,228		$	(27,160	)	$	43,534
Other comprehensive (loss) income:
Unrealized losses on available-for-sale securities (net of taxes of $238, $0, $238 and $0, respectively)	(164		)	—			(358		)	—
Foreign currency translation adjustments	(1,147		)	(53,541		)	43,706			(118,713		)
Other comprehensive (loss) income	(1,311		)	(53,541		)	43,348			(118,713		)
Comprehensive (loss) income	$	(11,566	)	$	(13,313	)	$	16,188		$	(75,179	)

The accompanying notes are an integral part of these unaudited consolidated financial statements.

3

CLEAN HARBORS, INC. AND SUBSIDIARIES

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Nine Months Ended
	September 30,
	2016			2015
Cash flows from operating activities:
Net (loss) income	$	(27,160	)	$	43,534
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	215,655			205,189
Goodwill impairment charge	34,013			31,992
Allowance for doubtful accounts	6,203			5,631
Amortization of deferred financing costs and debt discount	2,685			2,459
Accretion of environmental liabilities	7,529			7,795
Changes in environmental liability estimates	(349		)	(2,200		)
Deferred income taxes	(28,826		)	(18,994		)
Stock-based compensation	7,735			6,550
Excess tax benefit of stock-based compensation	(21		)	(102		)
Net tax deficiency on stock based awards	(642		)	(78		)
Other expense	1,247			390
Gain on sale of business	(16,431		)	—
Environmental expenditures	(9,374		)	(16,773		)
Changes in assets and liabilities, net of acquisitions
Accounts receivable and unbilled accounts receivable	(32,944		)	(63,222		)
Inventories and supplies	(13,722		)	14,708
Other current assets	5,619			18,706
Accounts payable	(11,951		)	47,051
Other current and long-term liabilities	39,561			26,957
Net cash from operating activities	178,827			309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	(175,348		)	(189,999		)
Proceeds from sales of fixed assets	3,982			3,740
Acquisitions, net of cash acquired	(207,089		)	(79,610		)
Proceeds on sale of business, net of cash	47,134			—
Additions to intangible assets, including costs to obtain or renew permits	(1,920		)	(4,633		)
Purchases of available-for-sale securities	(598		)	—
Net cash used in investing activities	(333,839		)	(270,502		)
Cash flows from (used in) financing activities:
Change in uncashed checks	(7,084		)	(21,882		)
Proceeds from exercise of stock options	230			397
Issuance of restricted shares, net of shares remitted	(2,500		)	(2,027		)
Repurchases of common stock	(15,869		)	(69,155		)
Deferred financing costs paid	(2,614		)	—
Payments on capital leases	—			(500		)
Excess tax benefit of stock-based compensation	21			102
Issuance of senior secured notes, including premium	250,625			—
Net cash from (used in) financing activities	222,809			(93,065		)
Effect of exchange rate change on cash	5,352			(13,714		)
Increase (decrease) in cash and cash equivalents	73,149			(67,688		)
Cash and cash equivalents, beginning of period	184,708			246,879
Cash and cash equivalents, end of period	$	257,857		$	179,191
Supplemental information:
Cash payments for interest and income taxes:
Interest paid	$	66,261		$	58,613
Income taxes paid	27,196			32,276
Non-cash investing and financing activities:
Accrual for repurchased shares	479			658
Property, plant and equipment accrued	18,181			29,549
Receivable for estimated purchase price adjustment	1,910			2,518

The accompanying notes are an integral part of these unaudited consolidated financial statements.

4

CLEAN HARBORS, INC. AND SUBSIDIARIES

UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands)

	Common Stock					Shares Held Under Employee Participation Plan						Accumulated Other Comprehensive Loss
	Number of Shares		$ 0.01 Par Value						Additional Paid-in Capital						Accumulated Earnings			Total Stockholders’ Equity
Balance at January 1, 2016	57,593		$	576		$	(469	)	$	738,401		$	(254,892	)	$	612,666		$	1,096,282
Net loss	—		—			—			—			—			(27,160		)	(27,160		)
Other comprehensive income	—		—			—			—			43,348			—			43,348
Stock-based compensation	—		—			—			7,735			—			—			7,735
Issuance of restricted shares, net of shares remitted	124		1			—			(2,501		)	—			—			(2,500		)
Repurchases of common stock	(337	)	(3		)	—			(16,345		)	—			—			(16,348		)
Exercise of stock options	10		—			—			230			—			—			230
Net tax deficiency on stock based awards	—		—			—			(642		)	—			—			(642		)
Balance at September 30, 2016	57,390		$	574		$	(469	)	$	726,878		$	(211,544	)	$	585,506		$	1,100,945

The accompanying notes are an integral part of these unaudited consolidated financial statements.

5

CLEAN HARBORS, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

(1) BASIS OF PRESENTATION

The accompanying consolidated interim financial statements are unaudited and include the accounts of Clean Harbors, Inc. and its subsidiaries (collectively, “Clean Harbors,” the “Company” or "we") and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and, in the opinion of management, include all adjustments which are of a normal recurring nature, necessary for a fair presentation of the financial position, results of operations, and cash flows for the periods presented. Management has made estimates and assumptions affecting the amounts reported in the Company's consolidated interim financial statements and accompanying footnotes, actual results could differ from those estimates and judgments. The results for interim periods are not necessarily indicative of results for the entire year or any other interim periods. The financial statements presented herein should be read in connection with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, which includes the audited consolidated balance sheet as of December 31, 2015 from which the one presented herein was derived.

(2) SIGNIFICANT ACCOUNTING POLICIES

The Company's significant accounting policies are described in Note 2, "Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. There have been no material changes in these policies or their application.

Recent Accounting Pronouncements

Standards implemented

In February 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2015-02, Consolidation (Topic 810). The amendment provides guidance regarding amendments to the consolidation analysis. The adoption of ASU 2015-02 as of January 1, 2016 did not have an impact on the Company's consolidated financial statements.

In September 2015, FASB issued ASU 2015-16, Business Combinations (Topic 805). The amendment provides guidance to simplify the accounting for adjustments made to provisional amounts recognized in a business combination. This amendment eliminates the requirement to retrospectively account for those adjustments. ASU 2015-16 is applied prospectively to adjustments to provisional amounts that occur after the effective date of this update. The adoption of ASU 2015-16 as of January 1, 2016 did not have a material impact on the Company's consolidated financial statements.

Standards to be implemented

The Company is currently evaluating the impact that the below standards to be implemented will have on the Company's consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases (Topic 842). The amendment increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 should be applied using a modified retrospective approach and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2018.

In March 2016, FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606). ASU 2016-08 reduces the potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718). The amendment simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 allows for retrospective or prospective application and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016.

6

In April 2016, FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). ASU 2016-10 reduces the potential for diversity in initial application, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In May 2016, FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606). ASU 2016-12 provided narrow scope improvements and practical expedients on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force). The amendment provides updated guidance on eight specific cash flow issues, including debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from settlement of insurance claims and corporate-owned life insurance, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. Early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2017.

(3) BUSINESS COMBINATIONS

2016 Acquisitions

During the first nine months of 2016, the Company acquired seven businesses that will primarily complement the strategy to create a direct sales model as it relates to the sale of the Company's oil products. These acquisitions provided the Company two additional oil re-refineries while also expanding its used motor oil collection network and providing greater blending and packaging capabilities. These acquisitions provide the Company with greater access to customers in the West Coast region of the United States and additional locations with Part B permits. Operations of these acquisitions are primarily being integrated across the SK Environmental Services and Kleen Performance Products segments with certain operations also being integrated into the Technical Services and Industrial and Field Services segments.

The combined purchase price for the seven acquisitions was approximately $205.2 million paid in cash and subject to customary post-closing adjustments. The combined amount of direct revenue from the acquisitions included in the Company's results of operations for each of the three and nine months ended September 30, 2016 was approximately $26.0 million and $38.1 million, respectively. During the three and nine months ended September 30, 2016, the Company incurred acquisition-related costs of approximately $0.7 million and $1.2 million, respectively, in connection with the transactions which are included in selling, general and administrative expenses in the consolidated statements of operations.

7

    The allocation of the purchase price was based on preliminary estimates of the fair value of assets acquired and liabilities assumed as of the acquisition dates. Given the recent timing of these transactions, the Company is continuing to obtain information to complete its valuation of these accounts and the associated tax accounting. The components and preliminary allocation of the purchase price consist of the following amounts (in thousands):

	At Acquisition Dates			Measurement Period Adjustments			At Acquisition Dates As Reported September 30, 2016
Accounts receivable	$	17,384		$	(1,016	)	$	16,368
Inventories and supplies	13,859			(1,071		)	12,788
Prepaid expenses and other current assets	920			9			929
Property, plant and equipment	132,705			(1,843		)	130,862
Permits and other intangibles	23,405			3,651			27,056
Deferred tax assets	855			(2		)	853
Current liabilities	(19,486		)	(438		)	(19,924		)
Closure and post-closure liabilities	(1,709		)	(699		)	(2,408		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(9,518		)	(1,894		)	(11,412		)
Total identifiable net assets	158,415			(3,303		)	155,112
Goodwill	48,674			1,393			50,067
Total purchase price, net of cash acquired	$	207,089		$	(1,910	)	$	205,179

Pro forma revenue and earnings amounts on a combined basis as if these acquisitions had been completed on January 1, 2015 are immaterial to the consolidated financial statements of the Company since that date.

2015 Acquisitions

Thermo Fluids Inc.

On April 11, 2015, the Company completed the acquisition of Heckmann Environmental Services, Inc. (“HES”) and Thermo Fluids Inc. (“TFI”), a wholly-owned subsidiary of HES. The acquisition was accomplished through a purchase by Safety-Kleen, Inc., a wholly-owned subsidiary of the Company, of all of the issued and outstanding shares of HES from Nuverra Environmental Solutions, Inc. HES is a holding company that does not conduct any operations. TFI provides environmental services, including used oil recycling, used oil filter recycling, antifreeze products, parts washers and solvent recycling, and industrial waste management services, including vacuum services, remediation, lab pack and hazardous waste management. The Company acquired TFI for a purchase price of $79.3 million. The acquisition was financed with cash on hand and expands the Company’s environmental services customer base while also complimenting the SK Environmental Services network and presence in the western United States. Results of TFI since acquisition have been included within the SK Environmental Services segment.

The allocation of the purchase price was based on estimates of the fair value of assets acquired and liabilities assumed as of April 11, 2015. The Company believes that such information provides a reasonable basis for estimating the fair values of assets acquired and liabilities assumed. The Company finalized the purchase accounting for the acquisition of TFI in the second quarter of 2016.

8

The following table summarizes the recognized amounts of assets acquired and liabilities assumed at April 11, 2015 (in thousands):

	Preliminary Allocations			Measurement Period Adjustments			Final Allocations
Accounts receivable	$	7,109		$	192		$	7,301
Inventories and supplies	1,791			—			1,791
Prepaid and other current assets	1,749			(1,084		)	665
Property, plant and equipment	30,468			(2,827		)	27,641
Permits and other intangibles	20,000			(1,900		)	18,100
Current liabilities	(5,859		)	(25		)	(5,884		)
Closure and post-closure liabilities	(1,676		)	(657		)	(2,333		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(13,081		)	3,907			(9,174		)
Total identifiable net assets	40,501			(2,394		)	38,107
Goodwill	36,591			4,638			41,229
Total purchase price, net of cash acquired	$	77,092		$	2,244		$	79,336

Pro forma revenue and earnings amounts on a combined basis as if TFI had been acquired on January 1, 2015 are immaterial to the consolidated financial statements of the Company since that date.

Other 2015 Acquisition

In December 2015, the Company acquired certain assets and assumed certain defined liabilities of a privately owned company for approximately $14.7 million in cash. That company specializes in the collection and recycling of used oil filters and was a service provider to the SK Environmental Services segment prior to the acquisition. The acquired assets have been integrated into the SK Environmental Services segment. In connection with this acquisition a preliminary goodwill amount of $7.4 million was recognized.

(4) DISPOSITION OF BUSINESS

On September 1, 2016, the Company completed the sale of its Catalyst Services business, which was a non-core business previously included within the Industrial and Field Services segment, for approximately $50.1 million ($48.6 million net of cash divested) subject to customary post-closing conditions. As a result of the sale, the Company recognized during the three and nine months ended September 30, 2016 a pre-tax gain of $16.4 million which is included in gain on sale of business in the Company’s consolidated statement of operations. Inclusive within this gain was $1.5 million of transactional related costs.

The following table presents the carrying amounts of the Company's Catalyst Services business immediately preceding the disposition on September 1, 2016, in thousands:

	September 1, 2016
Total current assets	$	19,135
Property, plant and equipment, net	11,126
Total other assets	6,500
Total assets divested	$	36,761
Total current liabilities	4,040
Total other liabilities	566
Total liabilities divested	$	4,606
Net carrying value divested	$	32,155

9

The Company evaluated the disposition and determined it did not meet the “major effect” criteria for classification as a discontinued operation largely due to the nature and size of the operations of the disposed of entity. However, the Company determined that the disposition does represent an individually significant component of the Company's business. The following table presents (loss) income attributable to the Catalyst Services business included in the Company's consolidated results of operations for each of the periods shown and through its disposition on September 30, 2016, in thousands:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
	2016		2015	2016	2015
(Loss) income before provision for income taxes	(1,218	)	1,089	290	2,489

(5) INVENTORIES AND SUPPLIES

Inventories and supplies consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Oil and oil products	$	57,403	$	33,603
Supplies and drums	84,133		78,132
Solvent and solutions	8,502		8,868
Modular camp accommodations	15,492		15,126
Other	11,758		13,792
Total inventories and supplies	$	177,288	$	149,521

The increase in oil and oil products as of September 30, 2016 as compared to December 31, 2015 was a result of the Company's recent acquisitions and implementation of its closed loop direct sales model. As of September 30, 2016 and December 31, 2015, other inventories consisted primarily of cleaning fluids, such as absorbents and wipers, and automotive fluids, such as windshield washer fluid and antifreeze.

(6) PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Land	$	122,337	$	100,582
Asset retirement costs (non-landfill)	14,590		12,434
Landfill assets	142,587		136,624
Buildings and improvements	379,435		344,209
Camp equipment	156,838		149,361
Vehicles	535,804		500,619
Equipment	1,465,378		1,328,915
Furniture and fixtures	5,546		5,337
Construction in progress	147,569		113,657
	2,970,084		2,691,738
Less - accumulated depreciation and amortization	1,321,513		1,159,271
Total property, plant and equipment, net	$	1,648,571	$	1,532,467

Interest in the amount of $1.5 million and $4.0 million was capitalized to fixed assets during the three and nine months ended September 30, 2016, respectively. Interest in the amount of $0.6 million and $1.2 million was capitalized to fixed assets during the three and nine months ended September 30, 2015, respectively. Depreciation expense, inclusive of landfill amortization, was $62.6 million and $185.4 million for the three and nine months ended September 30, 2016, respectively. Depreciation expense, inclusive of landfill amortization, was $59.2 million and $175.5 million for the three and nine months ended September 30, 2015, respectively.

10

(7) GOODWILL AND OTHER INTANGIBLE ASSETS

The changes in goodwill for the nine months ended September 30, 2016 were as follows (in thousands):

	Technical Services			Industrial & Field Services			Kleen Performance Products		SK Environmental Services		Lodging Services			Oil and Gas Field Services		Totals
Balance at January 1, 2016	$	49,267		$	105,286		$	49,755	$	216,589	$	32,208		$	—	$	453,105
Acquired from current period acquisitions	8,989			4,925			18,629		17,524		—			—		50,067
Measurement period adjustment from prior period acquisitions	—			—			—		2,095		—			—		2,095
Decrease from disposition of business	—			(4,994		)	—									(4,994		)
Goodwill impairment charge											(34,013		)			(34,013		)
Foreign currency translation and other	(619		)	1,132			98		1,957		1,805			—		4,373
Balance at September 30, 2016	$	57,637		$	106,349		$	68,482	$	238,165	$	—		$	—	$	470,633

The Company assesses goodwill for impairment on an annual basis as of December 31, or at an interim date when events or changes in the business environment would more likely than not reduce the fair value of a reporting unit below its carrying value. The Company conducted the annual impairment test of goodwill for all reporting units as of December 31, 2015 and determined that no adjustment to the carrying value of goodwill for any reporting units was necessary because the fair value of each of the reporting units exceeded that reporting unit's respective carrying value.

As disclosed in the Company’s quarterly report on Form 10-Q for the period ended June 30, 2016, the Company noted that its Lodging reporting unit has been negatively impacted by persistently weak oil and gas prices that have negatively impacted the Western Canadian energy market and that if these economic difficulties persisted, future impairments might be required. During the first and second quarters of 2016, the Company evaluated the reporting unit’s performance along with other business specific and macroeconomic factors and concluded that no interim impairment test was necessary.

During the quarter ended September 30, 2016 certain events and changes in circumstances arose which led management to conclude that the fair value of the Lodging reporting unit was more likely than not less than its carrying value, and therefore an interim goodwill impairment test was performed. The primary events and changes in circumstances which led to this conclusion were:

• Macroeconomic conditions for service companies operating in western Canada’s oil sands region deteriorated in 2016 primarily due to persistently low oil and gas prices. Persistently low prices have caused Lodging’s primary customers to significantly reduce, defer, or cancel oil and gas projects that are in, or had been planned for, this region during periods of more robust commodity pricing.

• Government regulatory delays related to oil and gas pipeline projects have reduced management’s confidence that these projects will move forward in a timely manner or in the form that had been originally contemplated by their planners. These projects represented a significant portion of Lodging’s future growth in terms of the demand for temporary accommodations provided by the Lodging reporting unit. While some of these projects have made recent advancements towards successful government approval, the lack of meaningful progress to date does not provide enough positive evidence that a recovery will be significant enough to improve Lodging’s current forecasted outlook.

• There have been consecutive historical quarters where business results were significantly less than internal forecasts, and previous actual results, for the Lodging reporting unit.

• During the third quarter ended September 30, 2016, management’s near term outlook was clarified in regards to the business’ projections and the impacts of large scale forest fires which took place in the Fort McMurray area of Alberta, Canada where the Company has significant Lodging operations.

• Due to the factors listed above, management significantly lowered its 2016 forecasts and long-range performance relative to the Lodging reporting unit.

11

In performing Step I of the interim goodwill impairment test, the estimated fair value of the Lodging reporting unit was determined using an income approach with discounted cash flows which were compared to the reporting unit’s carrying value as of September 30, 2016. Based on the results of that evaluation, the carrying amount of the reporting unit, including $34.0 million of goodwill, exceeded Lodging’s estimated fair value and as a result the Company performed Step II of the goodwill impairment test to determine the amount of goodwill impairment that would need to be recognized.

Step II of the goodwill impairment test required the Company to perform a theoretical purchase price allocation for Lodging to determine the implied fair value of its goodwill and then compare that implied fair value to its recorded amount. Estimates and assumptions were used to determine the fair values for Lodging’s long-lived assets in Step II and these involved the use of significant professional judgment on the part of management. The classes of assets that were affected by these estimates and assumptions related most significantly to property, plant, and equipment, goodwill, and intangible assets. Based on the results of this test the implied fair value of goodwill was determined to be $0. Accordingly, the Company recognized a goodwill impairment charge equal to its recorded amount, or $34.0 million, as of September 30, 2016.

The factors contributing to the $34.0 million goodwill impairment charge principally related to events and changes in circumstances discussed above which negatively impacted the Company’s prospective financial information in its discounted cash flow model and the reporting unit's estimated fair value. Lower levels of pricing and an unfavorable change in product mix that reduced expected profit became evident during the third quarter ended September 30, 2016 as management updated the Company's long term projections for the business and as a result decreased the reporting unit’s anticipated future cash flows as compared to those estimated previously. These factors also provided evidence of a longer than expected recovery from current industry lows, which negatively impacted the estimated levels of cash flows in future periods that are assumed in the cash flow model. These factors adversely affected the estimated fair value of the reporting unit and ultimately led to the recognition of the goodwill impairment charge.

As a result of the sale of the Catalyst Services business discussed in Note 4, "Disposition of Business" to the accompanying financial statements, a step 1 goodwill impairment test was also performed relative to the remaining goodwill of $25.1 million in the Industrial Services reporting unit. The results of this test indicated that no impairment of the goodwill exists as of September 30, 2016.

Significant judgments and unobservable inputs categorized as Level III in the fair value hierarchy are inherent in the impairment tests performed and include assumptions about the amount and timing of expected future cash flows, growth rates, and the determination of appropriate discount rates. The Company believes that the assumptions used in its annual and any interim date impairment tests are reasonable, but variations in any of the assumptions may result in different calculations of fair values and impairment charges.

The Company also performed an analysis to determine whether the carrying values of the Lodging segment's finite-lived intangible and other long lived assets may not be entirely recoverable. As of September 30, 2016, the Lodging reporting unit had property, plant and equipment of $99.8 million and other intangible assets of $6.0 million. Based on the analysis performed, sufficient future cash flows are anticipated over those assets' remaining lives to demonstrate recoverability. Thus no impairment charge was recorded related to those other long lived assets.

12

As of September 30, 2016 and December 31, 2015, the Company's total finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):

	September 30, 2016							December 31, 2015
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	170,194	$	66,510	$	103,684	20.3	$	161,396	$	61,142	$	100,254	19.0
Customer and supplier relationships	389,002		120,922		268,080		12.5	374,866		99,463		275,403		10.1
Other intangible assets	40,266		27,548		12,718		7.8	31,416		22,581		8,835		1.5
Total amortizable permits and other intangible assets	599,462		214,980		384,482		14.4	567,678		183,186		384,492		10.0
Trademarks and trade names	122,855		—		122,855		Indefinite	122,326		—		122,326		Indefinite
Total permits and other intangible assets	$	722,317	$	214,980	$	507,337		$	690,004	$	183,186	$	506,818

Amortization expense of permits and other intangible assets was $10.8 million and $30.3 million for the three and nine months ended September 30, 2016, respectively. Amortization expense of permits and other intangible assets was $9.9 million and $29.7 million for the three and nine months ended September 30, 2015, respectively.

The expected amortization of the net carrying amount of finite-lived intangible assets at September 30, 2016 was as follows (in thousands):

Years Ending December 31,	Expected Amortization
2016 (three months)	$	9,533
2017	35,325
2018	32,345
2019	29,612
2020	27,316
Thereafter	250,351
	$	384,482

(8) ACCRUED EXPENSES

Accrued expenses consisted of the following at September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016		December 31, 2015
Insurance	$	59,254	$	55,899
Interest	21,859		20,500
Accrued compensation and benefits	46,921		35,646
Income, real estate, sales and other taxes	60,020		37,095
Other	38,026		44,520
	$	226,080	$	193,660

13

(9) CLOSURE AND POST-CLOSURE LIABILITIES

The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2016 through September 30, 2016 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2016	$	32,023		$	24,226		$	56,249
Liabilities assumed in acquisitions	—			2,408			2,408
Adjustments during the measurement period related to 2015 acquisitions	—			657			657
New asset retirement obligations	1,650			—			1,650
Accretion	1,996			1,748			3,744
Changes in estimates recorded to statement of operations	(597		)	(114		)	(711		)
Expenditures	(904		)	(709		)	(1,613		)
Currency translation and other	130			53			183
Balance at September 30, 2016	$	34,298		$	28,269		$	62,567

All of the landfill facilities included in the above were active as of September 30, 2016. There were no significant charges (benefits) in 2016 resulting from changes in estimates for closure and post-closure liabilities.

New asset retirement obligations incurred during the first nine months of 2016 were discounted at the credit-adjusted risk-free rate of 6.23%.

(10) REMEDIAL LIABILITIES

The changes to remedial liabilities for the nine months ended September 30, 2016 were as follows (in thousands):

	Remedial Liabilities for Landfill Sites			Remedial Liabilities for Inactive Sites			Remedial Liabilities (Including Superfund) for Non-Landfill Operations			Total
Balance at January 1, 2016	$	2,327		$	63,613		$	66,052		$	131,992
Liabilities assumed in acquisition	—			—			4			4
Accretion	82			2,049			1,654			3,785
Changes in estimates recorded to statement of operations	71			(448		)	739			362
Expenditures	(88		)	(2,957		)	(4,716		)	(7,761		)
Currency translation and other	—			45			654			699
Balance at September 30, 2016	$	2,392		$	62,302		$	64,387		$	129,081

In the nine months ended September 30, 2016, there were no significant charges (benefits) resulting from changes in estimates for remedial liabilities.

(11) FINANCING ARRANGEMENTS

The following table is a summary of the Company’s financing arrangements (in thousands):

	September 30, 2016			December 31, 2015
Senior unsecured notes, at 5.25%, due August 1, 2020 ("2020 Notes")	$	800,000		$	800,000
Senior unsecured notes, at 5.125%, due June 1, 2021 ("2021 Notes")	845,000			595,000
Long-term obligations, at par	$	1,645,000		$	1,395,000
Unamortized debt issuance costs and premium, net	(12,423		)	(12,457		)
Long-term obligations, at carrying value	$	1,632,577		$	1,382,543

At September 30, 2016 and December 31, 2015, the fair value of the Company's 2020 Notes was $824.0 million and $812.0 million, respectively, based on quoted market prices for the instrument. The fair value of the 2020 Notes is considered a Level 2 measure according to the fair value hierarchy.

14

On March 14, 2016, the Company issued $250.0 million aggregate principal amount as additional notes under the indenture pursuant to which the Company previously issued on December 7, 2012 $600.0 million aggregate principal amount of 2021 Notes. Interest payments are paid semi-annually on June 1 and December 1 of each year. At September 30, 2016 and December 31, 2015, the fair value of the Company's 2021 Notes was $866.1 million and $599.5 million, respectively, based on quoted market prices for the instrument. The fair value of the 2021 Notes is considered a Level 2 measure according to the fair value hierarchy.

The Company also maintains a revolving credit facility which as of September 30, 2016 and December 31, 2015, had no outstanding loan balances. At September 30, 2016, $201.4 million was available to borrow and outstanding letters of credit were $142.0 million. At December 31, 2015, $178.5 million was available to borrow and outstanding letters of credit were $144.6 million.

The revolving credit facility is guaranteed by all of Clean Harbors, Inc.'s ("Parent's") domestic subsidiaries and secured by substantially all of the Parent’s and its domestic subsidiaries’ assets. Available credit for Parent and its domestic subsidiaries is generally limited to 85% of their eligible accounts receivable and 100% of their cash deposited in a controlled account with the agent. Available credit for Parent’s Canadian subsidiaries is generally limited to 85% of their eligible accounts receivable and 100% of their cash deposited in a controlled account with the agent’s Canadian affiliate. The obligations of the Canadian subsidiaries under the revolving credit facility are guaranteed by all of Parent’s Canadian subsidiaries and secured by the accounts receivable of the Canadian subsidiaries, but the Canadian subsidiaries do not guarantee and are not otherwise responsible for the obligations of Parent or its domestic subsidiaries.

On November 1, 2016, the Company entered into an amended and restated credit agreement for its revolving credit facility. Under the amended and restated agreement, the terms are substantially the same as under the prior agreement, but the facility termination date has been extended, subject to certain conditions, until November 1, 2021.

(12) (LOSS) EARNINGS PER SHARE

The following are computations of basic and diluted (loss) earnings per share (in thousands except for per share amounts):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Numerator for basic and diluted (loss) earnings per share:
Net (loss) income	$	(10,255	)	$	40,228	$	(27,160	)	$	43,534
Denominator:
Basic shares outstanding	57,487			58,161		57,575			58,799
Dilutive effect of equity-based compensation awards	—			107		—			99
Dilutive shares outstanding	57,487			58,268		57,575			58,898
Basic (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74
Diluted (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74

As a result of the net loss reported for the three and nine months ended September 30, 2016, all then outstanding stock options, restricted stock awards and performance awards totaling 835,482 were excluded from the calculation of diluted (loss) earnings per share as their inclusion would have an antidilutive effect. 

For the three and nine months ended September 30, 2015, the dilutive effect of all then outstanding options, restricted stock and performance awards is included in the EPS calculations above except for 274,257 of outstanding performance stock awards for which the performance criteria were not attained at that time and 10,704 and 42,642, respectively, of restricted stock awards which were antidilutive at that time.

15

(13) ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in accumulated other comprehensive loss by component and related tax effects for the nine months ended September 30, 2016 were as follows (in thousands):    

	Foreign Currency Translation			Unrealized Gains on Available-For-Sale Securities			Unfunded Pension Liability			Total
Balance at January 1, 2016	$	(252,939	)	$	—		$	(1,953	)	$	(254,892	)
Other comprehensive income (loss) before reclassifications	43,706			(596		)	—			43,110
Tax effects	—			238			—			238
Other comprehensive income (loss)	$	43,706		$	(358	)	$	—		$	43,348
Balance at September 30, 2016	$	(209,233	)	$	(358	)	$	(1,953	)	$	(211,544	)

There were no reclassifications out of accumulated other comprehensive loss during the three and nine months ended September 30, 2016 and 2015.

(14) STOCK-BASED COMPENSATION

Total stock-based compensation cost charged to selling, general and administrative expenses for the three and nine months ended September 30, 2016 was $3.0 million and $7.7 million, respectively. Total stock-based compensation cost charged to selling, general and administrative expenses for the three and nine months ended September 30, 2015 was $0.5 million and $6.6 million, respectively. During the three months ended September 30, 2015, the Company reversed $1.4 million of stock based compensation for performance stock awards originally issued in 2014 as management determined it was no longer probable that a portion of the performance targets would be earned. The total income tax benefit recognized in the consolidated statements of operations from stock-based compensation was $0.9 million and $2.3 million for the three and nine months ended September 30, 2016, respectively. The total income tax benefit recognized in the consolidated statements of operations from stock-based compensation was $0.1 million and $1.8 million for the three and nine months ended September 30, 2015, respectively.

Restricted Stock Awards

The following information relates to restricted stock awards that have been granted to employees and directors under the Company's equity incentive plans (the "Plans"). The restricted stock awards are not transferable until vested and the restrictions generally lapse upon the achievement of continued employment over a three-to-five-year period or service as a director until the following annual meeting of shareholders. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant and is amortized to expense over its vesting period.

The following table summarizes information about restricted stock awards for the nine months ended September 30, 2016:

Restricted Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	362,618		$	55.79
Granted	335,992		$	50.87
Vested	(168,565	)	$	54.06
Forfeited	(46,298	)	$	53.04
Balance at September 30, 2016	483,747		$	53.23

As of September 30, 2016, there was $17.2 million of total unrecognized compensation cost arising from restricted stock awards under the Company's Plans. This cost is expected to be recognized over a weighted average period of 3.0 years. The total fair value of restricted stock vested during the three and nine months ended September 30, 2016 was $1.8 million and $7.9 million, respectively. The total fair value of restricted stock vested during the three and nine months ended September 30, 2015 was $0.6 million and $6.8 million, respectively.

Performance Stock Awards

The following information relates to performance stock awards that have been granted to employees under the Company's Plans. Performance stock awards are subject to performance criteria established by the compensation committee of the Company's

16

board of directors prior to or at the date of grant. The vesting of the performance stock awards is based on achieving such targets typically based on revenue, Adjusted EBITDA margin, return on invested capital percentage and Total Recordable Incident Rate. In addition, performance stock awards include continued service conditions. The fair value of each performance stock award is based on the closing price of the Company's common stock on the date of grant and is amortized to expense over the service period if achievement of performance measures is considered probable.

The following table summarizes information about performance stock awards for the nine months ended September 30, 2016:

Performance Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	187,274		$	57.13
Granted	207,624		$	54.21
Vested	(8,420	)	$	61.90
Forfeited	(33,469	)	$	55.96
Balance at September 30, 2016	353,009		$	55.39

As of September 30, 2016, there was $0.2 million of total unrecognized compensation cost arising from unvested performance stock awards deemed probable of vesting under the Company's Plans. No performance awards vested during the three months ended September 30, 2016. The total fair value of performance awards vested during the nine months ended September 30, 2016 was $0.4 million. The total fair value of performance awards vested during the nine months ended September 30, 2015 was $0.3 million. No performance awards vested during the three months ended September 30, 2015.

Common Stock Repurchases

On March 13, 2015, the Company's board of directors authorized the repurchase of up to $300 million of the Company's common stock. During the three and nine months ended September 30, 2016, the Company repurchased and retired a total of 0.1 million shares and 0.3 million shares, respectively, of the Company's common stock for a total cost of $6.2 million and $16.3 million, respectively. During the three and nine months ended September 30, 2015, the Company repurchased and retired a total of 0.8 million shares and 1.3 million shares, respectively, of the Company's common stock for a total cost of $37.6 million and $69.8 million, respectively. Through September 30, 2016, the Company has repurchased and retired a total of 3.7 million shares of the Company's common stock for a total cost of $194.0 million under this program. As of September 30, 2016, an additional $106.0 million remains available for repurchase of shares under the current authorized program.

(15) COMMITMENTS AND CONTINGENCIES

Legal and Administrative Proceedings

The Company and its subsidiaries are subject to legal proceedings and claims arising in the ordinary course of business. Actions filed against the Company arise from commercial and employment-related claims including alleged class actions related to sales practices and wage and hour claims. The plaintiffs in these actions may be seeking damages or injunctive relief or both. These actions are in various jurisdictions and stages of proceedings, and some are covered in part by insurance. In addition, the Company’s waste management services operations are regulated by federal, state, provincial and local laws enacted to regulate discharge of materials into the environment, remediation of contaminated soil and groundwater or otherwise protect the environment. This ongoing regulation results in the Company frequently becoming a party to legal or administrative proceedings involving all levels of governmental authorities and other interested parties. The issues involved in such proceedings generally relate to alleged violations of existing permits and licenses or alleged responsibility under federal or state Superfund laws to remediate contamination at properties owned either by the Company or by other parties (“third party sites”) to which either the Company or the prior owners of certain of the Company’s facilities shipped wastes.

At September 30, 2016 and December 31, 2015, the Company had recorded reserves of $20.9 million and $21.9 million, respectively, in the Company's financial statements for actual or probable liabilities related to the legal and administrative proceedings in which the Company was then involved, the principal of which are described below. At September 30, 2016 and December 31, 2015, the Company also believed that it was reasonably possible that the amount of these potential liabilities could be as much as $1.8 million and $1.9 million more, respectively. The Company periodically adjusts the aggregate amount of these reserves when actual or probable liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or probable claims becomes available. As of September 30, 2016 and December 31, 2015, the $20.9 million and $21.9 million, respectively, of reserves consisted of (i) $18.3 million and $18.9 million, respectively, related to pending legal or

17

administrative proceedings, including Superfund liabilities, which were included in remedial liabilities on the consolidated balance sheets, and (ii) $2.6 million and $3.0 million, respectively, primarily related to federal, state and provincial enforcement actions, which were included in accrued expenses on the consolidated balance sheets.

As of September 30, 2016, the principal legal and administrative proceedings in which the Company was involved, or which had been terminated during 2016, were as follows:

Ville Mercier.    In September 2002, the Company acquired the stock of a subsidiary (the "Mercier Subsidiary") which owns a hazardous waste incinerator in Ville Mercier, Quebec (the "Mercier Facility"). The property adjacent to the Mercier Facility, which is also owned by the Mercier Subsidiary, is now contaminated as a result of actions dating back to 1968, when the Government of Quebec issued to a company unrelated to the Mercier Subsidiary two permits to dump organic liquids into lagoons on the property. In 1999, Ville Mercier and three neighboring municipalities filed separate legal proceedings against the Mercier Subsidiary and the Government of Quebec. In 2012, the municipalities amended their existing statement of claim to seek $2.9 million (Cdn) in general damages and $10.0 million (Cdn) in punitive damages, plus interest and costs, as well as injunctive relief. Both the Government of Quebec and the Company have filed summary judgment motions against the municipalities. The parties are currently attempting to negotiate a resolution and hearings on the motions have been delayed. In September 2007, the Quebec Minister of Sustainable Development, Environment and Parks issued a Notice pursuant to Section 115.1 of the Environment Quality Act, superseding Notices issued in 1992, which are the subject of the pending litigation. The more recent Notice notifies the Mercier Subsidiary that, if the Mercier Subsidiary does not take certain remedial measures at the site, the Minister intends to undertake those measures at the site and claim direct and indirect costs related to such measures. The Company has accrued for costs expected to be incurred relative to the resolution of this matter and believes this matter will not have a future material effect on its financial position or results of operations.

Safety-Kleen Legal Proceedings. On December 28, 2012, the Company acquired Safety-Kleen, Inc. ("Safety-Kleen") and thereby became subject to the legal proceedings in which Safety-Kleen was a party on that date. In addition to certain Superfund proceedings in which Safety-Kleen has been named as a potentially responsible party as described below under “Superfund Proceedings,” the principal such legal proceedings involving Safety-Kleen which were outstanding as of September 30, 2016 were as follows:

Product Liability Cases. Safety-Kleen has been named as a defendant in various lawsuits that are currently pending in various courts and jurisdictions throughout the United States, including approximately 62 proceedings (excluding cases which have been settled but not formally dismissed) as of September 30, 2016, wherein persons claim personal injury resulting from the use of Safety-Kleen's parts cleaning equipment or cleaning products. These proceedings typically involve allegations that the solvent used in Safety-Kleen's parts cleaning equipment contains contaminants and/or that Safety-Kleen's recycling process does not effectively remove the contaminants that become entrained in the solvent during their use. In addition, certain claimants assert that Safety-Kleen failed to warn adequately the product user of potential risks, including an historic failure to warn that solvent contains trace amounts of toxic or hazardous substances such as benzene.

Safety-Kleen maintains insurance that it believes will provide coverage for these product liability claims (over amounts accrued for self-insured retentions and deductibles in certain limited cases), except for punitive damages to the extent not insurable under state law or excluded from insurance coverage. Safety-Kleen also believes that these claims lack merit and has historically vigorously defended, and intends to continue to vigorously defend, itself and the safety of its products against all of these claims. Such matters are subject to many uncertainties and outcomes are not predictable with assurance. Consequently, Safety-Kleen is unable to ascertain the ultimate aggregate amount of monetary liability or financial impact with respect to these matters as of September 30, 2016. From January 1, 2016 to September 30, 2016, 18 product liability claims were settled or dismissed. Due to the nature of these claims and the related insurance, the Company did not incur any expense as Safety-Kleen's insurance provided coverage in full for all such claims. Safety-Kleen may be named in similar, additional lawsuits in the future, including claims for which insurance coverage may not be available.    

Superfund Proceedings

The Company has been notified that either the Company (which, since December 28, 2012, includes Safety-Kleen) or the prior owners of certain of the Company's facilities for which the Company may have certain indemnification obligations have been identified as potentially responsible parties ("PRPs") or potential PRPs in connection with 129 sites which are subject to or are proposed to become subject to proceedings under federal or state Superfund laws. Of the 129 sites, three (including the BR Facility described below) involve facilities that are now owned or leased by the Company and 126 involve third party sites to which either the Company or the prior owners of certain of the Company’s facilities shipped wastes. Of the 126 third party sites, 32 are now settled, 17 are currently requiring expenditures on remediation and 77 are not currently requiring expenditures on remediation.

18

In connection with each site, the Company has estimated the extent, if any, to which it may be subject, either directly or as a result of any indemnification obligations, for cleanup and remediation costs, related legal and consulting costs associated with PRP investigations, settlements, and related legal and administrative proceedings. The amount of such actual and potential liability is inherently difficult to estimate because of, among other relevant factors, uncertainties as to the legal liability (if any) of the Company or the prior owners of certain of the Company's facilities to contribute a portion of the cleanup costs, the assumptions that must be made in calculating the estimated cost and timing of remediation, the identification of other PRPs and their respective capability and obligation to contribute to remediation efforts, and the existence and legal standing of indemnification agreements (if any) with prior owners, which may either benefit the Company or subject the Company to potential indemnification obligations. Clean Harbors believes its potential liability could exceed $100,000 at 11 of the 126 third party sites.

BR Facility.    The Company acquired in 2002 a former hazardous waste incinerator and landfill in Baton Rouge (the "BR Facility"), for which operations had been previously discontinued by the prior owner. In September 2007, the EPA issued a special notice letter to the Company related to the Devil's Swamp Lake Site ("Devil's Swamp") in East Baton Rouge Parish, Louisiana. Devil's Swamp includes a lake located downstream of an outfall ditch where wastewater and storm water have been discharged, and Devil's Swamp is proposed to be included on the National Priorities List due to the presence of Contaminants of Concern ("COC") cited by the EPA. These COCs include substances of the kind found in wastewater and storm water discharged from the BR Facility in past operations. The EPA originally requested COC generators to submit a good faith offer to conduct a remedial investigation feasibility study directed towards the eventual remediation of the site. The Company is currently performing corrective actions at the BR Facility under an order issued by the Louisiana Department of Environmental Quality, and has begun conducting the remedial investigation and feasibility study under an order issued by the EPA. The Company cannot presently estimate the potential additional liability for the Devil's Swamp cleanup until a final remedy is selected by the EPA.

Third Party Sites.    Of the 126 third party sites at which the Company has been notified it is a PRP or potential PRP or may have indemnification obligations, Clean Harbors has an indemnification agreement at 11 of these sites with ChemWaste, a former subsidiary of Waste Management, Inc., and at six additional of these third party sites, Safety-Kleen has a similar indemnification agreement with McKesson Corporation. These agreements indemnify the Company (which now includes Safety-Kleen) with respect to any liability at the 17 sites for waste disposed prior to the Company's (or Safety-Kleen's) acquisition of the former subsidiaries of Waste Management or McKesson which had shipped wastes to those sites. Accordingly, Waste Management and McKesson are paying all costs of defending those subsidiaries in those 17 cases, including legal fees and settlement costs. However, there can be no guarantee that the Company's ultimate liabilities for those sites will not exceed the amount recorded or that indemnities applicable to any of these sites will be available to pay all or a portion of related costs. Except for the indemnification agreements which the Company holds from ChemWaste, McKesson and one other entity, the Company does not have an indemnity agreement with respect to any of the 126 third party sites discussed above.

Federal, State and Provincial Enforcement Actions

From time to time, the Company pays fines or penalties in regulatory proceedings relating primarily to waste treatment, storage or disposal facilities. As of September 30, 2016 and December 31, 2015, there were five and six proceedings, respectively, for which the Company reasonably believed that the sanctions could equal or exceed $100,000. The Company believes that the fines or other penalties in these or any of the other regulatory proceedings will, individually or in the aggregate, not have a material effect on its financial condition, results of operations or cash flows.

(16) INCOME TAXES

The Company records a tax provision or benefit on an interim basis using an estimated annual effective tax rate. This rate is applied to the current period ordinary income or loss to determine the income tax provision or benefit allocated to the interim period. Losses from jurisdictions for which no benefit can be recognized and the income tax effects of unusual or infrequent items are excluded from the estimated annual effective tax rate and are recognized in the impacted interim period. The estimated annual effective tax rate may be significantly impacted by projected earnings mix by tax jurisdiction. Adjustments to the estimated annual effective income tax rate are recognized in the period when such estimates are revised.

The Company did not record any tax charges or benefits as a result of the goodwill impairment charges recorded in the third quarter of 2016 and in the second quarter of 2015. Absent the impact of the impairment charges on pre-tax income from operations the Company’s effective tax rate for the three and nine months ended September 30, 2016 was 47.8% and 80.3% compared to 46.2% and 44.4%, respectively, for the same periods in 2015. The variations in the effective income tax rates for the three and nine months ended September 30, 2016 as compared to more customary relationships between pre-tax income and the provision for income taxes were primarily due to the Company not recognizing income tax benefits from current operating losses related to certain Canadian entities as well as the impacts of the non-deductible goodwill impairment charge.

19

As of September 30, 2016 and December 31, 2015, the Company had recorded $1.8 million and $2.1 million, respectively, of liabilities for unrecognized tax benefits and $0.3 million and $0.4 million of interest, respectively.

Due to expiring statute of limitation periods, the Company believes that total unrecognized tax benefits will not decrease within the next 12 months.

(17) SEGMENT REPORTING

Segment reporting is prepared on the same basis that the Company's chief executive officer, who is the Company's chief operating decision maker, manages the business, makes operating decisions and assesses performance. As of September 30, 2016, the Company's operations were managed in six reportable segments based primarily upon the nature of the various operations and services provided: Technical Services, Industrial and Field Services which consists of the Industrial Services and Field Services operating segments, Kleen Performance Products, SK Environmental Services, Lodging Services and Oil and Gas Field Services.

Third party revenue is revenue billed to outside customers by a particular segment. Direct revenue is revenue allocated to the segment providing the product or service. Intersegment revenues represent the sharing of third party revenues among the segments based on products and services provided by each segment as if the products and services were sold directly to the third party. The intersegment revenues are shown net. The negative intersegment revenues are due to more transfers out of customer revenues to other segments than transfers in of customer revenues from other segments. The operations not managed through the Company’s six reportable segments are recorded as “Corporate Items.” Corporate Items revenues consist of certain operations for which the revenues are insignificant and not allocated to the segments for internal reporting purposes. Corporate Items cost of revenues represents certain central services that are not allocated to the six segments for internal reporting purposes. Corporate Items selling, general and administrative expenses include typical corporate items such as legal, accounting and other items of a general corporate nature that are not allocated to the Company’s six reportable segments. Performance of the segments is evaluated on several factors, of which the primary financial measure is “Adjusted EBITDA,” which consists of net (loss) income plus accretion of environmental liabilities, depreciation and amortization, net interest expense, provision for income taxes, other non-cash charges not deemed representative of fundamental segment results and excludes other expense. Transactions between the segments are accounted for at the Company’s best estimate based on similar transactions with outside customers. 

The following table reconciles third party revenues to direct revenues for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	For the Three Months Ended September 30, 2016											For the Three Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues			Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	232,482	$	38,795		$	492		$	271,769		$	253,069	$	34,819		$	506		$	288,394
Industrial and Field Services	162,118		(12,734		)	(32		)	149,352			307,226		(6,973		)	(313		)	299,940
Kleen Performance Products	102,318		(9,761		)	—			92,557			100,827		(23,744		)	(6		)	77,077
SK Environmental Services	194,764		(18,955		)	1			175,810			171,832		(5,947		)	2			165,887
Lodging Services	15,520		233			19			15,772			13,507		743			30			14,280
Oil and Gas Field Services	22,197		2,422			86			24,705			46,788		1,102			92			47,982
Corporate Items	121		—			(566		)	(445		)	117		—			(311		)	(194		)
Total	$	729,520	$	—		$	—		$	729,520		$	893,366	$	—		$	—		$	893,366

20

	For the Nine Months Ended September 30, 2016										For the Nine Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues		Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	680,717	$	109,217		$	1,547		$	791,481	$	741,419	$	108,037		$	2,886		$	852,342
Industrial and Field Services	437,546		(29,255		)	(335		)	407,956		807,423		(24,764		)	(636		)	782,023
Kleen Performance Products	256,572		(26,768		)	(1		)	229,803		296,738		(63,429		)	(8		)	233,301
SK Environmental Services	565,186		(59,561		)	369			505,994		508,392		(26,331		)	5			482,066
Lodging Services	47,583		634			54			48,271		68,782		1,899			127			70,808
Oil and Gas Field Services	73,445		5,733			221			79,399		138,992		4,588			141			143,721
Corporate Items	2,064		—			(1,855		)	209		347		—			(2,515		)	(2,168		)
Total	$	2,063,113	$	—		$	—		$	2,063,113	$	2,562,093	$	—		$	—		$	2,562,093

The following table presents Adjusted EBITDA information used by management by reported segment (in thousands). The Company does not allocate interest expense, income taxes, depreciation, amortization, accretion of environmental liabilities, other non-cash charges not deemed representative of fundamental segment results, and other expense (income) to its segments.    

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Adjusted EBITDA:
Technical Services	$	72,333		$	79,048		$	201,622		$	219,257
Industrial and Field Services	18,579			62,460			40,643			145,850
Kleen Performance Products	22,803			12,123			37,358			23,471
SK Environmental Services	47,250			40,096			127,984			108,540
Lodging Services	4,104			1,827			8,145			12,589
Oil and Gas Field Services	(4,425		)	1,579			(10,026		)	800
Corporate Items	(33,993		)	(31,526		)	(101,310		)	(103,501		)
Total	$	126,651		$	165,607		$	304,416		$	407,006
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	2,476			2,577			7,529			7,795
Depreciation and amortization	73,360			69,060			215,655			205,189
Goodwill impairment charge	34,013			—			34,013			31,992
Income from operations	16,802			93,970			47,219			162,030
Other expense	198			139			737			390
Gain on sale of business	(16,431		)	—			(16,431		)	—
Interest expense, net of interest income	21,565			19,017			62,192			57,704
Income before provision for income taxes	$	11,470		$	74,814		$	721		$	103,936

21

The following table presents certain assets by reportable segment and in the aggregate (in thousands):

	September 30, 2016
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	521,040	$	211,712	$	260,608	$	328,655	$	99,764	$	139,137	$	87,655	$	1,648,571
Goodwill	57,637		106,349		68,482		238,165		—		—		—		470,633
Permits and other intangibles, net	74,646		11,490		141,039		264,864		5,951		9,347		—		507,337
Total assets	$	859,794	$	366,929	$	605,160	$	920,333	$	142,948	$	229,480	$	587,969	$	3,712,613

	December 31, 2015
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	483,425	$	237,660	$	193,855	$	264,539	$	105,208	$	156,286	$	91,494	$	1,532,467
Goodwill	49,267		105,286		49,755		216,589		32,208		—		—		453,105
Permits and other intangibles, net	73,601		14,649		140,410		256,251		7,045		14,862		—		506,818
Total assets	$	800,060	$	368,858	$	492,483	$	805,488	$	181,357	$	244,210	$	538,972	$	3,431,428

The following table presents total assets by geographical area (in thousands):

	September 30, 2016		December 31, 2015
United States	$	2,944,936	$	2,575,746
Canada	767,677		851,949
Other foreign	—		3,733
Total	$	3,712,613	$	3,431,428

(18) GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION

The 2020 Notes and the 2021 Notes are guaranteed by substantially all of the Company's subsidiaries organized in the United States (the "U.S. Guarantor Subsidiaries"). Each U.S. Guarantor Subsidiary is a 100% owned subsidiary of Clean Harbors, Inc. ("Parent") and its guarantee is both full and unconditional and joint and several.  The guarantees, are however, subject to customary release provisions under which, in particular, the guarantee of any U.S. Guarantor Subsidiary will be released if the Company sells such subsidiary to an unrelated third party in accordance with the terms of the indenture which governs the notes. The 2020 Notes and the 2021 Notes are not guaranteed by Parent's Canadian or other foreign subsidiaries (the "Foreign Non-Guarantor Subsidiaries"). The following presents supplemental condensed consolidating financial information for Parent, the U.S. Guarantor Subsidiaries and the Foreign Non-Guarantor Subsidiaries, respectively.

As discussed further in Note 11, “Financing Arrangements,” to the Company's consolidated financial statements included herein, on March 14, 2016, Parent issued $250.0 million aggregate principal amount of additional 2021 Notes. In connection with this offering, the proceeds were then transferred to the US Guarantor Subsidiaries and are reflected as an investment of Parent in the U.S. Guarantor Subsidiaries for the period ending September 30, 2016.

22

Following is the condensed consolidating balance sheet at September 30, 2016 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	51,334	$	170,183	$	36,340	$	—		$	257,857
Intercompany receivables	190,728		300,656		34,665		(526,049		)	—
Accounts receivable, net	—		418,170		94,206		—			512,376
Other current assets	2,537		207,488		69,673		—			279,698
Property, plant and equipment, net	—		1,217,704		430,867		—			1,648,571
Investments in subsidiaries	2,813,894		488,437		—		(3,302,331		)	—
Intercompany debt receivable	—		212,171		3,701		(215,872		)	—
Goodwill	—		417,992		52,641		—			470,633
Permits and other intangibles, net	—		439,543		67,794		—			507,337
Other long-term assets	1,197		9,552		25,392		—			36,141
Total assets	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613
Liabilities and Stockholders’ Equity:
Current liabilities	$	22,619	$	438,298	$	78,179	$	—		$	539,096
Intercompany payables	299,848		224,593		1,608		(526,049		)	—
Closure, post-closure and remedial liabilities, net	—		155,710		15,721		—			171,431
Long-term obligations	1,632,577		—		—		—			1,632,577
Intercompany debt payable	3,701		—		212,171		(215,872		)	—
Other long-term liabilities	—		249,401		19,163		—			268,564
Total liabilities	1,958,745		1,068,002		326,842		(741,921		)	2,611,668
Stockholders’ equity	1,100,945		2,813,894		488,437		(3,302,331		)	1,100,945
Total liabilities and stockholders’ equity	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613

23

Following is the condensed consolidating balance sheet at December 31, 2015 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	11,017	$	83,479	$	90,212	$	—		$	184,708
Intercompany receivables	164,709		213,243		39,804		(417,756		)	—
Accounts receivables, net	—		404,580		91,424		—			496,004
Other current assets	—		179,969		60,515		—			240,484
Property, plant and equipment, net	—		1,082,466		450,001		—			1,532,467
Investments in subsidiaries	2,547,307		522,067		—		(3,069,374		)	—
Intercompany debt receivable	—		260,957		3,701		(264,658		)	—
Goodwill	—		367,306		85,799		—			453,105
Permits and other intangibles, net	—		435,080		71,738		—			506,818
Other long-term assets	1,068		10,274		6,500		—			17,842
Total assets	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428
Liabilities and Stockholders’ Equity:
Current liabilities	$	20,813	$	424,588	$	71,719	$	—		$	517,120
Intercompany payables	220,762		195,287		1,707		(417,756		)	—
Closure, post-closure and remedial liabilities, net	—		153,190		14,656		—			167,846
Long-term obligations	1,382,543		—		—		—			1,382,543
Intercompany debt payable	3,701		—		260,957		(264,658		)	—
Other long-term liabilities	—		239,049		28,588		—			267,637
Total liabilities	1,627,819		1,012,114		377,627		(682,414		)	2,335,146
Stockholders’ equity	1,096,282		2,547,307		522,067		(3,069,374		)	1,096,282
Total liabilities and stockholders’ equity	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428

24

Following is the consolidating statement of operations for the three months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	461,139		$	145,780		$	(12,694	)	$	594,225
Product revenues	—			118,106			20,072			(2,883		)	135,295
Total revenues	—			579,245			165,852			(15,577		)	729,520
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(598		)	288,764			110,070			(12,694		)	385,542
Product cost of revenues	—			94,050			15,206			(2,883		)	106,373
Total cost of revenues	(598		)	382,814			125,276			(15,577		)	491,915
Selling, general and administrative expenses	23			88,652			22,279			—			110,954
Accretion of environmental liabilities	—			2,243			233			—			2,476
Depreciation and amortization	—			51,957			21,403			—			73,360
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	575			53,579			(37,352		)	—			16,802
Other expense	—			(188		)	(10		)	—			(198		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(23,042		)	1,456			21			—			(21,565		)
Equity in earnings of subsidiaries, net of taxes	3,225			(22,341		)	—			19,116			—
Intercompany interest income (expense)	—			5,235			(5,235		)	—			—
(Loss) income before (benefit) provision for income taxes	(19,242		)	39,029			(27,433		)	19,116			11,470
(Benefit) provision for income taxes	(8,987		)	35,803			(5,091		)	—			21,725
Net (loss) income	(10,255		)	3,226			(22,342		)	19,116			(10,255		)
Other comprehensive loss	(1,311		)	(1,311		)	(3,927		)	5,238			(1,311		)
Comprehensive (loss) income	$	(11,566	)	$	1,915		$	(26,269	)	$	24,354		$	(11,566	)

25

Following is the consolidating statement of operations for the three months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	612,814		$	162,680		$	(14,827	)	$	760,667
Product revenues	—			117,653			17,591			(2,545		)	132,699
Total revenues	—			730,467			180,271			(17,372		)	893,366
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			413,878			124,625			(14,827		)	523,676
Product cost of revenues	—			101,778			11,737			(2,545		)	110,970
Total cost of revenues	—			515,656			136,362			(17,372		)	634,646
Selling, general and administrative expenses	25			72,811			20,277			—			93,113
Accretion of environmental liabilities	—			2,277			300			—			2,577
Depreciation and amortization	—			46,951			22,109			—			69,060
(Loss) income from operations	(25		)	92,772			1,223			—			93,970
Other income (expense)	—			204			(343		)	—			(139		)
Interest (expense) income	(19,671		)	613			41			—			(19,017		)
Equity in earnings of subsidiaries, net of taxes	52,046			(2,341		)	—			(49,705		)	—
Intercompany interest income (expense)	—			5,666			(5,666		)	—			—
Income (loss) before (benefit) provision for income taxes	32,350			96,914			(4,745		)	(49,705		)	74,814
(Benefit) provision for income taxes	(7,878		)	44,868			(2,404		)	—			34,586
Net income (loss)	40,228			52,046			(2,341		)	(49,705		)	40,228
Other comprehensive loss	(53,541		)	(53,541		)	(34,150		)	87,691			(53,541		)
Comprehensive loss	$	(13,313	)	$	(1,495	)	$	(36,491	)	$	37,986		$	(13,313	)

26

Following is the consolidating statement of operations for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,345,629		$	399,216		$	(35,827	)	$	1,709,018
Product revenues	—			303,342			58,176			(7,423		)	354,095
Total revenues	—			1,648,971			457,392			(43,250		)	2,063,113
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(1,185		)	864,071			321,153			(35,827		)	1,148,212
Product cost of revenues	—			252,512			42,895			(7,423		)	287,984
Total cost of revenues	(1,185		)	1,116,583			364,048			(43,250		)	1,436,196
Selling, general and administrative expenses	84			253,189			69,228			—			322,501
Accretion of environmental liabilities	—			6,846			683			—			7,529
Depreciation and amortization	—			151,348			64,307			—			215,655
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	1,101			121,005			(74,887		)	—			47,219
Other income (expense)	—			124			(861		)	—			(737		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(66,147		)	3,851			104			—			(62,192		)
Equity in earnings of subsidiaries, net of taxes	11,867			(58,031		)	—			46,164			—
Intercompany interest income (expense)	—			15,891			(15,891		)	—			—
(Loss) income before (benefit) provision for income taxes	(53,179		)	84,128			(76,392		)	46,164			721
(Benefit) provision for income taxes	(26,019		)	72,260			(18,360		)	—			27,881
Net (loss) income	(27,160		)	11,868			(58,032		)	46,164			(27,160		)
Other comprehensive gain	43,348			43,348			24,403			(67,751		)	43,348
Comprehensive gain (loss)	$	16,188		$	55,216		$	(33,629	)	$	(21,587	)	$	16,188

27

Following is the consolidating statement of operations for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,659,739		$	546,790		$	(48,185	)	$	2,158,344
Product revenues	—			349,524			63,239			(9,014		)	403,749
Total revenues	—			2,009,263			610,029			(57,199		)	2,562,093
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			1,106,591			426,530			(48,185		)	1,484,936
Product cost of revenues	—			315,322			42,597			(9,014		)	348,905
Total cost of revenues	—			1,421,913			469,127			(57,199		)	1,833,841
Selling, general and administrative expenses	75			247,472			73,699			—			321,246
Accretion of environmental liabilities	—			6,870			925			—			7,795
Depreciation and amortization	—			137,354			67,835			—			205,189
Goodwill impairment charge	—			4,164			27,828			—			31,992
(Loss) income from operations	(75		)	191,490			(29,385		)	—			162,030
Other income (expense)	—			483			(873		)	—			(390		)
Interest (expense) income	(58,962		)	1,115			143			—			(57,704		)
Equity in earnings of subsidiaries, net of taxes	78,956			(38,920		)	—			(40,036		)	—
Intercompany interest income (expense)	—			17,679			(17,679		)	—			—
Income (loss) before (benefit) provision for income taxes	19,919			171,847			(47,794		)	(40,036		)	103,936
(Benefit) provision for income taxes	(23,615		)	92,891			(8,874		)	—			60,402
Net income (loss)	43,534			78,956			(38,920		)	(40,036		)	43,534
Other comprehensive loss	(118,713		)	(118,713		)	(76,752		)	195,465			(118,713		)
Comprehensive loss	$	(75,179	)	$	(39,757	)	$	(115,672	)	$	155,429		$	(75,179	)

28

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from (used in) operating activities	$	43,033		$	128,182		$	7,612		$	—		$	178,827
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(152,836		)	(22,512		)	—			(175,348		)
Proceeds from sales of fixed assets	—			950			3,032			—			3,982
Acquisitions, net of cash acquired	—			(197,089		)	(10,000		)	—			(207,089		)
Proceeds on sale of business	—			18,885			28,249			—			47,134
Costs to obtain or renew permits	—			(949		)	(971		)	—			(1,920		)
Purchase of available-for-sale securities	(102		)	—			(496		)	—			(598		)
Investment in subsidiaries	(250,625		)	—			—			250,625			—
Intercompany	—			(18,118		)	—			18,118			—
Net cash used in investing activities	(250,727		)	(349,157		)	(2,698		)	268,743			(333,839		)
Cash flows from (used in) financing activities:
Change in uncashed checks	—			(6,064		)	(1,020		)	—			(7,084		)
Exercise of stock options	230			—			—			—			230
Issuance of restricted shares, net of shares remitted	(2,500		)	—			—			—			(2,500		)
Repurchases of common stock	(15,869		)	—			—			—			(15,869		)
Excess tax benefit of stock-based compensation	21			—			—			—			21
Deferred financing costs paid	(2,614		)	—			—			—			(2,614		)
Issuance of senior secured notes, including premium	250,625			250,625			—			(250,625		)	250,625
Intercompany	18,118			—			—			(18,118		)	—
Intercompany debt	—			63,118			(63,118		)	—			—
Net cash from (used in) financing activities	248,011			307,679			(64,138		)	(268,743		)	222,809
Effect of exchange rate change on cash	—			—			5,352			—			5,352
Increase (decrease) in cash and cash equivalents	40,317			86,704			(53,872		)	—			73,149
Cash and cash equivalents, beginning of period	11,017			83,479			90,212			—			184,708
Cash and cash equivalents, end of period	$	51,334		$	170,183		$	36,340		$	—		$	257,857

29

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from operating activities	$	9,503		$	240,713		$	59,377		$	—		$	309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(162,329		)	(27,670		)	—			(189,999		)
Proceeds from sale of fixed assets	—			1,177			2,563			—			3,740
Acquisitions, net of cash acquired	—			(79,610		)	—			—			(79,610		)
Costs to obtain or renew permits	—			(4		)	(4,629		)	—			(4,633		)
Intercompany	—			(71,182		)	—			71,182			—
Net cash used in investing activities	—			(311,948		)	(29,736		)	71,182			(270,502		)
Cash flows used in financing activities:
Change in uncashed checks	—			(16,635		)	(5,247		)	—			(21,882		)
Proceeds from exercise of stock options	397			—			—			—			397
Issuance of restricted shares, net of shares remitted	(2,027		)	—			—			—			(2,027		)
Repurchases of common stock	(69,155		)	—			—			—			(69,155		)
Excess tax benefit of stock-based compensation	102			—			—			—			102
Payments of capital leases	—			(203		)	(297		)	—			(500		)
Intercompany	71,182			—			—			(71,182		)	—
Net cash from (used in) financing activities	499			(16,838		)	(5,544		)	(71,182		)	(93,065		)
Effect of exchange rate change on cash	—			—			(13,714		)	—			(13,714		)
Increase (decrease) in cash and cash equivalents	10,002			(88,073		)	10,383			—			(67,688		)
Cash and cash equivalents, beginning of period	1,006			154,147			91,726			—			246,879
Cash and cash equivalents, end of period	$	11,008		$	66,074		$	102,109		$	—		$	179,191

30

ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

In addition to historical information, this Quarterly Report on Form 10-Q contains forward-looking statements, which are generally identifiable by use of the words “believes,” “expects,” “intends,” “anticipates,” “plans to,” “estimates,” “projects,” or similar expressions. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those reflected in these forward-looking statements. Factors that might cause such a difference include, but are not limited to, those discussed under Item 1A, “Risk Factors,” in our Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 25, 2016, under Item 1A, “Risk Factors,” included in Part II—Other Information in this report, and in other documents we file from time to time with the SEC.  Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s opinions only as of the date hereof. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements.

Overview

We are North America’s leading provider of environmental, energy and industrial services. We serve a diverse customer base, including a majority of the Fortune 500, across the chemical, energy, manufacturing and additional markets, as well as numerous government agencies. These customers rely on us to deliver a broad range of services including but not limited to end-to-end hazardous waste management, emergency spill response, industrial cleaning and maintenance, and recycling services. Through our acquisition in December 2012 of Safety-Kleen, Inc. ("Safety-Kleen"), we are also the largest re-refiner and recycler of used oil in the world and the largest provider of parts cleaning and related environmental services to commercial, industrial and automotive customers in North America.

Performance of our segments is evaluated on several factors of which the primary financial measure is Adjusted EBITDA as described more fully below. The following is a discussion of how management evaluates its segments in regards to other factors including key performance indicators that management uses to assess the segments’ results as well as certain macroeconomic trends and influences that impact each reportable segment:

• Technical Services - Technical Services segment results are predicated upon the demand by our customers for waste services directly attributable to waste volumes generated by them and the existence of project work contracted by the Technical Services segment and/or other segments of Clean Harbors whereby waste handling and/or disposal is required. In managing the business and evaluating performance, management tracks the volumes of waste handled and disposed of through our owned incinerators and landfills as well as the utilization of such incinerators. Levels of activity and ultimate performance associated with this segment can be impacted by inherent seasonality in the business and weather conditions, market conditions and overall levels of industrial activity, efficiency of our operations, competition and market pricing of our services and the management of our related operating costs.

• Industrial and Field Services - Industrial and Field Services segment results are impacted by the demand for planned and unplanned industrial related cleaning and maintenance services at customer sites and the requirement for environmental cleanup services on a scheduled or emergency basis, including response to national events such as major oil spills, natural disasters or other events where immediate and specialized services are pertinent. Management considers the number of plant sites where services are contracted and expected site turnaround schedules to be indicators of the businesses’ performance along with the existence of local or national events.

• Kleen Performance Products - Kleen Performance Products results are significantly impacted by the overall market pricing and product mix associated with base and blended oil products and, more specifically, the market prices of Group II base oils, which historically have seen correlation with overall crude oil prices which have experienced significant decline since 2014. Costs incurred in connection with the collection of used oils, which are raw materials associated with the segment’s products, can also be volatile as was the case for much of fiscal year 2015 when such costs were disconnected from market pricing of the based and blended oil products sold by the segment. Given the impact of lower base and blended oil pricing, we are now charging stop fees related to our used oil collection services which have allowed us to more effectively manage the profit spreads inherent in the business. The implementation of our direct sales program resulting in the sale of our renewable oil products directly to our end customers will also impact future operating results.

31

• SK Environmental Services - SK Environmental Services segment results are significantly impacted by the number of parts washers serviced by the business and the ability to attract small quantity waste producers as customers and integrate them into the Clean Harbors waste network. Performance is also predicated upon the segment management’s ability to manage related costs associated with transportation and the servicing of customers and successfully managing costs associated with the collection of used oils which are then transferred to the Kleen Performance Products segment. The implementation of our direct sales program resulting in the sale of our renewable oil products directly to our end customers will also impact future operating results.

• Lodging Services - Lodging Services segment results are dependent upon levels of construction and maintenance activity associated with the oil and related industries in the Oil Sands and other regions of Western Canada in which our camps and lodges operate, as well as demand for our modular unit production. Levels of overall activity in these regions drive the demand and related pricing for lodging and camp accommodations and related services. To mitigate the decrease in demand experienced in this business, we have targeted more non-traditional markets such as schools, hospitals, and other municipal structures to offer our modular unit accommodations and related services. Given that segment's operations are located entirely in Canada, the impact of foreign currency translations which result from changes in the exchange rates between the U.S. and Canadian dollar also significantly impacts the segment's results

• Oil and Gas Field Services - Oil and Gas Field Services segment results are significantly impacted by overall levels of oil and gas related exploration, drilling activity and production in North America. The levels of such exploration, drilling activity and production are largely dependent upon the number of oil rigs in operation, as well as global and North American oil prices on which such activity levels are strongly predicated. Crude oil prices have significantly declined since a high of $106.57 in 2013 to a low of $30.32 in 2016. This oil price volatility and future price uncertainty has resulted in lower activity levels which have negatively impacted the business’ results. The majority of the segment's operations are in Canada, and therefore the impact of US to Canadian dollar foreign currency translation also significantly impacted the segment’s results.

Highlights

Total revenues for the three months ended September 30, 2016 were $729.5 million compared with $893.4 million in the three months ended September 30, 2015. Decreases in total revenues were primarily related to lower levels of emergency response projects, continued weakness in energy related markets which have significantly and negatively impacted our Industrial Services, Oil & Gas Field Services and Lodging Services segments in Western Canada, reductions in commodity pricing and an overall slowdown in industrial production. Direct revenues recorded by our Kleen Performance Products and SK Environmental Services segments in the three months ended September 30, 2016 increased from the comparable period in 2015 primarily due to our recent acquisitions. Our Lodging Services segment, which has continued to be negatively impacted by the weakness in crude oil markets, increased direct revenues in the three months ended September 30, 2016 from the comparable period in 2015 as occupancy rates increased primarily due to turnaround work completed during the period as well as incremental revenue as a result of displaced citizens staying in our lodges during the Western Canada wildfires.

Total revenues for the nine months ended September 30, 2016 were $2.1 billion compared with $2.6 billion in the nine months ended September 30, 2015. Decreases in total revenues were primarily related to lower levels of emergency response projects, continued weakness in crude oil markets which have significantly and negatively impacted our Industrial Services, Oil & Gas Field Services and Lodging Services segments in Western Canada, reductions in commodity pricing, weakening of the Canadian dollar and an overall slowdown in industrial production. Direct revenues recorded by SK Environmental Services in the nine months ended September 30, 2016 increased from the comparable period in 2015 primarily due to our recent acquisitions. The weaker Canadian dollar and related effects of foreign currency translation on our Canadian business operations also negatively impacted direct revenues by approximately $20.0 million in the nine months ended September 30, 2016 from the comparable period in 2015. Changes in segment revenues are more fully described in our Segment Performance section below.

32

We reported income from operations for the three and nine months ended September 30, 2016 of $16.8 million and $47.2 million, respectively, compared with $94.0 million and $162.0 million in the three and nine months ended September 30, 2015. We reported a net loss for the three and nine months ended September 30, 2016 of $10.3 million and $27.2 million, respectively, as compared to net income of $40.2 million and $43.5 million, respectively, in the three and nine months ended September 30, 2015. The net loss for the three and nine months ended September 30, 2016 was attributable in part to a goodwill impairment charge of $34.0 million which we recognized during the third quarter relating to our Lodging Services segment. Adjusted EBITDA, which is the primary financial measure by which our segments are evaluated, decreased23.5% to $126.7 million from $165.6 million in the three months ended September 30, 2015 and decreased25.2% to $304.4 million in the nine months ended September 30, 2016 from $407.0 million in the nine months ended September 30, 2015. The decreased levels of Adjusted EBITDA in the three and nine month ended September 30, 2016 was attributable to lower revenue amounts as described above, partially offset by significant cost reduction initiatives which we successfully undertook in fiscal year 2016. Additional information, including a reconciliation of Adjusted EBITDA to net (loss) income, appears below under the heading "Adjusted EBITDA."

33

Segment Performance

The primary financial measure by which the performance of our segments are evaluated is Adjusted EBITDA. The following table sets forth certain operating data associated with our results of operations for the three and nine months ended September 30, 2016 and 2015 (in thousands).

	Summary of Operations (in thousands)
	For the Three Months Ended										For the Nine Months Ended
	September 30, 2016			September 30, 2015			$ Change			% Change	September 30, 2016			September 30, 2015			$ Change			% Change
Third Party Revenues(1):
Technical Services	$	232,482		$	253,069		$	(20,587	)	(8.1)%	$	680,717		$	741,419		$	(60,702	)	(8.2)%
Industrial and Field Services	162,118			307,226			(145,108		)	(47.2)	437,546			807,423			(369,877		)	(45.8)
Kleen Performance Products	102,318			100,827			1,491			1.5	256,572			296,738			(40,166		)	(13.5)
SK Environmental Services	194,764			171,832			22,932			13.3	565,186			508,392			56,794			11.2
Lodging Services	15,520			13,507			2,013			14.9	47,583			68,782			(21,199		)	(30.8)
Oil and Gas Field Services	22,197			46,788			(24,591		)	(52.6)	73,445			138,992			(65,547		)	(47.2)
Corporate Items	121			117			4			3.4	2,064			347			1,717			494.8
Total	$	729,520		$	893,366		$	(163,846	)	(18.3)%	$	2,063,113		$	2,562,093		$	(498,980	)	(19.5)%
Direct Revenues(1):
Technical Services	$	271,769		$	288,394		$	(16,625	)	(5.8)%	$	791,481		$	852,342		$	(60,861	)	(7.1)%
Industrial and Field Services	149,352			299,940			(150,588		)	(50.2)	407,956			782,023			(374,067		)	(47.8)
Kleen Performance Products	92,557			77,077			15,480			20.1	229,803			233,301			(3,498		)	(1.5)
SK Environmental Services	175,810			165,887			9,923			6.0	505,994			482,066			23,928			5.0
Lodging Services	15,772			14,280			1,492			10.4	48,271			70,808			(22,537		)	(31.8)
Oil and Gas Field Services	24,705			47,982			(23,277		)	(48.5)	79,399			143,721			(64,322		)	(44.8)
Corporate Items	(445		)	(194		)	(251		)	(129.4)	209			(2,168		)	2,377			109.6
Total	729,520			893,366			(163,846		)	(18.3)	2,063,113			2,562,093			(498,980		)	(19.5)
Cost of Revenues(2):
Technical Services	178,456			194,105			(15,649		)	(8.1)	529,410			573,149			(43,739		)	(7.6)
Industrial and Field Services	115,558			223,602			(108,044		)	(48.3)	322,655			588,864			(266,209		)	(45.2)
Kleen Performance Products	64,355			61,451			2,904			4.7	178,241			196,984			(18,743		)	(9.5)
SK Environmental Services	99,415			99,583			(168		)	(0.2)	293,556			293,639			(83		)	—
Lodging Services	10,681			11,644			(963		)	(8.3)	37,084			54,328			(17,244		)	(31.7)
Oil and Gas Field Services	25,220			41,508			(16,288		)	(39.2)	77,790			126,231			(48,441		)	(38.4)
Corporate Items	(1,770		)	2,753			(4,523		)	(164.3)	(2,540		)	646			(3,186		)	(493.2)
Total	491,915			634,646			(142,731		)	(22.5)	1,436,196			1,833,841			(397,645		)	(21.7)
Selling, General & Administrative Expenses:
Technical Services	20,980			15,241			5,739			37.7	60,449			59,936			513			0.9
Industrial and Field Services	15,215			13,878			1,337			9.6	44,658			47,309			(2,651		)	(5.6)
Kleen Performance Products	5,399			3,503			1,896			54.1	14,204			12,846			1,358			10.6
SK Environmental Services	29,145			26,208			2,937			11.2	84,454			79,887			4,567			5.7
Lodging Services	987			809			178			22.0	3,042			3,891			(849		)	(21.8)
Oil and Gas Field Services	3,910			4,895			(985		)	(20.1)	11,635			16,690			(5,055		)	(30.3)
Corporate Items	35,318			28,579			6,739			23.6	104,059			100,687			3,372			3.3
Total	110,954			93,113			17,841			19.2	322,501			321,246			1,255			0.4
Adjusted EBITDA:
Technical Services	72,333			79,048			(6,715		)	(8.5)	201,622			219,257			(17,635		)	(8.0)
Industrial and Field Services	18,579			62,460			(43,881		)	(70.3)	40,643			145,850			(105,207		)	(72.1)
Kleen Performance Products	22,803			12,123			10,680			88.1	37,358			23,471			13,887			59.2
SK Environmental Services	47,250			40,096			7,154			17.8	127,984			108,540			19,444			17.9
Lodging Services	4,104			1,827			2,277			124.6	8,145			12,589			(4,444		)	(35.3)
Oil and Gas Field Services	(4,425		)	1,579			(6,004		)	(380.2)	(10,026		)	800			(10,826		)	(1,353.3)
Corporate Items	(33,993		)	(31,526		)	(2,467		)	(7.8)	(101,310		)	(103,501		)	2,191			2.1
Total	$	126,651		$	165,607		$	(38,956	)	(23.5)%	$	304,416		$	407,006		$	(102,590	)	(25.2)%

______________________

1. Third party revenue is 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.

34

Direct Revenues

There are many factors which have impacted, and continue to impact, our revenues. These factors include, but are not limited to: the level of emergency response projects, overall industrial activity, foreign currency translation, acquisitions, general conditions of the energy related industries, competitive industry pricing, and the effects of fuel prices on our fuel recovery fees.

Technical Services

	For the Three Months Ended									For the Nine Months Ended
	September 30,				2016 over 2015					September 30,				2016 over 2015
	2016		2015		$ Change			% Change		2016		2015		$ Change			% Change
Direct revenues	$	271,769	$	288,394	$	(16,625	)	(5.8	)%	$	791,481	$	852,342	$	(60,861	)	(7.1	)%

Technical Services direct revenues for the three and nine months ended September 30, 2016decreased$16.6 million and $60.9 million, respectively, from the comparable periods in 2015 primarily due to decreased revenues associated with our waste disposal services whereby waste is disposed of through our incinerator and landfill facilities network. This direct revenue decrease was impacted by lower waste volumes disposed of in our landfills, which decreased 49% and 36%, respectively, in the three and nine months ended September 30, 2016 from the comparable periods in 2015. These decreases were primarily due to lower industrial and energy related waste streams as well as project delays and lower customer spending. The utilization rate at our incinerators was 90.0% and 88.2%, respectively, for the three and nine months ended September 30, 2016, compared with 92.0% and 91.4%, respectively, in the comparable periods of 2015. The decrease in utilization rate in the three and nine months ended September 30, 2016 from the comparable periods in 2015 was primarily due to lower overall industrial and energy related waste streams, and a greater number of turnaround days at our incineration facilities in the first nine months ended September 30, 2016.

Industrial and Field Services

	For the Three Months Ended									For the Nine Months Ended
	September 30,				2016 over 2015					September 30,				2016 over 2015
	2016		2015		$ Change			% Change		2016		2015		$ Change			% Change
Direct revenues	$	149,352	$	299,940	$	(150,588	)	(50.2	)%	$	407,956	$	782,023	$	(374,067	)	(47.8	)%

Industrial and Field Services direct revenues for the three and nine months ended September 30, 2016decreased$150.6 million and $374.1 million, respectively, from the comparable periods in 2015. The decreases were primarily due to the large emergency response projects which occurred during the first nine months of 2015 and did not reoccur in 2016. In the three and nine months ended September 30, 2015, those large emergency response projects accounted for revenues of $144.1 million and $313.4 million, respectively. In addition, during the nine months ended September 30, 2016, lower activity levels and pricing pressures in the across North America reduced customer spending on maintenance and turnaround projects resulting in a decrease in revenues of $59.3 million from the comparable period in 2015. Inclusive in the year over year changes within this segment were negative impacts of foreign currency translation on our Canadian operations of approximately $6.0 million in the nine months ended September 30, 2016 from the comparable period in 2015.

Kleen Performance Products

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change			% Change
Direct revenues	$	92,557	$	77,077	$	15,480	20.1	%	$	229,803	$	233,301	$	(3,498	)	(1.5	)%

Kleen Performance Products direct revenues represent third party revenues, which are earned on sales to external customers, reduced by intersegment revenues consisting of amounts paid to the SK Environmental Services segment for collection of used oil which is then further processed into manufacturing base and blended oil products sold by the Kleen Performance Products segment. Direct revenues attributable to the Kleen Performance Products segment increased$15.5 million in the three months ended September 30, 2016 from the comparable period in 2015. Increases in these revenues were derived from acquisitions which accounted for $20.9 million of incremental revenue, and intersegment revenues were reduced by $14.0 million during the three months ended September 30, 2016 due to fully benefiting from a shift to higher charge-for-oil program. These items were partially

35

offset by the impact of decreases in base and blended pricing, which accounted for an $11.2 million decrease to direct revenues in the three months ended September 30, 2016 from the comparable period in 2015.

Direct revenues attributable to the Kleen Performance Products segment decreased$3.5 million in the nine months ended September 30, 2016 from the comparable period in 2015. Decreases in base and blended pricing, which accounted for a $68.0 million decrease to direct revenues in the nine months ended September 30, 2016 from the comparable period in 2015, was partially offset by revenues derived from acquisitions of $33.1 million and intersegment revenues which was reduced by $36.7 million during the nine months ended September 30, 2016 due to fully benefiting from a shift to higher charge-for-oil program. Inclusive in the year over year changes within the Kleen Performance Products segment was also the negative impact of foreign currency translation on our Canadian operations of approximately $3.1 million in the nine months ended September 30, 2016 from the comparable period in 2015.

SK Environmental Services

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change		% Change
Direct revenues	$	175,810	$	165,887	$	9,923	6.0	%	$	505,994	$	482,066	$	23,928	5.0	%

SK Environmental Services direct revenues include intersegment revenues earned from the sale of used oil collection services provided to the Kleen Performance Products segment. SK Environmental Services direct revenues for the three and nine months ended September 30, 2016increased$9.9 million and $23.9 million, respectively, from the comparable periods in 2015 primarily due to increased revenues derived from acquisitions of $4.7 million and $18.2 million, respectively, and incremental organic growth related to the segment’s core service offerings. These increases more than offset the expected reductions in direct revenues derived from intersegment revenues earned through the sale of used oil to the Kleen Performance Products segment and resulting from the successful management of our charge-for-oil program.

Lodging Services

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change			% Change
Direct revenues	$	15,772	$	14,280	$	1,492	10.4	%	$	48,271	$	70,808	$	(22,537	)	(31.8	)%

Lodging Services direct revenues for the three months ended September 30, 2016increased$1.5 million from the comparable period in 2015 primarily due to greater occupancy at our lodges. The occupancy rate at our primary fixed lodges for the three months ended September 30, 2016 was 49% as compared to 19% in the comparable period in 2015 and primarily resulted from a fire-related benefit as well as increased turnaround work during the period.

Lodging Services direct revenues for the nine months ended September 30, 2016decreased$22.5 million from the comparable period in 2015 primarily due to lower pricing consistent with overall market conditions. Inclusive in the year over year changes within this segment was also the negative impact of foreign currency translation on our Canadian operations of approximately $2.4 million in the nine months ended September 30, 2016 from the comparable period in 2015.

Oil and Gas Field Services

	For the Three Months Ended									For the Nine Months Ended
	September 30,				2016 over 2015					September 30,				2016 over 2015
	2016		2015		$ Change			% Change		2016		2015		$ Change			% Change
Direct revenues	$	24,705	$	47,982	$	(23,277	)	(48.5	)%	$	79,399	$	143,721	$	(64,322	)	(44.8	)%

Oil and Gas Field Services direct revenues for the three and nine months ended September 30, 2016decreased$23.3 million and $64.3 million, respectively, from the comparable periods in 2015 primarily due to lower levels of business activity and rig counts serviced by the businesses, which negatively impacted the utilization and overall pricing of our rental equipment and production services assets. Lower exploration budgets of our customers, project cancellations, and reduced customer spending also negatively impacted results in 2016. Rig count serviced by the Oil and Gas Field Services segment decreased approximately 28% and 49% in

36

the three and nine months ended September 30, 2016 from the comparable periods in 2015. Inclusive in the year over year changes within this segment was also the negative impact of foreign currency translation on our Canadian operations of approximately $2.9 million in the nine months ended September 30, 2016 from the comparable period in 2015.

Cost of Revenues

We believe that our ability to manage operating costs is important to our ability to remain price competitive. We continue to upgrade the quality and efficiency of our services through the development of new technology and continued modifications at our facilities, and implementation of strategic sourcing and logistics solutions as well as other cost reduction initiatives in an effort to improve our operating margins.

Technical Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
Cost of revenues	$	178,456		$	194,105		$	(15,649	)	(8.1	)%	$	529,410		$	573,149		$	(43,739	)	(7.6)%
As a % of Direct Revenue	65.7		%	67.3		%				(1.6	)%	66.9		%	67.2		%				(0.3	)%

Technical Services cost of revenues for the three and nine months ended September 30, 2016decreased$15.6 million and $43.7 million, respectively, from the comparable periods in 2015 due primarily to lower overall activity levels. Specific cost reductions included decreases in transportation and fuel cost of $3.7 million and $11.5 million, respectively, labor related costs of $2.8 million and $6.2 million, respectively, and equipment and supply costs of $6.8 million and $19.6 million, respectively. As a percentage of revenues, our costs decreased 1.6% in the three months ended September 30, 2016 as compared to the comparable period in 2015, while also decreasing 0.3% during the nine months ended September 30, 2016 as compared to the comparable period in 2015. These decreases as a percentage of revenue were driven by management’s successful implementation of strategic cost savings initiatives that were implemented in the current year and helped to offset lower revenues.

Industrial and Field Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
Cost of revenues	$	115,558		$	223,602		$	(108,044	)	(48.3	)%	$	322,655		$	588,864		$	(266,209	)	(45.2	)%
As a % of Direct Revenue	77.4		%	74.5		%				2.9	%	79.1		%	75.3		%				3.8	%

Industrial and Field Services cost of revenues for the three and nine months ended September 30, 2016decreased$108.0 million and $266.2 million, respectively, from the comparable periods in 2015, primarily due to large scale emergency response projects which did not reoccur in the current periods. Cost of revenues as a percentage of direct revenue increased 2.9% and 3.8% for the three and nine months ended September 30, 2016 from the comparable periods in 2015. The increases as a percentage of revenue was primarily attributable to the lack of large scale emergency response projects in the current periods. When such large scale projects occur, the business is able to greater leverage its costs structure resulting in higher profit margins.

Kleen Performance Products

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change			% Change
Cost of revenues	$	64,355		$	61,451		$	2,904	4.7	%	$	178,241		$	196,984		$	(18,743	)	(9.5	)%
As a % of Direct Revenue	69.5		%	79.7		%			(10.2	)%	77.6		%	84.4		%				(6.8	)%

Kleen Performance Products cost of revenues for the three months ended September 30, 2016increased$2.9 million from the comparable period in 2015 primarily due to increases in oil additives and other raw material costs of $4.4 million, partially offset by decreases in transportation and fuel costs of $1.2 million. The increased costs associated with oil additives and other raw material costs was attributable to the implementation of our direct sales program. As a percentage of revenues, these costs decreased 10.2% primarily as a result of greater direct revenue levels being achieved in the current period as the business fully benefited from a shift to to the charge-for-oil program.

37

Kleen Performance Products cost of revenues for the nine months ended September 30, 2016decreased$18.7 million from the comparable period in 2015 primarily due to decreased costs of used oil inventory consumed during the first nine months of 2016. During the first nine months of 2015, the segment recognized charges for high priced inventory amounting to $26.0 million and related to used oil collected prior to the full implementation of our charge-for-oil program. In addition, transportation and fuel costs decreased $5.0 million in the nine months ended September 30, 2016 from the comparable period in 2015. These decreases were partially offset by increases in oil additives and other raw material costs of $10.5 million primarily related to our recent acquisitions and implementation of the direct sales program. As a percentage of revenues, these costs decreased 6.8% in the nine months ended September 30, 2016 from the comparable period in 2015 primarily as a result of the higher inventory cost realized during the first nine months of 2015 that did not occur in the comparable period in 2016.

SK Environmental Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
Cost of revenues	$	99,415		$	99,583		$	(168	)	(0.2	)%	$	293,556		$	293,639		$	(83	)	—	%
As a % of Direct Revenue	56.5		%	60.0		%				(3.5	)%	58.0		%	60.9		%				(2.9	)%

SK Environmental Services cost of revenues remained consistent for the three and nine months ended September 30, 2016 from the comparable periods in 2015. As a percentage of revenues, these costs decreased 3.5% in the three months ended September 30, 2016 from the comparable period in 2015. The improved margins were most significantly impacted by the lower used oil collection and other raw material costs which resulted from targeted logistics and sourcing initiatives which were components of our cost savings strategies implemented in the current year.

Lodging Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
Cost of revenues	$	10,681		$	11,644		$	(963	)	(8.3	)%	$	37,084		$	54,328		$	(17,244	)	(31.7	)%
As a % of Direct Revenue	67.7		%	81.5		%				(13.8	)%	76.8		%	76.7		%				0.1	%

Lodging Services cost of revenues remained consistent for the three months ended September 30, 2016 from the comparable period in 2015. As a percentage of direct revenues, these costs decreased 13.8% in the three months ended September 30, 2016 from the comparable period in 2015 as the business benefited from cost reduction strategies implemented during the year.

Lodging Services cost of revenues for the nine months ended September 30, 2016decreased$17.2 million from the comparable period in 2015 primarily due to decreases in catering costs of $6.9 million, labor costs of $5.0 million, equipment rental costs of $2.1 million and utilities costs of $1.7 million. These decreases were the result of overall lower demand for lodging segment services as overall activity in the regions in which the business operates declined, as well as targeted cost savings initiatives implemented during the current periods. As a percentage of direct revenues, these costs remained consistent in the nine months ended September 30, 2016 from the comparable period in 2015.

Oil and Gas Field Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
Cost of revenues	$	25,220		$	41,508		$	(16,288	)	(39.2	)%	$	77,790		$	126,231		$	(48,441	)	(38.4	)%
As a % of Direct Revenue	102.1		%	86.5		%				15.6	%	98.0		%	87.8		%				10.2	%

Oil and Gas Field Services cost of revenues for the three and nine months ended September 30, 2016decreased$16.3 million and $48.4 million, respectively, from the comparable periods in 2015 primarily due to decreases in labor related costs of $8.0 million and $27.3 million, respectively, equipment rental and material costs of $6.0 million and $12.3 million, respectively, and transportation, fuel and repair costs of $1.4 million and $4.6 million, respectively. As a percentage of direct revenues, these costs increased 15.6% and 10.2%, respectively, in the three and nine months ended September 30, 2016 from the comparable periods in 2015. This increase resulted from certain fixed costs incurred which could not be reduced proportionate to the overall lower revenue

38

generated combined with lower margins on revenues provided which resulted from pricing pressures seen in the overall business environment.

Selling, General and Administrative ("SG&A") Expenses

Selling, General and Administrative expenses represent costs incurred in aspects of our business which are not directly attributable to the sale of our services and/or products. We strive to manage such costs commensurate with the overall performance of our segments and corresponding revenue levels. We believe that our ability to properly align these costs with overall business performance is reflective of our strong management of the businesses and further promotes our ability to remain competitive in the marketplace.

Technical Services

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change		% Change
SG&A	$	20,980		$	15,241		$	5,739	37.7	%	$	60,449		$	59,936		$	513	0.9	%
As a % of Direct Revenue	7.7		%	5.3		%			2.4	%	7.6		%	7.0		%			0.6	%

Technical Services selling, general and administrative expenses for the three and nine months ended September 30, 2016increased$5.7 million and $0.5 million, respectively, from the comparable periods in 2015 primarily due to increases in variable compensation of $1.4 million and $1.1 million, respectively, related to incentive compensation reversals which occurred in the third quarter of 2015 and changes in estimates for environmental liabilities of $2.7 million and $0.4 million, respectively, which were one time benefits in the three and nine months ended September 30, 2015. As a percentage of direct revenues, selling, general and administrative expenses increased 2.4% in the three months ended September 30, 2016 from the comparable period in 2015 primarily due to a benefit recorded in the three months ended September 30, 2015 as a result of changes in estimates for environmental liabilities that did not occur in the current period.

Industrial and Field Services

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change			% Change
SG&A	$	15,215		$	13,878		$	1,337	9.6	%	$	44,658		$	47,309		$	(2,651	)	(5.6	)%
As a % of Direct Revenue	10.2		%	4.6		%			5.6	%	10.9		%	6.0		%				4.9	%

Industrial and Field Services selling, general and administrative expenses for the three months ended September 30, 2016increased$1.3 million from the comparable period in 2015 primarily due to increases in salaries and benefits. As a percentage of direct revenues, selling, general and administrative expenses increased 5.6% in the three months ended September 30, 2016 from the comparable period in 2015 primarily due to the decreased overall revenue levels experienced during the three months of 2016 which outpaced decreases in SG&A expenses.

Industrial and Field Services selling, general and administrative expenses for the nine months ended September 30, 2016decreased$2.7 million from the comparable period in 2015 primarily due to decreases in variable compensation. As a percentage of direct revenues, selling, general and administrative expenses increased 4.9% in the nine months ended September 30, 2016 from the comparable period in 2015 primarily due to the decreased overall revenue levels experienced during the nine months of 2016 which outpaced decreases in SG&A expenses.

Kleen Performance Products

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change		% Change
SG&A	$	5,399		$	3,503		$	1,896	54.1	%	$	14,204		$	12,846		$	1,358	10.6	%
As a % of Direct Revenue	5.8		%	4.5		%			1.3	%	6.2		%	5.5		%			0.7	%

Kleen Performance Products selling, general and administrative expenses for the three and nine months ended September 30, 2016increased$1.9 million and $1.4 million, respectively, from the comparable periods in 2015 primarily due to increases in

39

salaries and benefits attributable to incremental costs of acquired businesses that were completed in 2016. As a percentage of direct revenues, selling, general and administrative expenses increased 1.3% in the three months ended September 30, 2016 from the comparable period in 2015 primarily due to the costs associated with our recent acquisitions outpaced increases in overall revenue levels.

SK Environmental Services

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change		% Change
SG&A	$	29,145		$	26,208		$	2,937	11.2	%	$	84,454		$	79,887		$	4,567	5.7	%
As a % of Direct Revenue	16.6		%	15.8		%			0.8	%	16.7		%	16.6		%			0.1	%

SK Environmental Services selling, general and administrative expenses for the three months ended September 30, 2016increased$2.9 million as compared to the comparable period in 2015 primarily due to increases in salaries and benefits of $1.6 million, commission costs of $0.3 million and professional fees of $0.4 million. These increases were attributable to incremental costs of acquired businesses that were completed in 2016.

SK Environmental Services selling, general and administrative expenses for the nine months ended September 30, 2016increased$4.6 million as compared to the comparable period in 2015 primarily due to increases in salaries and benefits of $4.6 million attributable to incremental costs of acquired businesses that were completed in 2016.

Lodging Services

	For the Three Months Ended										For the Nine Months Ended
	September 30,						2016 over 2015				September 30,						2016 over 2015
	2016			2015			$ Change		% Change		2016			2015			$ Change			% Change
SG&A	$	987		$	809		$	178	22.0	%	$	3,042		$	3,891		$	(849	)	(21.8	)%
As a % of Direct Revenue	6.3		%	5.7		%			0.6	%	6.3		%	5.5		%				0.8	%

Lodging Services selling, general and administrative expenses remained consistent for the three and nine months ended September 30, 2016 as compared to the comparable periods in 2015.

Oil and Gas Field Services

	For the Three Months Ended											For the Nine Months Ended
	September 30,						2016 over 2015					September 30,						2016 over 2015
	2016			2015			$ Change			% Change		2016			2015			$ Change			% Change
SG&A	$	3,910		$	4,895		$	(985	)	(20.1	)%	$	11,635		$	16,690		$	(5,055	)	(30.3	)%
As a % of Direct Revenue	15.8		%	10.2		%				5.6	%	14.7		%	11.6		%				3.1	%

Oil and Gas Field Services selling, general and administrative expenses for the three and nine months ended September 30, 2016decreased$1.0 million and $5.1 million, respectively, from the comparable periods in 2015 primarily due to decreases in salaries, benefits and variable compensation of $1.2 million and $3.9 million, respectively. These decreases resulted from strategic cost savings initiatives implemented across the business in 2016. As a percentage of direct revenues, selling, general and administrative expenses increased 5.6% and 3.1% in the three and nine months ended September 30, 2016 from the comparable periods in 2015 as a result of lower overall revenues which outpaced decreases in SG&A expenses.

40

Corporate Items

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change		% Change
SG&A	$	35,318	$	28,579	$	6,739	23.6	%	$	104,059	$	100,687	$	3,372	3.3	%

Corporate Items selling, general and administrative expenses for the three and nine months ended September 30, 2016increased$6.7 million and $3.4 million, respectively, from the comparable periods in 2015 primarily due to increases to variable compensation of $4.3 million and $2.2 million, respectively, and severance costs of $2.8 million and $5.6 million, respectively. These increases were partially offset by decreases related to our cost savings initiatives spread across multiple expense categories.

Adjusted Earnings Before Interest, Taxes, Depreciation and Amortization (“Adjusted EBITDA”)

Management considers Adjusted EBITDA to be a measurement of performance which provides useful information to both management and investors. Adjusted EBITDA should not be considered an alternative to net income or other measurements under generally accepted accounting principles ("GAAP"). Adjusted EBITDA is not calculated identically by all companies, and therefore our measurements of Adjusted EBITDA, while defined consistently and in accordance with our existing credit agreement, may not be comparable to similarly titled measures reported by other companies.

	For the Three Months Ended										For the Nine Months Ended
	September 30, 2016			September 30, 2015			$ Change			% Change	September 30, 2016			September 30, 2015			$ Change			% Change
Adjusted EBITDA:
Technical Services	$	72,333		$	79,048		$	(6,715	)	(8.5)%	$	201,622		$	219,257		$	(17,635	)	(8.0)%
Industrial and Field Services	18,579			62,460			(43,881		)	(70.3)	40,643			145,850			(105,207		)	(72.1)
Kleen Performance Products	22,803			12,123			10,680			88.1	37,358			23,471			13,887			59.2
SK Environmental Services	47,250			40,096			7,154			17.8	127,984			108,540			19,444			17.9
Lodging Services	4,104			1,827			2,277			124.6	8,145			12,589			(4,444		)	(35.3)
Oil and Gas Field Services	(4,425		)	1,579			(6,004		)	(380.2)	(10,026		)	800			(10,826		)	(1,353.3)
Corporate Items	(33,993		)	(31,526		)	(2,467		)	(7.8)	(101,310		)	(103,501		)	2,191			2.1
Total	$	126,651		$	165,607		$	(38,956	)	(23.5)%	$	304,416		$	407,006		$	(102,590	)	(25.2)%

We use Adjusted EBITDA to enhance our understanding of our operating performance, which represents our views concerning our performance in the ordinary, ongoing and customary course of our operations. We historically have found it helpful, and believe that investors have found it helpful, to consider an operating measure that excludes certain expenses relating to transactions not reflective of our core operations.

The information about our operating performance provided by this financial measure is used by our management for a variety of purposes. We regularly communicate Adjusted EBITDA results to our lenders since our loan covenants are based upon levels of Adjusted EBITDA achieved and to our board of directors and discuss with the board our interpretation of such results. We also compare our Adjusted EBITDA performance against internal targets as a key factor in determining cash bonus compensation for executives and other employees, largely because we believe that this measure is indicative of how the fundamental business is performing and is being managed.

We also provide information relating to our Adjusted EBITDA so that analysts, investors and other interested persons have the same data that we use to assess our core operating performance. We believe that Adjusted EBITDA should be viewed only as a supplement to the GAAP financial information. We also believe, however, that providing this information in addition to, and together with, GAAP financial information permits the foregoing persons to obtain a better understanding of our core operating performance and to evaluate the efficacy of the methodology and information used by management to evaluate and measure such performance on a standalone and a comparative basis.

41

The following is a reconciliation of net income to Adjusted EBITDA for the following periods (in thousands):

	For the Three Months Ended					For the Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Net (loss) income	$	(10,255	)	$	40,228	$	(27,160	)	$	43,534
Accretion of environmental liabilities	2,476			2,577		7,529			7,795
Depreciation and amortization	73,360			69,060		215,655			205,189
Goodwill impairment charge	34,013			—		34,013			31,992
Other expense	198			139		737			390
Gain on sale of business	(16,431		)	—		(16,431		)	—
Interest expense, net	21,565			19,017		62,192			57,704
Provision for income taxes	21,725			34,586		27,881			60,402
Adjusted EBITDA	$	126,651		$	165,607	$	304,416		$	407,006

Depreciation and Amortization

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change		% Change
Depreciation of fixed assets and landfill amortization	$	62,603	$	59,150	$	3,453	5.8	%	$	185,399	$	175,482	$	9,917	5.7	%
Permits and other intangibles amortization	10,757		9,910		847		8.5		30,256		29,707		549		1.8
Total depreciation and amortization	$	73,360	$	69,060	$	4,300	6.2	%	$	215,655	$	205,189	$	10,466	5.1	%

Depreciation and amortization increased$4.3 million and $10.5 million, respectively, for the three and nine months ended September 30, 2016 from the comparable periods in 2015 primarily due to a larger fixed asset base resulting from our recent acquisitions.

Goodwill Impairment Charge

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change		% Change
Goodwill impairment charge	$	34,013	$	—	$	34,013	100	%	$	34,013	$	31,992	$	2,021	6.3	%

During the three and nine months ended September 30, 2016, we recorded a $34.0 million goodwill impairment charge on our Lodging Services reporting unit. During the nine months ended September 30, 2015, we recorded a $32.0 million goodwill impairment charge on our Oil and Gas Field Services reporting unit. For additional information regarding these goodwill impairment charges, see Note 7, "Goodwill and Other Intangible Assets" to the accompanying financial statements and the discussion under the goodwill heading within our "Critical Accounting Policies and Estimates" below.

Gain on sale of business

	For the Three Months Ended								For the Nine Months Ended
	September 30,				2016 over 2015				September 30,				2016 over 2015
	2016		2015		$ Change		% Change		2016		2015		$ Change		% Change
Gain on sale of business	$	16,431	$	—	$	16,431	100	%	$	16,431	$	—	$	16,431	100	%

During the three and nine months ended September 30, 2016, we recorded a $16.4 million gain on the sale of a non-core line of business within our Industrial and Field Services segment. For additional information regarding this gain on sale of business, see Note 4, "Disposition of Business" to the accompanying financial statements.

42

Provision for Income Taxes

	For the Three Months Ended									For the Nine Months Ended
	September 30,				2016 over 2015					September 30,				2016 over 2015
	2016		2015		$ Change			% Change		2016		2015		$ Change			% Change
Provision for income taxes	$	21,725	$	34,586	$	(12,861	)	(37.2	)%	$	27,881	$	60,402	$	(32,521	)	(53.8	)%

The income tax provision for the three and nine months ended September 30, 2016 decreased $12.9 million and $32.5 million, respectively, as compared to the comparable periods in 2015. The decrease in provision was the result of lower earnings in the United States during this period as compared to the same period last year. The Company did not record any tax charges or benefits as a result of the goodwill impairment charges recorded in the third quarter of 2016 and the second quarter of 2015. Absent the impact of the impairment charges on pre-tax income from operations, the Company’s effective tax rate for the three and nine months ended September 30, 2016 was 47.8% and 80.3%, respectively, compared to 46.2% and 44.4%, respectively, for the same periods in 2015. The variations in the effective income tax rates for the three and nine months ended September 30, 2016 as compared to more customary relationships between pre-tax income and the provision for income taxes was primarily due to not recognizing income tax benefits from current operating losses related to certain Canadian entities as well as the impacts of the non-deductible goodwill impairment charge.

Liquidity and Capital Resources

	For the Nine Months Ended
(in thousands)	September 30, 2016			September 30, 2015
Net cash from operating activities	$	178,827		$	309,593
Net cash used in investing activities	(333,839		)	(270,502		)
Net cash from (used in) financing activities	222,809			(93,065		)

Net cash from operating activities

Net cash from operating activities for the nine months ended September 30, 2016 was $178.8 million, a decrease of 42.2%, or $130.8 million, compared with net cash from operating activities for the comparable period in 2015. The decrease from comparable periods was primarily the result of lower operating income levels generated in the first nine months of 2016 and the impacts of changes in net working capital as compared to the comparable period in 2015.

Net cash used in investing activities

Net cash used in investing activities for the nine months ended September 30, 2016 was $333.8 million, an increase of 23.4%, or $63.3 million, compared with cash used in investing activities for the comparable period in 2015. The change was primarily driven by an increase in cash paid for acquisitions in the first nine months of 2016 partially offset by proceeds from the sale of a non-core line of business within our Industrial and Field Services segment and lower capital expenditures in 2016.

Net cash from (used in) financing activities

Net cash from financing activities for the nine months ended September 30, 2016 was $222.8 million, compared with cash used in financing activities of $93.1 million for the comparable period in 2015. The change was primarily due to the issuance of $250.0 million in aggregate principle amount of 5.125% senior notes due 2021 which we completed on March 17, 2016, partially offset by lower repurchases of common stock in the nine months ended September 30, 2016 as compared to the previous comparable period.

Working Capital

At September 30, 2016, cash and cash equivalents totaled $257.9 million, compared to $184.7 million at December 31, 2015. At September 30, 2016, cash and cash equivalents held by our foreign subsidiaries totaled $36.3 million and were readily convertible into other foreign currencies including U.S. dollars. At September 30, 2016, the cash and cash equivalent balance for our U.S. operations was $221.5 million, and our U.S. operations had net operating cash flow of $171.2 million for the nine months ended September 30, 2016. Additionally, we have a $400.0 million revolving credit facility of which approximately $201.4 million was available to borrow at September 30, 2016. Based on the above and on our current plans, we believe that our U.S. operations have adequate financial resources to satisfy their liquidity needs without being required to repatriate earnings from foreign subsidiaries. Accordingly, although repatriation to the U.S. of foreign earnings would generally be subject to U.S. income taxation, net of any available foreign tax credits, we have not recorded any deferred tax liability related to such repatriation since we intend to permanently reinvest foreign earnings outside the U.S.

43

We assess our liquidity in terms of our ability to generate cash to fund our operating, investing, and financing activities. Our primary ongoing cash requirements will be to fund operations, capital expenditures, interest payments and investments in line with our business strategy. We believe our future operating cash flows will be sufficient to meet our future operating and internal investing cash needs as well as any cash needs relating to our stock repurchase program. Furthermore, our existing cash balance and the availability of additional borrowings under our revolving credit facility provide additional potential sources of liquidity should they be required.

Financing Arrangements

The financing arrangements and principal terms of our $800.0 million principal amount of 5.25% senior unsecured notes due 2020 and $845.0 million principal amount of 5.125% senior unsecured notes due 2021 which were outstanding at September 30, 2016, and our $400.0 million revolving credit facility, are discussed further in Note 11, “Financing Arrangements,” to our consolidated financial statements included herein.

As of September 30, 2016, we were in compliance with the covenants of all of our debt agreements, and we believe it is reasonably likely that we will continue to meet such covenants.

Common Stock Repurchase Program

On March 13, 2015, our Board of Directors authorized the repurchase of up to $300 million of our common stock. We intend to fund the repurchases through available cash resources. The repurchase program authorizes us to purchase our common stock on the open market from time to time. The share repurchases have been and will be made in a manner that complies with applicable U.S. securities laws. The number of shares purchased and the timing of the purchases will depend on a number of factors, including share price, cash required for future business plans, trading volume and other conditions.  We have no obligation to repurchase stock under this program and may suspend or terminate the repurchase program at any time. During the three and nine months ended September 30, 2016, we repurchased and retired a total of 0.1 million shares and 0.3 million shares, respectively, of our common stock for a total cost of $6.2 million and $16.3 million, respectively. During the three and nine months ended  September 30, 2015, we repurchased and retired a total of 0.8 million shares and 1.3 million shares, respectively, of our common stock for a total cost of $37.6 million and $69.8 million, respectively. Through September 30, 2016, we have repurchased and retired a total of 3.7 million shares of our common stock for a total cost of $194.0 million under this program. As of September 30, 2016, an additional $106.0 million remains available for repurchase of shares under the current authorized program.

Environmental Liabilities

(in thousands)	September 30, 2016		December 31, 2015		$ Change			% Change
Closure and post-closure liabilities	$	62,567	$	56,249	$	6,318		11.2	%
Remedial liabilities	129,081		131,992		(2,911		)	(2.2	)
Total environmental liabilities	$	191,648	$	188,241	$	3,407		1.8	%

Total environmental liabilities as of September 30, 2016 were $191.6 million, an increase of 1.8%, or $3.4 million, compared to the liabilities as of December 31, 2015 primarily due to accretion of $7.5 million as well as new asset retirement obligations and liabilities associated with our recent acquisitions of $4.7 million partially offset by expenditures of $9.4 million.

We anticipate our environmental liabilities, substantially all of which we assumed in connection with our acquisitions, will be payable over many years and that cash flow from operations will generally be sufficient to fund the payment of such liabilities when required. However, events not anticipated (such as future changes in environmental laws and regulations) could require that such payments be made earlier or in greater amounts than currently anticipated, which could adversely affect our results of operations, cash flow and financial condition.

Capital Expenditures

We anticipate that 2016 capital spending will be approximately $200 million. This includes the construction of the new incinerator at our El Dorado, Arkansas facility, which will account for approximately $50 million of capital expenditures in 2016. However, changes in environmental regulations could require us to make significant capital expenditures for our facilities and adversely affect our results of operations and cash flow.

44

Critical Accounting Policies and Estimates

Other than described below, there were no material changes in the first nine months of 2016 to the information provided under the heading “Critical Accounting Policies and Estimates” included in our Annual Report on Form 10-K for the year ended December 31, 2015.

Goodwill. Goodwill is not amortized but is reviewed for impairment annually as of December 31st or when events or changes in the business environment indicate the carrying value of a reporting unit may exceed its fair value. This review is performed by comparing the fair value of each reporting unit to its carrying value, including goodwill. If the fair value is less than the carrying amount, a Step II analysis of the fair value of all the elements of the reporting unit is performed to determine if and to what degree goodwill is impaired. The loss, if any, is measured as the excess of the carrying value of the goodwill over the value of the goodwill implied by the results of the Step II analysis.

We determine our reporting units by identifying the components of each operating segment, and then in some circumstances aggregate components having similar economic characteristics based on quantitative and/or qualitative factors. We have determined that we have six reporting units: Technical Services, Industrial Services and Field Services, Kleen Performance Products, SK Environmental Services, Lodging Services, Oil and Gas Field Services. Our Industrial and Field Services segment includes two separate operating segments: Industrial Services and Field Services.

We conducted our annual goodwill impairment test for all of our reporting units as of December 31, 2015 and determined that goodwill was properly stated. For all reporting units except for Kleen Performance Products, the estimated fair value of each reporting unit significantly exceeded their carrying value. The annual impairment test fair value for all of our reporting units is determined using an income approach with internal discounted cash flow models which incorporate several underlying estimates and assumptions with varying degrees of uncertainty. In all instances, we corroborate our estimated fair values by considering other factors such as the fair value of comparable companies to our reporting units. As part of the annual test we also perform a reconciliation of the total estimated fair values of all the reporting units to our market capitalization.

As disclosed in our quarterly report on Form 10-Q for the period ended June 30, 2016, goodwill attributable to our Lodging reporting unit was at risk of impairment due to persistently weak oil and gas prices that have negatively impacted the Western Canadian energy market. In consideration of the increased risk of impairment associated with that reporting unit, management regularly evaluated whether any changes in events or circumstances had arisen which would indicate that its fair value was less than its carrying value. During the quarter ended September 30, 2016, we continued to monitor the Lodging reporting unit’s performance along with other business specific and macroeconomic factors.

During the quarter ended September 30, 2016, certain events and changes in circumstances arose which led management to conclude that the fair value of the Lodging reporting unit might be less than its carrying value, and therefore an interim goodwill impairment test was conducted. The primary events and changes in circumstances which led to this conclusion were:

• Macroeconomic conditions for service companies operating in western Canada’s oilsands region deteriorated in 2016 primarily due to persistently low oil and gas prices. Persistently low prices have caused Lodging’s main customers to significantly reduce, defer, or cancel oil and gas projects that are in, or had been planned for, this region during periods of more robust commodity pricing.

• Government regulatory delays related to oil and gas pipeline projects have reduced management’s confidence that these projects will move forward in a timely manner or in the form that had been originally contemplated by their planners. These projects represented a significant portion of Lodging’s future growth in terms of the demand they would mean for temporary accommodation from the Lodging reporting unit. While some of these projects have made recent advancements towards successful government approval, the lack of meaningful progress to date does not provide enough positive evidence that a recovery will be significant enough to improve Lodging’s current forecasted outlook.

• There have been consecutive historical quarters where business results were significantly less than internal forecasts, and previous actual results, for the Lodging reporting unit.

• During the third quarter ended September 30, 2016, management’s near term outlook was clarified in regards to the business’ projections and the impacts of large scale forest fires which took place in the Fort McMurray area of Alberta, Canada where we have significant Lodging operations.

45

• Due to the factors listed above, management significantly lowered its 2016 forecasts and long-range plans relative to the Lodging reporting unit.

Significant judgments and unobservable inputs categorized as Level III in the fair value hierarchy are inherent in the impairment test performed for Lodging and include assumptions about the amount and timing of expected future cash flows, growth rates, profit margins and the determination of appropriate discount rates. In performing the Step I test as of September 30, 2016 and utilizing revised long term projections that were developed for all reporting units during Q3, some of the significant assumptions inherent in the long term projections changed from those which were used in performing our annual goodwill impairment test as of December 31, 2015. Based on information known as of September 30, 2016, we reduced the average estimated annual revenue earned by the Lodging reporting unit 18.2% from FY2017 through FY2020 due to the aforementioned macroeconomic events. Compared to our December 31 impairment assessment, estimated EBITDA margins were lowered from 29.7% to 19.1% due to lower anticipated pricing as demand for our services is lower. Lower revenue and EBITDA margin estimates have resulted in lower current expectations for future cash flows which have lengthened our assumptions around the recovery from the current business downturn as compared to assumptions utilized in our previous annual test. The changes in these estimates and business assumptions have a significant negative impact on our estimates of future anticipated cash flows used in our impairment test and therefore on our estimates of the fair value of the Lodging reporting unit.

For purposes of the September 30, 2016 goodwill impairment test, the discount rate was decreased from 13.0% in the prior test to 11.0%, or 200 basis points, primarily due to lower debt borrowing rates and equity returns across the evaluated peer group, which put downward pressure on the reporting unit’s estimated weighted average cost of capital. We also assessed a range of different discount rate assumptions, and noted a change of 50 basis points to the previous discount rate would decrease the estimated fair value of the reporting unit by $6 million to $8 million. A larger discount rate assumption would not have changed the resulting impairment charge as the entire goodwill balance associated with the reporting unit would already be impaired based upon a reduction of 50 basis points to the previously assumed discount rate. If the discount rate utilized in the Step 1 test were reduced by another 200 basis points to 9%, then the results of the Step 1 test would have provided an estimated fair value for Lodging which exceeded its then carrying value. The results of the Step I test therefore indicated that the previously estimated fair value of the reporting unit was less than its carrying value, and therefore a Step II test was performed to determine if and in what amount goodwill was impaired. The results of the Step II test indicated that as of September 30, 2016, the total amount of goodwill was impaired and therefore a $34.0 million impairment charge was recorded to reduce the recorded goodwill value to $0.

During the second quarter of 2015, certain events and changes in circumstances arose which led management to conclude that the fair value of the Oil and Gas Field Services reporting unit might be less than its carrying value and therefore an interim impairment test was conducted relative to goodwill recorded by the Oil and Gas Field Services reporting unit. The primary events and changes in circumstances which led to this conclusion were:    

• The second quarter is the period of time where greater levels of communication with customers and the receipt of bids and proposals for project work takes place and provide management with more clarity into levels of activity and other economic and business indicators for the latter half of the fiscal year and on into the first quarter of the following year. During the second quarter of 2015, it became apparent that oil and gas exploration and production activity would continue to be lower than for historical periods and lower than previously anticipated. This was evidenced by reduced volume in bid and proposal requests from customers and communications indicating the reduction in customer budgets in these areas, as well as lower than anticipated pricing for our services.

• Market and industry reports which management looks to in projecting business conditions and establishing forecast information evidenced more pessimistic views in the near term. The continued depressed price of oil without any upward momentum since December 2014 as well as declining and expected continued decline in rig count for the remainder of 2015 resulted in lower estimates of industry activity in the second half of 2015 and early 2016.

• In recognition of lower than anticipated business results and less optimistic market indicators, management significantly lowered its 2015 forecasts relative to the Oil and Gas reporting unit.

Significant judgments and unobservable inputs categorized as Level III in the fair value hierarchy are inherent in the impairment tests performed and include assumptions about the amount and timing of expected future cash flows, growth rates, profit margins and the determination of appropriate discount rates. In performing the Step I test as of the second quarter of 2015, certain of these significant assumptions changed from those utilized in performing our annual goodwill impairment test as of December 31, 2014. Based upon information known as of the second quarter of 2015, we reduced the estimates and assumptions around FY2015 annual revenue growth from 1% of growth to a contraction in 2015 revenues of 24%. This decrease resulted largely from projects

46

which were expected to occur in the second half of 2015 but are now known to be canceled or reduced as well as updated outlooks on pricing of our services. EBITDA margins relative to 2015 were also reduced from estimates of 13% utilized in the most recent annual test to 6% currently. We had assumed greater EBITDA margin expansion driven by more positive revenue growth which increased estimated future cash flows. The reduction in margin assumptions utilized in the current Step I test were based upon the lower levels of revenue currently forecasted for 2015, lower pricing of our services and less than anticipated cost savings from cost cutting measures which had previously been planned and had not fully materialized in 2015. These lower revenue and margin estimates associated with 2015 resulted in lower current expectations of 2015 cash flows and also led to decreases in expected revenues and cash flows in future periods, thus lengthening our assumptions around the recovery from the current business downturn as compared to assumptions utilized in our annual test. The changes in these estimates and business assumptions had significant negative impact on our estimates of future anticipated cash flows used in our impairment test and therefore on our estimates of the fair value of the Oil and Gas Field Services reporting unit. Discount rate assumptions utilized in the second quarter of 2015 test were consistent with those used in the prior annual test. The results of the Step I test indicated that the current estimated fair value of the reporting unit was less than its carrying value and therefore a Step II test was performed to determine if and in what amount goodwill recorded by the Oil and Gas Field Services segment was impaired. The results of the Step II test indicated that as of the second quarter of 2015, the total amount of goodwill recorded by that reporting unit was impaired and accordingly a $32.0 million impairment charge was recorded.

As a result of the sale of the Catalyst Services business, we performed a Step I goodwill impairment test to determine if the estimated fair value of the remaining Industrial Services reporting unit was less than its carrying value. In performing the Step 1 test, the estimated fair value of the Industrial Services reporting unit was determined using an income approach with discounted cash flows.  The results of the Step I test indicated that the current estimated fair value of the reporting unit was greater than its carrying value by approximately 10%. Significant assumptions included in the discounted cash flow model utilized to estimate the reporting unit’s fair value were an estimated compounded annual revenue growth assumption of approximately 5% over the five year discrete period and 3% thereafter, lower estimated EBITDA margins in the near term with improvement over the discrete period resulting in estimated margins consistent with the historical performance of the business by the end of the discrete period. A weighted average cost of capital assumption of approximately 10% was utilized to discount the estimated future cash flows of the business in order to estimate its current fair value. Given that estimated fair value exceeded carrying value we did not proceed to Step II of the goodwill impairment test. Goodwill allocated to the Industrial Services reporting unit at September 30, 2016 was $25.1 million.

Other Long-Lived Assets. We also performed an analysis to determine whether the carrying values of Lodging’s finite-lived intangible and other long lived assets may not be entirely recoverable. As of September 30, 2016 the Lodging reporting unit had property, plant and equipment, of $99.8 million and other intangible assets of $6.0 million consisting of customer relationships. Based on the analysis performed, sufficient undiscounted cash flows were available over those assets' remaining lives to demonstrate recoverability. Thus no impairment charge was taken.

As of September 30, 2016, the Oil and Gas Field Services reporting unit had other long-lived assets consisting of property, plant and equipment, net of $139.1 million and intangible assets of $9.3 million. In consideration of the reporting unit's continued lower than historical results and overall slowdown in the oil and gas related industries, we continue to monitor the carrying value of the segment's long-lived assets and assess the risk of asset impairment. As a result of analyses performed as of September 30, 2016, we concluded that no events or circumstances have arisen which would indicate that the carrying values of the assets are not recoverable.

We will continue to evaluate all of our goodwill and other long-lived assets impacted by economic downturns most predominantly in oil and energy related markets in which they operate. If further economic difficulties resulting from depressed oil and gas related pricing and lower overall activity levels, particularly in our Canadian operations, continue for a significant foreseeable period of time and thus future operating results are significantly less than current expectations additional impairment charges may be recognized. The market conditions which could lead to such future impairments are currently most prevalent in our Oil and Gas Field Services, Lodging Services and Industrial Services operations.

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There were no material changes in the first nine months of 2016 to the information provided under Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” in the Company's Annual Report on Form 10-K for the year ended December 31, 2015.

47

ITEM 4.CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Based on an evaluation under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer, as of the end of the period covered by this Quarterly Report on 10-Q, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures (as defined under Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) were effective as of September 30, 2016 to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of Exchange Act Rules 13a-15 or 15d-15 that was conducted during the quarter ending September 30, 2016 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

48

CLEAN HARBORS, INC. AND SUBSIDIARIES

PART II—OTHER INFORMATION

ITEM 1.LEGAL PROCEEDINGS

See Note 15, “Commitments and Contingencies,” to the financial statements included in Item 1 of this report, which description is incorporated herein by reference.

ITEM 1A.RISK FACTORS

During the nine months ended September 30, 2016, there were no material changes from the risk factors as previously disclosed in Item 1A in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. 

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Common Stock Repurchase Program

The following table provides information with respect to the shares of common stock repurchased by us for the periods indicated.

Period	Total Number of Shares Purchased (1)	Average Price Paid Per Share (2)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (3)
July 1, 2016 through July 31, 2016	227	$	52.57	—	$	112,178,022
August 1, 2016 through August 31, 2016	309	$	51.48	—	$	112,178,022
September 1, 2016 through September 30, 2016	146,698	$	46.40	133,956	$	105,963,952
Total	147,234	$	46.42	133,956	$	105,963,952

______________________

(1) Includes 13,278 shares withheld by us from employees to satisfy employee tax obligations upon vesting of restricted stock units granted to our employees under our long-term equity incentive programs.

(2) The average price paid per share of common stock repurchased under the stock repurchase program includes the commissions paid to brokers.

(3) On March 13, 2015, the Company's board of directors authorized the repurchase of up to $300 million of the Company's common stock. We have funded and intend to fund the repurchases through available cash resources. The stock repurchase program authorizes us to purchase our common stock on the open market from time to time. The stock repurchases have been and will be made in a manner that complies with applicable U.S. securities laws. The number of shares purchased and the timing of the purchases will depend on a number of factors, including share price, cash required for future business plans, trading volume and other conditions. We have no obligation to repurchase stock under this program and may suspend or terminate the repurchase program at any time.

ITEM 3.DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4.MINE SAFETY DISCLOSURE

Not applicable

ITEM 5.OTHER INFORMATION

None

49

ITEM 6.EXHIBITS

Item No.	Description	Location
31.1	Rule 13a-14a/15d-14(a) Certification of the CEO Alan S. McKim	Filed herewith
31.2	Rule 13a-14a/15d-14(a) Certification of the CFO Michael L. Battles	Filed herewith
32	Section 1350 Certifications	Filed herewith
101	Interactive Data Files Pursuant to Rule 405 of Regulation S-T: Financial statements from the quarterly report on Form 10-Q of Clean Harbors, Inc. for the quarter ended September 30, 2016, formatted in XBRL: (i) Consolidated Balance Sheets, (ii) Unaudited Consolidated Statements of Operations, (iii) Unaudited Consolidated Statements of Comprehensive (Loss) Income, (iv) Unaudited Consolidated Statements of Cash Flows, (v) Unaudited Consolidated Statements of Stockholders’ Equity, and (vi) Notes to Unaudited Consolidated Financial Statements.	*

_______________________

* Interactive data files are furnished and deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

50

CLEAN HARBORS, INC. AND SUBSIDIARIES

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 

		CLEAN HARBORS, INC.
		Registrant
		By:	/s/  ALAN S. MCKIM
			Alan S. McKim
			Chairman and Chief Executive Officer
Date:	November 2, 2016
		By:	/s/  MICHAEL L. BATTLES
			Michael L. Battles
			Executive Vice President and Chief Financial Officer
Date:	November 2, 2016

51

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Alan S. McKim, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Clean Harbors, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Alan S. McKim

Alan S. McKim

Chairman and Chief Executive Officer

Date: November 2, 2016

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Michael L. Battles, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Clean Harbors, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Michael L. Battles

Michael L. Battles

Executive Vice President and Chief Financial Officer

Date: November 2, 2016

EX-32

EXHIBIT 32

CLEAN HARBORS, INC. AND SUBSIDIARIES

CERTIFICATION PURSUANT TO
SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES OXLEY ACT OF 2002

Pursuant to 18 U.S.C. §1350, each of the undersigned certifies that, to his knowledge, this Quarterly Report on Form 10-Q for the period ended September 30, 2016 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in this report fairly presents, in all material respects, the financial condition and results of operations of Clean Harbors, Inc.

		By:	/s/  ALAN S. MCKIM
			Alan S. McKim
			Chairman and Chief Executive Officer
Date:	November 2, 2016
		By:	/s/  MICHAEL L. BATTLES
			Michael L. Battles
			Executive Vice President and Chief Financial Officer
Date:	November 2, 2016

XML

DOCUMENT AND ENTITY INFORMATION - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	CLEAN HARBORS INC
Entity Central Index Key	0000822818
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		57,392,673

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 257,857	$ 184,708
Accounts receivable, net of allowances aggregating $28,782 and $31,426, respectively	512,376	496,004
Unbilled accounts receivable	41,542	25,940
Deferred costs	19,970	18,758
Inventories and supplies	177,288	149,521
Prepaid expenses and other current assets	40,898	46,265
Total current assets	1,049,931	921,196
Property, plant and equipment, net	1,648,571	1,532,467
Other assets:
Deferred financing costs	1,197	1,847
Goodwill	470,633	453,105
Permits and other intangibles, net	507,337	506,818
Other	34,944	15,995
Total other assets	1,014,111	977,765
Total assets	3,712,613	3,431,428
Current liabilities:
Accounts payable	226,776	241,183
Deferred revenue	66,023	61,882
Accrued expenses	226,080	193,660
Current portion of closure, post-closure and remedial liabilities	20,217	20,395
Total current liabilities	539,096	517,120
Other liabilities:
Closure and post-closure liabilities, less current portion of $6,057 and $7,229, respectively	56,510	49,020
Remedial liabilities, less current portion of $14,160 and $13,166, respectively	114,921	118,826
Long-term obligations	1,632,577	1,382,543
Deferred taxes, unrecognized tax benefits and other long-term liabilities	268,564	267,637
Total other liabilities	2,072,572	1,818,026
Commitments and contingent liabilities
Stockholders’ equity:
Common Stock, $.01 par value: Authorized 80,000,000; shares issued and outstanding 57,389,531 and 57,593,201 shares, respectively	574	576
Shares held under employee participation plan	(469)	(469)
Additional paid-in capital	726,878	738,401
Accumulated other comprehensive loss	(211,544)	(254,892)
Accumulated earnings	585,506	612,666
Total stockholders’ equity	1,100,945	1,096,282
Total liabilities and stockholders’ equity	$ 3,712,613	$ 3,431,428

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Account receivable, allowances aggregating	$ 28,782	$ 31,426
Closure and post-closure liabilities, current portion	6,057	7,229
Remedial liabilities, current portion	$ 14,160	$ 13,166
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	80,000,000	80,000,000
Common stock, issued shares (in shares)	57,389,531	57,593,201
Common stock, outstanding shares (in shares)	57,389,531	57,593,201

XML

UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Service revenues	$ 594,225	$ 760,667	$ 1,709,018	$ 2,158,344
Product revenues	135,295	132,699	354,095	403,749
Total revenues	729,520	893,366	2,063,113	2,562,093
Cost of revenues (exclusive of items shown separately below)
Service revenues	385,542	523,676	1,148,212	1,484,936
Product revenues	106,373	110,970	287,984	348,905
Total cost of revenues	491,915	634,646	1,436,196	1,833,841
Selling, general and administrative expenses	110,954	93,113	322,501	321,246
Accretion of environmental liabilities	2,476	2,577	7,529	7,795
Depreciation and amortization	73,360	69,060	215,655	205,189
Goodwill impairment charge	34,013	0	34,013	31,992
Income (loss) from operations	16,802	93,970	47,219	162,030
Other expense	(198)	(139)	(737)	(390)
Gain on sale of business	16,431	0	16,431	0
Interest expense, net of interest income of $196, $126, $571 and $465, respectively	(21,565)	(19,017)	(62,192)	(57,704)
(Loss) income before (benefit) provision for income taxes	11,470	74,814	721	103,936
Provision for income taxes	21,725	34,586	27,881	60,402
Net (loss) income	$ (10,255)	$ 40,228	$ (27,160)	$ 43,534
(Loss) earnings per share:
Basic (in USD per share)	$ (0.18)	$ 0.69	$ (0.47)	$ 0.74
Diluted (in USD per share)	$ (0.18)	$ 0.69	$ (0.47)	$ 0.74
Shares used to compute (loss) earnings per share - Basic (in shares)	57,487	58,161	57,575	58,799
Shares used to compute (loss) earnings per share - Diluted (in shares)	57,487	58,268	57,575	58,898

XML

UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Interest expense	$ 196	$ 126	$ 571	$ 465

XML

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (10,255)	$ 40,228	$ (27,160)	$ 43,534
Other comprehensive (loss) income:
Unrealized losses on available-for-sale securities (net of taxes of $238, $0, $238 and $0, respectively)	(164)	0	(358)	0
Foreign currency translation adjustments	(1,147)	(53,541)	43,706	(118,713)
Other comprehensive (loss) income	(1,311)	(53,541)	43,348	(118,713)
Comprehensive (loss) income	$ (11,566)	$ (13,313)	$ 16,188	$ (75,179)

XML

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Unrealized gains (losses) on available-for-sale securities, taxes	$ 238	$ 0	$ 238	$ 0

XML

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net (loss) income	$ (27,160)	$ 43,534
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	215,655	205,189
Goodwill impairment charge	34,013	31,992
Allowance for doubtful accounts	6,203	5,631
Amortization of deferred financing costs and debt discount	2,685	2,459
Accretion of environmental liabilities	7,529	7,795
Changes in environmental liability estimates	(349)	(2,200)
Deferred income taxes	(28,826)	(18,994)
Stock-based compensation	7,735	6,550
Excess tax benefit of stock-based compensation	(21)	(102)
Net tax deficiency on stock based awards	(642)	(78)
Other expense	1,247	390
Gain on sale of business	(16,431)	0
Environmental expenditures	(9,374)	(16,773)
Changes in assets and liabilities, net of acquisitions
Accounts receivable and unbilled accounts receivable	(32,944)	(63,222)
Inventories and supplies	(13,722)	14,708
Other current assets	5,619	18,706
Accounts payable	(11,951)	47,051
Other current and long-term liabilities	39,561	26,957
Net cash from operating activities	178,827	309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	(175,348)	(189,999)
Proceeds from sales of fixed assets	3,982	3,740
Acquisitions, net of cash acquired	(207,089)	(79,610)
Proceeds on sale of business, net of cash	47,134	0
Additions to intangible assets, including costs to obtain or renew permits	(1,920)	(4,633)
Purchases of available-for-sale securities	(598)	0
Net cash used in investing activities	(333,839)	(270,502)
Cash flows from (used in) financing activities:
Change in uncashed checks	(7,084)	(21,882)
Proceeds from exercise of stock options	230	397
Issuance of restricted shares, net of shares remitted	(2,500)	(2,027)
Repurchases of common stock	(15,869)	(69,155)
Deferred financing costs paid	(2,614)	0
Payments on capital leases	0	(500)
Excess tax benefit of stock-based compensation	21	102
Issuance of senior secured notes, including premium	250,625	0
Net cash from (used in) financing activities	222,809	(93,065)
Effect of exchange rate change on cash	5,352	(13,714)
Increase (decrease) in cash and cash equivalents	73,149	(67,688)
Cash and cash equivalents, beginning of period	184,708	246,879
Cash and cash equivalents, end of period	257,857	179,191
Cash payments for interest and income taxes:
Interest paid	66,261	58,613
Income taxes paid	27,196	32,276
Non-cash investing and financing activities:
Accrual for repurchased shares	479	658
Property, plant and equipment accrued	18,181	29,549
Receivable for estimated purchase price adjustment	$ 1,910	$ 2,518

XML

UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Shares Held Under Employee Participation Plan	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings
Balance at beginning of period at Dec. 31, 2015	$ 1,096,282	$ 576	$ (469)	$ 738,401	$ (254,892)	$ 612,666
Balance beginning of period (in shares) at Dec. 31, 2015		57,593
Increase (Decrease) in Stockholders' Equity
Net (loss) income	(27,160)					(27,160)
Other comprehensive income	43,348				43,348
Stock-based compensation	7,735			7,735
Issuance of restricted shares, net of shares remitted	(2,500)	$ 1		(2,501)
Issuance of restricted shares, net of shares remitted (in shares)		124
Repurchases of common stock	$ (16,348)	$ (3)		(16,345)
Repurchases of common stock (in shares)	(300)	(337)
Exercise of stock options	$ 230			230
Exercise of stock options (in shares)		10
Net tax deficiency on stock based awards	(642)			(642)
Balance at end of period at Sep. 30, 2016	$ 1,100,945	$ 574	$ (469)	$ 726,878	$ (211,544)	$ 585,506
Balance ending of period (in shares) at Sep. 30, 2016		57,390

XML

UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS'S EQUITY (PARENTHETICAL) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]
Common stock, par value (in USD per share)	$ 0.01	$ 0.01

XML

BASIS OF PRESENTATION

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION

The accompanying consolidated interim financial statements are unaudited and include the accounts of Clean Harbors, Inc. and its subsidiaries (collectively, “Clean Harbors,” the “Company” or "we") and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) and, in the opinion of management, include all adjustments which are of a normal recurring nature, necessary for a fair presentation of the financial position, results of operations, and cash flows for the periods presented. Management has made estimates and assumptions affecting the amounts reported in the Company's consolidated interim financial statements and accompanying footnotes, actual results could differ from those estimates and judgments. The results for interim periods are not necessarily indicative of results for the entire year or any other interim periods. The financial statements presented herein should be read in connection with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, which includes the audited consolidated balance sheet as of December 31, 2015 from which the one presented herein was derived.

XML

SIGNIFICANT ACCOUNTING POLICIES

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

SIGNIFICANT ACCOUNTING POLICIES

SIGNIFICANT ACCOUNTING POLICIES

The Company's significant accounting policies are described in Note 2, "Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the year ended December 31, 2015. There have been no material changes in these policies or their application.

Recent Accounting Pronouncements

Standards implemented

In February 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2015-02, Consolidation (Topic 810). The amendment provides guidance regarding amendments to the consolidation analysis. The adoption of ASU 2015-02 as of January 1, 2016 did not have an impact on the Company's consolidated financial statements.

In September 2015, FASB issued ASU 2015-16, Business Combinations (Topic 805). The amendment provides guidance to simplify the accounting for adjustments made to provisional amounts recognized in a business combination. This amendment eliminates the requirement to retrospectively account for those adjustments. ASU 2015-16 is applied prospectively to adjustments to provisional amounts that occur after the effective date of this update. The adoption of ASU 2015-16 as of January 1, 2016 did not have a material impact on the Company's consolidated financial statements.

Standards to be implemented

The Company is currently evaluating the impact that the below standards to be implemented will have on the Company's consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases (Topic 842). The amendment increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 should be applied using a modified retrospective approach and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2018.

In March 2016, FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606). ASU 2016-08 reduces the potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718). The amendment simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 allows for retrospective or prospective application and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016.

In April 2016, FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). ASU 2016-10 reduces the potential for diversity in initial application, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In May 2016, FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606). ASU 2016-12 provided narrow scope improvements and practical expedients on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force). The amendment provides updated guidance on eight specific cash flow issues, including debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from settlement of insurance claims and corporate-owned life insurance, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. Early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2017.

XML

BUSINESS COMBINATIONS

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS

2016 Acquisitions

During the first nine months of 2016, the Company acquired seven businesses that will primarily complement the strategy to create a direct sales model as it relates to the sale of the Company's oil products. These acquisitions provided the Company two additional oil re-refineries while also expanding its used motor oil collection network and providing greater blending and packaging capabilities. These acquisitions provide the Company with greater access to customers in the West Coast region of the United States and additional locations with Part B permits. Operations of these acquisitions are primarily being integrated across the SK Environmental Services and Kleen Performance Products segments with certain operations also being integrated into the Technical Services and Industrial and Field Services segments.

The combined purchase price for the seven acquisitions was approximately $205.2 million paid in cash and subject to customary post-closing adjustments. The combined amount of direct revenue from the acquisitions included in the Company's results of operations for each of the three and nine months ended September 30, 2016 was approximately $26.0 million and $38.1 million, respectively. During the three and nine months ended September 30, 2016, the Company incurred acquisition-related costs of approximately $0.7 million and $1.2 million, respectively, in connection with the transactions which are included in selling, general and administrative expenses in the consolidated statements of operations.

    The allocation of the purchase price was based on preliminary estimates of the fair value of assets acquired and liabilities assumed as of the acquisition dates. Given the recent timing of these transactions, the Company is continuing to obtain information to complete its valuation of these accounts and the associated tax accounting. The components and preliminary allocation of the purchase price consist of the following amounts (in thousands):

	At Acquisition Dates			Measurement Period Adjustments			At Acquisition Dates As Reported September 30, 2016
Accounts receivable	$	17,384		$	(1,016	)	$	16,368
Inventories and supplies	13,859			(1,071		)	12,788
Prepaid expenses and other current assets	920			9			929
Property, plant and equipment	132,705			(1,843		)	130,862
Permits and other intangibles	23,405			3,651			27,056
Deferred tax assets	855			(2		)	853
Current liabilities	(19,486		)	(438		)	(19,924		)
Closure and post-closure liabilities	(1,709		)	(699		)	(2,408		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(9,518		)	(1,894		)	(11,412		)
Total identifiable net assets	158,415			(3,303		)	155,112
Goodwill	48,674			1,393			50,067
Total purchase price, net of cash acquired	$	207,089		$	(1,910	)	$	205,179

Pro forma revenue and earnings amounts on a combined basis as if these acquisitions had been completed on January 1, 2015 are immaterial to the consolidated financial statements of the Company since that date.

2015 Acquisitions

Thermo Fluids Inc.

On April 11, 2015, the Company completed the acquisition of Heckmann Environmental Services, Inc. (“HES”) and Thermo Fluids Inc. (“TFI”), a wholly-owned subsidiary of HES. The acquisition was accomplished through a purchase by Safety-Kleen, Inc., a wholly-owned subsidiary of the Company, of all of the issued and outstanding shares of HES from Nuverra Environmental Solutions, Inc. HES is a holding company that does not conduct any operations. TFI provides environmental services, including used oil recycling, used oil filter recycling, antifreeze products, parts washers and solvent recycling, and industrial waste management services, including vacuum services, remediation, lab pack and hazardous waste management. The Company acquired TFI for a purchase price of $79.3 million. The acquisition was financed with cash on hand and expands the Company’s environmental services customer base while also complimenting the SK Environmental Services network and presence in the western United States. Results of TFI since acquisition have been included within the SK Environmental Services segment.

The allocation of the purchase price was based on estimates of the fair value of assets acquired and liabilities assumed as of April 11, 2015. The Company believes that such information provides a reasonable basis for estimating the fair values of assets acquired and liabilities assumed. The Company finalized the purchase accounting for the acquisition of TFI in the second quarter of 2016.

The following table summarizes the recognized amounts of assets acquired and liabilities assumed at April 11, 2015 (in thousands):

	Preliminary Allocations			Measurement Period Adjustments			Final Allocations
Accounts receivable	$	7,109		$	192		$	7,301
Inventories and supplies	1,791			—			1,791
Prepaid and other current assets	1,749			(1,084		)	665
Property, plant and equipment	30,468			(2,827		)	27,641
Permits and other intangibles	20,000			(1,900		)	18,100
Current liabilities	(5,859		)	(25		)	(5,884		)
Closure and post-closure liabilities	(1,676		)	(657		)	(2,333		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(13,081		)	3,907			(9,174		)
Total identifiable net assets	40,501			(2,394		)	38,107
Goodwill	36,591			4,638			41,229
Total purchase price, net of cash acquired	$	77,092		$	2,244		$	79,336

Pro forma revenue and earnings amounts on a combined basis as if TFI had been acquired on January 1, 2015 are immaterial to the consolidated financial statements of the Company since that date.

Other 2015 Acquisition

In December 2015, the Company acquired certain assets and assumed certain defined liabilities of a privately owned company for approximately $14.7 million in cash. That company specializes in the collection and recycling of used oil filters and was a service provider to the SK Environmental Services segment prior to the acquisition. The acquired assets have been integrated into the SK Environmental Services segment. In connection with this acquisition a preliminary goodwill amount of $7.4 million was recognized.

XML

DISPOSITION OF BUSINESS

9 Months Ended

Sep. 30, 2016

Discontinued Operations and Disposal Groups [Abstract]

DISPOSITION OF BUSINESS

DISPOSITION OF BUSINESS

On September 1, 2016, the Company completed the sale of its Catalyst Services business, which was a non-core business previously included within the Industrial and Field Services segment, for approximately $50.1 million ($48.6 million net of cash divested) subject to customary post-closing conditions. As a result of the sale, the Company recognized during the three and nine months ended September 30, 2016 a pre-tax gain of $16.4 million which is included in gain on sale of business in the Company’s consolidated statement of operations. Inclusive within this gain was $1.5 million of transactional related costs.

The following table presents the carrying amounts of the Company's Catalyst Services business immediately preceding the disposition on September 1, 2016, in thousands:

	September 1, 2016
Total current assets	$	19,135
Property, plant and equipment, net	11,126
Total other assets	6,500
Total assets divested	$	36,761
Total current liabilities	4,040
Total other liabilities	566
Total liabilities divested	$	4,606
Net carrying value divested	$	32,155

The Company evaluated the disposition and determined it did not meet the “major effect” criteria for classification as a discontinued operation largely due to the nature and size of the operations of the disposed of entity. However, the Company determined that the disposition does represent an individually significant component of the Company's business. The following table presents (loss) income attributable to the Catalyst Services business included in the Company's consolidated results of operations for each of the periods shown and through its disposition on September 30, 2016, in thousands:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
	2016		2015	2016	2015
(Loss) income before provision for income taxes	(1,218	)	1,089	290	2,489

XML

INVENTORIES AND SUPPLIES

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

INVENTORIES AND SUPPLIES

INVENTORIES AND SUPPLIES

Inventories and supplies consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Oil and oil products	$	57,403	$	33,603
Supplies and drums	84,133		78,132
Solvent and solutions	8,502		8,868
Modular camp accommodations	15,492		15,126
Other	11,758		13,792
Total inventories and supplies	$	177,288	$	149,521

The increase in oil and oil products as of September 30, 2016 as compared to December 31, 2015 was a result of the Company's recent acquisitions and implementation of its closed loop direct sales model. As of September 30, 2016 and December 31, 2015, other inventories consisted primarily of cleaning fluids, such as absorbents and wipers, and automotive fluids, such as windshield washer fluid and antifreeze.

XML

PROPERTY, PLANT AND EQUIPMENT

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Land	$	122,337	$	100,582
Asset retirement costs (non-landfill)	14,590		12,434
Landfill assets	142,587		136,624
Buildings and improvements	379,435		344,209
Camp equipment	156,838		149,361
Vehicles	535,804		500,619
Equipment	1,465,378		1,328,915
Furniture and fixtures	5,546		5,337
Construction in progress	147,569		113,657
	2,970,084		2,691,738
Less - accumulated depreciation and amortization	1,321,513		1,159,271
Total property, plant and equipment, net	$	1,648,571	$	1,532,467

Interest in the amount of $1.5 million and $4.0 million was capitalized to fixed assets during the three and nine months ended September 30, 2016, respectively. Interest in the amount of $0.6 million and $1.2 million was capitalized to fixed assets during the three and nine months ended September 30, 2015, respectively. Depreciation expense, inclusive of landfill amortization, was $62.6 million and $185.4 million for the three and nine months ended September 30, 2016, respectively. Depreciation expense, inclusive of landfill amortization, was $59.2 million and $175.5 million for the three and nine months ended September 30, 2015, respectively.

XML

GOODWILL AND OTHER INTANGIBLE ASSETS

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

The changes in goodwill for the nine months ended September 30, 2016 were as follows (in thousands):

	Technical Services			Industrial & Field Services			Kleen Performance Products		SK Environmental Services		Lodging Services			Oil and Gas Field Services		Totals
Balance at January 1, 2016	$	49,267		$	105,286		$	49,755	$	216,589	$	32,208		$	—	$	453,105
Acquired from current period acquisitions	8,989			4,925			18,629		17,524		—			—		50,067
Measurement period adjustment from prior period acquisitions	—			—			—		2,095		—			—		2,095
Decrease from disposition of business	—			(4,994		)	—									(4,994		)
Goodwill impairment charge											(34,013		)			(34,013		)
Foreign currency translation and other	(619		)	1,132			98		1,957		1,805			—		4,373
Balance at September 30, 2016	$	57,637		$	106,349		$	68,482	$	238,165	$	—		$	—	$	470,633

The Company assesses goodwill for impairment on an annual basis as of December 31, or at an interim date when events or changes in the business environment would more likely than not reduce the fair value of a reporting unit below its carrying value. The Company conducted the annual impairment test of goodwill for all reporting units as of December 31, 2015 and determined that no adjustment to the carrying value of goodwill for any reporting units was necessary because the fair value of each of the reporting units exceeded that reporting unit's respective carrying value.

As disclosed in the Company’s quarterly report on Form 10-Q for the period ended June 30, 2016, the Company noted that its Lodging reporting unit has been negatively impacted by persistently weak oil and gas prices that have negatively impacted the Western Canadian energy market and that if these economic difficulties persisted, future impairments might be required. During the first and second quarters of 2016, the Company evaluated the reporting unit’s performance along with other business specific and macroeconomic factors and concluded that no interim impairment test was necessary.

During the quarter ended September 30, 2016 certain events and changes in circumstances arose which led management to conclude that the fair value of the Lodging reporting unit was more likely than not less than its carrying value, and therefore an interim goodwill impairment test was performed. The primary events and changes in circumstances which led to this conclusion were:

• Macroeconomic conditions for service companies operating in western Canada’s oil sands region deteriorated in 2016 primarily due to persistently low oil and gas prices. Persistently low prices have caused Lodging’s primary customers to significantly reduce, defer, or cancel oil and gas projects that are in, or had been planned for, this region during periods of more robust commodity pricing.

• Government regulatory delays related to oil and gas pipeline projects have reduced management’s confidence that these projects will move forward in a timely manner or in the form that had been originally contemplated by their planners. These projects represented a significant portion of Lodging’s future growth in terms of the demand for temporary accommodations provided by the Lodging reporting unit. While some of these projects have made recent advancements towards successful government approval, the lack of meaningful progress to date does not provide enough positive evidence that a recovery will be significant enough to improve Lodging’s current forecasted outlook.

• There have been consecutive historical quarters where business results were significantly less than internal forecasts, and previous actual results, for the Lodging reporting unit.

• During the third quarter ended September 30, 2016, management’s near term outlook was clarified in regards to the business’ projections and the impacts of large scale forest fires which took place in the Fort McMurray area of Alberta, Canada where the Company has significant Lodging operations.

• Due to the factors listed above, management significantly lowered its 2016 forecasts and long-range performance relative to the Lodging reporting unit.

In performing Step I of the interim goodwill impairment test, the estimated fair value of the Lodging reporting unit was determined using an income approach with discounted cash flows which were compared to the reporting unit’s carrying value as of September 30, 2016. Based on the results of that evaluation, the carrying amount of the reporting unit, including $34.0 million of goodwill, exceeded Lodging’s estimated fair value and as a result the Company performed Step II of the goodwill impairment test to determine the amount of goodwill impairment that would need to be recognized.

Step II of the goodwill impairment test required the Company to perform a theoretical purchase price allocation for Lodging to determine the implied fair value of its goodwill and then compare that implied fair value to its recorded amount. Estimates and assumptions were used to determine the fair values for Lodging’s long-lived assets in Step II and these involved the use of significant professional judgment on the part of management. The classes of assets that were affected by these estimates and assumptions related most significantly to property, plant, and equipment, goodwill, and intangible assets. Based on the results of this test the implied fair value of goodwill was determined to be $0. Accordingly, the Company recognized a goodwill impairment charge equal to its recorded amount, or $34.0 million, as of September 30, 2016.

The factors contributing to the $34.0 million goodwill impairment charge principally related to events and changes in circumstances discussed above which negatively impacted the Company’s prospective financial information in its discounted cash flow model and the reporting unit's estimated fair value. Lower levels of pricing and an unfavorable change in product mix that reduced expected profit became evident during the third quarter ended September 30, 2016 as management updated the Company's long term projections for the business and as a result decreased the reporting unit’s anticipated future cash flows as compared to those estimated previously. These factors also provided evidence of a longer than expected recovery from current industry lows, which negatively impacted the estimated levels of cash flows in future periods that are assumed in the cash flow model. These factors adversely affected the estimated fair value of the reporting unit and ultimately led to the recognition of the goodwill impairment charge.

As a result of the sale of the Catalyst Services business discussed in Note 4, "Disposition of Business" to the accompanying financial statements, a step 1 goodwill impairment test was also performed relative to the remaining goodwill of $25.1 million in the Industrial Services reporting unit. The results of this test indicated that no impairment of the goodwill exists as of September 30, 2016.

Significant judgments and unobservable inputs categorized as Level III in the fair value hierarchy are inherent in the impairment tests performed and include assumptions about the amount and timing of expected future cash flows, growth rates, and the determination of appropriate discount rates. The Company believes that the assumptions used in its annual and any interim date impairment tests are reasonable, but variations in any of the assumptions may result in different calculations of fair values and impairment charges.

The Company also performed an analysis to determine whether the carrying values of the Lodging segment's finite-lived intangible and other long lived assets may not be entirely recoverable. As of September 30, 2016, the Lodging reporting unit had property, plant and equipment of $99.8 million and other intangible assets of $6.0 million. Based on the analysis performed, sufficient future cash flows are anticipated over those assets' remaining lives to demonstrate recoverability. Thus no impairment charge was recorded related to those other long lived assets.

As of September 30, 2016 and December 31, 2015, the Company's total finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):

	September 30, 2016							December 31, 2015
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	170,194	$	66,510	$	103,684	20.3	$	161,396	$	61,142	$	100,254	19.0
Customer and supplier relationships	389,002		120,922		268,080		12.5	374,866		99,463		275,403		10.1
Other intangible assets	40,266		27,548		12,718		7.8	31,416		22,581		8,835		1.5
Total amortizable permits and other intangible assets	599,462		214,980		384,482		14.4	567,678		183,186		384,492		10.0
Trademarks and trade names	122,855		—		122,855		Indefinite	122,326		—		122,326		Indefinite
Total permits and other intangible assets	$	722,317	$	214,980	$	507,337		$	690,004	$	183,186	$	506,818

Amortization expense of permits and other intangible assets was $10.8 million and $30.3 million for the three and nine months ended September 30, 2016, respectively. Amortization expense of permits and other intangible assets was $9.9 million and $29.7 million for the three and nine months ended September 30, 2015, respectively.

The expected amortization of the net carrying amount of finite-lived intangible assets at September 30, 2016 was as follows (in thousands):

Years Ending December 31,	Expected Amortization
2016 (three months)	$	9,533
2017	35,325
2018	32,345
2019	29,612
2020	27,316
Thereafter	250,351
	$	384,482

XML

ACCRUED EXPENSES

9 Months Ended

Sep. 30, 2016

Payables and Accruals [Abstract]

ACCRUED EXPENSES

ACCRUED EXPENSES

Accrued expenses consisted of the following at September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016		December 31, 2015
Insurance	$	59,254	$	55,899
Interest	21,859		20,500
Accrued compensation and benefits	46,921		35,646
Income, real estate, sales and other taxes	60,020		37,095
Other	38,026		44,520
	$	226,080	$	193,660

XML

CLOSURE AND POST-CLOSURE LIABILITIES

9 Months Ended

Sep. 30, 2016

Asset Retirement Obligation Disclosure [Abstract]

CLOSURE AND POST-CLOSURE LIABILITIES

CLOSURE AND POST-CLOSURE LIABILITIES

The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2016 through September 30, 2016 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2016	$	32,023		$	24,226		$	56,249
Liabilities assumed in acquisitions	—			2,408			2,408
Adjustments during the measurement period related to 2015 acquisitions	—			657			657
New asset retirement obligations	1,650			—			1,650
Accretion	1,996			1,748			3,744
Changes in estimates recorded to statement of operations	(597		)	(114		)	(711		)
Expenditures	(904		)	(709		)	(1,613		)
Currency translation and other	130			53			183
Balance at September 30, 2016	$	34,298		$	28,269		$	62,567

All of the landfill facilities included in the above were active as of September 30, 2016. There were no significant charges (benefits) in 2016 resulting from changes in estimates for closure and post-closure liabilities.

New asset retirement obligations incurred during the first nine months of 2016 were discounted at the credit-adjusted risk-free rate of 6.23%.

XML

REMEDIAL LIABILITIES

9 Months Ended

Sep. 30, 2016

Environmental Remediation Obligations [Abstract]

REMEDIAL LIABILITIES

REMEDIAL LIABILITIES

The changes to remedial liabilities for the nine months ended September 30, 2016 were as follows (in thousands):

	Remedial Liabilities for Landfill Sites			Remedial Liabilities for Inactive Sites			Remedial Liabilities (Including Superfund) for Non-Landfill Operations			Total
Balance at January 1, 2016	$	2,327		$	63,613		$	66,052		$	131,992
Liabilities assumed in acquisition	—			—			4			4
Accretion	82			2,049			1,654			3,785
Changes in estimates recorded to statement of operations	71			(448		)	739			362
Expenditures	(88		)	(2,957		)	(4,716		)	(7,761		)
Currency translation and other	—			45			654			699
Balance at September 30, 2016	$	2,392		$	62,302		$	64,387		$	129,081

In the nine months ended September 30, 2016, there were no significant charges (benefits) resulting from changes in estimates for remedial liabilities.

XML

FINANCING ARRANGEMENTS

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

FINANCING ARRANGEMENTS

FINANCING ARRANGEMENTS

The following table is a summary of the Company’s financing arrangements (in thousands):

	September 30, 2016			December 31, 2015
Senior unsecured notes, at 5.25%, due August 1, 2020 ("2020 Notes")	$	800,000		$	800,000
Senior unsecured notes, at 5.125%, due June 1, 2021 ("2021 Notes")	845,000			595,000
Long-term obligations, at par	$	1,645,000		$	1,395,000
Unamortized debt issuance costs and premium, net	(12,423		)	(12,457		)
Long-term obligations, at carrying value	$	1,632,577		$	1,382,543

At September 30, 2016 and December 31, 2015, the fair value of the Company's 2020 Notes was $824.0 million and $812.0 million, respectively, based on quoted market prices for the instrument. The fair value of the 2020 Notes is considered a Level 2 measure according to the fair value hierarchy.

On March 14, 2016, the Company issued $250.0 million aggregate principal amount as additional notes under the indenture pursuant to which the Company previously issued on December 7, 2012 $600.0 million aggregate principal amount of 2021 Notes. Interest payments are paid semi-annually on June 1 and December 1 of each year. At September 30, 2016 and December 31, 2015, the fair value of the Company's 2021 Notes was $866.1 million and $599.5 million, respectively, based on quoted market prices for the instrument. The fair value of the 2021 Notes is considered a Level 2 measure according to the fair value hierarchy.

The Company also maintains a revolving credit facility which as of September 30, 2016 and December 31, 2015, had no outstanding loan balances. At September 30, 2016, $201.4 million was available to borrow and outstanding letters of credit were $142.0 million. At December 31, 2015, $178.5 million was available to borrow and outstanding letters of credit were $144.6 million.

The revolving credit facility is guaranteed by all of Clean Harbors, Inc.'s ("Parent's") domestic subsidiaries and secured by substantially all of the Parent’s and its domestic subsidiaries’ assets. Available credit for Parent and its domestic subsidiaries is generally limited to 85% of their eligible accounts receivable and 100% of their cash deposited in a controlled account with the agent. Available credit for Parent’s Canadian subsidiaries is generally limited to 85% of their eligible accounts receivable and 100% of their cash deposited in a controlled account with the agent’s Canadian affiliate. The obligations of the Canadian subsidiaries under the revolving credit facility are guaranteed by all of Parent’s Canadian subsidiaries and secured by the accounts receivable of the Canadian subsidiaries, but the Canadian subsidiaries do not guarantee and are not otherwise responsible for the obligations of Parent or its domestic subsidiaries.

On November 1, 2016, the Company entered into an amended and restated credit agreement for its revolving credit facility. Under the amended and restated agreement, the terms are substantially the same as under the prior agreement, but the facility termination date has been extended, subject to certain conditions, until November 1, 2021.

XML

(LOSS) EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

(LOSS) EARNINGS PER SHARE

(LOSS) EARNINGS PER SHARE

The following are computations of basic and diluted (loss) earnings per share (in thousands except for per share amounts):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Numerator for basic and diluted (loss) earnings per share:
Net (loss) income	$	(10,255	)	$	40,228	$	(27,160	)	$	43,534
Denominator:
Basic shares outstanding	57,487			58,161		57,575			58,799
Dilutive effect of equity-based compensation awards	—			107		—			99
Dilutive shares outstanding	57,487			58,268		57,575			58,898
Basic (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74
Diluted (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74

As a result of the net loss reported for the three and nine months ended September 30, 2016, all then outstanding stock options, restricted stock awards and performance awards totaling 835,482 were excluded from the calculation of diluted (loss) earnings per share as their inclusion would have an antidilutive effect. 

For the three and nine months ended September 30, 2015, the dilutive effect of all then outstanding options, restricted stock and performance awards is included in the EPS calculations above except for 274,257 of outstanding performance stock awards for which the performance criteria were not attained at that time and 10,704 and 42,642, respectively, of restricted stock awards which were antidilutive at that time.

XML

ACCUMULATED OTHER COMPREHENSIVE LOSS

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS

ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in accumulated other comprehensive loss by component and related tax effects for the nine months ended September 30, 2016 were as follows (in thousands):    

	Foreign Currency Translation			Unrealized Gains on Available-For-Sale Securities			Unfunded Pension Liability			Total
Balance at January 1, 2016	$	(252,939	)	$	—		$	(1,953	)	$	(254,892	)
Other comprehensive income (loss) before reclassifications	43,706			(596		)	—			43,110
Tax effects	—			238			—			238
Other comprehensive income (loss)	$	43,706		$	(358	)	$	—		$	43,348
Balance at September 30, 2016	$	(209,233	)	$	(358	)	$	(1,953	)	$	(211,544	)

There were no reclassifications out of accumulated other comprehensive loss during the three and nine months ended September 30, 2016 and 2015.

XML

STOCK-BASED COMPENSATION

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION

Total stock-based compensation cost charged to selling, general and administrative expenses for the three and nine months ended September 30, 2016 was $3.0 million and $7.7 million, respectively. Total stock-based compensation cost charged to selling, general and administrative expenses for the three and nine months ended September 30, 2015 was $0.5 million and $6.6 million, respectively. During the three months ended September 30, 2015, the Company reversed $1.4 million of stock based compensation for performance stock awards originally issued in 2014 as management determined it was no longer probable that a portion of the performance targets would be earned. The total income tax benefit recognized in the consolidated statements of operations from stock-based compensation was $0.9 million and $2.3 million for the three and nine months ended September 30, 2016, respectively. The total income tax benefit recognized in the consolidated statements of operations from stock-based compensation was $0.1 million and $1.8 million for the three and nine months ended September 30, 2015, respectively.

Restricted Stock Awards

The following information relates to restricted stock awards that have been granted to employees and directors under the Company's equity incentive plans (the "Plans"). The restricted stock awards are not transferable until vested and the restrictions generally lapse upon the achievement of continued employment over a three-to-five-year period or service as a director until the following annual meeting of shareholders. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant and is amortized to expense over its vesting period.

The following table summarizes information about restricted stock awards for the nine months ended September 30, 2016:

Restricted Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	362,618		$	55.79
Granted	335,992		$	50.87
Vested	(168,565	)	$	54.06
Forfeited	(46,298	)	$	53.04
Balance at September 30, 2016	483,747		$	53.23

As of September 30, 2016, there was $17.2 million of total unrecognized compensation cost arising from restricted stock awards under the Company's Plans. This cost is expected to be recognized over a weighted average period of 3.0 years. The total fair value of restricted stock vested during the three and nine months ended September 30, 2016 was $1.8 million and $7.9 million, respectively. The total fair value of restricted stock vested during the three and nine months ended September 30, 2015 was $0.6 million and $6.8 million, respectively.

Performance Stock Awards

The following information relates to performance stock awards that have been granted to employees under the Company's Plans. Performance stock awards are subject to performance criteria established by the compensation committee of the Company's board of directors prior to or at the date of grant. The vesting of the performance stock awards is based on achieving such targets typically based on revenue, Adjusted EBITDA margin, return on invested capital percentage and Total Recordable Incident Rate. In addition, performance stock awards include continued service conditions. The fair value of each performance stock award is based on the closing price of the Company's common stock on the date of grant and is amortized to expense over the service period if achievement of performance measures is considered probable.

The following table summarizes information about performance stock awards for the nine months ended September 30, 2016:

Performance Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	187,274		$	57.13
Granted	207,624		$	54.21
Vested	(8,420	)	$	61.90
Forfeited	(33,469	)	$	55.96
Balance at September 30, 2016	353,009		$	55.39

As of September 30, 2016, there was $0.2 million of total unrecognized compensation cost arising from unvested performance stock awards deemed probable of vesting under the Company's Plans. No performance awards vested during the three months ended September 30, 2016. The total fair value of performance awards vested during the nine months ended September 30, 2016 was $0.4 million. The total fair value of performance awards vested during the nine months ended September 30, 2015 was $0.3 million. No performance awards vested during the three months ended September 30, 2015.

Common Stock Repurchases

On March 13, 2015, the Company's board of directors authorized the repurchase of up to $300 million of the Company's common stock. During the three and nine months ended September 30, 2016, the Company repurchased and retired a total of 0.1 million shares and 0.3 million shares, respectively, of the Company's common stock for a total cost of $6.2 million and $16.3 million, respectively. During the three and nine months ended September 30, 2015, the Company repurchased and retired a total of 0.8 million shares and 1.3 million shares, respectively, of the Company's common stock for a total cost of $37.6 million and $69.8 million, respectively. Through September 30, 2016, the Company has repurchased and retired a total of 3.7 million shares of the Company's common stock for a total cost of $194.0 million under this program. As of September 30, 2016, an additional $106.0 million remains available for repurchase of shares under the current authorized program.

XML

COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Legal and Administrative Proceedings

The Company and its subsidiaries are subject to legal proceedings and claims arising in the ordinary course of business. Actions filed against the Company arise from commercial and employment-related claims including alleged class actions related to sales practices and wage and hour claims. The plaintiffs in these actions may be seeking damages or injunctive relief or both. These actions are in various jurisdictions and stages of proceedings, and some are covered in part by insurance. In addition, the Company’s waste management services operations are regulated by federal, state, provincial and local laws enacted to regulate discharge of materials into the environment, remediation of contaminated soil and groundwater or otherwise protect the environment. This ongoing regulation results in the Company frequently becoming a party to legal or administrative proceedings involving all levels of governmental authorities and other interested parties. The issues involved in such proceedings generally relate to alleged violations of existing permits and licenses or alleged responsibility under federal or state Superfund laws to remediate contamination at properties owned either by the Company or by other parties (“third party sites”) to which either the Company or the prior owners of certain of the Company’s facilities shipped wastes.

At September 30, 2016 and December 31, 2015, the Company had recorded reserves of $20.9 million and $21.9 million, respectively, in the Company's financial statements for actual or probable liabilities related to the legal and administrative proceedings in which the Company was then involved, the principal of which are described below. At September 30, 2016 and December 31, 2015, the Company also believed that it was reasonably possible that the amount of these potential liabilities could be as much as $1.8 million and $1.9 million more, respectively. The Company periodically adjusts the aggregate amount of these reserves when actual or probable liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or probable claims becomes available. As of September 30, 2016 and December 31, 2015, the $20.9 million and $21.9 million, respectively, of reserves consisted of (i) $18.3 million and $18.9 million, respectively, related to pending legal or administrative proceedings, including Superfund liabilities, which were included in remedial liabilities on the consolidated balance sheets, and (ii) $2.6 million and $3.0 million, respectively, primarily related to federal, state and provincial enforcement actions, which were included in accrued expenses on the consolidated balance sheets.

As of September 30, 2016, the principal legal and administrative proceedings in which the Company was involved, or which had been terminated during 2016, were as follows:

Ville Mercier.    In September 2002, the Company acquired the stock of a subsidiary (the "Mercier Subsidiary") which owns a hazardous waste incinerator in Ville Mercier, Quebec (the "Mercier Facility"). The property adjacent to the Mercier Facility, which is also owned by the Mercier Subsidiary, is now contaminated as a result of actions dating back to 1968, when the Government of Quebec issued to a company unrelated to the Mercier Subsidiary two permits to dump organic liquids into lagoons on the property. In 1999, Ville Mercier and three neighboring municipalities filed separate legal proceedings against the Mercier Subsidiary and the Government of Quebec. In 2012, the municipalities amended their existing statement of claim to seek $2.9 million (Cdn) in general damages and $10.0 million (Cdn) in punitive damages, plus interest and costs, as well as injunctive relief. Both the Government of Quebec and the Company have filed summary judgment motions against the municipalities. The parties are currently attempting to negotiate a resolution and hearings on the motions have been delayed. In September 2007, the Quebec Minister of Sustainable Development, Environment and Parks issued a Notice pursuant to Section 115.1 of the Environment Quality Act, superseding Notices issued in 1992, which are the subject of the pending litigation. The more recent Notice notifies the Mercier Subsidiary that, if the Mercier Subsidiary does not take certain remedial measures at the site, the Minister intends to undertake those measures at the site and claim direct and indirect costs related to such measures. The Company has accrued for costs expected to be incurred relative to the resolution of this matter and believes this matter will not have a future material effect on its financial position or results of operations.

Safety-Kleen Legal Proceedings. On December 28, 2012, the Company acquired Safety-Kleen, Inc. ("Safety-Kleen") and thereby became subject to the legal proceedings in which Safety-Kleen was a party on that date. In addition to certain Superfund proceedings in which Safety-Kleen has been named as a potentially responsible party as described below under “Superfund Proceedings,” the principal such legal proceedings involving Safety-Kleen which were outstanding as of September 30, 2016 were as follows:

Product Liability Cases. Safety-Kleen has been named as a defendant in various lawsuits that are currently pending in various courts and jurisdictions throughout the United States, including approximately 62 proceedings (excluding cases which have been settled but not formally dismissed) as of September 30, 2016, wherein persons claim personal injury resulting from the use of Safety-Kleen's parts cleaning equipment or cleaning products. These proceedings typically involve allegations that the solvent used in Safety-Kleen's parts cleaning equipment contains contaminants and/or that Safety-Kleen's recycling process does not effectively remove the contaminants that become entrained in the solvent during their use. In addition, certain claimants assert that Safety-Kleen failed to warn adequately the product user of potential risks, including an historic failure to warn that solvent contains trace amounts of toxic or hazardous substances such as benzene.

Safety-Kleen maintains insurance that it believes will provide coverage for these product liability claims (over amounts accrued for self-insured retentions and deductibles in certain limited cases), except for punitive damages to the extent not insurable under state law or excluded from insurance coverage. Safety-Kleen also believes that these claims lack merit and has historically vigorously defended, and intends to continue to vigorously defend, itself and the safety of its products against all of these claims. Such matters are subject to many uncertainties and outcomes are not predictable with assurance. Consequently, Safety-Kleen is unable to ascertain the ultimate aggregate amount of monetary liability or financial impact with respect to these matters as of September 30, 2016. From January 1, 2016 to September 30, 2016, 18 product liability claims were settled or dismissed. Due to the nature of these claims and the related insurance, the Company did not incur any expense as Safety-Kleen's insurance provided coverage in full for all such claims. Safety-Kleen may be named in similar, additional lawsuits in the future, including claims for which insurance coverage may not be available.    

Superfund Proceedings

The Company has been notified that either the Company (which, since December 28, 2012, includes Safety-Kleen) or the prior owners of certain of the Company's facilities for which the Company may have certain indemnification obligations have been identified as potentially responsible parties ("PRPs") or potential PRPs in connection with 129 sites which are subject to or are proposed to become subject to proceedings under federal or state Superfund laws. Of the 129 sites, three (including the BR Facility described below) involve facilities that are now owned or leased by the Company and 126 involve third party sites to which either the Company or the prior owners of certain of the Company’s facilities shipped wastes. Of the 126 third party sites, 32 are now settled, 17 are currently requiring expenditures on remediation and 77 are not currently requiring expenditures on remediation.

In connection with each site, the Company has estimated the extent, if any, to which it may be subject, either directly or as a result of any indemnification obligations, for cleanup and remediation costs, related legal and consulting costs associated with PRP investigations, settlements, and related legal and administrative proceedings. The amount of such actual and potential liability is inherently difficult to estimate because of, among other relevant factors, uncertainties as to the legal liability (if any) of the Company or the prior owners of certain of the Company's facilities to contribute a portion of the cleanup costs, the assumptions that must be made in calculating the estimated cost and timing of remediation, the identification of other PRPs and their respective capability and obligation to contribute to remediation efforts, and the existence and legal standing of indemnification agreements (if any) with prior owners, which may either benefit the Company or subject the Company to potential indemnification obligations. Clean Harbors believes its potential liability could exceed $100,000 at 11 of the 126 third party sites.

BR Facility.    The Company acquired in 2002 a former hazardous waste incinerator and landfill in Baton Rouge (the "BR Facility"), for which operations had been previously discontinued by the prior owner. In September 2007, the EPA issued a special notice letter to the Company related to the Devil's Swamp Lake Site ("Devil's Swamp") in East Baton Rouge Parish, Louisiana. Devil's Swamp includes a lake located downstream of an outfall ditch where wastewater and storm water have been discharged, and Devil's Swamp is proposed to be included on the National Priorities List due to the presence of Contaminants of Concern ("COC") cited by the EPA. These COCs include substances of the kind found in wastewater and storm water discharged from the BR Facility in past operations. The EPA originally requested COC generators to submit a good faith offer to conduct a remedial investigation feasibility study directed towards the eventual remediation of the site. The Company is currently performing corrective actions at the BR Facility under an order issued by the Louisiana Department of Environmental Quality, and has begun conducting the remedial investigation and feasibility study under an order issued by the EPA. The Company cannot presently estimate the potential additional liability for the Devil's Swamp cleanup until a final remedy is selected by the EPA.

Third Party Sites.    Of the 126 third party sites at which the Company has been notified it is a PRP or potential PRP or may have indemnification obligations, Clean Harbors has an indemnification agreement at 11 of these sites with ChemWaste, a former subsidiary of Waste Management, Inc., and at six additional of these third party sites, Safety-Kleen has a similar indemnification agreement with McKesson Corporation. These agreements indemnify the Company (which now includes Safety-Kleen) with respect to any liability at the 17 sites for waste disposed prior to the Company's (or Safety-Kleen's) acquisition of the former subsidiaries of Waste Management or McKesson which had shipped wastes to those sites. Accordingly, Waste Management and McKesson are paying all costs of defending those subsidiaries in those 17 cases, including legal fees and settlement costs. However, there can be no guarantee that the Company's ultimate liabilities for those sites will not exceed the amount recorded or that indemnities applicable to any of these sites will be available to pay all or a portion of related costs. Except for the indemnification agreements which the Company holds from ChemWaste, McKesson and one other entity, the Company does not have an indemnity agreement with respect to any of the 126 third party sites discussed above.

Federal, State and Provincial Enforcement Actions

From time to time, the Company pays fines or penalties in regulatory proceedings relating primarily to waste treatment, storage or disposal facilities. As of September 30, 2016 and December 31, 2015, there were five and six proceedings, respectively, for which the Company reasonably believed that the sanctions could equal or exceed $100,000. The Company believes that the fines or other penalties in these or any of the other regulatory proceedings will, individually or in the aggregate, not have a material effect on its financial condition, results of operations or cash flows.

XML

INCOME TAXES

9 Months Ended

Sep. 30, 2016

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The Company records a tax provision or benefit on an interim basis using an estimated annual effective tax rate. This rate is applied to the current period ordinary income or loss to determine the income tax provision or benefit allocated to the interim period. Losses from jurisdictions for which no benefit can be recognized and the income tax effects of unusual or infrequent items are excluded from the estimated annual effective tax rate and are recognized in the impacted interim period. The estimated annual effective tax rate may be significantly impacted by projected earnings mix by tax jurisdiction. Adjustments to the estimated annual effective income tax rate are recognized in the period when such estimates are revised.

The Company did not record any tax charges or benefits as a result of the goodwill impairment charges recorded in the third quarter of 2016 and in the second quarter of 2015. Absent the impact of the impairment charges on pre-tax income from operations the Company’s effective tax rate for the three and nine months ended September 30, 2016 was 47.8% and 80.3% compared to 46.2% and 44.4%, respectively, for the same periods in 2015. The variations in the effective income tax rates for the three and nine months ended September 30, 2016 as compared to more customary relationships between pre-tax income and the provision for income taxes were primarily due to the Company not recognizing income tax benefits from current operating losses related to certain Canadian entities as well as the impacts of the non-deductible goodwill impairment charge.

As of September 30, 2016 and December 31, 2015, the Company had recorded $1.8 million and $2.1 million, respectively, of liabilities for unrecognized tax benefits and $0.3 million and $0.4 million of interest, respectively.

Due to expiring statute of limitation periods, the Company believes that total unrecognized tax benefits will not decrease within the next 12 months.

XML

SEGMENT REPORTING

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

SEGMENT REPORTING

SEGMENT REPORTING

Segment reporting is prepared on the same basis that the Company's chief executive officer, who is the Company's chief operating decision maker, manages the business, makes operating decisions and assesses performance. As of September 30, 2016, the Company's operations were managed in six reportable segments based primarily upon the nature of the various operations and services provided: Technical Services, Industrial and Field Services which consists of the Industrial Services and Field Services operating segments, Kleen Performance Products, SK Environmental Services, Lodging Services and Oil and Gas Field Services.

Third party revenue is revenue billed to outside customers by a particular segment. Direct revenue is revenue allocated to the segment providing the product or service. Intersegment revenues represent the sharing of third party revenues among the segments based on products and services provided by each segment as if the products and services were sold directly to the third party. The intersegment revenues are shown net. The negative intersegment revenues are due to more transfers out of customer revenues to other segments than transfers in of customer revenues from other segments. The operations not managed through the Company’s six reportable segments are recorded as “Corporate Items.” Corporate Items revenues consist of certain operations for which the revenues are insignificant and not allocated to the segments for internal reporting purposes. Corporate Items cost of revenues represents certain central services that are not allocated to the six segments for internal reporting purposes. Corporate Items selling, general and administrative expenses include typical corporate items such as legal, accounting and other items of a general corporate nature that are not allocated to the Company’s six reportable segments. Performance of the segments is evaluated on several factors, of which the primary financial measure is “Adjusted EBITDA,” which consists of net (loss) income plus accretion of environmental liabilities, depreciation and amortization, net interest expense, provision for income taxes, other non-cash charges not deemed representative of fundamental segment results and excludes other expense. Transactions between the segments are accounted for at the Company’s best estimate based on similar transactions with outside customers. 

The following table reconciles third party revenues to direct revenues for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	For the Three Months Ended September 30, 2016											For the Three Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues			Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	232,482	$	38,795		$	492		$	271,769		$	253,069	$	34,819		$	506		$	288,394
Industrial and Field Services	162,118		(12,734		)	(32		)	149,352			307,226		(6,973		)	(313		)	299,940
Kleen Performance Products	102,318		(9,761		)	—			92,557			100,827		(23,744		)	(6		)	77,077
SK Environmental Services	194,764		(18,955		)	1			175,810			171,832		(5,947		)	2			165,887
Lodging Services	15,520		233			19			15,772			13,507		743			30			14,280
Oil and Gas Field Services	22,197		2,422			86			24,705			46,788		1,102			92			47,982
Corporate Items	121		—			(566		)	(445		)	117		—			(311		)	(194		)
Total	$	729,520	$	—		$	—		$	729,520		$	893,366	$	—		$	—		$	893,366

	For the Nine Months Ended September 30, 2016										For the Nine Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues		Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	680,717	$	109,217		$	1,547		$	791,481	$	741,419	$	108,037		$	2,886		$	852,342
Industrial and Field Services	437,546		(29,255		)	(335		)	407,956		807,423		(24,764		)	(636		)	782,023
Kleen Performance Products	256,572		(26,768		)	(1		)	229,803		296,738		(63,429		)	(8		)	233,301
SK Environmental Services	565,186		(59,561		)	369			505,994		508,392		(26,331		)	5			482,066
Lodging Services	47,583		634			54			48,271		68,782		1,899			127			70,808
Oil and Gas Field Services	73,445		5,733			221			79,399		138,992		4,588			141			143,721
Corporate Items	2,064		—			(1,855		)	209		347		—			(2,515		)	(2,168		)
Total	$	2,063,113	$	—		$	—		$	2,063,113	$	2,562,093	$	—		$	—		$	2,562,093

The following table presents Adjusted EBITDA information used by management by reported segment (in thousands). The Company does not allocate interest expense, income taxes, depreciation, amortization, accretion of environmental liabilities, other non-cash charges not deemed representative of fundamental segment results, and other expense (income) to its segments.    

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Adjusted EBITDA:
Technical Services	$	72,333		$	79,048		$	201,622		$	219,257
Industrial and Field Services	18,579			62,460			40,643			145,850
Kleen Performance Products	22,803			12,123			37,358			23,471
SK Environmental Services	47,250			40,096			127,984			108,540
Lodging Services	4,104			1,827			8,145			12,589
Oil and Gas Field Services	(4,425		)	1,579			(10,026		)	800
Corporate Items	(33,993		)	(31,526		)	(101,310		)	(103,501		)
Total	$	126,651		$	165,607		$	304,416		$	407,006
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	2,476			2,577			7,529			7,795
Depreciation and amortization	73,360			69,060			215,655			205,189
Goodwill impairment charge	34,013			—			34,013			31,992
Income from operations	16,802			93,970			47,219			162,030
Other expense	198			139			737			390
Gain on sale of business	(16,431		)	—			(16,431		)	—
Interest expense, net of interest income	21,565			19,017			62,192			57,704
Income before provision for income taxes	$	11,470		$	74,814		$	721		$	103,936

The following table presents certain assets by reportable segment and in the aggregate (in thousands):

	September 30, 2016
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	521,040	$	211,712	$	260,608	$	328,655	$	99,764	$	139,137	$	87,655	$	1,648,571
Goodwill	57,637		106,349		68,482		238,165		—		—		—		470,633
Permits and other intangibles, net	74,646		11,490		141,039		264,864		5,951		9,347		—		507,337
Total assets	$	859,794	$	366,929	$	605,160	$	920,333	$	142,948	$	229,480	$	587,969	$	3,712,613

	December 31, 2015
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	483,425	$	237,660	$	193,855	$	264,539	$	105,208	$	156,286	$	91,494	$	1,532,467
Goodwill	49,267		105,286		49,755		216,589		32,208		—		—		453,105
Permits and other intangibles, net	73,601		14,649		140,410		256,251		7,045		14,862		—		506,818
Total assets	$	800,060	$	368,858	$	492,483	$	805,488	$	181,357	$	244,210	$	538,972	$	3,431,428

The following table presents total assets by geographical area (in thousands):

	September 30, 2016		December 31, 2015
United States	$	2,944,936	$	2,575,746
Canada	767,677		851,949
Other foreign	—		3,733
Total	$	3,712,613	$	3,431,428

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION

9 Months Ended

Sep. 30, 2016

Guarantor and Non-Guarantor Subsidiaries Financial Information [Abstract]

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION

The 2020 Notes and the 2021 Notes are guaranteed by substantially all of the Company's subsidiaries organized in the United States (the "U.S. Guarantor Subsidiaries"). Each U.S. Guarantor Subsidiary is a 100% owned subsidiary of Clean Harbors, Inc. ("Parent") and its guarantee is both full and unconditional and joint and several.  The guarantees, are however, subject to customary release provisions under which, in particular, the guarantee of any U.S. Guarantor Subsidiary will be released if the Company sells such subsidiary to an unrelated third party in accordance with the terms of the indenture which governs the notes. The 2020 Notes and the 2021 Notes are not guaranteed by Parent's Canadian or other foreign subsidiaries (the "Foreign Non-Guarantor Subsidiaries"). The following presents supplemental condensed consolidating financial information for Parent, the U.S. Guarantor Subsidiaries and the Foreign Non-Guarantor Subsidiaries, respectively.

As discussed further in Note 11, “Financing Arrangements,” to the Company's consolidated financial statements included herein, on March 14, 2016, Parent issued $250.0 million aggregate principal amount of additional 2021 Notes. In connection with this offering, the proceeds were then transferred to the US Guarantor Subsidiaries and are reflected as an investment of Parent in the U.S. Guarantor Subsidiaries for the period ending September 30, 2016.

Following is the condensed consolidating balance sheet at September 30, 2016 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	51,334	$	170,183	$	36,340	$	—		$	257,857
Intercompany receivables	190,728		300,656		34,665		(526,049		)	—
Accounts receivable, net	—		418,170		94,206		—			512,376
Other current assets	2,537		207,488		69,673		—			279,698
Property, plant and equipment, net	—		1,217,704		430,867		—			1,648,571
Investments in subsidiaries	2,813,894		488,437		—		(3,302,331		)	—
Intercompany debt receivable	—		212,171		3,701		(215,872		)	—
Goodwill	—		417,992		52,641		—			470,633
Permits and other intangibles, net	—		439,543		67,794		—			507,337
Other long-term assets	1,197		9,552		25,392		—			36,141
Total assets	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613
Liabilities and Stockholders’ Equity:
Current liabilities	$	22,619	$	438,298	$	78,179	$	—		$	539,096
Intercompany payables	299,848		224,593		1,608		(526,049		)	—
Closure, post-closure and remedial liabilities, net	—		155,710		15,721		—			171,431
Long-term obligations	1,632,577		—		—		—			1,632,577
Intercompany debt payable	3,701		—		212,171		(215,872		)	—
Other long-term liabilities	—		249,401		19,163		—			268,564
Total liabilities	1,958,745		1,068,002		326,842		(741,921		)	2,611,668
Stockholders’ equity	1,100,945		2,813,894		488,437		(3,302,331		)	1,100,945
Total liabilities and stockholders’ equity	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613

Following is the condensed consolidating balance sheet at December 31, 2015 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	11,017	$	83,479	$	90,212	$	—		$	184,708
Intercompany receivables	164,709		213,243		39,804		(417,756		)	—
Accounts receivables, net	—		404,580		91,424		—			496,004
Other current assets	—		179,969		60,515		—			240,484
Property, plant and equipment, net	—		1,082,466		450,001		—			1,532,467
Investments in subsidiaries	2,547,307		522,067		—		(3,069,374		)	—
Intercompany debt receivable	—		260,957		3,701		(264,658		)	—
Goodwill	—		367,306		85,799		—			453,105
Permits and other intangibles, net	—		435,080		71,738		—			506,818
Other long-term assets	1,068		10,274		6,500		—			17,842
Total assets	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428
Liabilities and Stockholders’ Equity:
Current liabilities	$	20,813	$	424,588	$	71,719	$	—		$	517,120
Intercompany payables	220,762		195,287		1,707		(417,756		)	—
Closure, post-closure and remedial liabilities, net	—		153,190		14,656		—			167,846
Long-term obligations	1,382,543		—		—		—			1,382,543
Intercompany debt payable	3,701		—		260,957		(264,658		)	—
Other long-term liabilities	—		239,049		28,588		—			267,637
Total liabilities	1,627,819		1,012,114		377,627		(682,414		)	2,335,146
Stockholders’ equity	1,096,282		2,547,307		522,067		(3,069,374		)	1,096,282
Total liabilities and stockholders’ equity	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428

Following is the consolidating statement of operations for the three months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	461,139		$	145,780		$	(12,694	)	$	594,225
Product revenues	—			118,106			20,072			(2,883		)	135,295
Total revenues	—			579,245			165,852			(15,577		)	729,520
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(598		)	288,764			110,070			(12,694		)	385,542
Product cost of revenues	—			94,050			15,206			(2,883		)	106,373
Total cost of revenues	(598		)	382,814			125,276			(15,577		)	491,915
Selling, general and administrative expenses	23			88,652			22,279			—			110,954
Accretion of environmental liabilities	—			2,243			233			—			2,476
Depreciation and amortization	—			51,957			21,403			—			73,360
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	575			53,579			(37,352		)	—			16,802
Other expense	—			(188		)	(10		)	—			(198		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(23,042		)	1,456			21			—			(21,565		)
Equity in earnings of subsidiaries, net of taxes	3,225			(22,341		)	—			19,116			—
Intercompany interest income (expense)	—			5,235			(5,235		)	—			—
(Loss) income before (benefit) provision for income taxes	(19,242		)	39,029			(27,433		)	19,116			11,470
(Benefit) provision for income taxes	(8,987		)	35,803			(5,091		)	—			21,725
Net (loss) income	(10,255		)	3,226			(22,342		)	19,116			(10,255		)
Other comprehensive loss	(1,311		)	(1,311		)	(3,927		)	5,238			(1,311		)
Comprehensive (loss) income	$	(11,566	)	$	1,915		$	(26,269	)	$	24,354		$	(11,566	)

Following is the consolidating statement of operations for the three months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	612,814		$	162,680		$	(14,827	)	$	760,667
Product revenues	—			117,653			17,591			(2,545		)	132,699
Total revenues	—			730,467			180,271			(17,372		)	893,366
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			413,878			124,625			(14,827		)	523,676
Product cost of revenues	—			101,778			11,737			(2,545		)	110,970
Total cost of revenues	—			515,656			136,362			(17,372		)	634,646
Selling, general and administrative expenses	25			72,811			20,277			—			93,113
Accretion of environmental liabilities	—			2,277			300			—			2,577
Depreciation and amortization	—			46,951			22,109			—			69,060
(Loss) income from operations	(25		)	92,772			1,223			—			93,970
Other income (expense)	—			204			(343		)	—			(139		)
Interest (expense) income	(19,671		)	613			41			—			(19,017		)
Equity in earnings of subsidiaries, net of taxes	52,046			(2,341		)	—			(49,705		)	—
Intercompany interest income (expense)	—			5,666			(5,666		)	—			—
Income (loss) before (benefit) provision for income taxes	32,350			96,914			(4,745		)	(49,705		)	74,814
(Benefit) provision for income taxes	(7,878		)	44,868			(2,404		)	—			34,586
Net income (loss)	40,228			52,046			(2,341		)	(49,705		)	40,228
Other comprehensive loss	(53,541		)	(53,541		)	(34,150		)	87,691			(53,541		)
Comprehensive loss	$	(13,313	)	$	(1,495	)	$	(36,491	)	$	37,986		$	(13,313	)

Following is the consolidating statement of operations for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,345,629		$	399,216		$	(35,827	)	$	1,709,018
Product revenues	—			303,342			58,176			(7,423		)	354,095
Total revenues	—			1,648,971			457,392			(43,250		)	2,063,113
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(1,185		)	864,071			321,153			(35,827		)	1,148,212
Product cost of revenues	—			252,512			42,895			(7,423		)	287,984
Total cost of revenues	(1,185		)	1,116,583			364,048			(43,250		)	1,436,196
Selling, general and administrative expenses	84			253,189			69,228			—			322,501
Accretion of environmental liabilities	—			6,846			683			—			7,529
Depreciation and amortization	—			151,348			64,307			—			215,655
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	1,101			121,005			(74,887		)	—			47,219
Other income (expense)	—			124			(861		)	—			(737		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(66,147		)	3,851			104			—			(62,192		)
Equity in earnings of subsidiaries, net of taxes	11,867			(58,031		)	—			46,164			—
Intercompany interest income (expense)	—			15,891			(15,891		)	—			—
(Loss) income before (benefit) provision for income taxes	(53,179		)	84,128			(76,392		)	46,164			721
(Benefit) provision for income taxes	(26,019		)	72,260			(18,360		)	—			27,881
Net (loss) income	(27,160		)	11,868			(58,032		)	46,164			(27,160		)
Other comprehensive gain	43,348			43,348			24,403			(67,751		)	43,348
Comprehensive gain (loss)	$	16,188		$	55,216		$	(33,629	)	$	(21,587	)	$	16,188

Following is the consolidating statement of operations for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,659,739		$	546,790		$	(48,185	)	$	2,158,344
Product revenues	—			349,524			63,239			(9,014		)	403,749
Total revenues	—			2,009,263			610,029			(57,199		)	2,562,093
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			1,106,591			426,530			(48,185		)	1,484,936
Product cost of revenues	—			315,322			42,597			(9,014		)	348,905
Total cost of revenues	—			1,421,913			469,127			(57,199		)	1,833,841
Selling, general and administrative expenses	75			247,472			73,699			—			321,246
Accretion of environmental liabilities	—			6,870			925			—			7,795
Depreciation and amortization	—			137,354			67,835			—			205,189
Goodwill impairment charge	—			4,164			27,828			—			31,992
(Loss) income from operations	(75		)	191,490			(29,385		)	—			162,030
Other income (expense)	—			483			(873		)	—			(390		)
Interest (expense) income	(58,962		)	1,115			143			—			(57,704		)
Equity in earnings of subsidiaries, net of taxes	78,956			(38,920		)	—			(40,036		)	—
Intercompany interest income (expense)	—			17,679			(17,679		)	—			—
Income (loss) before (benefit) provision for income taxes	19,919			171,847			(47,794		)	(40,036		)	103,936
(Benefit) provision for income taxes	(23,615		)	92,891			(8,874		)	—			60,402
Net income (loss)	43,534			78,956			(38,920		)	(40,036		)	43,534
Other comprehensive loss	(118,713		)	(118,713		)	(76,752		)	195,465			(118,713		)
Comprehensive loss	$	(75,179	)	$	(39,757	)	$	(115,672	)	$	155,429		$	(75,179	)

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from (used in) operating activities	$	43,033		$	128,182		$	7,612		$	—		$	178,827
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(152,836		)	(22,512		)	—			(175,348		)
Proceeds from sales of fixed assets	—			950			3,032			—			3,982
Acquisitions, net of cash acquired	—			(197,089		)	(10,000		)	—			(207,089		)
Proceeds on sale of business	—			18,885			28,249			—			47,134
Costs to obtain or renew permits	—			(949		)	(971		)	—			(1,920		)
Purchase of available-for-sale securities	(102		)	—			(496		)	—			(598		)
Investment in subsidiaries	(250,625		)	—			—			250,625			—
Intercompany	—			(18,118		)	—			18,118			—
Net cash used in investing activities	(250,727		)	(349,157		)	(2,698		)	268,743			(333,839		)
Cash flows from (used in) financing activities:
Change in uncashed checks	—			(6,064		)	(1,020		)	—			(7,084		)
Exercise of stock options	230			—			—			—			230
Issuance of restricted shares, net of shares remitted	(2,500		)	—			—			—			(2,500		)
Repurchases of common stock	(15,869		)	—			—			—			(15,869		)
Excess tax benefit of stock-based compensation	21			—			—			—			21
Deferred financing costs paid	(2,614		)	—			—			—			(2,614		)
Issuance of senior secured notes, including premium	250,625			250,625			—			(250,625		)	250,625
Intercompany	18,118			—			—			(18,118		)	—
Intercompany debt	—			63,118			(63,118		)	—			—
Net cash from (used in) financing activities	248,011			307,679			(64,138		)	(268,743		)	222,809
Effect of exchange rate change on cash	—			—			5,352			—			5,352
Increase (decrease) in cash and cash equivalents	40,317			86,704			(53,872		)	—			73,149
Cash and cash equivalents, beginning of period	11,017			83,479			90,212			—			184,708
Cash and cash equivalents, end of period	$	51,334		$	170,183		$	36,340		$	—		$	257,857

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from operating activities	$	9,503		$	240,713		$	59,377		$	—		$	309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(162,329		)	(27,670		)	—			(189,999		)
Proceeds from sale of fixed assets	—			1,177			2,563			—			3,740
Acquisitions, net of cash acquired	—			(79,610		)	—			—			(79,610		)
Costs to obtain or renew permits	—			(4		)	(4,629		)	—			(4,633		)
Intercompany	—			(71,182		)	—			71,182			—
Net cash used in investing activities	—			(311,948		)	(29,736		)	71,182			(270,502		)
Cash flows used in financing activities:
Change in uncashed checks	—			(16,635		)	(5,247		)	—			(21,882		)
Proceeds from exercise of stock options	397			—			—			—			397
Issuance of restricted shares, net of shares remitted	(2,027		)	—			—			—			(2,027		)
Repurchases of common stock	(69,155		)	—			—			—			(69,155		)
Excess tax benefit of stock-based compensation	102			—			—			—			102
Payments of capital leases	—			(203		)	(297		)	—			(500		)
Intercompany	71,182			—			—			(71,182		)	—
Net cash from (used in) financing activities	499			(16,838		)	(5,544		)	(71,182		)	(93,065		)
Effect of exchange rate change on cash	—			—			(13,714		)	—			(13,714		)
Increase (decrease) in cash and cash equivalents	10,002			(88,073		)	10,383			—			(67,688		)
Cash and cash equivalents, beginning of period	1,006			154,147			91,726			—			246,879
Cash and cash equivalents, end of period	$	11,008		$	66,074		$	102,109		$	—		$	179,191

XML

SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Standards implemented

In February 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2015-02, Consolidation (Topic 810). The amendment provides guidance regarding amendments to the consolidation analysis. The adoption of ASU 2015-02 as of January 1, 2016 did not have an impact on the Company's consolidated financial statements.

In September 2015, FASB issued ASU 2015-16, Business Combinations (Topic 805). The amendment provides guidance to simplify the accounting for adjustments made to provisional amounts recognized in a business combination. This amendment eliminates the requirement to retrospectively account for those adjustments. ASU 2015-16 is applied prospectively to adjustments to provisional amounts that occur after the effective date of this update. The adoption of ASU 2015-16 as of January 1, 2016 did not have a material impact on the Company's consolidated financial statements.

Standards to be implemented

The Company is currently evaluating the impact that the below standards to be implemented will have on the Company's consolidated financial statements.

In February 2016, FASB issued ASU 2016-02, Leases (Topic 842). The amendment increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 should be applied using a modified retrospective approach and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2018.

In March 2016, FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606). ASU 2016-08 reduces the potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718). The amendment simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 allows for retrospective or prospective application and early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016.

In April 2016, FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606). ASU 2016-10 reduces the potential for diversity in initial application, as well as the cost and complexity of applying Topic 606 both at transition and on an ongoing basis. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In May 2016, FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606). ASU 2016-12 provided narrow scope improvements and practical expedients on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition. The effective date and transition requirements for the amendments in this update are the same as the effective date and transition requirements of Update 2014-09, Revenue from Contracts with Customers (Topic 606).

In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force). The amendment provides updated guidance on eight specific cash flow issues, including debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from settlement of insurance claims and corporate-owned life insurance, distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. Early adoption is permitted. The amendments in this update are effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2017.

XML

BUSINESS COMBINATIONS (Tables)

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

The following table summarizes the recognized amounts of assets acquired and liabilities assumed at April 11, 2015 (in thousands):

	Preliminary Allocations			Measurement Period Adjustments			Final Allocations
Accounts receivable	$	7,109		$	192		$	7,301
Inventories and supplies	1,791			—			1,791
Prepaid and other current assets	1,749			(1,084		)	665
Property, plant and equipment	30,468			(2,827		)	27,641
Permits and other intangibles	20,000			(1,900		)	18,100
Current liabilities	(5,859		)	(25		)	(5,884		)
Closure and post-closure liabilities	(1,676		)	(657		)	(2,333		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(13,081		)	3,907			(9,174		)
Total identifiable net assets	40,501			(2,394		)	38,107
Goodwill	36,591			4,638			41,229
Total purchase price, net of cash acquired	$	77,092		$	2,244		$	79,336

The components and preliminary allocation of the purchase price consist of the following amounts (in thousands):

	At Acquisition Dates			Measurement Period Adjustments			At Acquisition Dates As Reported September 30, 2016
Accounts receivable	$	17,384		$	(1,016	)	$	16,368
Inventories and supplies	13,859			(1,071		)	12,788
Prepaid expenses and other current assets	920			9			929
Property, plant and equipment	132,705			(1,843		)	130,862
Permits and other intangibles	23,405			3,651			27,056
Deferred tax assets	855			(2		)	853
Current liabilities	(19,486		)	(438		)	(19,924		)
Closure and post-closure liabilities	(1,709		)	(699		)	(2,408		)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(9,518		)	(1,894		)	(11,412		)
Total identifiable net assets	158,415			(3,303		)	155,112
Goodwill	48,674			1,393			50,067
Total purchase price, net of cash acquired	$	207,089		$	(1,910	)	$	205,179

XML

DISPOSITION OF BUSINESS (Tables)

9 Months Ended

Sep. 30, 2016

Discontinued Operations and Disposal Groups [Abstract]

Disposition of Business

The following table presents (loss) income attributable to the Catalyst Services business included in the Company's consolidated results of operations for each of the periods shown and through its disposition on September 30, 2016, in thousands:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
	2016		2015	2016	2015
(Loss) income before provision for income taxes	(1,218	)	1,089	290	2,489

The following table presents the carrying amounts of the Company's Catalyst Services business immediately preceding the disposition on September 1, 2016, in thousands:

	September 1, 2016
Total current assets	$	19,135
Property, plant and equipment, net	11,126
Total other assets	6,500
Total assets divested	$	36,761
Total current liabilities	4,040
Total other liabilities	566
Total liabilities divested	$	4,606
Net carrying value divested	$	32,155

XML

INVENTORIES AND SUPPLIES (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories and supplies consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Oil and oil products	$	57,403	$	33,603
Supplies and drums	84,133		78,132
Solvent and solutions	8,502		8,868
Modular camp accommodations	15,492		15,126
Other	11,758		13,792
Total inventories and supplies	$	177,288	$	149,521

XML

PROPERTY, PLANT AND EQUIPMENT (Tables)

9 Months Ended

Sep. 30, 2016

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Land	$	122,337	$	100,582
Asset retirement costs (non-landfill)	14,590		12,434
Landfill assets	142,587		136,624
Buildings and improvements	379,435		344,209
Camp equipment	156,838		149,361
Vehicles	535,804		500,619
Equipment	1,465,378		1,328,915
Furniture and fixtures	5,546		5,337
Construction in progress	147,569		113,657
	2,970,084		2,691,738
Less - accumulated depreciation and amortization	1,321,513		1,159,271
Total property, plant and equipment, net	$	1,648,571	$	1,532,467

XML

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes to goodwill

The changes in goodwill for the nine months ended September 30, 2016 were as follows (in thousands):

	Technical Services			Industrial & Field Services			Kleen Performance Products		SK Environmental Services		Lodging Services			Oil and Gas Field Services		Totals
Balance at January 1, 2016	$	49,267		$	105,286		$	49,755	$	216,589	$	32,208		$	—	$	453,105
Acquired from current period acquisitions	8,989			4,925			18,629		17,524		—			—		50,067
Measurement period adjustment from prior period acquisitions	—			—			—		2,095		—			—		2,095
Decrease from disposition of business	—			(4,994		)	—									(4,994		)
Goodwill impairment charge											(34,013		)			(34,013		)
Foreign currency translation and other	(619		)	1,132			98		1,957		1,805			—		4,373
Balance at September 30, 2016	$	57,637		$	106,349		$	68,482	$	238,165	$	—		$	—	$	470,633

Summary of indefinite-lived intangible assets

As of September 30, 2016 and December 31, 2015, the Company's total finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):

	September 30, 2016							December 31, 2015
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	170,194	$	66,510	$	103,684	20.3	$	161,396	$	61,142	$	100,254	19.0
Customer and supplier relationships	389,002		120,922		268,080		12.5	374,866		99,463		275,403		10.1
Other intangible assets	40,266		27,548		12,718		7.8	31,416		22,581		8,835		1.5
Total amortizable permits and other intangible assets	599,462		214,980		384,482		14.4	567,678		183,186		384,492		10.0
Trademarks and trade names	122,855		—		122,855		Indefinite	122,326		—		122,326		Indefinite
Total permits and other intangible assets	$	722,317	$	214,980	$	507,337		$	690,004	$	183,186	$	506,818

Schedule of finite-Lived intangible assets

As of September 30, 2016 and December 31, 2015, the Company's total finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):

	September 30, 2016							December 31, 2015
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	170,194	$	66,510	$	103,684	20.3	$	161,396	$	61,142	$	100,254	19.0
Customer and supplier relationships	389,002		120,922		268,080		12.5	374,866		99,463		275,403		10.1
Other intangible assets	40,266		27,548		12,718		7.8	31,416		22,581		8,835		1.5
Total amortizable permits and other intangible assets	599,462		214,980		384,482		14.4	567,678		183,186		384,492		10.0
Trademarks and trade names	122,855		—		122,855		Indefinite	122,326		—		122,326		Indefinite
Total permits and other intangible assets	$	722,317	$	214,980	$	507,337		$	690,004	$	183,186	$	506,818

Schedule of expected amortization for the net carrying amount of finite lived intangible assets

The expected amortization of the net carrying amount of finite-lived intangible assets at September 30, 2016 was as follows (in thousands):

Years Ending December 31,	Expected Amortization
2016 (three months)	$	9,533
2017	35,325
2018	32,345
2019	29,612
2020	27,316
Thereafter	250,351
	$	384,482

XML

ACCRUED EXPENSES (Tables)

9 Months Ended

Sep. 30, 2016

Payables and Accruals [Abstract]

Accrued expenses

Accrued expenses consisted of the following at September 30, 2016 and December 31, 2015 (in thousands):

	September 30, 2016		December 31, 2015
Insurance	$	59,254	$	55,899
Interest	21,859		20,500
Accrued compensation and benefits	46,921		35,646
Income, real estate, sales and other taxes	60,020		37,095
Other	38,026		44,520
	$	226,080	$	193,660

XML

CLOSURE AND POST-CLOSURE LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2016

Asset Retirement Obligation Disclosure [Abstract]

Schedule of closure and post-closure liabilities

The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2016 through September 30, 2016 were as follows (in thousands):

	Landfill Retirement Liability			Non-Landfill Retirement Liability			Total
Balance at January 1, 2016	$	32,023		$	24,226		$	56,249
Liabilities assumed in acquisitions	—			2,408			2,408
Adjustments during the measurement period related to 2015 acquisitions	—			657			657
New asset retirement obligations	1,650			—			1,650
Accretion	1,996			1,748			3,744
Changes in estimates recorded to statement of operations	(597		)	(114		)	(711		)
Expenditures	(904		)	(709		)	(1,613		)
Currency translation and other	130			53			183
Balance at September 30, 2016	$	34,298		$	28,269		$	62,567

XML

REMEDIAL LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2016

Environmental Remediation Obligations [Abstract]

Changes to remedial liabilities

The changes to remedial liabilities for the nine months ended September 30, 2016 were as follows (in thousands):

	Remedial Liabilities for Landfill Sites			Remedial Liabilities for Inactive Sites			Remedial Liabilities (Including Superfund) for Non-Landfill Operations			Total
Balance at January 1, 2016	$	2,327		$	63,613		$	66,052		$	131,992
Liabilities assumed in acquisition	—			—			4			4
Accretion	82			2,049			1,654			3,785
Changes in estimates recorded to statement of operations	71			(448		)	739			362
Expenditures	(88		)	(2,957		)	(4,716		)	(7,761		)
Currency translation and other	—			45			654			699
Balance at September 30, 2016	$	2,392		$	62,302		$	64,387		$	129,081

XML

FINANCING ARRANGEMENTS (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Summary of the entity's financial arrangements

The following table is a summary of the Company’s financing arrangements (in thousands):

	September 30, 2016			December 31, 2015
Senior unsecured notes, at 5.25%, due August 1, 2020 ("2020 Notes")	$	800,000		$	800,000
Senior unsecured notes, at 5.125%, due June 1, 2021 ("2021 Notes")	845,000			595,000
Long-term obligations, at par	$	1,645,000		$	1,395,000
Unamortized debt issuance costs and premium, net	(12,423		)	(12,457		)
Long-term obligations, at carrying value	$	1,632,577		$	1,382,543

XML

(LOSS) EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share computations

The following are computations of basic and diluted (loss) earnings per share (in thousands except for per share amounts):

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Numerator for basic and diluted (loss) earnings per share:
Net (loss) income	$	(10,255	)	$	40,228	$	(27,160	)	$	43,534
Denominator:
Basic shares outstanding	57,487			58,161		57,575			58,799
Dilutive effect of equity-based compensation awards	—			107		—			99
Dilutive shares outstanding	57,487			58,268		57,575			58,898
Basic (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74
Diluted (loss) earnings per share:	$	(0.18	)	$	0.69	$	(0.47	)	$	0.74

XML

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Schedule of accumulated other comprehensive loss

The changes in accumulated other comprehensive loss by component and related tax effects for the nine months ended September 30, 2016 were as follows (in thousands):    

	Foreign Currency Translation			Unrealized Gains on Available-For-Sale Securities			Unfunded Pension Liability			Total
Balance at January 1, 2016	$	(252,939	)	$	—		$	(1,953	)	$	(254,892	)
Other comprehensive income (loss) before reclassifications	43,706			(596		)	—			43,110
Tax effects	—			238			—			238
Other comprehensive income (loss)	$	43,706		$	(358	)	$	—		$	43,348
Balance at September 30, 2016	$	(209,233	)	$	(358	)	$	(1,953	)	$	(211,544	)

XML

STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of restricted stock awards

The following table summarizes information about restricted stock awards for the nine months ended September 30, 2016:

Restricted Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	362,618		$	55.79
Granted	335,992		$	50.87
Vested	(168,565	)	$	54.06
Forfeited	(46,298	)	$	53.04
Balance at September 30, 2016	483,747		$	53.23

Summary of performance stock awards

The following table summarizes information about performance stock awards for the nine months ended September 30, 2016:

Performance Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	187,274		$	57.13
Granted	207,624		$	54.21
Vested	(8,420	)	$	61.90
Forfeited	(33,469	)	$	55.96
Balance at September 30, 2016	353,009		$	55.39

XML

SEGMENT REPORTING (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Reconciliation of third party revenues to direct revenues

The following table reconciles third party revenues to direct revenues for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	For the Three Months Ended September 30, 2016											For the Three Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues			Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	232,482	$	38,795		$	492		$	271,769		$	253,069	$	34,819		$	506		$	288,394
Industrial and Field Services	162,118		(12,734		)	(32		)	149,352			307,226		(6,973		)	(313		)	299,940
Kleen Performance Products	102,318		(9,761		)	—			92,557			100,827		(23,744		)	(6		)	77,077
SK Environmental Services	194,764		(18,955		)	1			175,810			171,832		(5,947		)	2			165,887
Lodging Services	15,520		233			19			15,772			13,507		743			30			14,280
Oil and Gas Field Services	22,197		2,422			86			24,705			46,788		1,102			92			47,982
Corporate Items	121		—			(566		)	(445		)	117		—			(311		)	(194		)
Total	$	729,520	$	—		$	—		$	729,520		$	893,366	$	—		$	—		$	893,366

	For the Nine Months Ended September 30, 2016										For the Nine Months Ended September 30, 2015
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues		Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Technical Services	$	680,717	$	109,217		$	1,547		$	791,481	$	741,419	$	108,037		$	2,886		$	852,342
Industrial and Field Services	437,546		(29,255		)	(335		)	407,956		807,423		(24,764		)	(636		)	782,023
Kleen Performance Products	256,572		(26,768		)	(1		)	229,803		296,738		(63,429		)	(8		)	233,301
SK Environmental Services	565,186		(59,561		)	369			505,994		508,392		(26,331		)	5			482,066
Lodging Services	47,583		634			54			48,271		68,782		1,899			127			70,808
Oil and Gas Field Services	73,445		5,733			221			79,399		138,992		4,588			141			143,721
Corporate Items	2,064		—			(1,855		)	209		347		—			(2,515		)	(2,168		)
Total	$	2,063,113	$	—		$	—		$	2,063,113	$	2,562,093	$	—		$	—		$	2,562,093

Reconciliation to consolidated statements of income to adjusted EBITDA

The following table presents Adjusted EBITDA information used by management by reported segment (in thousands). The Company does not allocate interest expense, income taxes, depreciation, amortization, accretion of environmental liabilities, other non-cash charges not deemed representative of fundamental segment results, and other expense (income) to its segments.    

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Adjusted EBITDA:
Technical Services	$	72,333		$	79,048		$	201,622		$	219,257
Industrial and Field Services	18,579			62,460			40,643			145,850
Kleen Performance Products	22,803			12,123			37,358			23,471
SK Environmental Services	47,250			40,096			127,984			108,540
Lodging Services	4,104			1,827			8,145			12,589
Oil and Gas Field Services	(4,425		)	1,579			(10,026		)	800
Corporate Items	(33,993		)	(31,526		)	(101,310		)	(103,501		)
Total	$	126,651		$	165,607		$	304,416		$	407,006
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	2,476			2,577			7,529			7,795
Depreciation and amortization	73,360			69,060			215,655			205,189
Goodwill impairment charge	34,013			—			34,013			31,992
Income from operations	16,802			93,970			47,219			162,030
Other expense	198			139			737			390
Gain on sale of business	(16,431		)	—			(16,431		)	—
Interest expense, net of interest income	21,565			19,017			62,192			57,704
Income before provision for income taxes	$	11,470		$	74,814		$	721		$	103,936

PP&E, intangible assets and total assets by segment

The following table presents certain assets by reportable segment and in the aggregate (in thousands):

	September 30, 2016
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	521,040	$	211,712	$	260,608	$	328,655	$	99,764	$	139,137	$	87,655	$	1,648,571
Goodwill	57,637		106,349		68,482		238,165		—		—		—		470,633
Permits and other intangibles, net	74,646		11,490		141,039		264,864		5,951		9,347		—		507,337
Total assets	$	859,794	$	366,929	$	605,160	$	920,333	$	142,948	$	229,480	$	587,969	$	3,712,613

	December 31, 2015
	Technical Services		Industrial and Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	483,425	$	237,660	$	193,855	$	264,539	$	105,208	$	156,286	$	91,494	$	1,532,467
Goodwill	49,267		105,286		49,755		216,589		32,208		—		—		453,105
Permits and other intangibles, net	73,601		14,649		140,410		256,251		7,045		14,862		—		506,818
Total assets	$	800,060	$	368,858	$	492,483	$	805,488	$	181,357	$	244,210	$	538,972	$	3,431,428

Total assets by geographical area

The following table presents total assets by geographical area (in thousands):

	September 30, 2016		December 31, 2015
United States	$	2,944,936	$	2,575,746
Canada	767,677		851,949
Other foreign	—		3,733
Total	$	3,712,613	$	3,431,428

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Tables)

9 Months Ended

Sep. 30, 2016

Guarantor and Non-Guarantor Subsidiaries Financial Information [Abstract]

Schedule of condensed consolidating balance sheet

Following is the condensed consolidating balance sheet at September 30, 2016 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	51,334	$	170,183	$	36,340	$	—		$	257,857
Intercompany receivables	190,728		300,656		34,665		(526,049		)	—
Accounts receivable, net	—		418,170		94,206		—			512,376
Other current assets	2,537		207,488		69,673		—			279,698
Property, plant and equipment, net	—		1,217,704		430,867		—			1,648,571
Investments in subsidiaries	2,813,894		488,437		—		(3,302,331		)	—
Intercompany debt receivable	—		212,171		3,701		(215,872		)	—
Goodwill	—		417,992		52,641		—			470,633
Permits and other intangibles, net	—		439,543		67,794		—			507,337
Other long-term assets	1,197		9,552		25,392		—			36,141
Total assets	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613
Liabilities and Stockholders’ Equity:
Current liabilities	$	22,619	$	438,298	$	78,179	$	—		$	539,096
Intercompany payables	299,848		224,593		1,608		(526,049		)	—
Closure, post-closure and remedial liabilities, net	—		155,710		15,721		—			171,431
Long-term obligations	1,632,577		—		—		—			1,632,577
Intercompany debt payable	3,701		—		212,171		(215,872		)	—
Other long-term liabilities	—		249,401		19,163		—			268,564
Total liabilities	1,958,745		1,068,002		326,842		(741,921		)	2,611,668
Stockholders’ equity	1,100,945		2,813,894		488,437		(3,302,331		)	1,100,945
Total liabilities and stockholders’ equity	$	3,059,690	$	3,881,896	$	815,279	$	(4,044,252	)	$	3,712,613

Following is the condensed consolidating balance sheet at December 31, 2015 (in thousands):

	Clean Harbors, Inc.		U.S. Guarantor Subsidiaries		Foreign Non-Guarantor Subsidiaries		Consolidating Adjustments			Total
Assets:
Cash and cash equivalents	$	11,017	$	83,479	$	90,212	$	—		$	184,708
Intercompany receivables	164,709		213,243		39,804		(417,756		)	—
Accounts receivables, net	—		404,580		91,424		—			496,004
Other current assets	—		179,969		60,515		—			240,484
Property, plant and equipment, net	—		1,082,466		450,001		—			1,532,467
Investments in subsidiaries	2,547,307		522,067		—		(3,069,374		)	—
Intercompany debt receivable	—		260,957		3,701		(264,658		)	—
Goodwill	—		367,306		85,799		—			453,105
Permits and other intangibles, net	—		435,080		71,738		—			506,818
Other long-term assets	1,068		10,274		6,500		—			17,842
Total assets	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428
Liabilities and Stockholders’ Equity:
Current liabilities	$	20,813	$	424,588	$	71,719	$	—		$	517,120
Intercompany payables	220,762		195,287		1,707		(417,756		)	—
Closure, post-closure and remedial liabilities, net	—		153,190		14,656		—			167,846
Long-term obligations	1,382,543		—		—		—			1,382,543
Intercompany debt payable	3,701		—		260,957		(264,658		)	—
Other long-term liabilities	—		239,049		28,588		—			267,637
Total liabilities	1,627,819		1,012,114		377,627		(682,414		)	2,335,146
Stockholders’ equity	1,096,282		2,547,307		522,067		(3,069,374		)	1,096,282
Total liabilities and stockholders’ equity	$	2,724,101	$	3,559,421	$	899,694	$	(3,751,788	)	$	3,431,428

Schedule of condensed consolidating statement of income

Following is the consolidating statement of operations for the three months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	461,139		$	145,780		$	(12,694	)	$	594,225
Product revenues	—			118,106			20,072			(2,883		)	135,295
Total revenues	—			579,245			165,852			(15,577		)	729,520
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(598		)	288,764			110,070			(12,694		)	385,542
Product cost of revenues	—			94,050			15,206			(2,883		)	106,373
Total cost of revenues	(598		)	382,814			125,276			(15,577		)	491,915
Selling, general and administrative expenses	23			88,652			22,279			—			110,954
Accretion of environmental liabilities	—			2,243			233			—			2,476
Depreciation and amortization	—			51,957			21,403			—			73,360
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	575			53,579			(37,352		)	—			16,802
Other expense	—			(188		)	(10		)	—			(198		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(23,042		)	1,456			21			—			(21,565		)
Equity in earnings of subsidiaries, net of taxes	3,225			(22,341		)	—			19,116			—
Intercompany interest income (expense)	—			5,235			(5,235		)	—			—
(Loss) income before (benefit) provision for income taxes	(19,242		)	39,029			(27,433		)	19,116			11,470
(Benefit) provision for income taxes	(8,987		)	35,803			(5,091		)	—			21,725
Net (loss) income	(10,255		)	3,226			(22,342		)	19,116			(10,255		)
Other comprehensive loss	(1,311		)	(1,311		)	(3,927		)	5,238			(1,311		)
Comprehensive (loss) income	$	(11,566	)	$	1,915		$	(26,269	)	$	24,354		$	(11,566	)

Following is the consolidating statement of operations for the three months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	612,814		$	162,680		$	(14,827	)	$	760,667
Product revenues	—			117,653			17,591			(2,545		)	132,699
Total revenues	—			730,467			180,271			(17,372		)	893,366
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			413,878			124,625			(14,827		)	523,676
Product cost of revenues	—			101,778			11,737			(2,545		)	110,970
Total cost of revenues	—			515,656			136,362			(17,372		)	634,646
Selling, general and administrative expenses	25			72,811			20,277			—			93,113
Accretion of environmental liabilities	—			2,277			300			—			2,577
Depreciation and amortization	—			46,951			22,109			—			69,060
(Loss) income from operations	(25		)	92,772			1,223			—			93,970
Other income (expense)	—			204			(343		)	—			(139		)
Interest (expense) income	(19,671		)	613			41			—			(19,017		)
Equity in earnings of subsidiaries, net of taxes	52,046			(2,341		)	—			(49,705		)	—
Intercompany interest income (expense)	—			5,666			(5,666		)	—			—
Income (loss) before (benefit) provision for income taxes	32,350			96,914			(4,745		)	(49,705		)	74,814
(Benefit) provision for income taxes	(7,878		)	44,868			(2,404		)	—			34,586
Net income (loss)	40,228			52,046			(2,341		)	(49,705		)	40,228
Other comprehensive loss	(53,541		)	(53,541		)	(34,150		)	87,691			(53,541		)
Comprehensive loss	$	(13,313	)	$	(1,495	)	$	(36,491	)	$	37,986		$	(13,313	)

Following is the consolidating statement of operations for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,345,629		$	399,216		$	(35,827	)	$	1,709,018
Product revenues	—			303,342			58,176			(7,423		)	354,095
Total revenues	—			1,648,971			457,392			(43,250		)	2,063,113
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(1,185		)	864,071			321,153			(35,827		)	1,148,212
Product cost of revenues	—			252,512			42,895			(7,423		)	287,984
Total cost of revenues	(1,185		)	1,116,583			364,048			(43,250		)	1,436,196
Selling, general and administrative expenses	84			253,189			69,228			—			322,501
Accretion of environmental liabilities	—			6,846			683			—			7,529
Depreciation and amortization	—			151,348			64,307			—			215,655
Goodwill impairment charge	—			—			34,013			—			34,013
Income (loss) from operations	1,101			121,005			(74,887		)	—			47,219
Other income (expense)	—			124			(861		)	—			(737		)
Gain on sale of business	—			1,288			15,143			—			16,431
Interest (expense) income	(66,147		)	3,851			104			—			(62,192		)
Equity in earnings of subsidiaries, net of taxes	11,867			(58,031		)	—			46,164			—
Intercompany interest income (expense)	—			15,891			(15,891		)	—			—
(Loss) income before (benefit) provision for income taxes	(53,179		)	84,128			(76,392		)	46,164			721
(Benefit) provision for income taxes	(26,019		)	72,260			(18,360		)	—			27,881
Net (loss) income	(27,160		)	11,868			(58,032		)	46,164			(27,160		)
Other comprehensive gain	43,348			43,348			24,403			(67,751		)	43,348
Comprehensive gain (loss)	$	16,188		$	55,216		$	(33,629	)	$	(21,587	)	$	16,188

Following is the consolidating statement of operations for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Revenues
Service revenues	$	—		$	1,659,739		$	546,790		$	(48,185	)	$	2,158,344
Product revenues	—			349,524			63,239			(9,014		)	403,749
Total revenues	—			2,009,263			610,029			(57,199		)	2,562,093
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	—			1,106,591			426,530			(48,185		)	1,484,936
Product cost of revenues	—			315,322			42,597			(9,014		)	348,905
Total cost of revenues	—			1,421,913			469,127			(57,199		)	1,833,841
Selling, general and administrative expenses	75			247,472			73,699			—			321,246
Accretion of environmental liabilities	—			6,870			925			—			7,795
Depreciation and amortization	—			137,354			67,835			—			205,189
Goodwill impairment charge	—			4,164			27,828			—			31,992
(Loss) income from operations	(75		)	191,490			(29,385		)	—			162,030
Other income (expense)	—			483			(873		)	—			(390		)
Interest (expense) income	(58,962		)	1,115			143			—			(57,704		)
Equity in earnings of subsidiaries, net of taxes	78,956			(38,920		)	—			(40,036		)	—
Intercompany interest income (expense)	—			17,679			(17,679		)	—			—
Income (loss) before (benefit) provision for income taxes	19,919			171,847			(47,794		)	(40,036		)	103,936
(Benefit) provision for income taxes	(23,615		)	92,891			(8,874		)	—			60,402
Net income (loss)	43,534			78,956			(38,920		)	(40,036		)	43,534
Other comprehensive loss	(118,713		)	(118,713		)	(76,752		)	195,465			(118,713		)
Comprehensive loss	$	(75,179	)	$	(39,757	)	$	(115,672	)	$	155,429		$	(75,179	)

Schedule of condensed consolidating statement of cash flows

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2016 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from (used in) operating activities	$	43,033		$	128,182		$	7,612		$	—		$	178,827
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(152,836		)	(22,512		)	—			(175,348		)
Proceeds from sales of fixed assets	—			950			3,032			—			3,982
Acquisitions, net of cash acquired	—			(197,089		)	(10,000		)	—			(207,089		)
Proceeds on sale of business	—			18,885			28,249			—			47,134
Costs to obtain or renew permits	—			(949		)	(971		)	—			(1,920		)
Purchase of available-for-sale securities	(102		)	—			(496		)	—			(598		)
Investment in subsidiaries	(250,625		)	—			—			250,625			—
Intercompany	—			(18,118		)	—			18,118			—
Net cash used in investing activities	(250,727		)	(349,157		)	(2,698		)	268,743			(333,839		)
Cash flows from (used in) financing activities:
Change in uncashed checks	—			(6,064		)	(1,020		)	—			(7,084		)
Exercise of stock options	230			—			—			—			230
Issuance of restricted shares, net of shares remitted	(2,500		)	—			—			—			(2,500		)
Repurchases of common stock	(15,869		)	—			—			—			(15,869		)
Excess tax benefit of stock-based compensation	21			—			—			—			21
Deferred financing costs paid	(2,614		)	—			—			—			(2,614		)
Issuance of senior secured notes, including premium	250,625			250,625			—			(250,625		)	250,625
Intercompany	18,118			—			—			(18,118		)	—
Intercompany debt	—			63,118			(63,118		)	—			—
Net cash from (used in) financing activities	248,011			307,679			(64,138		)	(268,743		)	222,809
Effect of exchange rate change on cash	—			—			5,352			—			5,352
Increase (decrease) in cash and cash equivalents	40,317			86,704			(53,872		)	—			73,149
Cash and cash equivalents, beginning of period	11,017			83,479			90,212			—			184,708
Cash and cash equivalents, end of period	$	51,334		$	170,183		$	36,340		$	—		$	257,857

Following is the condensed consolidating statement of cash flows for the nine months ended September 30, 2015 (in thousands):

	Clean Harbors, Inc.			U.S. Guarantor Subsidiaries			Foreign Non-Guarantor Subsidiaries			Consolidating Adjustments			Total
Net cash from operating activities	$	9,503		$	240,713		$	59,377		$	—		$	309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	—			(162,329		)	(27,670		)	—			(189,999		)
Proceeds from sale of fixed assets	—			1,177			2,563			—			3,740
Acquisitions, net of cash acquired	—			(79,610		)	—			—			(79,610		)
Costs to obtain or renew permits	—			(4		)	(4,629		)	—			(4,633		)
Intercompany	—			(71,182		)	—			71,182			—
Net cash used in investing activities	—			(311,948		)	(29,736		)	71,182			(270,502		)
Cash flows used in financing activities:
Change in uncashed checks	—			(16,635		)	(5,247		)	—			(21,882		)
Proceeds from exercise of stock options	397			—			—			—			397
Issuance of restricted shares, net of shares remitted	(2,027		)	—			—			—			(2,027		)
Repurchases of common stock	(69,155		)	—			—			—			(69,155		)
Excess tax benefit of stock-based compensation	102			—			—			—			102
Payments of capital leases	—			(203		)	(297		)	—			(500		)
Intercompany	71,182			—			—			(71,182		)	—
Net cash from (used in) financing activities	499			(16,838		)	(5,544		)	(71,182		)	(93,065		)
Effect of exchange rate change on cash	—			—			(13,714		)	—			(13,714		)
Increase (decrease) in cash and cash equivalents	10,002			(88,073		)	10,383			—			(67,688		)
Cash and cash equivalents, beginning of period	1,006			154,147			91,726			—			246,879
Cash and cash equivalents, end of period	$	11,008		$	66,074		$	102,109		$	—		$	179,191

XML

BUSINESS COMBINATIONS (Narrative) (Details) $ in Thousands		1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 11, 2015 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($) aquisition rerefinery
Business Acquisition [Line Items]
Goodwill, acquired during period				$ 50,067
2016 Acquisitions
Business Acquisition [Line Items]
Number of acquisitions | aquisition				7
Number of re-refineries acquired | rerefinery				2
Purchase price				$ 205,200
Revenue from acquisitions			$ 26,000	38,100
Acquisition-related costs			$ 700	$ 1,200
Thermo Fluids Inc.
Business Acquisition [Line Items]
Purchase price	$ 79,300
Privately Owned Domestic Company
Business Acquisition [Line Items]
Purchase price		$ 14,700
Goodwill, acquired during period		$ 7,400

XML

BUSINESS COMBINATIONS (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	9 Months Ended	18 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015	Apr. 11, 2015
Business Acquisition [Line Items]
Goodwill	$ 470,633	$ 470,633	$ 453,105
2016 Acquisitions
Business Acquisition [Line Items]
Accounts receivable	16,368	16,368
Measurement period adjustments, accounts receivable	(1,016)
Inventories and supplies	12,788	12,788
Measurement period adjustment, inventories and supplies	(1,071)
Prepaid and other current assets	929	929
Measurement period adjustment, prepaid and other current assets	9
Property, plant and equipment	130,862	130,862
Measurement period adjustments, property, plant and equipment	(1,843)
Permits and other intangibles	27,056	27,056
Measurement period adjustments, permits and other intangibles	3,651
Deferred tax assets	853	853
Measurement period adjustments, deferred tax assets	(2)
Current liabilities	(19,924)	(19,924)
Measurement period adjustments, current liabilities	(438)
Closure and post-closure liabilities	(2,408)	(2,408)
Measurement period adjustments, closure and post-closure liabilities	(699)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(11,412)	(11,412)
Measurement period adjustments, deferred taxes, unrecognized tax benefits and other long-term liabilities	(1,894)
Total identifiable net assets	155,112	155,112
Measurement period adjustments, total identifiable net assets	(3,303)
Goodwill	50,067	50,067
Measurement period adjustments, goodwill	1,393
Total purchase price, net of cash acquired	205,179	205,179
Measurement period adjustments, total purchase price, net of cash acquired	(1,910)
Thermo Fluids Inc.
Business Acquisition [Line Items]
Accounts receivable	7,301	7,301
Measurement period adjustments, accounts receivable		192
Inventories and supplies	1,791	1,791
Measurement period adjustment, inventories and supplies		0
Prepaid and other current assets	665	665
Measurement period adjustment, prepaid and other current assets		(1,084)
Property, plant and equipment	27,641	27,641
Measurement period adjustments, property, plant and equipment		(2,827)
Permits and other intangibles	18,100	18,100
Measurement period adjustments, permits and other intangibles		(1,900)
Current liabilities	(5,884)	(5,884)
Measurement period adjustments, current liabilities		(25)
Closure and post-closure liabilities	(2,333)	(2,333)
Measurement period adjustments, closure and post-closure liabilities		(657)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(9,174)	(9,174)
Measurement period adjustments, deferred taxes, unrecognized tax benefits and other long-term liabilities		3,907
Total identifiable net assets	38,107	38,107
Measurement period adjustments, total identifiable net assets		(2,394)
Goodwill	41,229	41,229
Measurement period adjustments, goodwill		4,638
Total purchase price, net of cash acquired	79,336	79,336
Measurement period adjustments, total purchase price, net of cash acquired		2,244
At Acquisition Dates | 2016 Acquisitions
Business Acquisition [Line Items]
Accounts receivable	17,384	17,384
Inventories and supplies	13,859	13,859
Prepaid and other current assets	920	920
Property, plant and equipment	132,705	132,705
Permits and other intangibles	23,405	23,405
Deferred tax assets	855	855
Current liabilities	(19,486)	(19,486)
Closure and post-closure liabilities	(1,709)	(1,709)
Deferred taxes, unrecognized tax benefits and other long-term liabilities	(9,518)	(9,518)
Total identifiable net assets	158,415	158,415
Goodwill	48,674	48,674
Total purchase price, net of cash acquired	$ 207,089	$ 207,089
At Acquisition Dates | Thermo Fluids Inc.
Business Acquisition [Line Items]
Accounts receivable				$ 7,109
Inventories and supplies				1,791
Prepaid and other current assets				1,749
Property, plant and equipment				30,468
Permits and other intangibles				20,000
Current liabilities				(5,859)
Closure and post-closure liabilities				(1,676)
Deferred taxes, unrecognized tax benefits and other long-term liabilities				(13,081)
Total identifiable net assets				40,501
Goodwill				36,591
Total purchase price, net of cash acquired				$ 77,092

XML

DISPOSITION OF BUSINESS (Narrative) (Details) - Catalyst Services - Disposal Group, Disposed of by Sale, Not Discontinued Operations - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Sep. 01, 2016	Sep. 30, 2016	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale	$ 50.1
Proceeds from sale, net of cash divested	48.6
Gain on sale		$ 16.4	$ 16.4
Transaction costs	$ 1.5	$ 1.5	$ 1.5

XML

DISPOSITION OF BUSINESS (Carrying Amount of Catalyst) (Details) - Catalyst Services - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Thousands	Sep. 01, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	$ 19,135
Property, plant and equipment, net	11,126
Total other assets	6,500
Total assets divested	36,761
Total current liabilities	4,040
Total other liabilities	566
Total liabilities divested	4,606
Net carrying value divested	$ 32,155

XML

DISPOSITION OF BUSINESS (Income (Loss) Attributable to Catalyst Services) (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 01, 2016	Sep. 30, 2015	Sep. 01, 2016	Sep. 30, 2015
Catalyst Services | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income before provision for income taxes	$ (1,218)	$ 1,089	$ 290	$ 2,489

XML

INVENTORIES AND SUPPLIES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Oil and oil products	$ 57,403	$ 33,603
Supplies and drums	84,133	78,132
Solvent and solutions	8,502	8,868
Modular camp accommodations	15,492	15,126
Other	11,758	13,792
Total inventories and supplies	$ 177,288	$ 149,521

XML

PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 2,970,084		$ 2,970,084		$ 2,691,738
Less - accumulated depreciation and amortization	1,321,513		1,321,513		1,159,271
Total property, plant and equipment, net	1,648,571		1,648,571		1,532,467
Interest costs capitalized adjustment	1,500	$ 600	4,000	$ 1,200
Depreciation inclusive of amortization	62,600	$ 59,200	185,400	$ 175,500
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	122,337		122,337		100,582
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	14,590		14,590		12,434
Landfill assets
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	142,587		142,587		136,624
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	379,435		379,435		344,209
Camp equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	156,838		156,838		149,361
Vehicles
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	535,804		535,804		500,619
Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	1,465,378		1,465,378		1,328,915
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	5,546		5,546		5,337
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 147,569		$ 147,569		$ 113,657

XML

GOODWILL AND OTHER INTANGIBLE ASSETS (Rollforward of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill [Roll Forward]
Balance at beginning of year			$ 453,105
Acquired from current period acquisitions			50,067
Measurement period adjustment from prior period acquisitions			2,095
Decrease from disposition of business			(4,994)
Goodwill impairment charge	$ (34,013)	$ 0	(34,013)	$ (31,992)
Foreign currency translation and other			4,373
Balance at end of year	470,633		470,633
Technical Services
Goodwill [Roll Forward]
Balance at beginning of year			49,267
Balance at end of year	57,637		57,637
Industrial and Field Services
Goodwill [Roll Forward]
Balance at beginning of year			105,286
Balance at end of year	106,349		106,349
Kleen Performance Products
Goodwill [Roll Forward]
Balance at beginning of year			49,755
Balance at end of year	68,482		68,482
SK Environmental Services
Goodwill [Roll Forward]
Balance at beginning of year			216,589
Balance at end of year	238,165		238,165
Lodging Services
Goodwill [Roll Forward]
Balance at beginning of year			32,208
Goodwill impairment charge	(34,000)
Balance at end of year	0		0
Oil and Gas Field Services
Goodwill [Roll Forward]
Balance at beginning of year			0
Balance at end of year	0		0
Operating Segments | Technical Services
Goodwill [Roll Forward]
Balance at beginning of year			49,267
Acquired from current period acquisitions			8,989
Measurement period adjustment from prior period acquisitions			0
Decrease from disposition of business			0
Goodwill impairment charge
Foreign currency translation and other			(619)
Balance at end of year	57,637		57,637
Operating Segments | Industrial and Field Services
Goodwill [Roll Forward]
Balance at beginning of year			105,286
Acquired from current period acquisitions			4,925
Measurement period adjustment from prior period acquisitions			0
Decrease from disposition of business			(4,994)
Goodwill impairment charge
Foreign currency translation and other			1,132
Balance at end of year	106,349		106,349
Operating Segments | Kleen Performance Products
Goodwill [Roll Forward]
Balance at beginning of year			49,755
Acquired from current period acquisitions			18,629
Measurement period adjustment from prior period acquisitions			0
Decrease from disposition of business			0
Goodwill impairment charge
Foreign currency translation and other			98
Balance at end of year	68,482		68,482
Operating Segments | SK Environmental Services
Goodwill [Roll Forward]
Balance at beginning of year			216,589
Acquired from current period acquisitions			17,524
Measurement period adjustment from prior period acquisitions			2,095
Decrease from disposition of business
Goodwill impairment charge
Foreign currency translation and other			1,957
Balance at end of year	238,165		238,165
Operating Segments | Lodging Services
Goodwill [Roll Forward]
Balance at beginning of year			32,208
Acquired from current period acquisitions			0
Measurement period adjustment from prior period acquisitions			0
Decrease from disposition of business
Goodwill impairment charge			(34,013)
Foreign currency translation and other			1,805
Balance at end of year	0		0
Operating Segments | Oil and Gas Field Services
Goodwill [Roll Forward]
Balance at beginning of year			0
Acquired from current period acquisitions			0
Measurement period adjustment from prior period acquisitions			0
Decrease from disposition of business
Goodwill impairment charge
Foreign currency translation and other			0
Balance at end of year	$ 0		$ 0

XML

GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Goodwill impairment charge	$ 34,013	$ 0	$ 34,013	$ 31,992
Goodwill	470,633		470,633		$ 453,105
Property, plant and equipment, net	1,648,571		1,648,571		1,532,467
Intangible assets	507,337		507,337		506,818
Amortization of permits and other intangible assets	10,800	$ 9,900	30,300	$ 29,700
Lodging Services
Segment Reporting Information [Line Items]
Goodwill	34,000		34,000
Fair value of goodwill	0		0
Goodwill impairment charge	34,000
Goodwill	0		0		32,208
Property, plant and equipment, net	99,764		99,764		105,208
Intangible assets	5,951		5,951		7,045
Industrial and Field Services
Segment Reporting Information [Line Items]
Goodwill	106,349		106,349		105,286
Property, plant and equipment, net	211,712		211,712		237,660
Intangible assets	11,490		11,490		$ 14,649
Industrial and Field Services | Industrial Services
Segment Reporting Information [Line Items]
Goodwill	$ 25,100		$ 25,100

XML

GOODWILL AND OTHER INTANGIBLE ASSETS (Amortizable Other Intangible Assets) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 599,462	$ 567,678
Accumulated Amortization	214,980	183,186
Net	$ 384,482	$ 384,492
Weighted Average Remaining Amortization Period (in years)	14 years 5 months	10 years
Total permits and other intangible assets, Cost	$ 722,317	$ 690,004
Total permits and other intangible assets, Net	507,337	506,818
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Trademarks and trade names	122,855	122,326
Permits
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	170,194	161,396
Accumulated Amortization	66,510	61,142
Net	$ 103,684	$ 100,254
Weighted Average Remaining Amortization Period (in years)	20 years 3 months	19 years
Customer and supplier relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 389,002	$ 374,866
Accumulated Amortization	120,922	99,463
Net	$ 268,080	$ 275,403
Weighted Average Remaining Amortization Period (in years)	12 years 6 months	10 years 30 days
Other intangible assets
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Cost	$ 40,266	$ 31,416
Accumulated Amortization	27,548	22,581
Net	$ 12,718	$ 8,835
Weighted Average Remaining Amortization Period (in years)	7 years 9 months 3 days	1 year 6 months

XML

GOODWILL AND OTHER INTANGIBLE ASSETS (Expected Future Amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2016 (three months)	$ 9,533
2017	35,325
2018	32,345
2019	29,612
2020	27,316
Thereafter	250,351
Net	$ 384,482	$ 384,492

XML

ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Insurance	$ 59,254	$ 55,899
Interest	21,859	20,500
Accrued compensation and benefits	46,921	35,646
Income, real estate, sales and other taxes	60,020	37,095
Other	38,026	44,520
Total accrued expenses	$ 226,080	$ 193,660

XML

CLOSURE AND POST-CLOSURE LIABILITIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Changes to post-closure liabilities
Beginning balance	$ 56,249
Liabilities assumed in acquisitions	2,408
Adjustments during the measurement period related to 2015 acquisitions	657
New asset retirement obligations	1,650
Accretion	3,744
Changes in estimates recorded to statement of operations	(711)
Expenditures	(1,613)
Currency translation and other	183
Ending balance	$ 62,567
Credit-adjusted risk-free rate	6.23%
Landfill Retirement Liability
Changes to post-closure liabilities
Beginning balance	$ 32,023
Liabilities assumed in acquisitions	0
Adjustments during the measurement period related to 2015 acquisitions	0
New asset retirement obligations	1,650
Accretion	1,996
Changes in estimates recorded to statement of operations	(597)
Expenditures	(904)
Currency translation and other	130
Ending balance	34,298
Non-Landfill Retirement Liability
Changes to post-closure liabilities
Beginning balance	24,226
Liabilities assumed in acquisitions	2,408
Adjustments during the measurement period related to 2015 acquisitions	657
New asset retirement obligations	0
Accretion	1,748
Changes in estimates recorded to statement of operations	(114)
Expenditures	(709)
Currency translation and other	53
Ending balance	$ 28,269

XML

REMEDIAL LIABILITIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 131,992
Liabilities assumed in acquisition	4
Accretion	3,785
Changes in estimates recorded to statement of operations	362
Expenditures	(7,761)
Currency translation and other	699
Balance at end of year	129,081
Remedial Liabilities for Landfill Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	2,327
Liabilities assumed in acquisition	0
Accretion	82
Changes in estimates recorded to statement of operations	71
Expenditures	(88)
Currency translation and other	0
Balance at end of year	2,392
Remedial Liabilities for Inactive Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	63,613
Liabilities assumed in acquisition	0
Accretion	2,049
Changes in estimates recorded to statement of operations	(448)
Expenditures	(2,957)
Currency translation and other	45
Balance at end of year	62,302
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	66,052
Liabilities assumed in acquisition	4
Accretion	1,654
Changes in estimates recorded to statement of operations	739
Expenditures	(4,716)
Currency translation and other	654
Balance at end of year	$ 64,387

XML

FINANCING ARRANGEMENTS (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Mar. 14, 2016	Dec. 31, 2015	Dec. 07, 2012
Financing arrangements
Long-term obligations, at par	$ 1,645,000,000		$ 1,395,000,000
Unamortized debt issuance costs and premium, net	(12,423,000)		(12,457,000)
Long-term obligations, at carrying value	1,632,577,000		1,382,543,000
Revolving credit facility, amount outstanding	0		0
Line of credit facility available borrowing capacity	201,400,000		178,500,000
Letters of credit amount outstanding	$ 142,000,000		144,600,000
Parent and domestic subsidiaries
Financing arrangements
Credit available subject to percentage of accounts receivable	85.00%
Credit available subject to percentage of cash deposited	100.00%
Canadian subsidiaries
Financing arrangements
Credit available subject to percentage of accounts receivable	85.00%
Credit available subject to percentage of cash deposited	100.00%
Unsecured debt | Senior unsecured notes, at 5.25%, due August 1, 2020 (2020 Notes)
Financing arrangements
Long-term obligations, at par	$ 800,000,000		$ 800,000,000
Stated interest rate	5.25%		5.25%
Fair value	$ 824,000,000		$ 812,000,000
Unsecured debt | Senior unsecured notes, at 5.125%, due June 1, 2021 (2021 Notes)
Financing arrangements
Long-term obligations, at par	$ 845,000,000		$ 595,000,000
Stated interest rate	5.125%		5.125%
Fair value	$ 866,100,000		$ 599,500,000
Issuance of debt	$ 250,000,000.0	$ 250,000,000.0		$ 600,000,000.0

XML

(LOSS) EARNINGS PER SHARE (Computation of Basic and Diluted Earnings Per Share)(Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator for basic and diluted (loss) earnings per share:
Net (loss) income	$ (10,255)	$ 40,228	$ (27,160)	$ 43,534
Denominator:
Basic shares outstanding (in shares)	57,487	58,161	57,575	58,799
Dilutive effect of equity-based compensation awards (in shares)	0	107	0	99
Dilutive shares outstanding (in shares)	57,487	58,268	57,575	58,898
Basic earnings (loss) per share (in USD per share)	$ (0.18)	$ 0.69	$ (0.47)	$ 0.74
Diluted earnings (loss) per share (in USD per share)	$ (0.18)	$ 0.69	$ (0.47)	$ 0.74

XML

(LOSS) EARNINGS PER SHARE (Narrative) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Performance stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from computation of earning per share (in shares)		274,257		274,257
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from computation of earning per share (in shares)		10,704		42,642
Stock Options, Restricted Stock Awards, and Performance Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from computation of earning per share (in shares)	835,482		835,482

XML

ACCUMULATED OTHER COMPREHENSIVE LOSS (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period			$ 1,096,282
Other comprehensive income (loss) before reclassifications			43,110
Tax effects			(238)
Other comprehensive income	$ (1,311)	$ (53,541)	43,348	$ (118,713)
Balance at end of period	1,100,945		1,100,945
Foreign Currency Translation
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period			(252,939)
Other comprehensive income (loss) before reclassifications			43,706
Tax effects			0
Other comprehensive income			43,706
Balance at end of period	(209,233)		(209,233)
Unrealized Gains on Available-For-Sale Securities
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period			0
Other comprehensive income (loss) before reclassifications			(596)
Tax effects			(238)
Other comprehensive income			(358)
Balance at end of period	(358)		(358)
Unfunded Pension Liability
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period			(1,953)
Other comprehensive income (loss) before reclassifications			0
Tax effects			0
Other comprehensive income			0
Balance at end of period	(1,953)		(1,953)
Total
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period			(254,892)
Other comprehensive income			43,348
Balance at end of period	$ (211,544)		$ (211,544)

XML

ACCUMULATED OTHER COMPREHENSIVE LOSS (Amount Reclassified Out of Accumulated Other Comprehensive Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Equity [Abstract]
Reclassifications out of accumulated other comprehensive income	$ 0	$ 0	$ 0	$ 0

XML

STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended		19 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Mar. 13, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 3,000,000	$ 500,000	$ 7,700,000	$ 6,600,000
Income tax benefit	$ 900,000	$ 100,000	$ 2,300,000	$ 1,800,000
Share repurchase program authorized						$ 300,000,000
Repurchases of common stock (in shares)	0.1	0.8	0.3	1.3	3.7
Repurchases of common stock	$ 6,200,000	$ 37,600,000	$ 16,348,000	$ 69,800,000	$ 194,000,000
Stock repurchase program, remaining authorized repurchase amount	106,000,000		106,000,000		106,000,000
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	17,200,000		$ 17,200,000		17,200,000
Period for recognition			3 years
Fair value restricted stock	1,800,000	600,000	$ 7,900,000	6,800,000
Performance stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	200,000		200,000		$ 200,000
Fair value restricted stock	0	$ 0	$ 400,000	$ 300,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restriction period			5 years
Reversal of previous expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ (1,400,000)

XML

STOCK-BASED COMPENSATION (Restricted Stock) (Details) - Restricted stock awards	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	362,618
Granted (in shares) | shares	335,992
Vested (in shares) | shares	(168,565)
Forfeited (in shares) | shares	(46,298)
Ending balance (in shares) | shares	483,747
Weighted Average Grant-Date Fair Value
Beginning of period (in USD per share) | $ / shares	$ 55.79
Granted (in USD per share) | $ / shares	50.87
Vested (in USD per share) | $ / shares	54.06
Forfeited (in USD per share) | $ / shares	53.04
End of period (in USD per share) | $ / shares	$ 53.23

XML

STOCK-BASED COMPENSATION (Performance Stock Awards (Details) - Performance stock awards	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	187,274
Granted (in shares) | shares	207,624
Vested (in shares) | shares	(8,420)
Forfeited (in shares) | shares	(33,469)
Ending balance (in shares) | shares	353,009
Weighted Average Grant-Date Fair Value
Beginning of period (in USD per share) | $ / shares	$ 57.13
Granted (in USD per share) | $ / shares	54.21
Vested (in USD per share) | $ / shares	61.90
Forfeited (in USD per share) | $ / shares	55.96
End of period (in USD per share) | $ / shares	$ 55.39

XML

COMMITMENTS AND CONTINGENCIES (Details) CAD in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) site facility proceeding claim	Dec. 31, 2012 CAD	Dec. 31, 1999 municipality	Dec. 31, 1968 permit	Dec. 31, 2015 USD ($) proceeding
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 20,900,000				$ 21,900,000
Number of pending personal injury claims allegedly resulting from the use of Safety-Kleen's products | proceeding	62
Number of product liability claims settled or dismissed | claim	18
Legal and Administrative Proceedings
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 18,300,000				18,900,000
Possible increase in legal and administrative proceedings | $	$ 1,800,000				1,900,000
Ville Mercier
Contingencies [Line Items]
Number of permits issued by government, for dumping organic liquid | permit				2
Number of neighboring municipalities filing separate legal proceedings against the Mercier Subsidiary and the Government of Quebec | municipality			3
General damages sought | CAD		CAD 2.9
Punitive damages sought | CAD		CAD 10.0
Superfund Proceedings
Contingencies [Line Items]
Number of sites owned by third party excluded from cleanup or related liabilities	129
Number of sites owned by the entity subject to proceedings under federal or state superfund laws | facility	3
Notices received from owners of third party sites seeking indemnification from the company	126
Number of sites for which environmental remediation expense is settled	32
Third party sites requiring expenditure on remediation	17
Number of sites not currently requiring expenditures on remediation	77
Number of sites which potential liability could exceed $100,000	11
Notices received from owners of third party sites seeking indemnification from the company	17
Superfund Proceedings | Minimum
Contingencies [Line Items]
Minimum potential liability | $	$ 100,000
ChemWaste
Contingencies [Line Items]
Indemnification agreement with third party sites	11
Kleen Performance Products
Contingencies [Line Items]
Notices received from owners of third party sites seeking indemnification from the company	6
Federal and State Enforcement Actions
Contingencies [Line Items]
Recorded reserves for actual or probable liabilities | $	$ 2,600,000				$ 3,000,000
Number of pending personal injury claims allegedly resulting from the use of Safety-Kleen's products | proceeding	5				6
Federal and State Enforcement Actions | Minimum
Contingencies [Line Items]
Minimum potential liability | $	$ 100,000				$ 100,000

XML

INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	47.80%	46.20%	80.30%	44.40%
Unrecognized tax benefits	$ 1.8		$ 1.8		$ 2.1
Interest on unrecognized tax benefits	$ 0.3		$ 0.3		$ 0.4

XML

SEGMENT REPORTING (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016 segment
Segment Reporting [Abstract]
Number of reportable segments	6

XML

SEGMENT REPORTING (Third Party Revenues to Direct Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Total revenues	$ 729,520	$ 893,366	$ 2,063,113	$ 2,562,093
Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Direct revenues
Segment Reporting Information [Line Items]
Total revenues	729,520	893,366	2,063,113	2,562,093
Technical Services
Segment Reporting Information [Line Items]
Total revenues	232,482	253,069	680,717	741,419
Technical Services | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	38,795	34,819	109,217	108,037
Technical Services | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	492	506	1,547	2,886
Technical Services | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	271,769	288,394	791,481	852,342
Industrial and Field Services
Segment Reporting Information [Line Items]
Total revenues	162,118	307,226	437,546	807,423
Industrial and Field Services | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	(12,734)	(6,973)	(29,255)	(24,764)
Industrial and Field Services | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	(32)	(313)	(335)	(636)
Industrial and Field Services | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	149,352	299,940	407,956	782,023
Kleen Performance Products
Segment Reporting Information [Line Items]
Total revenues	102,318	100,827	256,572	296,738
Kleen Performance Products | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	(9,761)	(23,744)	(26,768)	(63,429)
Kleen Performance Products | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	0	(6)	(1)	(8)
Kleen Performance Products | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	92,557	77,077	229,803	233,301
SK Environmental Services
Segment Reporting Information [Line Items]
Total revenues	194,764	171,832	565,186	508,392
SK Environmental Services | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	(18,955)	(5,947)	(59,561)	(26,331)
SK Environmental Services | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	1	2	369	5
SK Environmental Services | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	175,810	165,887	505,994	482,066
Lodging Services
Segment Reporting Information [Line Items]
Total revenues	15,520	13,507	47,583	68,782
Lodging Services | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	233	743	634	1,899
Lodging Services | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	19	30	54	127
Lodging Services | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	15,772	14,280	48,271	70,808
Oil and Gas Field Services
Segment Reporting Information [Line Items]
Total revenues	22,197	46,788	73,445	138,992
Oil and Gas Field Services | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	2,422	1,102	5,733	4,588
Oil and Gas Field Services | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	86	92	221	141
Oil and Gas Field Services | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	24,705	47,982	79,399	143,721
Corporate Items
Segment Reporting Information [Line Items]
Total revenues	121	117	2,064	347
Corporate Items | Intersegment revenues, net
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Corporate Items | Corporate Items, net
Segment Reporting Information [Line Items]
Total revenues	(566)	(311)	(1,855)	(2,515)
Corporate Items | Direct revenues
Segment Reporting Information [Line Items]
Total revenues	$ (445)	$ (194)	$ 209	$ (2,168)

XML

SEGMENT REPORTING (Adjusted EBITDA Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 126,651	$ 165,607	$ 304,416	$ 407,006
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	2,476	2,577	7,529	7,795
Depreciation and amortization	73,360	69,060	215,655	205,189
Goodwill impairment charge	34,013	0	34,013	31,992
Income (loss) from operations	16,802	93,970	47,219	162,030
Other expense	198	139	737	390
Gain on sale of business	(16,431)	0	(16,431)	0
Interest expense, net of interest income	21,565	19,017	62,192	57,704
(Loss) income before (benefit) provision for income taxes	11,470	74,814	721	103,936
Technical Services
Segment Reporting Information [Line Items]
Adjusted EBITDA	72,333	79,048	201,622	219,257
Industrial and Field Services
Segment Reporting Information [Line Items]
Adjusted EBITDA	18,579	62,460	40,643	145,850
Kleen Performance Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	22,803	12,123	37,358	23,471
SK Environmental Services
Segment Reporting Information [Line Items]
Adjusted EBITDA	47,250	40,096	127,984	108,540
Lodging Services
Segment Reporting Information [Line Items]
Adjusted EBITDA	4,104	1,827	8,145	12,589
Reconciliation to Consolidated Statements of Operations:
Goodwill impairment charge	34,000
Oil and Gas Field Services
Segment Reporting Information [Line Items]
Adjusted EBITDA	(4,425)	1,579	(10,026)	800
Corporate Items
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ (33,993)	$ (31,526)	$ (101,310)	$ (103,501)

XML

SEGMENT REPORTING (Assets by Reportable Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 1,648,571	$ 1,532,467
Goodwill	470,633	453,105
Permits and other intangibles, net	507,337	506,818
Total assets	3,712,613	3,431,428
Technical Services
Segment Reporting Information [Line Items]
Property, plant and equipment, net	521,040	483,425
Goodwill	57,637	49,267
Permits and other intangibles, net	74,646	73,601
Total assets	859,794	800,060
Industrial and Field Services
Segment Reporting Information [Line Items]
Property, plant and equipment, net	211,712	237,660
Goodwill	106,349	105,286
Permits and other intangibles, net	11,490	14,649
Total assets	366,929	368,858
Kleen Performance Products
Segment Reporting Information [Line Items]
Property, plant and equipment, net	260,608	193,855
Goodwill	68,482	49,755
Permits and other intangibles, net	141,039	140,410
Total assets	605,160	492,483
SK Environmental Services
Segment Reporting Information [Line Items]
Property, plant and equipment, net	328,655	264,539
Goodwill	238,165	216,589
Permits and other intangibles, net	264,864	256,251
Total assets	920,333	805,488
Lodging Services
Segment Reporting Information [Line Items]
Property, plant and equipment, net	99,764	105,208
Goodwill	0	32,208
Permits and other intangibles, net	5,951	7,045
Total assets	142,948	181,357
Oil and Gas Field Services
Segment Reporting Information [Line Items]
Property, plant and equipment, net	139,137	156,286
Goodwill	0	0
Permits and other intangibles, net	9,347	14,862
Total assets	229,480	244,210
Corporate Items
Segment Reporting Information [Line Items]
Property, plant and equipment, net	87,655	91,494
Goodwill	0	0
Permits and other intangibles, net	0	0
Total assets	$ 587,969	$ 538,972

XML

SEGMENT REPORTING (Total Assets by Geographical Area) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 3,712,613	$ 3,431,428
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	2,944,936	2,575,746
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	767,677	851,949
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 0	$ 3,733

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Mar. 14, 2016	Dec. 07, 2012
Guarantor and Non-Guarantor Subsidiaries Financial Information [Abstract]
Subsidiary or equity method investee, cumulative percentage ownership after all transactions	100.00%
Senior unsecured notes, at 5.125%, due June 1, 2021 (2021 Notes) | Unsecured debt
Debt Instrument [Line Items]
Issuance of debt	$ 250,000,000.0	$ 250,000,000.0	$ 600,000,000.0

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Condensed Consolidating Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 257,857	$ 184,708	$ 179,191	$ 246,879
Intercompany receivables	0	0
Accounts receivable, net	512,376	496,004
Other current assets	279,698	240,484
Property, plant and equipment, net	1,648,571	1,532,467
Investments in subsidiaries	0	0
Intercompany debt receivable	0	0
Goodwill	470,633	453,105
Permits and other intangibles, net	507,337	506,818
Other long-term assets	36,141	17,842
Total assets	3,712,613	3,431,428
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	539,096	517,120
Intercompany payables	0	0
Closure, post-closure and remedial liabilities, net	171,431	167,846
Long-term obligations	1,632,577	1,382,543
Intercompany debt payable	0	0
Other long-term liabilities	268,564	267,637
Total liabilities	2,611,668	2,335,146
Stockholders’ equity	1,100,945	1,096,282
Total liabilities and stockholders’ equity	3,712,613	3,431,428
Reportable Legal Entities | Clean Harbors, Inc.
ASSETS
Cash and cash equivalents	51,334	11,017	11,008	1,006
Intercompany receivables	190,728	164,709
Accounts receivable, net	0	0
Other current assets	2,537	0
Property, plant and equipment, net	0	0
Investments in subsidiaries	2,813,894	2,547,307
Intercompany debt receivable	0	0
Goodwill	0	0
Permits and other intangibles, net	0	0
Other long-term assets	1,197	1,068
Total assets	3,059,690	2,724,101
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	22,619	20,813
Intercompany payables	299,848	220,762
Closure, post-closure and remedial liabilities, net	0	0
Long-term obligations	1,632,577	1,382,543
Intercompany debt payable	3,701	3,701
Other long-term liabilities	0	0
Total liabilities	1,958,745	1,627,819
Stockholders’ equity	1,100,945	1,096,282
Total liabilities and stockholders’ equity	3,059,690	2,724,101
Reportable Legal Entities | U.S. Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	170,183	83,479	66,074	154,147
Intercompany receivables	300,656	213,243
Accounts receivable, net	418,170	404,580
Other current assets	207,488	179,969
Property, plant and equipment, net	1,217,704	1,082,466
Investments in subsidiaries	488,437	522,067
Intercompany debt receivable	212,171	260,957
Goodwill	417,992	367,306
Permits and other intangibles, net	439,543	435,080
Other long-term assets	9,552	10,274
Total assets	3,881,896	3,559,421
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	438,298	424,588
Intercompany payables	224,593	195,287
Closure, post-closure and remedial liabilities, net	155,710	153,190
Long-term obligations	0	0
Intercompany debt payable	0	0
Other long-term liabilities	249,401	239,049
Total liabilities	1,068,002	1,012,114
Stockholders’ equity	2,813,894	2,547,307
Total liabilities and stockholders’ equity	3,881,896	3,559,421
Reportable Legal Entities | Foreign Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	36,340	90,212	102,109	91,726
Intercompany receivables	34,665	39,804
Accounts receivable, net	94,206	91,424
Other current assets	69,673	60,515
Property, plant and equipment, net	430,867	450,001
Investments in subsidiaries	0	0
Intercompany debt receivable	3,701	3,701
Goodwill	52,641	85,799
Permits and other intangibles, net	67,794	71,738
Other long-term assets	25,392	6,500
Total assets	815,279	899,694
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	78,179	71,719
Intercompany payables	1,608	1,707
Closure, post-closure and remedial liabilities, net	15,721	14,656
Long-term obligations	0	0
Intercompany debt payable	212,171	260,957
Other long-term liabilities	19,163	28,588
Total liabilities	326,842	377,627
Stockholders’ equity	488,437	522,067
Total liabilities and stockholders’ equity	815,279	899,694
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	0	$ 0	$ 0
Intercompany receivables	(526,049)	(417,756)
Accounts receivable, net	0	0
Other current assets	0	0
Property, plant and equipment, net	0	0
Investments in subsidiaries	(3,302,331)	(3,069,374)
Intercompany debt receivable	(215,872)	(264,658)
Goodwill	0	0
Permits and other intangibles, net	0	0
Other long-term assets	0	0
Total assets	(4,044,252)	(3,751,788)
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	0	0
Intercompany payables	(526,049)	(417,756)
Closure, post-closure and remedial liabilities, net	0	0
Long-term obligations	0	0
Intercompany debt payable	(215,872)	(264,658)
Other long-term liabilities	0	0
Total liabilities	(741,921)	(682,414)
Stockholders’ equity	(3,302,331)	(3,069,374)
Total liabilities and stockholders’ equity	$ (4,044,252)	$ (3,751,788)

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Consolidating Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Service revenues	$ 594,225	$ 760,667	$ 1,709,018	$ 2,158,344
Product revenues	135,295	132,699	354,095	403,749
Total revenues	729,520	893,366	2,063,113	2,562,093
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	385,542	523,676	1,148,212	1,484,936
Product cost of revenues	106,373	110,970	287,984	348,905
Total cost of revenues	491,915	634,646	1,436,196	1,833,841
Selling, general and administrative expenses	110,954	93,113	322,501	321,246
Accretion of environmental liabilities	2,476	2,577	7,529	7,795
Depreciation and amortization	73,360	69,060	215,655	205,189
Goodwill impairment charge	34,013	0	34,013	31,992
Income (loss) from operations	16,802	93,970	47,219	162,030
Other income (expense)	(198)	(139)	(737)	(390)
Gain on sale of business	16,431	0	16,431	0
Interest (expense) income	(21,565)	(19,017)	(62,192)	(57,704)
Equity in earnings of subsidiaries, net of taxes	0	0	0	0
Intercompany interest income (expense)	0	0	0	0
(Loss) income before (benefit) provision for income taxes	11,470	74,814	721	103,936
(Benefit) provision for income taxes	21,725	34,586	27,881	60,402
Net (loss) income	(10,255)	40,228	(27,160)	43,534
Other comprehensive (loss) income	(1,311)	(53,541)	43,348	(118,713)
Comprehensive (loss) income	(11,566)	(13,313)	16,188	(75,179)
Reportable Legal Entities | Clean Harbors, Inc.
Revenues:
Service revenues	0	0	0	0
Product revenues	0	0	0	0
Total revenues	0	0	0	0
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(598)	0	(1,185)	0
Product cost of revenues	0	0	0	0
Total cost of revenues	(598)	0	(1,185)	0
Selling, general and administrative expenses	23	25	84	75
Accretion of environmental liabilities	0	0	0	0
Depreciation and amortization	0	0	0	0
Goodwill impairment charge	0		0	0
Income (loss) from operations	575	(25)	1,101	(75)
Other income (expense)	0	0	0	0
Gain on sale of business	0		0
Interest (expense) income	(23,042)	(19,671)	(66,147)	(58,962)
Equity in earnings of subsidiaries, net of taxes	3,225	52,046	11,867	78,956
Intercompany interest income (expense)	0	0	0	0
(Loss) income before (benefit) provision for income taxes	(19,242)	32,350	(53,179)	19,919
(Benefit) provision for income taxes	(8,987)	(7,878)	(26,019)	(23,615)
Net (loss) income	(10,255)	40,228	(27,160)	43,534
Other comprehensive (loss) income	(1,311)	(53,541)	43,348	(118,713)
Comprehensive (loss) income	(11,566)	(13,313)	16,188	(75,179)
Reportable Legal Entities | U.S. Guarantor Subsidiaries
Revenues:
Service revenues	461,139	612,814	1,345,629	1,659,739
Product revenues	118,106	117,653	303,342	349,524
Total revenues	579,245	730,467	1,648,971	2,009,263
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	288,764	413,878	864,071	1,106,591
Product cost of revenues	94,050	101,778	252,512	315,322
Total cost of revenues	382,814	515,656	1,116,583	1,421,913
Selling, general and administrative expenses	88,652	72,811	253,189	247,472
Accretion of environmental liabilities	2,243	2,277	6,846	6,870
Depreciation and amortization	51,957	46,951	151,348	137,354
Goodwill impairment charge	0		0	4,164
Income (loss) from operations	53,579	92,772	121,005	191,490
Other income (expense)	(188)	204	124	483
Gain on sale of business	1,288		1,288
Interest (expense) income	1,456	613	3,851	1,115
Equity in earnings of subsidiaries, net of taxes	(22,341)	(2,341)	(58,031)	(38,920)
Intercompany interest income (expense)	5,235	5,666	15,891	17,679
(Loss) income before (benefit) provision for income taxes	39,029	96,914	84,128	171,847
(Benefit) provision for income taxes	35,803	44,868	72,260	92,891
Net (loss) income	3,226	52,046	11,868	78,956
Other comprehensive (loss) income	(1,311)	(53,541)	43,348	(118,713)
Comprehensive (loss) income	1,915	(1,495)	55,216	(39,757)
Reportable Legal Entities | Foreign Non-Guarantor Subsidiaries
Revenues:
Service revenues	145,780	162,680	399,216	546,790
Product revenues	20,072	17,591	58,176	63,239
Total revenues	165,852	180,271	457,392	610,029
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	110,070	124,625	321,153	426,530
Product cost of revenues	15,206	11,737	42,895	42,597
Total cost of revenues	125,276	136,362	364,048	469,127
Selling, general and administrative expenses	22,279	20,277	69,228	73,699
Accretion of environmental liabilities	233	300	683	925
Depreciation and amortization	21,403	22,109	64,307	67,835
Goodwill impairment charge	34,013		34,013	27,828
Income (loss) from operations	(37,352)	1,223	(74,887)	(29,385)
Other income (expense)	(10)	(343)	(861)	(873)
Gain on sale of business	15,143		15,143
Interest (expense) income	21	41	104	143
Equity in earnings of subsidiaries, net of taxes	0	0	0	0
Intercompany interest income (expense)	(5,235)	(5,666)	(15,891)	(17,679)
(Loss) income before (benefit) provision for income taxes	(27,433)	(4,745)	(76,392)	(47,794)
(Benefit) provision for income taxes	(5,091)	(2,404)	(18,360)	(8,874)
Net (loss) income	(22,342)	(2,341)	(58,032)	(38,920)
Other comprehensive (loss) income	(3,927)	(34,150)	24,403	(76,752)
Comprehensive (loss) income	(26,269)	(36,491)	(33,629)	(115,672)
Consolidating Adjustments
Revenues:
Service revenues	(12,694)	(14,827)	(35,827)	(48,185)
Product revenues	(2,883)	(2,545)	(7,423)	(9,014)
Total revenues	(15,577)	(17,372)	(43,250)	(57,199)
Cost of revenues (exclusive of items shown separately below)
Service cost of revenues	(12,694)	(14,827)	(35,827)	(48,185)
Product cost of revenues	(2,883)	(2,545)	(7,423)	(9,014)
Total cost of revenues	(15,577)	(17,372)	(43,250)	(57,199)
Selling, general and administrative expenses	0	0	0	0
Accretion of environmental liabilities	0	0	0	0
Depreciation and amortization	0	0	0	0
Goodwill impairment charge	0		0	0
Income (loss) from operations	0	0	0	0
Other income (expense)	0	0	0	0
Gain on sale of business	0		0
Interest (expense) income	0	0	0	0
Equity in earnings of subsidiaries, net of taxes	19,116	(49,705)	46,164	(40,036)
Intercompany interest income (expense)	0	0	0	0
(Loss) income before (benefit) provision for income taxes	19,116	(49,705)	46,164	(40,036)
(Benefit) provision for income taxes	0	0	0	0
Net (loss) income	19,116	(49,705)	46,164	(40,036)
Other comprehensive (loss) income	5,238	87,691	(67,751)	195,465
Comprehensive (loss) income	$ 24,354	$ 37,986	$ (21,587)	$ 155,429

XML

GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed consolidating statement of cash flows
Net cash from (used in) operating activities	$ 178,827	$ 309,593
Cash flows used in investing activities:
Additions to property, plant and equipment	(175,348)	(189,999)
Proceeds from sales of fixed assets	3,982	3,740
Acquisitions, net of cash acquired	(207,089)	(79,610)
Proceeds on sale of business, net of cash	47,134	0
Costs to obtain or renew permits	(1,920)	(4,633)
Purchases of available-for-sale securities	(598)	0
Investment in subsidiaries	0
Intercompany	0	0
Net cash used in investing activities	(333,839)	(270,502)
Cash flows from (used in) financing activities:
Change in uncashed checks	(7,084)	(21,882)
Exercise of stock options	230	397
Issuance of restricted shares, net of shares remitted	(2,500)	(2,027)
Repurchases of common stock	(15,869)	(69,155)
Excess tax benefit of stock-based compensation	21	102
Deferred financing costs paid	(2,614)	0
Payments of capital leases	0	(500)
Issuance of senior secured notes, including premium	250,625
Intercompany	0	0
Intercompany debt	0
Net cash from (used in) financing activities	222,809	(93,065)
Effect of exchange rate change on cash	5,352	(13,714)
Increase (decrease) in cash and cash equivalents	73,149	(67,688)
Cash and cash equivalents, beginning of period	184,708	246,879
Cash and cash equivalents, end of period	257,857	179,191
Consolidating Adjustments
Condensed consolidating statement of cash flows
Net cash from (used in) operating activities	0	0
Cash flows used in investing activities:
Additions to property, plant and equipment	0	0
Proceeds from sales of fixed assets	0	0
Acquisitions, net of cash acquired	0	0
Proceeds on sale of business, net of cash	0
Costs to obtain or renew permits	0	0
Purchases of available-for-sale securities	0
Investment in subsidiaries	250,625
Intercompany	18,118	71,182
Net cash used in investing activities	268,743	71,182
Cash flows from (used in) financing activities:
Change in uncashed checks	0	0
Exercise of stock options	0	0
Issuance of restricted shares, net of shares remitted	0	0
Repurchases of common stock	0	0
Excess tax benefit of stock-based compensation	0	0
Deferred financing costs paid	0
Payments of capital leases		0
Issuance of senior secured notes, including premium	(250,625)
Intercompany	(18,118)	(71,182)
Intercompany debt	0
Net cash from (used in) financing activities	(268,743)	(71,182)
Effect of exchange rate change on cash	0	0
Increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Clean Harbors, Inc. | Reportable Legal Entities
Condensed consolidating statement of cash flows
Net cash from (used in) operating activities	43,033	9,503
Cash flows used in investing activities:
Additions to property, plant and equipment	0	0
Proceeds from sales of fixed assets	0	0
Acquisitions, net of cash acquired	0	0
Proceeds on sale of business, net of cash	0
Costs to obtain or renew permits	0	0
Purchases of available-for-sale securities	(102)
Investment in subsidiaries	(250,625)
Intercompany	0	0
Net cash used in investing activities	(250,727)	0
Cash flows from (used in) financing activities:
Change in uncashed checks	0	0
Exercise of stock options	230	397
Issuance of restricted shares, net of shares remitted	(2,500)	(2,027)
Repurchases of common stock	(15,869)	(69,155)
Excess tax benefit of stock-based compensation	21	102
Deferred financing costs paid	(2,614)
Payments of capital leases		0
Issuance of senior secured notes, including premium	250,625
Intercompany	18,118	71,182
Intercompany debt	0
Net cash from (used in) financing activities	248,011	499
Effect of exchange rate change on cash	0	0
Increase (decrease) in cash and cash equivalents	40,317	10,002
Cash and cash equivalents, beginning of period	11,017	1,006
Cash and cash equivalents, end of period	51,334	11,008
U.S. Guarantor Subsidiaries | Reportable Legal Entities
Condensed consolidating statement of cash flows
Net cash from (used in) operating activities	128,182	240,713
Cash flows used in investing activities:
Additions to property, plant and equipment	(152,836)	(162,329)
Proceeds from sales of fixed assets	950	1,177
Acquisitions, net of cash acquired	(197,089)	(79,610)
Proceeds on sale of business, net of cash	18,885
Costs to obtain or renew permits	(949)	(4)
Purchases of available-for-sale securities	0
Investment in subsidiaries	0
Intercompany	(18,118)	(71,182)
Net cash used in investing activities	(349,157)	(311,948)
Cash flows from (used in) financing activities:
Change in uncashed checks	(6,064)	(16,635)
Exercise of stock options	0	0
Issuance of restricted shares, net of shares remitted	0	0
Repurchases of common stock	0	0
Excess tax benefit of stock-based compensation	0	0
Deferred financing costs paid	0
Payments of capital leases		(203)
Issuance of senior secured notes, including premium	250,625
Intercompany	0	0
Intercompany debt	63,118
Net cash from (used in) financing activities	307,679	(16,838)
Effect of exchange rate change on cash	0	0
Increase (decrease) in cash and cash equivalents	86,704	(88,073)
Cash and cash equivalents, beginning of period	83,479	154,147
Cash and cash equivalents, end of period	170,183	66,074
Foreign Non-Guarantor Subsidiaries | Reportable Legal Entities
Condensed consolidating statement of cash flows
Net cash from (used in) operating activities	7,612	59,377
Cash flows used in investing activities:
Additions to property, plant and equipment	(22,512)	(27,670)
Proceeds from sales of fixed assets	3,032	2,563
Acquisitions, net of cash acquired	(10,000)	0
Proceeds on sale of business, net of cash	28,249
Costs to obtain or renew permits	(971)	(4,629)
Purchases of available-for-sale securities	(496)
Investment in subsidiaries	0
Intercompany	0	0
Net cash used in investing activities	(2,698)	(29,736)
Cash flows from (used in) financing activities:
Change in uncashed checks	(1,020)	(5,247)
Exercise of stock options	0	0
Issuance of restricted shares, net of shares remitted	0	0
Repurchases of common stock	0	0
Excess tax benefit of stock-based compensation	0	0
Deferred financing costs paid	0
Payments of capital leases		(297)
Issuance of senior secured notes, including premium	0
Intercompany	0	0
Intercompany debt	(63,118)
Net cash from (used in) financing activities	(64,138)	(5,544)
Effect of exchange rate change on cash	5,352	(13,714)
Increase (decrease) in cash and cash equivalents	(53,872)	10,383
Cash and cash equivalents, beginning of period	90,212	91,726
Cash and cash equivalents, end of period	$ 36,340	$ 102,109