Clean Harbors (CLH) 8-K Other Events

EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 33-60187, 333-46159, 333-63662, 333-134381, 333-134382, and 333-166963 on Form S-8 and Registration Statement No. 333-150296 on Form S-3 of our report dated March 1, 2011 (July 15, 2011 as to the effects of the segment change described in Note 2, 3, and 16) relating to the financial statements and financial statement schedule of Clean Harbors, Inc., appearing in this Current Report on Form 8-K dated July 15, 2011 of Clean Harbors, Inc.

/s/ DELOITTE & TOUCHE LLP

Boston, Massachusetts

July 15, 2011

EXHIBIT 99.2

2010 Unaudited Recast Segment Information by Quarter

	Summary of Operations (in thousands)
	For the Three Months Ended
	March 31, 2010			June 30, 2010			September 30, 2010			December 30, 2010
Direct Revenues:
Technical Services	$	158,466		$	174,546		$	182,843		204,299
Field Services	46,476			153,637			174,306			79,659
Industrial Services	91,094			98,399			81,962			78,320
Oil and Gas Field Services	59,407			45,378			49,032			55,260
Corporate Items	(547		)	(321		)	(492		)	(480		)
Total	354,896			471,639			487,651			417,058
Cost of Revenues (exclusive of certain items shown separately)(1):
Technical Services	110,046			112,797			119,737			129,121
Field Services	35,703			104,324			117,569			55,007
Industrial Services	66,491			69,144			58,090			60,457
Oil and Gas Field Services	45,611			37,056			38,647			45,045
Corporate Items	2,566			959			1,230			1,140
Total	260,417			324,280			335,273			290,770
Selling, General & Administrative Expenses:
Technical Services	15,240			17,364			16,911			20,083
Field Services	5,742			7,710			8,307			8,458
Industrial Services	4,743			5,133			4,925			5,111
Oil and Gas Field Services	2,300			2,356			(88		)	2,390
Corporate Items	17,459			18,166			23,564			19,938
Total	45,484			50,729			53,619			55,980
Adjusted EBITDA(2):
Technical Services	33,180			44,385			46,195			55,095
Field Services	5,031			41,603			48,430			16,194
Industrial Services	19,860			24,122			18,947			12,752
Oil and Gas Field Services	11,496			5,966			10,473			7,825
Corporate Items	(20,572		)	(19,446		)	(25,286		)	(21,558		)
Total	$	48,995		$	96,630		$	98,759		$	70,308

(1)Items shown separately on the statements of income consist of (i) accretion of environmental liabilities and (ii) depreciation and amortization.

(2)See footnote 3 under Item 6, “Selected Financial Data,” for a discussion of Adjusted EBITDA.