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EXHIBIT 12.1

Ratio of Earnings to Fixed Charges

CLEAN HARBORS, INC. AND SUBSIDIARIES

	For the Nine Months Ended September 30,						For the Year Ended December 31,
	2012			2011			2011			2010			2009			2008			2007
	(In thousands)
Income from operations before income taxes	$	105,287		$	136,302		$	184,678		$	184,477		$	61,472		$	93,977			72,238
Add (Subtract):
Capitalized interest		(111	)		(310	)		(122	)		(541	)		(236	)		(157	)		(1,179	)
Amortization of capitalized interest		357			361			657			616			567			542			435
Fixed charges (see calculation below)		40,584			33,351			45,951			35,620			23,511			18,736			22,771
Income from operations before income taxes as adjusted	$	146,117		$	169,704		$	231,165		$	220,172		$	85,314		$	113,098		$	94,265
Fixed charges:
Interest expense, net	$	33,836		$	28,047		$	39,389		$	27,936		$	15,999		$	8,403		$	13,157
Interest income		623			700			798			874			825			5,094			4,023
Capitalized interest		111			310			122			541			236			157			1,179
Amortization of capitalized interest		(357	)		(361	)		(657	)		(616	)		(567	)		(542	)		(435	)
Preferred stock dividend		—			—			—			—			—			—			206
Portion of operating lease rental expenses deemed to be representative of the interest factor		6,371			4,655			6,300			6,885			7,018			5,624			4,641
Fixed charges	$	40,584		$	33,351		$	45,951		$	35,620		$	23,511		$	18,736		$	22,771
Ratio of earnings to fixed charges		3.6x			5.1x			5.0x			6.2x			3.6x			6.0x			4.1x

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EXHIBIT 12.1

Ratio of Earnings to Fixed Charges CLEAN HARBORS, INC. AND SUBSIDIARIES