EXHIBIT 12.1

Ratio of Earnings to Fixed Charges

CLEAN HARBORS, INC. AND SUBSIDIARIES

	For the Year Ended December 31,
	2012			2011			2010			2009			2008
	(In thousands, except ratio)
Income from operations before income taxes	$	127,730		$	184,678		$	184,477		$	61,472		$	93,977
Add (Subtract):
Capitalized interest	(155		)	(451		)	(541		)	(236		)	(157		)
Amortization of capitalized interest	715			678			616			567			541
Fixed charges (see calculation below)	54,977			46,260			35,620			23,511			18,736
Income from operations before income taxes as adjusted	$	183,267		$	231,165		$	220,172		$	85,314		$	113,098
Fixed charges:
Interest expense, net	$	47,287		$	39,389		$	27,936		$	15,999		$	8,403
Interest income	846			798			874			825			623
Capitalized interest	155			451			541			236			157
Amortization of capitalized interest	(715		)	(678		)	(616		)	(567		)	(541		)
Preferred stock dividend	—			—			—			—			—
Portion of operating lease rental expenses deemed to be representative of the interest factor	7,404			6,300			6,885			7,018			5,624
Fixed charges	$	54,977		$	46,260		$	35,620		$	23,511		$	18,736
Ratio of earnings to fixed charges	3.3x			5.0x			6.2x			3.6x			6.0x