As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 3/11/08‡ Clean Harbors Inc.                10-K       12/31/07    7:1.8M                                   Toppan Merrill-FA        
 2/29/08  Clean Harbors Inc.                NT 10-K    12/31/07    1:61K                                    Toppan Merrill/FA        

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	10-K	Annual Report — Form 10-K.
	NT 10-K	Notice of a Late Filing of a Form 10-K Annual Report — Form 12b-25.