$CLH SEC Filings

Filing Filed On
S-4/A 11 Oct 2012
S-4/A 24 Sep 2012
S-4/A 25 Jul 2011
S-4/A 20 Jul 2011
S-4/A 03 Nov 2009
FORM S-4/A 21 Sep 2005
FORM S-4/A 31 Aug 2005