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

 2/11/15  Relational Investors LLC          SC 13D/A               2:632K Clean Harbors Inc.                Toppan Merrill/FA        
          David H. Batchelder³
          Ralph V. Whitworth³
          Relational Coast Partners, L.P.³
          Relational Fund Partners, L.P.³
          Relational Investors IX, L.P.³
          Relational Investors Mid-Cap Fund I, L.P.³
          Relational Investors Mid-Cap Fund II, L.P.³
          Relational Investors XV, L.P.³
          Relational Investors XVI, L.P.³
          Relational Investors XX, L.P.³
          Relational Investors XXIII, L.P.³
          Relational Investors XXIV, L.P.³
          RH Fund 1, L.P.³
  2/5/15  Relational Investors LLC          SC 13D/A               2:1.2M Clean Harbors Inc.                Toppan Merrill/FA        
          David H. Batchelder³
          Ralph V. Whitworth³
          Relational Coast Partners, L.P.³
          Relational Fund Partners, L.P.³
          Relational Investors IX, L.P.³
          Relational Investors Mid-Cap Fund I, L.P.³
          Relational Investors Mid-Cap Fund II, L.P.³
          Relational Investors XV, L.P.³
          Relational Investors XVI, L.P.³
          Relational Investors XX, L.P.³
          Relational Investors XXIII, L.P.³
          Relational Investors XXIV, L.P.³
          RH Fund 1, L.P.³
 1/26/15  Relational Investors LLC          SC 13D/A               2:1.3M Clean Harbors Inc.                Toppan Merrill/FA        
          David H. Batchelder³
          Ralph V. Whitworth³
          Relational Coast Partners, L.P.³
          Relational Fund Partners, L.P.³
          Relational Investors IX, L.P.³
          Relational Investors Mid-Cap Fund I, L.P.³
          Relational Investors Mid-Cap Fund II, L.P.³
          Relational Investors XV, L.P.³
          Relational Investors XVI, L.P.³
          Relational Investors XX, L.P.³
          Relational Investors XXIII, L.P.³
          Relational Investors XXIV, L.P.³
          RH Fund 1, L.P.³
 4/24/14  Relational Investors LLC          SC 13D                 3:2.8M Clean Harbors Inc.                Toppan Merrill/FA        
          David H. Batchelder³
          Ralph V. Whitworth³
          Relational Coast Partners, L.P.³
          Relational Fund Partners, L.P.³
          Relational Investors IX, L.P.³
          Relational Investors Mid-Cap Fund I, L.P.³
          Relational Investors Mid-Cap Fund II, L.P.³
          Relational Investors XV, L.P.³
          Relational Investors XVI, L.P.³
          Relational Investors XX, L.P.³
          Relational Investors XXIII, L.P.³
          Relational Investors XXIV, L.P.³
          RH Fund 1, L.P.³

____________
¹	Filing/Form Type:
	SC 13D	Statement of Acquisition of Beneficial Ownership by an “Active” Investor — Schedule 13D.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.