CLEAN HARBORS, INC.
                             1501 Washington Street
                               Braintree, MA 02184
                               Tel. (781) 849-1800

                                                          September 21, 2005


Securities and Exchange Commission
Division of Corporation Finance
Washington, DC  20549

Re:  Clean Harbors, Inc.
     Registration Statement on Form S-3
     File No. 333-126205

Ladies and Gentlemen:

     Clean Harbors, Inc. (the "Company") hereby withdraws the request
for acceleration of the Registration Statement described above which
the Company previously filed. That request, which is hereby withdrawn,
had been that the effective date of such Registration Statement be
accelerated so that the Registration Statement, as amended, shall
become effective at 3:00 p.m. on Thursday, September 22, 2005 or as
soon thereafter as practicable.

                                     Very truly yours,

                                     CLEAN HARBORS, INC.

                                     By: /s/ James M. Rutledge
                                         ---------------------
                                         James M. Rutledge,
                                         Executive Vice President