Clean Harbors CFO Resigns

Date: February 5, 2013

Source: Clean Harbors, Inc.

Clean Harbors, Inc. (Norwell, MA) said in a securities filing that its Chief Financial Officer, Robert E. Gagnon, hired last August, has resigned his post but "will continue to perform transitional services until March 31." James M. Rutledge, currently chief operating officer, will resume Mr. Gagnon's role as CFO, a position he held until Mr. Gagnon was hired. The company stressed that the reason for Mr. Gagnon's departure had nothing to do with any disagreement with the company or its "policies, practices or financial statements," and thanked him for his service.

February 5, 2013

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On February 4, 2013, Robert E. Gagnon resigned as our Chief Financial Officer. Mr. Gagnon, who has served as Chief Financial Officer since August 2012, will continue to perform transitional services until March 31, 2013. Mr. Gagnon did not resign due to any disagreement with the Company regarding any matter relating to the Company's operations, policies, practices or financial statements, and we thank him for his contributions to the Company and wish him well with his future endeavors.

Also on February 4, 2013, James M. Rutledge, currently Vice Chairman, President and Chief Operating Officer of the Company, was designated by the Board of Directors to resume his role as Chief Financial Officer, which he previously held from August 2005 through August 2012. Mr. Rutledge will now serve as Vice Chairman, President and Chief Financial Officer. Further biographical information about Mr. Rutledge is available in our 2012 proxy statement filed with the Securities and Exchange Commission on March 23, 2012 and is incorporated herein by reference.

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