Clean Harbors to Announce First-Quarter 2012 Financial Results on May
2

NORWELL, Mass., Apr 19, 2012 (BUSINESS WIRE) --Clean Harbors, Inc. (NYSE: CLH), the leading provider of environmental, energy and industrial services throughout North America, will host its first-quarter 2012 conference call on Wednesday, May 2, 2012 at 9:00 a.m. ET.

On the call, Chairman, President and Chief Executive Officer Alan S. McKim and Vice Chairman and Chief Financial Officer James M. Rutledge will discuss Clean Harbors' financial results, business outlook and growth strategy.

Those who wish to listen to the first-quarter 2012 conference call webcast should visit the Investor Relations section of the Company's website at www.cleanharbors.com. The live call also can be accessed by dialing 201.689.8881 or 877.709.8155 prior to the start of the call. If you are unable to listen to the live call, the webcast will be archived on the Company's website.

About Clean Harbors

Clean Harbors is the leading provider of environmental, energy and industrial services throughout North America. The Company serves more than 60,000 customers, including a majority of the Fortune 500 companies, thousands of smaller private entities and numerous federal, state, provincial and local governmental agencies.

Headquartered in Norwell, Massachusetts, Clean Harbors has more than 200 locations, including over 50 waste management facilities, throughout North America in 37 U.S. states, seven Canadian provinces, Mexico and Puerto Rico. For more information, visit www.cleanharbors.com.

SOURCE: Clean Harbors, Inc.

Clean Harbors, Inc.
James M. Rutledge, 781-792-5100
Vice Chairman and Chief Financial Officer
InvestorRelations@cleanharbors.com
or
Sharon Merrill Associates
Jim Buckley, 617-542-5300
Executive Vice President
clh@investorrelations.com