Clean Harbors to Present at Bank of America Merrill Lynch Global Industries Conference on December 15

Norwell, MA – December 7, 2010 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental, energy and industrial services and hazardous waste management services throughout North America, today announced that Chairman and Chief Executive Officer Alan S. McKim and Chief Financial Officer James M. Rutledge will be presenting at the Bank of America Merrill Lynch Global Industries Conference on December 15 at 10:35 a.m. (ET).

Investors can hear the live webcast of the Clean Harbors’ presentation on the “Investor Relations” portion of the Company’s website at www.cleanharbors.com. The presentation will also be archived on the website.

About Clean Harbors

Clean Harbors is the leading provider of environmental, energy and industrial services and hazardous waste management services throughout North America. The Company serves over 50,000 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 175 locations, including over 50 waste management facilities, throughout North America in 36 U.S. states, seven Canadian provinces, Mexico and Puerto Rico. The Company also operates international locations in Bulgaria, China, Singapore, Sweden, Thailand and the United Kingdom. For more information, visit www.cleanharbors.com.

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