Clean Harbors’ Presentation at the Baird Business Solutions Conference to be Webcast Live on February 25

Norwell, MA – February 19, 2009 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and hazardous waste management services throughout North America, today announced that Chairman and Chief Executive Officer, Alan S. McKim, and Executive Vice President and Chief Financial Officer, James M. Rutledge, will be presenting at Baird’s Business Solutions Conference. The conference is being held February 25-26, 2009 at the Four Seasons Hotel in Boston.

Clean Harbors’ presentation will take place at 1:30 p.m. (ET) on Wednesday, February 25, 2009 and will be webcast live. To access the live or archived webcast, visit the “Investor Relations” portion of Clean Harbors’ website at www.cleanharbors.com.

About Clean Harbors

Clean Harbors is North America's leading provider of environmental and hazardous waste management services. With an unmatched infrastructure of waste management facilities, Clean Harbors serves over 47,000 customers, including more than 325 Fortune 500 companies, thousands of smaller private entities and numerous federal, state and local governmental agencies. Clean Harbors’ Technical Services provides a broad range of hazardous material management and disposal services including hazardous and non-hazardous waste recycling, treatment and disposal, CleanPack® laboratory chemical packing, and household hazardous waste management services. Clean Harbors’ Site Services provides field services, industrial services, vacuum services, emergency response and disaster recovery, transformer services, tank cleaning and decontamination.

Headquartered in Norwell, Massachusetts, Clean Harbors has more than 100 locations strategically positioned throughout North America in 36 U.S. states, six Canadian provinces, Mexico and Puerto Rico. For more information, visit www.cleanharbors.com.

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