Clean Harbors Moves Headquarters to Norwell, MA

Date: June 13, 2006

Source: Clean Harbors, Inc.

Clean Harbors, Inc. ("Clean Harbors") (NASDAQ: CLHB), the leading provider of environmental and hazardous waste management services throughout North America, today announced that the Company has successfully completed the relocation of its corporate headquarters to Norwell, Massachusetts.

"Through careful execution of our growth strategy, we have been rapidly extending our nationwide presence by opening new offices and expanding our pipeline of business," stated Alan S. McKim, Chairman and Chief Executive Officer. "In order to manage this growth, we have consolidated two previous corporate offices into our new Norwell headquarters thus housing our key functions in one centralized location. Our new headquarters will provide us with the facilities and infrastructure necessary to accommodate our next stage of growth as we pursue our goal of becoming a $1 billion operation. The new facility features an open floor plan that promotes productivity and efficient workflow across all departments, while our advanced voice-over-IP (VoIP) phone system and state-of-the-art data center showcase the Company's ongoing commitment to technological innovation."

The Company, which previously was located in Braintree, is now located at 42 Longwater Drive in Norwell, Massachusetts. The Company's new corporate number is 781-792-5000. The Company's emergency response line remains 1-800-OIL-TANK.

About Clean Harbors, Inc.

Clean Harbors, Inc. is North America's leading provider of environmental and hazardous waste management services. With an unmatched infrastructure of 48 waste management facilities, including nine landfills, five incineration locations and seven wastewater treatment centers, the Company provides essential services to over 45,000 customers, including more than 175 Fortune 500 companies, thousands of smaller private entities and numerous federal, state and local governmental agencies. 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

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