Clean Harbors to Release 2Q Earnings on August 8, 2006

Date: July 21, 2006

Source: Clean Harbors, Inc.

Clean Harbors to Announce Second-Quarter 2006 Financial Results On August 8

NORWELL, Mass.--(BUSINESS WIRE)--July 21, 2006--Clean Harbors, Inc. (NASDAQ: CLHB), the leading provider of environmental and hazardous waste management services throughout North America, will host its second-quarter 2006 conference call on Tuesday, August 8, 2006 at 9:00 a.m. ET.

On the call, Chairman, President and Chief Executive Officer Alan McKim and Executive Vice President 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 second-quarter conference call webcast should visit the Investor Relations section of the Company's website at The live call also can be accessed by dialing (800) 289-0494 or (913) 981-5520 (confirmation code: 8892444) 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, 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

James M. Rutledge, 781-792-5100
Executive Vice President and Chief Financial Officer


Bill Geary, 781-792-5130
Executive Vice President and General Counsel

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