CLHB Clean Harbors (MM)

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's Audit Committee of its Board of Directors has appointed Deloitte & Touche LLP as Clean Harbors' new independent registered public accounting firm, replacing PricewaterhouseCoopers. While this appointment is effective immediately, PricewaterhouseCoopers will assist Clean Harbors and Deloitte & Touche to ensure a smooth transition of auditing services. "We appreciate the dedicated service that PricewaterhouseCoopers' Boston office has provided to Clean Harbors through the years," stated Clean Harbors Chief Financial Officer James M. Rutledge. "The selection of Deloitte & Touche follows a competitive proposal process conducted by the Audit Committee, with management's assistance. Deloitte & Touche emerged during this process as the best fit for Clean Harbors' long-term needs." PricewaterhouseCoopers has confirmed that the change in auditor was not related to any disagreement about accounting principles or practices, financial statement disclosure or auditing scope or procedure between the Company and PricewaterhouseCoopers. In conjunction with this change, Clean Harbors filed a Form 8-K with the Securities and Exchange Commission today. This filing can be accessed from the Investor Relations section at www.cleanharbors.com. 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 Braintree, 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.