Clean Harbors Completes Acquisition Of Teris L.L.C.

Transaction Expected to be Accretive by Year-End

Norwell, MA — Clean Harbors, Inc., the leading provider of environmental and hazardous waste management services throughout North America, announced that on August 18, 2006, it completed the acquisition of Teris L.L.C., an environmental services company based in Dallas, Texas. Clean Harbors acquired all of the membership interests in Teris for approximately $52.7 million in cash, including $10.3 million in net working capital, from SITA U.S.A., Inc., a subsidiary of Suez Environnement, S.A.

"Teris' operations represent an ideal fit with our existing disposal facilities," said Alan S. McKim, Chairman and Chief Executive Officer. "Our investment in Teris further improves our ability to service our customers and demonstrates our commitment to maintaining the largest array of service offerings in our industry. We believe that we can leverage our North American network of waste collection and routing capabilities and underutilized rail assets to achieve substantial cost efficiencies and dramatic gains in productivity at Teris' operations."

Teris operates an incineration facility in El Dorado, Arkansas and a treatment, storage and disposal facility located in Wilmington, California. The company currently has more than 550 employees and several field locations. In 2005, Teris reported revenue of approximately $95 million. Clean Harbors expects some limited customer attrition. The transaction offers several opportunities for synergies, particularly in the area of outsourced transportation, and is expected to be accretive by year-end. In the coming weeks, Clean Harbors will begin a comprehensive evaluation of Teris' operations to better gauge the revenue contribution going forward and level of operating costs required by the acquisition.

"We have commenced the integration process and anticipate completing the implementation of our primary processes and systems in a relatively short period of time," said McKim. "We are pleased to welcome the Teris team to Clean Harbors. Working together, we believe this transaction will be beneficial to both Teris' employees and the existing customers of both companies."

SOURCE: Clean Harbors, Inc.