NORWELL, Mass.–(BUSINESS WIRE)–Clean Harbors, Inc. (“Clean Harbors” or the “Company”) (NYSE: CLH), a leading provider of environmental and industrial services throughout North America, today announced the completion of its previously announced acquisitions of EnviroServe, a national provider of environmental and waste management services, and ES&H, a leading regional provider of environmental and emergency response services in the Gulf region. The two transactions were completed for a com