Leadership COMBINING THE STRENGTH OF TWO INDUSTRY LEADERS Clean Harbors Acquisition of Safety-Kleen On December 28th, 2012 Safety-Kleen became a part of Clean Harbors, Inc., the leading provider of environmental, energy and industrial services in North America. The combined strength of the two organizations significantly enhances the sustainability options available to existing and new customers. It also leverages the complementary assets that both organizations bring to the marketplace, including industry leading service and expertise. Clean Harbors provides additional waste stream management capabilities, especially in the area of Emergency Response. They also provide broader waste treatment capabilities, including direct access to a substantially expanded waste disposal treatment network. With combined experience of almost one hundred years, the companies can leverage operating efficiencies, providing customers with better protection and reduced risk of their waste disposal. Coupled with Clean Harbors’ history of innovation and commitment, Safety-Kleen customers will receive environmental services the likes of which have never been seen before in the industry. For more information on Clean Harbor services, visit www.cleanharbors.com. Safety-Kleen Leadership Team Jerry E. CorrellPresidentDave EckelbargerExecutive Vice President of Branch Sales and ServiceCurt KnappExecutive Vice President, Marketing and Oil Re-refining SalesChip DuffieSenior Vice President Central Compliance and SustainabilityJean LeeSenior Vice President, Human ResourcesDanny AndersonSenior Vice President of Supply Chain