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Q2 2013 Financial Results

97 Oil and Gas Field Services Rationale ◉ Why is it important for CLH to be in this sector? - Environmental responsibility a key focus in Oil and Gas - Increasing federal regulations aligned with CLH expertise - - Drives volumes into our disposal network Growth potential with new and large customer base ■ Our environmental service reputation differentiates us because: - Industry increasingly compliance driven - Market shifting to safety/environmentally focused providers - Integration of complementary services CleanHarbors

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