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Q2 2013 Financial Results

Environmental Liabilities Summary ■ $218.3M as of 6/30/13 - Highest level was $268M in 2002 $47 million in closure/post closure (asset retirement obligations) - Landfill closure and post closure ($29 million) Non-landfill closure liabilities ($18 million) ■ $172 million in remedial obligations - Landfill ($6 million) - - Non-landfill ($74 million) - Superfund ($15 million) Discontinued facilities ($77 million) 149 CleanHarbor

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