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Q2 2013 Financial Results

Incineration Performance: U.S. ■ Capacity expansion of approximately 10% since 2007 ■ Utilization increasing - 150 basis points on average annually ◉ Optimization of waste streams at higher utilization levels Tons (in thousands) 42 Utilization 360 350 340 330 94% 92% 90% 88% 86% % 84% 320 310 82% 80% 300 78% 2007 2008 2009 2010 2011 2012 2013 Clean Harbors

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