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Q2 2013 Financial Results

62 Automotive Markets Represents ~40% of Q2 2013 S-K ENV revenue ■ 18 classes Top 5 classes - 82% of revenue ■ Used oil volume ~85% of total ■ Market characterizations 9% Large number of customers 11% - Heavy route density - High-quality used engine oil - Shorter sales cycle Q2 2013 Revenue Top 5 Automotive Classes 9% 20% 33%. Auto Maint ■Dealerships Auto Retail ■Trucking & Trans Quick Lubes Strong S-K brand recognition CleanHarbors

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