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Q2 2013 Financial Results

67 Growth Strategy - Cross-Sell to S-K Customers Standby ER Agreements (SERA) sold to S-K customers - - Responses performed by CLH Field Services ER agreements executed ~300+ SERA subscription revenue $100K CLH revenue from ERs ~$2.2M ■ Total Project Management services provided by CLH Field Services and Lab-Pack Services formerly serviced by competitors Clean Harbors

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