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Stanw <br /> 76(Former BP)Service Station No. 11192 <br /> March 10,2011 <br /> Page 2 <br /> Equipment Decontamination <br /> Equipment that could potentially contact subsurface media and compromise the integrity of <br /> the samples is carefully decontaminated prior to drilling and sampling. Drill augers and <br /> other large pieces of equipment are decontaminated using high pressure hot water spray. <br /> Samplers, groundwater pumps, liners and other equipment are decontaminated in an <br /> Alconox scrub solution and double rinsed in clean tap water rinse followed by a final distilled <br /> water rinse. <br /> The rinsate and other wastewater are contained in 55-gallon DOT-approved drums, labeled <br /> (to identify the contents, generation date and project) and stored on-site pending waste <br /> profiling and disposal. <br /> I <br /> Soil Cuttings and Rinsate/Purge Water <br /> Soil cuttings and rinsate/purge water generated during drilling and sampling are stored on-site <br /> in DOT-approved 55-gallon steel drums pending characterization. A label is affixed to the <br /> drums indicating the contents of the drum, suspected contaminants, date of generation, and <br /> the boring number from which the waste is generated. The drums are removed from the site <br /> by a licensed waste disposal contractor to an appropriate facility for treatment/recycling <br />