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SEGO <br /> SECOR INTERNATIONAL INCORPORATED <br /> STANDARD PROCEDURE FOR <br /> EQUIPMENT DECONTAMINATION <br /> Equipment that could potentially contact subsurface media and compromise the integrity of the <br /> samples is carefully decontaminated prior to drilling and sampling. Drill augers and other large <br /> pieces of equipment are decontaminated using high pressure hot water spray. Samplers, <br /> groundwater pumps, liners and other equipment are decontaminated in an Alconox scrub <br /> solution and double rinsed in clean tap water rinse followed by a final distilled water rinse. <br /> The rinseate and other wastewater are contained in 55-gallon DOT-approved drums, labeled (to <br /> identify the contents, generation date and project) and stored on-site pending waste profiling <br /> and disposal. <br /> • <br /> • <br /> STTC 1Q06 Final Report D-3 May 1,2006 <br /> 770T.43673.12.0002 <br />