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SECOR INTERNATIONAL INCORPORATED <br /> STANDARD PROCEDURE FOR <br /> EQUIPMENT DECONTAMINATION <br /> All 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 solution <br /> and double rinsed In clean tap water rinse followed by a final distilled water rinse <br /> The Ansate and other wastewater are contained In 55-gallon California Department of Transportation <br /> (DOT)-approved drums, labeled (to Identify the contents, generation date and project) and stored on- <br /> site pending waste profiling and disposal <br /> I IConocoPhillips\Tosco Marketing11119310MR120MR04 Final doc <br />