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I <br /> I� <br />' Page 6 TL 686-082-02 <br /> i <br /> the depth at which the initial soil samples were taken at the <br /> time the underground transformer oil, storage tank, sump, and <br /> associated piping were removed. Please refer to Drawing No, 3 <br /> I <br /> for the test boring locations . <br /> 4 <br /> The soil samples were obtained from the bore hole using a <br /> Ii <br /> split-barrel ring sampler equipped with pre-cleaned brass tubes . <br /> The sampler was driven or hydraulically pushed approximately 12 w <br /> inches into the soil . The lower 6-inch portion of each sample <br /> I <br /> was retained for laboratory testing. j <br /> Each soil sample was retained in brass tubes . The ends of <br /> each brass tube were covered with aluminum foil and plastic end <br /> caps, sealed with electrical tape, and immediately cooled to 4�C <br /> for shipment to our :Fresno laboratory.l Strict chain-of-custody <br /> procedures were followed during the transportation and handling 4 <br /> of the soil samples . : <br /> j <br /> The split-barrel sampler was cleaned using a hot water <br /> L (steam) washer between sampling in 1ervals to minimize the <br /> potential for cross-contamination. Th l# lead auger and associated f <br /> I I <br /> I <br /> drilling equipment were also cleaned using the hot water washer <br /> between borings . All field work associated with the collection <br /> of soil samples from the project site were supervised by an <br /> engineer from our firm. <br /> Each soil sample retained for laboratory analysis was <br /> analyzed for the presence and concentration of Total Volatile <br /> Y <br /> Organic Hydrocarbons, and oil and grease content using the <br /> following test methods : !I <br /> u ��.enc. <br /> I, Fresno Modesto Visalia Bakersfield j <br />