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Pacific Gas & Electric Company II Page 4 <br /> Stockton Service Center I{ <br /> i Stockton , California '} <br /> I � � <br /> F storage tank and associated piping werelremoved . Please refer to' <br /> Drawing No . 3 for the proposed test ;boring locations . The' <br /> maximum depth of sampling will be 25 feet . Based on semi--annual;, <br /> groundwater reports prepared for the San Joaquin County Flood <br /> I� ' <br /> Control and Water Conservation District , groundwater in the area] <br /> I <br /> of the project site should be located at a depth of approximately. <br /> 40 t 0 feet <br /> 0 5 ee below site grade . Based on the anticipated depth; <br /> ' ,. <br /> of groundwater in the area of the project site , the deepest test <br /> li <br /> boring proposed for this investigation would be terminated' <br /> approximately 20 feet above the groundwater bearing strata. <br /> The test borings will be advancedL ith a Mobile drill rig' <br /> using an 8 inch diameter hollow auge to achieve the desired. <br /> depths . A representative soil sample will be obtained from the, <br /> i <br /> bore hole using a split-barrel ring sampler equipped with pre- <br /> cleaned brass tubes . The sampler will be .driven or hydraulically. <br /> i� <br /> pushed approximately 18 inches into the soil . The lower 6-inch: <br /> i� <br /> portion o-f each sample will be retained for laboratory testing . <br /> Each soil sample will be retained' in the brass tube and <br /> banded and sealed with chain-of-custody seals . After all soil <br /> samples have been retrieved , the test borings will be backfilled <br /> with a bentonite slurry . The soil cuttings generated by the,; <br /> i <br /> { drilling operations will be stockpiled at the project site . <br /> ll <br /> { All samples obtained from the site ill for laboratory analyses <br /> a I <br /> will be cooled to 40C. for shipment tolthe laboratory . Strict. <br /> � ��re�wti�rung�a�otata7iea;�nc. <br /> i 4 . <br /> s Fresno Modesto Visalia Bakersfield <br /> 1 <br />