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June 7, 1988 AGS ,lob No. 018073-1 <br /> Marlowe Properties, Stockton, California <br /> if significant contamination of the Around water is detected, at <br /> least two additional wells will be constructed to delineate the <br /> lateral extent of contamination and evaluate the ground-water <br /> gradient. <br /> LABORATOR`! ANALYSES <br /> r ) Soil samples selected for testing from each boring will include► <br /> the samples showing the highest field reading with an organic vapor <br /> analyzer and hither the sample directly above ground water or the <br /> sample 10 feet below any subjective field evidence of <br /> contamination. Samples will be analyzod for total petroleum <br /> hydrocarbons (TPH) by EPA Method 8015 (modified for gasoline) and <br /> Us BTEX by EPA Method 8020. hater samples will be analyzed for TPH <br /> and BT'EX by EPA Methods 8015 (modified for gasoline) and 602, <br /> respectively. Detection limits suitable for the tests requested, <br /> ►r the sample matrix, and concentrations present will be stated on <br /> the laboratory report. The analyses will be performed by a <br /> laboratory certified by the State: of California for these <br /> analyses. <br /> ;tom. 12 <br /> APPlIed GeOSYstems <br />