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r <br /> December 4, 1989 <br /> Work Plan Evaluation of Soil and Ground Water AGS 38032-3W <br /> + Unocal Station No, 6981, Stockton, California <br /> the field PID, then the soil sample having the next highest reading on the PID will be <br /> les selected for testing will be analyzed for TP <br /> submitted for chemical analyses. Sail sampH <br /> thod 8015 with EPA extraction Method 5030, and for BTEX <br /> as gasoline using EPA Me <br /> using EPA Method 8020. <br /> One ground-water sample will be collected from each monitoring well. These ground- <br /> water samples will be analyzed for TPH as gasoline using modified EPA Method 8015 with <br /> +w� g EPA Method 602. Groundwater samples from <br /> EPA extraction Method 5030,BTEC usin <br /> four of the monitoring wells will be analyzed for nitrate-N using EPA Method 353.1, and <br /> total and fecal coliform bacteria. The nitrate and coliform analyses are required by the San <br /> R <br /> en monitoring wells are constructed within 50 feet <br /> Joaquin County Public Health Services wh <br /> tection limits suitable for the tests requested and concentr <br /> of sanitary sewer lines. Deations <br /> nalysis reports. The analyses will be performed <br /> present will be slated on the laboratory a <br /> by a laboratory certified by the State of California. <br /> EVALUATION OF GROUND-WATER GRADIENT <br /> Groundwater levels will be measured and well elevations will be surveyed to evaluate the <br /> The elevation of the tops of the monitoring well <br /> ground-water gradient beneath the site. <br /> - -- - - -— - <br /> --- -- --- <br /> casings will be referenced._to alocal-benchmark-b alicensed--land-suryevor __ e_static <br /> water levels will be measured with an electronic water-level indicator to the nearest 0.01 <br /> w <br /> sof 22 <br /> "' APP/18d 6r'eoSYstel"s ------ <br />