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11 <br /> lowered into the wells via new dedicated poly cords, samples collected, and gently <br /> poured into two laboratory provided clean glass VOA vials Each VOA vial was <br /> ' immediately sealed, checked for headspace, labeled with the date, time and location and <br /> placed in a cooler containing blue ice at V Celsius <br /> ' The samples were transported under strict chain-of-custody protocol to GeoAnalytical <br /> Laboratories in Modesto, California for analysis All samples were delivered to the <br /> analytical laboratory within four hours from their time of collection Appendix A <br /> ' contains analytical data and chain-of-custody forms Table 2 summarizes the analytical <br /> results from the monitoring well samples for the December 21, 1995 sampling event <br /> ' Analytical results from previous sampling events are presented in Table 4 <br /> 4.2 Water Supply Well Sample Collection <br /> Two water supply wells (northern and southern) were sampled on December 21, 1995 <br /> To accomplish water sampling, two brass spigots were installed at each well head by a <br /> tlicensed plumber The spigots were turned on, and water samples were collected after <br /> each well pump had run for approximately five minutes to ensure fresh well water was <br /> collected Water sampling was conducted under the direct supervision of the San Joaquin <br /> ' County EHDIPHS Analytical results of the well water samples are presented in Table 3 <br /> r� <br /> 5,0 GROUNDWATER ANALYTICAL RESULTS <br /> II� <br /> 5.1 Laboratory Analysis of Ground Water and Well Water Samples <br /> All ground water samples were submitted to GeoAnalytical Laboratories of Modesto, <br /> California and were analyzed for the following constituents by the indicated methods <br /> • Total Petroleum Hydrocarbons (TPH) - Gasoline, Method 5030/LUFT <br /> Detection limit 0 05 µg/L <br /> • Benzene, Toluene, Ethyl benzene, and Xylenes (BTEX), EPA Method 602 <br /> Detection limits 0 3 µg/L BTE, and 0 6 pg/L X <br /> s� The detection limits quoted above are the minimum reportable levels specified by the <br /> analytical laboratory The presence of other hydrocarbons may raise the detection limits <br /> r' for particular constituents Refer to the laboratory data sheets in Appendix A for sample <br /> specific detection limits <br /> American Geological Services, Inc <br /> ' CA95DE-029 <br /> 5 <br />