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The pump, hose, and electrical leads were decontaminated before and between each well <br /> purging by washing the exterior with a solution of laboratory grade detergent The pump <br /> ' was flushed by pumping the solution through the pump and hose The exterior of the <br /> pump, hose, and electrical leads were then rinsed with potable water Potable water was <br /> pumped through the pump and hose The pump was then rinsed with potable water <br /> ' After purging, sampling of each well was conducted using new, clean, dedicated <br /> disposable polyethylene bailers Distilled water was poured into the bailer used for each <br /> ' well and a bailer blank was collected prior to well sampling The bailers were then <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 4° 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 six' 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 June 19, 1996 sampling event <br /> ' Analytical results from previous sampling events are presented in Table 3 <br /> M 5.0 GROUNDWATER ANALYTICAL C L RESULTS <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 /> 1 . Total Petroleum Hydrocarbons (TPH) - Gasoline, Method 5030/LUFT <br /> Detection limit 0 05 mg/L <br /> ' a Benzene, Toluene, Ethyl benzene, Xylenes (BTEX), and MTBE, EPA Method 602 <br /> Detection limits 0 3 µg/L BTE, 0 6 µg/L X, and 10 µg/l, MTBE <br /> ' 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 /> 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 /> 6 <br />