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4 <br /> least 20 gallons pumped through the pump' and hose. The pump was then rinsed with <br /> ' distilled 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 MW-1 <br /> and a bailer blank was collected prior to well sampling. The bailers were then lowered <br /> into the wells via new dedicated poly cords, samples collected, and gently poured.into two . <br /> Iaboratory provided clean glass VOA vials, . Each VOA vial was immediately sealed, <br /> Lchecked for headspace, labeled with the date, time and location and placed in a cooler <br /> containing blue ice at 4° Celsius. One plastic liter bottle was collected from each of the <br /> monitoring wells for the analysis of dissolved metals. These samples were also labeled <br /> with the date, time and location and 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 four hours from their time of collection. Appendix A contains <br /> analytical data and chain-of-custody forms. Table 2 summarizes the analytical results from <br /> the monitoring well samples for the June 22, 1995 sampling event. Analytical results from <br /> previous sampling events are presented in Table 3. <br /> 5.0 GROUNDWATER ANALYTICAL RESULTS <br /> 5.1 Laboratory Analysis of Ground Water Samples <br /> 1 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 pg/L. <br /> Benzene, Toluene, Ethyl benzene, and Xylenes (BTEX), EPA Method 602 <br /> Detection limits 0.3 pg/L BTE, and 0.6 pg/L X. <br /> • Dissolved Chromium, Method 7191 <br /> Detection limit: 0.01 mg/L <br /> s • Dissolved lead, Method 7421 <br /> Detection limit: 0.01 mg/L <br /> American Geological Services,Inc. <br /> CA95DE-029 <br /> � - 5 <br /> �i • <br />