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within 0.01 feet. Each well was then purged with a submersible pump until a minimum <br /> of three casing volumes of water had been removed and temperature, pH, and electrical <br /> conductivity had stabilized to within 10% of the previous readings. This insured that <br /> formation waters were drawn into each well. All measured parameters were recorded on <br /> the appropriate field logs and are presented in Appendix B. Table 1 summarizes the field <br /> logs for the measured parameters. <br /> ' TABLE 1 <br /> Summary of Monitoring Well Field Logs <br /> Volume Temp pH Conductivity <br /> Well Date purged (OC) units (µSlcm) Turbidity ' <br /> (gallons} <br /> ' 0.5 17.0 7.40 1470 High <br /> MW-1A 03/16/99 1.5 17.1 7.48 1440 Low <br /> 3.0 17.2 7.47 1440 Low <br /> 4.5 17.3 7.47 1440 Low <br /> 0.5 16.4 7.09 2160 High <br /> MW-6 03/16/99 1.5 16.0 7.30 2000 Low <br /> 3.0 15.9 7.45 1750 Low <br /> 4.5 159 7.39 1680 Low <br /> lie 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 /> 1 After purging, sampling of each well was conducted using new, clean, dedicated <br /> disposable polyethylene bailers. The bailers were lowered into the wells via new <br /> ' dedicated poly cords, samples collected, and gently poured into four laboratory provided <br /> clean glass VOA vials. Each VOA vial was immediately sealed, checked for headspace, <br /> labeled with the date, time and location and placed in a cooler containing blue ice at 4° <br /> 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 one hour from their time of collection. Appendix A contains <br /> analytical data, chain-of-custody and QA/QC data. Table 2 summarizes the analytical <br /> American Geological Services, Inc. <br /> CA95Dr-029 <br /> 6 <br />