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i TABLE 1 Summary of Monitoring Well Field Logs ' Volume Temp pH Conductivity ' Well Date purged (oF) units (µS/cm) Turbidity (gallons) 1.0 68.9 7.15 2150 High ' MW-1A 06/15/99 2.0 67.5 7.25 2010 Low 4.0 66.9 7.26 2010 Low 6.0 66.9 7.24 2020 Low ' 1.0 69.4 7.02 2330 High MW-6 06/15/99 2.0 64.9 6.93 2100 Low 4.0 63.3 7.37 2150 Low 6.0 63.1 7.35 2080 Low 1.0 68.5 7.29 1550 Low MW-5 06/22/99 2.0 63.9 7.49 1400 Low 4.0 61.3 7.55 1380 Low 6.0 60.5 7.57 1360 Low 1.0 75.0 7.26 2320 High MW-7 06/22/99 3.0 69.6 7.35 2350 Moderate 6.0 68.1 7.33 2330 Low 9.0 67.7 7.33 2290 Low 1.0 72.5 7.22 2330 Low • 6.0 67.1 7.28 2200 Low MW-9 06/22/99 ' 12.0 67.2 7.27 2190 Low 18.0 1 67.0 7.26 2190 Low The pumps, hoses, and electrical leads were decontaminated before and between each well purging by washing the exteriors with a solution of laboratory grade detergent. The ' pumps were flushed by pumping the solution through the pump and hose. The exterior of the pump, hose, and electrical leads were then rinsed with potable water. Potable water ' was pumped through the pump and hose. The pump was then rinsed with potable water. After purging, sampling of each well was conducted using new, clean, dedicated ' disposable polyethylene bailers. The bailers were lowered into the wells via new dedicated poly cords, samples collected, and gently poured into laboratory provided clean glass VOA vials. Each VOA vial was immediately sealed, checked for headspace, ' labeled with the date, time and location and placed in a cooler containing blue ice at 4° Celsius. Disposable Nitrile gloves were worn during purging and sampling, and were changed between wells. ' The domestic water supply wells were sampled after running their dedicated submersible pumps for several minutes to purge the wells. Samples were collected at sampling ports ' installed at the well heads by filling laboratory VOA vials as described above. American Geological Service, Inc. ' CA95DE-029 7