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I 01 October 2004 AGE-NC Project No 95-0130 Page 2 of 6 I could not be recovered from wells MW-6A and MW-7A and the monitoring locations were subsequently reported as `dry' The groundwater elevation at wells MWA through MW-8,VW-1C, VW-2A and VW-3A were calculated by subtracting the measured depth to ground water from the surveyed casing elevation As-built monitoring well construction details are summarized in Table 1 Ground water elevations were plotted and contoured on scaled site maps depicting First Zone and Second Zone ground water elevations (Figures 3 and 4) After water levels were measured, approximately 0 25 to 18 gallons of ground water (a mimmum of three casing-water volumes per well) were purged from wells MW-1 through MW-8, VW-1C, VW-2A and VW-3A by lowering and raising a 318-inch outer diameter,length-discrete polyethylene hose equipped with a ball-valve water tip through the specific water-charged screened section A Watera-Hydro-Lift II pump equipped with a mechanical arm was utilized to surge the polyethylene hose Temperature, pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using the Oakton water analyzer Field data and logs are in Appendix B Multi-level well purged ground water was transferred to 55-gallon drums and stored on-site in an area lacking general public access Due to discrepancies with previous analytical monitoring data, well MW-6E was re-sampled on 19 lie February 2004 utilizing the above mentioned Watera-Hydro-Lift II pump equipped with a mechanical arm and polyethylene hose After the water level was measured, approximately 1 25 gallons of ground water (a minimum of three casing-water volumes per well) were purged from multi-level well MW-6E Temperature, pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using the Oakton water analyzer Field data and logs are in Appendix B 2 2 GROUND WATER SAMPLING Ground water samples were collected from wells MW-1 through MW-8, VW-1C, VW-2A and VW-3A utilizing 318-Inch diameter polyethylene tubing and poured directly into the 40-m1 EPA- approved volatile organic analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid as a sample preservative Care was taken to ensure that visible air bubbles were not present in the vials after filling and capping Ground water sample containers were labeled with the well designation, date, time, and sampler's Initials Advanced GeoEnvi ron mental,Inc