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30 October 2003 <br /> . AGE-NC Project No 96-0232 <br />' Page 8 of 15 <br />' Zone hydrogeologic units as defined in AGE's Final Remediation Plan (Figures 4, 5, 6 and 7, <br /> respectively) <br />' On 15, 16 and 17 September 2003, approximately 5 to 10 gallons of ground water (a minimum of <br /> three casing-water volumes per well)were evacuated(purged)from wells MW-1 through MW-7 and <br /> MW-16 utilizing disposable polyethylene bailers, approximately 68 to 70 gallons of ground water <br /> were purged from wells EW-1 and EW-3 utilizing a two-stage submersible pump Temperature,pH <br /> and conductivity were measured for stabilization at regular purge-volume intervals from each well <br /> using an Oakton water analyzer Field data and logs are provided in Appendix G The purged ground <br />' water was transferred to the ground water remediation system holding tank for treatment and <br /> disposal <br />' Single-completion monitoring wells MW-14,MW-15,MW-17,MW-18 and multi-level monitoring <br /> wells MW-8 through MW-13 were purged utilizing a Watera-Hydro-Lift II pump equipped with a <br /> mechanical arm by lowering and raising a 3/8-inch outer diameter,length-discrete polyethylene hose <br />' equipped with a ball-valve water tip through the top chambers into the specific water-charged <br /> screened section Approximately 22'/4 to 30 gallons of ground water (a minimum of three casing- <br /> water volumes per well) were purged from the single-completion monitoring wells and <br /> approximately f4 to 4'/z gallons of groundwater were purged from the multi-level monitoring wells <br /> Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals <br /> from each well using an Oakton water analyzer Field data and logs are provided in Appendix G <br /> purged ground water was transferred to the ground water remediation system holding tank for <br /> treatment and disposal <br /> 3 2 GROUND WATER SAMPLING <br /> Ground water samples were collected from the purged wells MW-1 through MW-7,MW-16,EW-1 <br /> and EW-3 utilizing new, 2-inch diameter disposable polyethylene bailers, ground water samples <br /> were collected from the purged wells MW-8 through MW-15,MW-17 and MW-18 utilizing%-inch <br /> diameter polyethylene tubing Ground water samples were transferred into one-liter amber bottles <br /> without a preservative and into 40-m1 EPA-approved volatile organic analysis (VOA) vials <br /> containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was taken to ensure that <br /> visible air bubbles were not present in the vials after filling and capping Ground water sample <br /> containers were labeled with the well designation, date, time, and sampler's initials <br /> Ground water samples were collected at sampling ports located near the tops of extraction wells <br /> EW-2 and EW-4 through EW-10, each extraction well was allowed to be operational for at least <br /> 30 minutes prior to collecting samples directly into the sample containers <br /> I <br /> Advanced GeoEnvironmentai,Inc <br /> 1 <br />