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I I 07 March 2003 ' AGE-NC Project No 95-0141 Page 4 of 10 ' Apprcximately 4 5 to 6 5 gallons of water were removed from wells MW-9A,MW-I OA,MW-11 A and MW-12A and approximately 16 to 28 gallons of water were removed from wells MW-8B, MW-9B, MW-10B, MW-I IB and MW-12B Purged ground water was containerized in properly labeled DOT-approved model 17H 55-gallon drums and was stored on-site Field sheets and data are included in Appendix D 2 3 MONITORING WELL ABANDONMENT On 22 and 23 October 2002 monitoring wells MW-1,MW-2 and MW-4 were abandoned by Cascade Drilling,utilizing 8 25-inch diameter hollow stem augers to drill out wells MW-1,MW-2 and MW-4 to their total depths Subsequently,each borehole was completely backfilled with a portland cement grout mixture to one to two feet below surface grade, a ratio of six gallons of water for every 94-pound sack of portland cement was utilized in preparation of the grout mixture The remaining Iareas were backfilled to surface with neat cement lie2 4 QUARTERLY WELL MONITORING On 28 October 2002, the fourth quarter ground water monitoring event was conducted at the site, Ififteen wells were monitored and sampled I2 4 1 Well Monitoring and Evacuation A Solinst water level meter was used to measure the depth to ground water in wells MW-3,MW-5, I MW-6, MW-7, MW-8A/13 through MW-12A/B and EX-1 relative to the tops of the well casings, the ground water elevations and gradient were determined from these data(Table 1) After the depth- to-ground-water measurements, a minimum of 3 casing-water volumes of water was purged from each well using dedicated,disposable plastic bailers to purge wells MW-3,MW-5,MW-7 and MW- 8A through MW-12A and a Watera Hydro-Lift 11pump to purge the remaining wells Approximately 4 to 14 gallons of water were removed from wells MW-3, MW-5, MW-6, MW-7, and MW-8A through MW-12A,and approximately 21 gallons ofwater were removed from wells MW-8B through MW-12B I Temperature,pH and conductivity of purged ground water were measured at regular purge intervals using an Oakton water analyzer The field data and field sheets are included in Appendix E Purged water was temporarily stored on-sate in 55-gallon DOT-approved H-17 storage drums pending proper Idisposal I Advanced GeoEn"ronmental,Inc I