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07 November 2002 <br /> AGE-NC Project No 96-0263 <br /> Page 3 of 6 <br /> Ivisually sediment free, approximately 20 gallons of water were removed from wells OWI and EWl <br /> Purged ground water was containerized in properly labeled DOT-approved model 17H 55-gallon <br /> drums and were stored on-site Field sheets and data are included in Appendix B <br />' 2 6 WELL MONITORING AND EVACUATION <br /> On 28 June 2002, a Sohnst water level meter was used to measure the depth to ground water in <br />' eleven monitoring wells (MW I through MW 11) relative to the tops of the well casings The ground <br /> water elevations and gradient were determined from these data (Table 1) <br />' After recording water level measurements, disposable plastic bailers were used to purge the wells <br /> of standing water Approximately 6 gallons of water (a min3znum of 3 casing-water volumes per <br /> well) were removed from wells MWI, MW2, MW3, MW7, MW9, MW10 and MW11 Monitoring <br />' well MW6 was purged of approximately 13 gallons of water and approximately 3, 4 and 2 5 gallons <br /> of water were removed from wells MW4, MW5 and MW8, respectively before the wells were bailed <br /> dry Ground water temperature, pH and conductivity were measured at regular intervals during <br />' purging using an Oakton water analyzer Field sheets and data are included in Appendix C Purged <br /> water was stored on-site in labeled,55-gallon Department ofTransportation(DOT)-approved drums <br />' 27 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' Water samples were collected from the purged wells using new disposable plastic bailers after <br /> allowing the wells to achieve a mini num 80%recovery of the pre-purge water volume Each water <br />' sample was transferred into three 40-m1 VOA vials containing 0 5 mil I8% hydrochloric acid as a <br /> sample preservative After collection, the samples were properly labeled, placed in a chilled <br /> container and transported under chain-of-custody to CTEL The samples were analyzed for <br />' TPH-g in accordance with EPA Method 8015 Modified, <br /> • BTEX in accordance with EPA Method 8260, and <br />' 0 MTBE, DIPS, ETBE, TAME, TBA, EDB and 1,2-DCA in accordance with EPA Method <br /> 8260 Modified <br />' 3.0 FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br />' 28 June 2002, the contaminant impact to soil and ground water was quantified from the laboratory <br /> analytical data <br /> 1 <br />