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' 31 May 2005 <br /> • AGE-NC Project No 04-1239 <br />' Page 3 of 7 <br />' well development field logs are provided in Appendix C <br />' 2 2' QUARTERLY WELL MONITORING <br /> The initial quarterly ground water monitoring event was performed on 11 April 2005,ground water <br />' monitoring was performed on monitoring wells MW-9 through MW-11 <br />' 2 2 1 Well Monitoring and Evacuation <br /> The depths to ground water in monitoring wells MW-9 through MW-11 were measured from the <br />' tops of the well casings to the nearest 0 01-foot utilizing a Solmst water level meter Ground water <br /> elevation in each well was calculated by subtracting the measured depth to ground water from the <br /> surveyed casing elevation(Table 1) <br /> After water levels were measured approximately 9 0 to 11 0 gallons of water a minimum of three <br /> PP Y g ( <br /> casing water volumes per well) were purged from wells MW-9 through MW-11 using a Waterra <br /> inertia pump and dedicated tubing Ground water temperature,pH,and conductivity were measured <br /> at regular intervals during purging using an Oakton water analyzer Field sheets and data are included <br /> in Appendix D Purged water was stored on-site in properly labeled, DOT-approved 55-gallon <br /> drums <br /> ' 2 2 2 Collection and Analysis of Ground Water Samples <br /> Y P <br /> Ground water samples were collected from each well using disposable plastic bailers after allowing <br /> the wells to achieve a minimum 80% recovery of the pre-purge water volume Each water sample <br /> was transferred into three laboratory-supplied, 40-milliliter (ml) volatile organic analysis (VOA) <br /> vials containing 0 5 ml 18% hydrochloric acid solution as a sample preservative, and one 1-liter <br /> amber bottle without preservative After collection, the samples were properly labeled,placed in a <br /> chilled container, and transported under chain of custody to CTEL for analysis The samples were <br /> analyzed for <br /> • TPH-g in accordance with EPA Method 8015M, and <br /> • BTEX and fuel oxygenates DIPS, ETBE, MTBE, TAME, TBA, 1,2-DCA, and EDB in <br /> accordance with EPA Method 8260B <br /> Advanced GeoEnvnronmental,Inc <br />