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11 June 2002 <br /> AGE-NC Project No 96-0249 <br /> IPage 2 of 6 <br /> I are in Appendix B Purged ground water was containenzed in 55-gallon drums and was stored on- <br /> site in an area lacking general public access <br /> 2 2 GROUND WATER SAMPLING <br /> Following well purging, ground water levels from each well achieved a minimum of 80 percent <br /> recharge prior to sample collection Ground water samples were collected from the purged wells <br /> utilizing new, disposable polyethylene bailers, and transferred to 40-m1 EPA-approved VOA vials <br /> containing 0 5 ml 18%hydrochloric acid as a sample preservative and 1-liter amber bottles without <br /> preservative Care was taken to ensure that visible air bubbles were not present in the vials after <br /> filling and capping Ground water sample containers were Iabeled with the well designation, date, <br /> time, and sampler's initials <br /> I23 DOMESTIC WATER WELL SAMPLING <br /> A ground water sample was collected from domestic water well DW-1 by opening a valve from the <br /> outlet sample port and allowing the pump to turn on and run for a minimum of 15 minutes, to purge <br /> the domestic well prior to sample collection Grab water samples were collected from the purged <br /> domestic well utilizing a 1-liter amber bottles without a sample preservative and 40-m1 EPA- <br /> approved VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was <br /> taken to ensure that visible air bubbles were not present in the vials after filling and capping Ground <br /> water sample containers were labeled with the well designation, date, time, and sampler's initials <br /> 2 4 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> i <br /> Each ground water sample was logged on a chain-of-custody form, placed in a chilled container and <br /> I transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively)by EPA Methods 5030/8015 Modified and 3550/8015 Modified, respectively, <br /> • Benzene,toluene, ethyl benzene and xylene (BTEX) and methyl-tertiary butyl ether(MTBE) <br /> by EPA Method 8020, and <br /> • Methanol, ethanol, tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether <br /> (ETBE), tert amyl methyl ether(TAME) and MTBE by EPA Method 8260 Modified <br /> Advanced GeoEnvironmental,Inc <br />