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' 17 rune 2003 <br /> AGE-NC Project No 95-0121 <br /> Page 2 of 5 <br /> polyethylene disposable bailers Temperature,pH and conductivity were measured for stabilization <br /> at regular purge-volume intervals from each well using an Oakton water analyzer Field data and logs <br /> are included with Appendix B Purged ground water was containerized in 55-gallon drums and was <br />' stored on-site in an area lacking general public access <br />' 2 2 GROUND WATER SAMPLING <br /> Following well purging,ground water levels at all wells achieved a minimum of 80 percent recharge <br />' prior to sample collection Ground water samples were collected from the purged wells utilizing <br /> new, disposable polyethylene bailers and transferred into 1-liter amber bottles without sample <br /> preservative and 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a <br />' sample preservative Care was taken to ensure that visible air bubbles were not present in the vials <br /> after filling and capping Ground water sample containers were labeled with the well designation, <br />' date, time, and sampler's initials <br /> 2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Following collection and labeling,each groundwater samplewas logged on a chain-of-custody form, <br /> 1 placed in a chilled container and transported to McCampbell Analytical, Inc , a California <br /> Department of Health Services (DHS)-certified laboratory, for analysis for <br />' • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) by EPA Methods 8015C15030B/3510C, <br /> • Benzene, toluene, ethyl benzene and xylene (BTEX) by EPA Method 8021B, and <br />' Di-isopropyl ether(DIPE),ethyl tert butyl ether(ETBE),methyl tert butyl ether(MTBE),tert <br /> amyl methyl ether(TAME) and tertiary butanol (TBA) by EPA Method 8250B <br /> 1 <br /> 3.0. FINDINGS <br /> Ground water elevation,flow direction and gradient were determined from field data collected on 07 <br />' March 2003 The contaminant impact to groundwater was quantified by the groundwater laboratory <br /> data <br /> 1 , Advanced GeoEnwronmeatal,Inc <br /> 1 <br />