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i <br />' 04 March 2002 <br /> . AGE-NC Project No 96-0249 <br />' Page 2of6 <br /> data and logs are in Appendix B Purged groundwater was containerized in 55-gallon drums and was <br />' stored on-site in an area lacking general public access <br />' 2 2 GROUND WATER MONITORING WELL SAMPLING <br />' Following well purging, ground water levels in monitoring wells MW-1 through MW-6 were <br /> allowed to achieve a minimum of 80 percent recharge prior to sample collection Ground water <br /> samples were collected from each purged well utilizing a new, disposable polyethylene bailer, one <br />' 1-liter amber bottle without a sample preservative and three 40-m1 EPA-approved VOA vials <br /> containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was taken to ensure that <br /> visible air bubbles were not present in the vials after filling and capping The ground water sample <br />' containers were labeled with the well designation, date, time, and sampler's initials <br /> 2 3 DOMESTIC WATER WELL SAMPLING <br /> Ground water sample collection from domestic water wells located at Rocky's Restaurant(RDW-1) <br />�. and Three B's Truck Plaza(DW-1)was achieved by opening a valve from the outlet sample port and <br /> allowing the pump to turn on and run for a minimum of 15 minutes to purge the domestic water <br /> wells prior to sample collection Grab water samples were collected from the purged domestic water <br /> wells utilizing 1-liter amber bottles without a sample preservative and 40-ml EPA-approved VOA <br /> vials containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was taken to ensure <br /> that visible air bubbles were not present in the vials after filling and capping Ground water sample <br /> containers were labeled with the well designation, date, time, and sampler's initials <br /> 2 4 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each ground water sample was logged on a chain-of-custody form,placed in a chilled container and <br /> 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)with fuel oxygenated compound methyl- <br /> tertiary butyl ether(MTBE) by EPA Method 8020, and <br /> L • 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 GcoEnvironmentni,Inc <br /> 1 <br />