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' 29 March 2001 <br /> • AGE-NC Protect No 97-0249 <br /> IPage 2 of 6 <br /> Isite 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 the purged wells utilizing new, disposable polyethylene bailers, one <br /> 1-liter amber bottle without a sample preservative and four 40-m1 EPA-approved VOA vials <br /> I 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 Ground water sample <br /> containers were labeled with the well designation, date, time, and sampler's initials <br /> I <br /> 2 3 DOMESTIC WATER WELL SAMPLING <br /> Ground water sample collection from domestic water wells located at Rocky's Restaurant(RDW-1) <br /> I and Three B's Truck Plaza(DW-1) were achieved by opening a valve from the outlet sample port <br /> and allowing the pump to turn on and run for a mimmum 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 one 1-liter amber bottle without a sample preservative and three 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 /> 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 /> • Volatile aromatic compounds - benzene, toluene, ethyl benzene and xylene (BTEX) with <br /> methyl-tertiary butyl ether (MTBE) by EPA Method 8020, and <br /> • Fuel oxygenated compounds -methanol, ethanol, tertiary butanol (TBA), di-isopropyl ether <br /> (DIPE), ethyl tert butyl ether(ETBE), tert amyl methyl ether(TAME) and MTBE by EPA <br /> . Method 8260 Modified <br /> Advanced GeoEnviron mental,Inc <br />