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• <br /> Former Canteen Facility April 4,2002 <br /> Quarterly Groundwater Monitoring Report Page 2 <br /> • Sampled and analyzed groundwater for the following parameters <br /> • total petroleum hydrocarbons, gasoline range(TPHg) (method 8015 modified), <br /> • benzene, toluene, ethylbenzene, and xylenes(BTEX) (method 8020), and <br /> • gasoline oxygenates including t-Butanol (TBA), Methyl-t-Butyl Ether (MTBE), Di- <br /> isopropyl Ether (RIPE), Ethyl-t-Butyl Ether (ETBE), t-Amyl Methyl Ether (TAME), <br /> 1,2-dichloroethane (1,2-DCA), and ethylene dibromide (EDB) (method 8260B) <br /> • Prepared this 2002 First Quarterly Monitoring Report summarizing the findings of the <br /> quarterly activities <br /> IThis report presents field observations, results, conclusions and recommendations for additional <br /> work, if necessary AES-RS has prepared this report in accordance with generally accepted <br /> Ienvironmental practice <br /> SITE INVESTIGATION & RESULTS <br />�. MONITOR WELL SAMPLING <br /> Upon arrival at the Site, the well caps were opened to allow the wells to achieve static <br /> conditions The wells were then gauged to measure groundwater elevations (Table 1) and purged <br /> with a submersible Grundfos® pump or disposable bailer until three casing volumes of <br /> Igroundwater had been recovered Field measurements for conductivity, pH and temperature <br /> were taken dunng purging to ensure the collection of representative formation groundwater <br /> Groundwater samples were collected from the seventeen monitor wells on February 7, 2002 F <br /> During purging of the monitor wells, neither non-aqueous phase liquid (NAPL) nor hydrocarbon <br /> I sheen were noted on the purged groundwater Gasoline odors were not detected in any of the <br /> monitor wells <br /> After purging, samples were collected using pre-cleaned disposable bailers and then transferred <br /> to laboratory provided containers for analysis of TPH(g), BTEX, TBA, MTBE, DIPE, ETRE, <br /> TAME, 1,2-DCA and EDB The samples were transported under chain-of-custody using an <br /> overnight delivery service to McCampbell Analytical, Inc , of Pacheco, California, a California <br /> accredited analytical laboratory <br /> IGROUNDWATER CONDITIONS <br /> . The following summarizes the local groundwater gradient and the groundwater analytical results <br /> JFJGUtdl, <br /> I4�17CE5 <br />