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rCE51� <br /> • Sampled and analyzed groundwater for <br /> • total petroleum hydrocarbons, gasoline range (TPHg), <br /> 1 • benzene, toluene, ethylbenzene, and xylenes (BTEX), and <br /> • gasoline oxygenates including t-Butanol (TBA), Methyl-t-Butyl Ether (MTBE), Di- <br /> isopropyl Ether (DIPE), Ethyl-t-Butyl Ether (ETBE), t-Amyl Methyl Ether (TAME), <br /> ' 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) <br /> 1 • Prepared this 2001 First Quarterly Monitoring Report summarizing the findings of the <br /> quarterly activities <br /> This report presents field observations, results, conclusions and recommendations for additional <br /> 1 work AES has prepared this report in accordance with generally accepted environmental <br /> practice <br /> 1 SITE INVESTIGATION & RESULTS <br /> 1 The procedures, field notes, and laboratory reports submitted by AGE for this quarterly <br /> monitoring event are attached as Appendix A <br /> MONITOR WELL SAMPLING <br /> Upon arrival at the Site, the well caps were opened to allow the wells to achieve static conditions <br /> 1 The wells were then gauged to measure groundwater elevations (Table 1) and purged with a <br /> submersible Grundfos® pump until three casing volumes of groundwater had been recovered <br /> Field measurements for conductivity, pH and temperature were taken during purging to ensure <br /> the collection of formation groundwater Groundwater samples were collected by AGE from the <br /> seventeen monitor wells on March 6 and 7, 2001 <br /> 1 During purging of the monitor wells, neither non-aqueous phase liquid (NAPL) nor hydrocarbon <br /> sheen were noted on the purged groundwater Gasoline odors were detected in monitor wells <br />' MW-1, MW-5 and MW-13 <br /> After purging, samples were collected using pre-cleaned disposable bailers and then transferred to <br /> 1 laboratory provided containers for analysis of TPH(g), BTEX, TBA, MTBE, DIPE, ETBE, <br /> TAME, 1,2-DCA and EDB The samples were transported under chain-of-custody to <br /> McCampbell Analytical, Inc , of Pacheco, California, a California accredited analytical laboratory <br /> 1 <br /> 1 <br /> Canteen Facility April 13, 2001 <br /> Quarterly Groundwater Monitoring Report Page 2 <br />