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i <br /> i <br /> ICanteen Facility January 11, 2002 <br /> QuAijorly Groundwater Monitoring Re ort Page 2 <br /> I <br /> • Sampled and analyzed groundwater for <br /> I • total petroleum hydrocarbons, gasoline range (TPHg) (method 8015 modified), <br /> • benzene, toluene, ethylbenzene, and xylenes (BTEX) (method 8020), and <br /> • gasoIine 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-dtchloroethane (1,2-DCA), and ethylene dfbromide (EDB) (method 8260B) <br /> • Prepared this 2001 Fourth Quarterly Monitoring Report summarizing the findings of the <br /> quarterly activities <br /> This report presents field observations, results, conclusions and recommendations for additional <br /> work, if necessary AES has prepared this report in accordance with generally accepted <br />' environmental practice <br /> SITE INVESTIGATION & RESULTS <br /> MONITOR WELL SAMPLING <br /> IUpon arrival at the Site, the well caps were opened to allow the wells to achieve static conditions <br /> 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 representative formation groundwater Groundwater samples were collected <br />' from the seventeen monitor wells on November 8, 2001 <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 detected in monitor wells <br /> MW-3D and MW-13 <br /> IAfter purging, samples were collected using pre-cleaned disposable bailers and then transferred to <br /> 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 using an <br /> overnight delivery service to McCampbell Analytical, Inc , of Pacheco, California, a California <br /> accredited analytical laboratory <br /> 0 <br /> I �LfCES� <br />