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I V, V <br /> Former Canteen Facility July 1,2004 <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 8021B), and <br /> • gasoline oxygenates including t-Butanol (TBA), Methyl-t-Butyl Ether (MTBE), D1- <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) (method 826013) <br /> • Preparation of the 2004 Second Quarterly Monitoring Report summarizing the findings <br /> of the quarterly activities <br /> fThis report presents field observations, results, conclusions and recommendations for additional <br /> work, if necessary In addition, a review of the on-site systems operation and maintenance is <br />' presented AES has prepared this report in accordance with generally accepted environmental <br /> 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 Each well was then gauged to measure groundwater elevations (Table 1) and <br />' selected wells were purged with a Waterra® pump or disposable bailer until three casing <br /> volumes of groundwater had been recovered Field measurements for conductivity, pH and <br /> temperature were taken during purging to ensure the collection of representative formation <br />' groundwater Groundwater samples were collected from seven monitor wells (MW-3, MW-3A, <br /> MW-3D,MW-11, MW-13,MW-13A, and MW-13B) on February 24, 2004 <br />' During purging of the monitor wells, neither non-aqueous phase liquid (NAPL) nor hydrocarbon <br /> sheen were noted on the purged groundwater A gasoline odor was detected in monitor wells <br /> MW-13 and MW-13A <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, ETBE, <br />' TAME, 1,2-DCA and EDB The samples were transported under chain-of-custody using an <br /> overnight delivery service to Columbia Analytical Services, Inc , of Phoenix, Arizona, a <br /> California accredited analytical laboratory <br /> t <br />