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<br /> CES��
<br /> Former Canteen Facility January 14,2003
<br /> Qgarterly Groundwater Monitoring Report Pa e 2
<br /> • Purged each Site monitor well, except MW--13, (MW-1, MW-2, MW-3, MW-3A, MW-3D,
<br /> MW-4 through MW-12, MW-13A, and MW-13B) by removing a minimum of three well
<br /> volumes using a submersible purge pump or disposable bailer
<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), 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) (method 8260B)
<br /> • Prepared this 2003 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-RS has prepared this report in accordance with generally accepted
<br /> environmental 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 sixteen monitor wells (MW-1, MW-2,
<br /> MW-3, MW-3A, MW-3D, MW-4 through MW-12, MW-13A, and MW-13B) on November 20,
<br /> 2003 Monitor well MW-13 was not sampled during this event because gauging indicated it was
<br /> dry
<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-3 and MW-3A
<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
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