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sample collected from MW-2 Benzene, xylene, MTBE, tertiary butanol, and 1AME were, detected In the groundwater sample collected from MW-2 (0 4, 1 5, 550, 72 and 3 6 p.gll, respectively) BTEX and FP14-G were not detected at or above the laboratory reported detection limit In the groundwater sample collected from MW-3 MT131, was detected in the groundwater sample collected from MW3 (7 9 4g/1) BTEX MTBE and I P11-G were detected In the, groundwater sample, collected from MW-44 (I 6 µg/l, 0 4 jig/] 2 0 4g/1, 22 µg/1 14 pg/I and 0 8 mg/l, respectively) Laboratory analytical results for the Septernber 18, 1997 sampling event are presented below In Table B 6 TABLE B 6 Groundwater Sample Analytical Results — September 18, 1997 ' a T E X Gasoline TPH-G TEPH Additives Oxygenates Kerosene Diesel Motor OSI Detection 0 3 0 3 0 3 0 6 1 0 005 0 05 0 05 0 5 1 ilnits µg/1 µg/l µg/1 ug/l µg/1 mg/1 tug/1 mg/1 mg/1 Sample I D MWI-9/18/97 ND ND ND ND ND ND ND ND ND MW2-9/18/97 0 4 ND 'SID 1 5 550(MTBE) ND ND ND ND 72(tertiary- butanol) 3 6(3 AMP)� MW3-9118/97 ND ND ND ND 7 9('MTBE) ISD ND ND ND M W4-9/18/97 1 6 0 4 2 0 22 14(MTBE) 008 ND ND ND Unit Conversions Anal teal }Ll,/kg parts per billion(ppb) BTEX benzene,toluene ethyl benzene and xylene eni, tg parts per million(ppm) TEPH total petroleum hydrocarbons quantified a kerosene,diesel and motor oil TPH G total petroleum hydrocarbons quantified as gasoline MT$h methyl Cert butyl ether TAMF tertiary amyl methy[ether I 14D none detected at or above laboratorydetection limits otht.r t,asolme addittvesloxygenatLs ND On December 31, 1997, Condor personnel were on site to conduct quarterly groundwater monitoring Laboratory I analyses of groundwater samples Indicated that BTEX, TPH-G, and the selected gasoline oxygenates/additives were not detected at or above the laboratory reported detection limits to the sample collected from MW-1 Ethanol, DIPS, and ETBE were not detected at or above the laboratory reported detection limits in any of the groundwater samples BTEX, TPH-G, and tertiary butanol were not detected at or above the laboratory reported detection limits In the sample collected from MW-3 MTBE and TAME were detected in the sample collected from MW-3 Low concentrations of BTEX constituents and TPH-G were detected in the samples collected from I MW-2 and MW-4 MTBE was detected in MW-4 MTBE, tertiary butanol, and LAME were detected In MW-2 No floating product, sheen, or petroleum hydrocarbon odor was noted in the monitor wells lull evaluation of intrinsic bioremediation parameters was not conducted because additional monitoring was necessary to evaluate the potential for Intrinsic bioremediation at the site • Groundwater elevation measurements collected at the site monitor wells on December 31, 1997, indicated that the average depth from the ground surface to groundwater was approximately 4 feet The average depth to water at the site decreased by approximately 2 feet between September 18, 1997 and December 31, 1997 Groundwater 1