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5alnplf. Lalle,c.ted from VW-2 Benzene rvlene V11 BI tertiary butanol, and CAME were detected in the groundwater sample collected trom MW--2 (0 4, 1 5 550 72 and 3 6 ug/l, respectively) BTEX and FPH-(., were not detected at or above Ihc, laboratory reported detection limit in the groundwater samplL LolleLted from MW-3 MTBE was d0ected in the groundwater sample collected from V1W3 (7 9 µg/l) BTEX, M IBE and TPII-G were detected In the groundwatt,r sample L011eLted from MW-4 (1 6 4g1l, 0 1 µg/l, 2 0 µg/l, 22 µg/1 14 )_ig/l and 0 8 mg/l, respectively) 1 aboratory analytlLal results for the September 18, 1997 sampling event are presented below in Table 13 6 TABLE B 6 Groundwater Sample Analytical Results— September 18, 1997 B f F X Gasoline TPH-G TEPH Additives Oxygenates Kerosene Diesel Motor Oil Detection 03 0 3 0 3 0 6 1 0 0 05 005 005 0 5 Limits µg/1 ug/I µg/l 4g/1 µg/l mg/i mg/I mgA ing/I Sample I D MW 1-9/18/97 ND ND SID ND ND ND ND ND ND ' MW2-9/18/97 0 4 'ND ND 1 5 550(MTBP) ND ND ND ND 72(tertiary- butanol) tertiary- hutanol) 3 6(TAME) MW39/18/97 \D LD SID ND 79(M1BE) ND till ND ND MW4-9/18/97 1 6 0 4 2 U 22 14(MTBIs) 0 08 ND ND ND Lnit C0nVLtSi0n9 Aird cal pykl, pates pet bdhon(ppb) BTEX benzene toluene ethyl benzene and xylene mg/kg parts per mrilron(ppm) TEPH total petroleum hydrocarbons,quantified as kcrosertc diesel and motor oil TPH G total petroleum hydrocarbons quantified as yasohni. MTBE methyl tert butyl ether TAME tuuary amyl methyl ether ND none detected at or above laboratory detection limits other l,asolme addtttves/oxygctiates ND On December 31, 1997, Condor personnel were on site to conduct quarterly groundwater monitoring Laboratory analyses of groundwater samples indicated that BTEX, TPII-G, and the selected gasoline oxygenates/additives were not detected at or above the laboratory reported detection limits in 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 MW-2 and MW-4 MTBE was detected in MW-4 MTBE, tertiary butanol, and TAME were detected in MW-2 No floating product, sheen, or petroleum hydrocarbon odor was noted in the monitor wells Full evaluation of intrinsic bioremediation parameters was not conducted because additional monitoring, possibly for one year, is necessary to evaluate the potential for intrinsic bioremedtation at the site • Groundwater elevation measurements collected at the site on December 31, 1997, indicated that the average depth to groundwater was approximately 4 feet bgs The average depth to water at the site decreased by ' approximately 2 feet between September 18, 1997 and December 31, 1997 Groundwater elevation contours