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In accordance with the work plan, Condor conducted an additional soil and groundwater investigation on September 10, 15 and 18, 1997, at the site Four monitor wells were drilled, installed, developed, surveyed, and ,,ampled as part of the investigation The Report - Additional Soil and Groundwater Investigation, dated December l 1 1997, was prepared by Condor describing the Investigation results Laboratory analysis of the soil samples indicated that total petroleum hydrocarbons quantified as kerosene, ' diesel, and motor oil ("I EPH), ethanol, tertiary butanol, DIPE, ETBE and (TAME) were not detected at or above the laboratory reported detection limits in any of the samples collected from the monitoring wells during the September 1997, sampling event BTEX, TPH-G, and MTBE were not detected at or above the laboratory ' reported detection limits in the soil Sample collected from MW-1 at a depth of six feet bgs BenTene, ethyl benzene and xylene were not detected at or above the laboratory reported detection limits in the soil sample collected from MW-2 at a depth cit four feet bgs Toluene, TPH-G and MTBE were detected in the soil sample ' collected from MW-2 at a depth of four feet bgs (16 µg/kg, 1 2 mg/kg and 1,300 µg/kg, respectively) Benzene and toluene were not detected at or above the raised laboratory reported detection limit in the soil sample collected from MW-4 at a depth of six feet bgs MTBE was not detected at or above the laboratory reported detection limit in the sample collected from MW-4 at a depth of six feet Ethyl benzene, xylene and TPH-G were detected In the soil sample collected from MW-4 at a depth of six feet (680 µgfkg, 6,000 µ./kg, and 28 mg/kg, respectively) A summary of the laboratory analytical results of the soil samples are presented below in Table BS TABLE B.5 Soil Sample Analytical Results B T E X TPH-G Gasoline TEPH Oxygenates/ Additives Kerosene Diesel Motor Oil ' Dett,ctlon 5 0 5 0 5 0 50 1 0 100 1 0 1 0 100 I imlts }tgAg Mg/kg µg/kg µg/kg mg/kg pg/kg mg/kg mg/kg mg/kg Sample ' I M W 1-6 ND ND ND ND ND ND ND ND ND MW2-4 ND 16 ND ND 12 1300 ND ND ND (MTB ) ** N4W4-6 Nr) 100* ND 100* 680 6,000 28 ND ND ND ND ' ihutl.onversrons Anal cal µ6A6 parts per billion(ppb) BTEX=benzene toluene ethyl benzene and xylene ' ink,/kg parts per million(ppm) TFf H—total petroleum hydrocarbons,quantified as kcroscne diesel and motor oil TPH(7 total petroleum hydimearbons,quantified as basolme MTBE methyl ternary butyl ether V11 none detected at or above laboratory detection limits ND X* none detected to a level of X ki A other gasoline additives/oxygenates were not detected at or above the laboratory reported detection limits Laboratory analysis of the groundwater samples Indicated total petroleum hydrocarbons quantified as kerosene, diesel, and motor oil (TEPH), ethanol, DIPE and ETBE were not detected at or above the laboratory reported detection limits in any of the groundwater samples collected from the monitoring wells during the September, 1997, sampling event BTEX, the selected gasoline oxygenates/additives and TPH-G were not detected at or above the laboratory reported detection limits in the groundwater sample collected from MW-1 Toluene, ethyl benzene, and TPH-G were not detected at or above the laboratory reported detection limits in the groundwater