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In accordance with the work pian, 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 sampled as part of the Investigation The Report - Additional Sod and Groundwater Investigation dated December 11, 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 (TEPH), ethanol, tertiary butanol, DIPS, ETBE and (TAME) were not detected at or above I 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 soli sample collected from MW-1 at a depth of six feet bgs Benzene, ethyl benzene and xylene were not detected at or above the laboratory reported detection limits in the soil sample I collected from MW-2 at a depth of 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 µglkg, 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 µg/kg, 6,000 pAg, and 28 mg/kg, ' respectively) A ,ummary of the laboratory analytical results of the soil samples are presented below in Table B5 ' TABLE B 5 Soil Sample Analytical Results ' Gasoline TEPII g T E X TP -G Oxygenates/ Additives Kerosene Diesel Motor Oil f)ett.ctlon 50 5 0 5 0 5 0 1 0 100 1 0 1 (I 100 I tMits µg/kg µ10'g lig/kg pgjkg mgft Pg/kg mgfkg mg/kg mg/kg Samplt. ID ' MW 1-6 ND ND ND ND ND ND ND ND ND MW2-4 ND 16 ND ND 12 1,300 ND ND ND ' (MTBE)** MW4-6 ND 100* ND 100* 680 6 000 28 ND ND ND ND ' Unit Conversions Anal cal µ /kb parts per billion(ppb) BTEX—benzene toluene ethyl benzene and xylene TEPit-total oletun hydrocarbons quantified as kerosene diesel and motor oil mb/ky parts per million(ppm) TPH G total petroleum hydrocarbons,quanttrrod as gasoline ' MTBE methyl tertiary butyl ether ND_none detected at or above laboratory detection Worts ND X*—none detected to a level of X **=all other gasabne additivesloxygenates 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-I Toluene, ethyl benzene, and TPH-G were not detected at or above the laboratory reported detection limits in the groundwater 1