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In accordance with the work plan, Condor conducted an additional soil and groundwater investigation on
<br /> September 10, 15, and 18, 1997, at the site Four monitor wells were drilled, Installed, developed, surveyed, and
<br /> sampler] as part of the investigation The Report - Additional Soil and Groundwater Investigation, dated
<br /> December 11, 1997, was prepared by Condor describing the investigation results
<br /> i
<br /> Laboratory analysis of the soil samples indicated that total petroleum hydrocarbons quantified as kerosene,
<br />' diesel, and motor oil (TEPH), ethanol, tertiary butanol, DIPE, ETBE and (TAME) were not detected at or above
<br /> the laboratory reported detection limits in any of the samples collected from the monitoring wells during the
<br /> September, 1997, sampling event BTEX, TPH-G, and MTBE were not detected at or above the laboratory
<br />' reported detection limits in the soil sample collected from MW-1 at a depth of six feet bgs Benzene, ethyl
<br /> benzene and xylene were not detected at or above the laboratory reported detection limits in the soil sample
<br /> collected from MW-2 at a depth of four feet bgs Toluene, TPH-G and MTBE were detected in the soil sample
<br />' 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
<br /> and toluene were not detected at or above the raised laboratory reported detection limit in the soil sample
<br /> collected from MW-4 at a depth of six feet bgs MTBE was not detected at or above the laboratory reported
<br />' detection limit in the sample collected from MW-4 at a depth of six feet Ethyl benzene, xylene and TPH-G were
<br /> detected in the soil sample collected from MW-4 at a depth of six feet (680 µg/kg, 6,000 µ/kg, and 28 mg/kg,
<br /> respectively) A summary of the laboratory analytical results of the soil samples are presented below in Table
<br />' B5
<br /> TABLE B.5
<br />' Soil Sample Analytical Results
<br /> S T E X TPH-G Gasoline TEPH
<br /> Oxygenates/
<br /> Additives
<br /> Kerosene Diesel 'Motor
<br /> Oil
<br />' Detection 50 50 so 5 0 1 0 100 1 0 1 0 1 0 0
<br /> Limits ltg/kg nikg lagfkg 4g/kg mg/kg lxgfg mg/kg mg/kg mg/kg
<br />' Sample
<br /> 1. 1D
<br /> MW1-6 ND 'SID ND ND ND ND ND ND ND
<br /> MW2-4 ND 16 ND ND 12 1,300 ND ND ND
<br /> (MTBE)**
<br /> MW4-6 ND 100* ND 100* 680 6,000 28 L ND ND ND ND
<br /> Unit C09Yers7005 Real
<br /> A&g pacts per billion(ppb) BTEX-benzene,toluene ethyl benzene and xylene
<br /> mg/kg parts per million(ppm) TEPH total petroleum hydrocarbons,quanufeed as kerosene diesel,and motor oil
<br /> TPH-G-total petroleum hydnorarboes,gttaatr5ed as gasobm
<br /> MTBE=methyl ternary butyl ether
<br /> ND-none detected at or above Inboratory detection limits.
<br /> ND X*-none detected to a level of X
<br />' ••-all other gasol=addmvesloxygenates were not detected at or above the laboratory reported
<br /> pori hm1ts
<br /> Laboratory analysis of the groundwater samples indicated total petroleum hydrocarbons quantified as kerosene,
<br />' diesel, and motor oil (TEPH), ethanol, DIPE and ETBE were not detected at or above the laboratory reported
<br /> detection limits in any of the groundwater samples collected from the monitoring wells during the September,
<br /> 1997, sampling event BTEX, the selected gasoline oxygenates/additives and TPH-G were not detected at or
<br /> above the laboratory reported detection limits in the groundwater sample collected from MW-1 Toluene, ethyl
<br /> benzene, and TPH-G were not detected at or above the laboratory reported detection limits in the groundwater
<br /> 1
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