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OEOMATRIX <br /> The groundwater samples were submitted for analyses of TPH quantified as gasoline (TPHg; <br /> C4-C12 carbon range) and TPH quantified as diesel (TPHd; C10-C24 carbon range) by EPA <br /> Method 8015M, (TPHd was analyzed both with and without silica gel cleanup by EPA Method <br /> 3630); for BTEX by EPA Method 8020; and for PAHs by EPA Method 8270C SIM. <br /> 4.0 RESULTS <br /> Based on June 1999 water level measurements, the water table occurs at a depth of <br /> approximately 30 to 32 feet bgs and the gradient direction is to the northeast; these data are <br /> consistent with previous measurements by others. <br /> Stained soil and hydrocarbon odor was observed in boring GMX-1, GMX-3 and GMX-6 from <br /> depths of 15.5 to 49.5 feet, 20.0 to 51.5 feet, and 19.5 to 29.5 feet bgs, respectively. No <br /> staining or odor was observed in borings GMX-2, GMX-4, GMX-5, and GMX-7. Boring logs <br /> are presented in Appendix B. <br /> No TPHc, PAHs, or BTEX were detected in the soil samples collected from borings GMX-2, <br /> GMX-4, GMX-5, GMX-6, GMX-7. TPHc was detected in the soil sample collected from <br /> GMX-3 at a concentration of 10,000 milligrams per kilogram (mg/kg) and eight PAHs were <br /> detected at concentrations ranging from 0.007 to 0.55 mg/kg. No TCE or other VOCs were <br /> detected in the soil samples collected from boring GMX-1 (Figure 3). <br /> No TPHd, TPHg,PAHs, or BTEX were detected in groundwater sample collected from <br /> WFSMW-1, which is located downgradient of GMX-3. TPHg and TPHd were detected in the <br /> groundwater sample collected from GMX-6 at concentrations of 110 micrograms per liter <br /> (}Lg/l) and 92 }Lg/l, respectively. Following a silica gel cleanup, the detected concentration of <br /> TPHd was 52 [igll. Benzene (1.5 µg11) and naphthalene (0.3 }Lgll) were also detected in this <br /> sample. Although this location is downgradient from the sheen in MW-1, the detection of <br /> benzene in groundwater is uncharacteristic of OVP, and the chromatograms from the GMX-6 <br /> sample are uncharacteristic of those from OVP sites. GMX-6 is located adjacent to a property <br /> that formerly operated as a gasoline station. <br /> Soil and groundwater analytical results are presented in Tables 1 and 2 and shown on Figure 3. <br /> Analytical laboratory reports and chain-of-custody records are included in Appendix C. <br /> 1.1DOC_SAFF\50005153801501L GW RPT-DOC 4 <br />