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8.0 SUMMARY OF FINDINGS <br /> 8.1 FIELD OBSERVATIONS <br /> The site appears to be underlain by approximately one to two feet of fill material comprised of <br /> gravel and asphalt. The native materials encountered during this field investigation consisted <br /> almost exclusively of yellow-brown clay with occasional thin lenses of sand to depths greater than <br /> 30 feet bgs. The clay appears to be underlain by a sequence of silty sand and clay starting at <br /> approximately 33 feet bgs as depicted in boring SB-2. <br /> The depth to groundwater as measured in monitoring wells MW-1 through MW-4, ranged from <br /> 8.26 to 9.54 feet bgs (top of casing). <br /> The subsurface soil samples were screened in the field for volatile organic vapors with an Hnu <br /> PID. Field observations and PID readings showed no indication of volatile organic vapors at any of <br /> the boring locations. The PID readings are noted on the boring logs which are attached as <br /> Appendix A. <br /> 8.2 ANALYTICAL TEST RESULTS <br /> 8.2.1 Soil Samples <br /> Gasoline, BTEX and MTBE were not reported by the laboratory above Method detection limits <br /> (MDLs) in the soil samples collected and analyzed during this investigation. <br /> Diesel at a concentration of 21 mg/kg, was reported in the sample from boring SB-3 at a depth of <br /> approximately two feet bgs. TRPHs were reported in the soil sample obtained from boring MW4 <br /> at a depth of approximately 2.8 feet bgs. Total recoverable oil and grease (TROG) was found in <br /> samples obtained from boring MW-4 at 2.5 feet bgs, and from boring S13-2 at three feet bgs. <br /> TROG concentrations were found to be 53 mg/kg and 12 mg/kg, respectively. <br /> JN 40007-088-0I <br /> Hig`jmwD7-06jun\ar tmc.do <br /> 8-1 <br />