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4.0 RESULTS <br /> 4.1 Soil Borings and Soil Sampling <br /> The site 1s underlain predominantly by sands (silty and clayey sand) with some silt and clay <br /> Ground water was found during drilling in boring MW-4 at an approximate depth of 40 5- <br /> feet bgs. Ground water was not encountered in boring SB-A, <br /> No discolored soil or noticeable odors were observed during drilling activities. Reported <br /> concentrations of TPH-D and BTEX were nondetectable (ND) at method reporting limit <br /> in the soil samples collected and submitted for analyses Laboratory reports and chain of <br /> custody documents are presented in Appendix D - Analytical Laboratory Results and Chain <br />' of Custody Documentation, Soil Samples <br /> 4.2 Ground Water Flow <br /> Ground water elevations in monitoring wells MW-1 through MW-4 on May 28, 1993 are <br /> presented on Table 1. The average depth to ground water in wells MW-1 through MW-4 <br /> on May 28, 1993 was about 32 feet bgs. Figure 3 - Ground Water Elevations, May 28, 1993 <br /> shows ground water flow beneath the site to be toward the southwest at a gradient of about <br /> 25 feet per mule (0 0046 foot per foot). These data are consistent with the previous data <br /> 4.3 Ground Water Samples <br />' Laboratory analytical reports with chain of custody documentation is presented as Appendix <br /> E. Table 3 -Analytical Results Ground Water Samples summarizes the laboratory reports. <br />' TPH-D, at concentrations of 950 micrograms per Liter (µg/L) or parts per billion (ppb), <br /> were detected in the ground water samples from MW-1. However, a duplicate sample from <br />' this well reported nondetectable TPH-D results at a method detection level of 50 µg/L. <br />' BTEX was not detected in the ground water samples collected on May 28, 1993. All <br /> analytics were below the detection limits in the trip blank. <br /> F\ \5925009\ADDSASSF-RPT 8 <br /> 1 <br />