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, ry <br /> _ Y - <br /> EVAX Project 2260-03 6 May 1991 <br /> If <br /> i <br /> - <br /> f - <br /> Soil Analyses <br /> Laboratory analyses results of soil samples are summarized in Table 1. <br /> Detectable hydrocarbon concentrations were found in soil samples taken <br /> from the boring of MW-25. Maximum concentrations of 4,800 ppm TPHg, 7.1 <br /> ppm B, 95 ppm T, 42 ppm E, and '_?0 ppm X were found in a sample taken at <br /> a depth of 40.5 feet below ground surface. Minimum concentrations (i.e., <br /> <1.0 ppm TPHg, <0.005 ppm B, 0.007 ppm T, <0.005 ppm E, and 0.033 ppm X) <br /> were found in a sample taken at a corresponding depth of 60.5 feet near <br /> the current groundwater level . Field and laboratory data (Table 1 and <br /> Appendix B) indicate hydrocarbon impact of soils decreases below a depth <br /> of approximately 60 feet with proximity to groundwater. <br /> No TPHg or BTEX was detected in soil samples from the baring of VW-26, <br /> except for a sample taken at a depth of 40.5 feet below ground surface. <br /> The 40.5-foot level sample contained: 580 ppm TPHg, <0.005 ppm B, 3.5 ppm <br /> T; <0.005 ppm E, and 14 ppm X. Hydrocarbon impact of soils in the <br /> vicinity of VW <br /> 26 is less widespread than in the vicinity of !1W-25 (i able <br /> I and Appendix B). <br /> Water Analyses f <br /> Results of the groundwater sampling event of Mit-25 for April 3, 1991 are <br /> presented in Table 2. No floating product, sheers, or other visible <br /> I1 evidence of hydrocarbon products was observed in the well. No TPHg, <br /> TPHd, or BTEX was detected in water sampled from the well. Laboratory 4 <br /> -� detection limits were reported at 50 part per billion (ppb) for TPHg, 100 <br /> ppb for TPHd, and 0.5 ppb for each of the BTEX constituents. <br /> E <br /> �s y <br /> fi <br /> k,x <br /> } 4 <br /> yam' i <br /> j <br />