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I <br /> . TPH as gasoline <br /> Water samples were analyzed for TPH (gasoline and diesel) and BTE&X in accordance <br /> with EPA methods 8015m and 602, respectively <br /> I <br /> 4.0 FINDINGS <br /> I4.1 Stratigraphy <br /> ' Silt and clay is predominant at the site The borings penetrated alternating beds of silt, silty <br /> clay and clayey silt from the surface to a depth of 60 or 65 feet In the three deeper borings <br /> (MW-1, MW-2 and MW-3), the silty clay is present from 65 to 80 feet and silty sand and <br /> ' silty fine-grained sand are present from 80 feet to the bottom (88 feet) The Boring Logs, <br /> which describe the soils encountered, are included in Appendix A <br /> ' 4.2 Relative Groundwater Elevation and Gradient <br /> The relative elevations of groundwater in the monitoring wells on November 11, 1993, are <br /> listed in Table 2 The relative elevations were calculated by subtractmg the groundwater <br /> depth in each well from the relative casing elevation The gradient was calculated to be <br /> 0 0063 ft/ft directed N 35° E (Figure 3) This is consistent with data from nearby wells (USA <br /> Gasoline, located southeast of the site), although a regional trend is difficult to determine <br /> TABLE 2 <br /> RELATIVE GROUNDWATER ELEVATIONS <br /> I Relative Depth to Relative <br /> Well No Casing Elevation Groundwater Groundwater <br /> Elevation <br /> MW-1 9809 7466 2343 <br /> MW-2 9750 7426 2324 <br /> MW-3 9740 7372 2368 11 <br /> Measurements in feet <br /> 4.3 Soil Contamination <br /> iHydrocarbon odors wei c noted in soil samples from borings B10, B11 and MW-1 at depths 1Z <br /> between 45 and 65 feet Volatile organic vapors were measured in samples from those <br /> ' borings at levels as high as 174 ppm (B11-45) <br /> r,_t"a[Au&3�Inc r� <br /> riaF<OJl2 1493/652}4 I <br />