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May 2, 2007 <br /> NOA Project Number: E07040B <br /> No ground water was encountered by the staff of Neil O. Anderson&Associates, Inc. during the <br /> i" drilling of the percolation test hole to a depth of approximately three and half feet on March 21, <br /> 2007. <br /> 4.2 Potential Ground Water Contamination Issues <br /> Identifying potential ground-water contamination sources was not part of the scope of work for the <br /> ~ soil suitability study. Potential ground-water contamination can occur from a number of sources <br /> which often include leaky underground storage tanks,agricultural activities, dairies, septic systems, <br /> and storm water infiltration. Any past agricultural activities and the present use of septic systems in <br /> the area should be considered potential ground-water contamination sources. <br /> 4.3 Water Sample Location <br /> No wells exist on site. No well permits were found during a file review on February 15,2007 at the <br /> EHD. No water sample was taken or analyzed. <br /> i. <br /> 4.4 Water Sample Constituents <br /> No water sample was taken or analyzed for the subject property. <br /> �- 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the USGS Geologic Map of the San Francisco-San Jose Quadrangle(1991) as within <br /> the Quaternary Modesto Formation (Plate 7). These map units represent arkosic alluvium forming <br /> Mokelumne River terraces,channel ridges and alluvial fans. The alluvium is a tan and light-gray <br /> gravely sand, silt and clay except where derived from volcanic rocks when it is distinctly red and <br /> �- black with minor brown clasts. <br /> The surface and near surface soils located at Site are reported by the San Joaquin County Soil Survey to <br /> be composed of Jacktone-Urban Land Complex, 0 to 2 percent slopes, (Plate 7) (USDA, 1992). <br /> Table 1 presents some selected properties of these soils: <br /> L <br /> L <br /> 4 <br /> .,44 <br /> r. <br />