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1.04 <br /> .. December 20,2004 <br /> NOA Project Number: E04139A <br /> 4.0 GROUND WATER INFORMATION <br /> /,/ 4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the Site. <br /> The Fall 1998 and Spring 1999 maps are the most current official maps available from the County. <br /> ` According to these maps (Plates 3-6),ground water lies between 130 and 140 feet below the ground <br /> surface and flows at a gradient of 5-10 feet per mile to the north in the vicinity of the Site. <br /> ` v No ground water was encountered by the staff of Neil O. Anderson&Associates, Inc. during the <br /> drilling of the percolation test holes to a depth of 3 feet on December 13, 2004. <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. Agricultural activities and the use of septic systems in the area should <br /> ` be considered potential ground water contamination sources. <br /> X4.3 Water Sample Location <br /> law <br /> No water sample was taken for this report because there is no well on the property;it will use city <br /> water. <br /> No well permits were found during file review at EHD on December 2, 2004 for the address of <br /> 22550 Third Street, Clements. <br /> X5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the USGS Preliminary Geologic Map of Cenotioic Deposits of the Bellota Quadrangle <br /> (1979) as within Holocene Alluvium and the upper member of the Modesto Formation. The <br /> Holocene alluvium consists of channel and levee deposits. The Modesto Formation consists of an <br /> arkosic alluvium forming Mokelumne River terraces and alluvial fan;chiefly sand with minor gravel <br /> and silt;probably glacial outwash (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of Tokay fine sandy loam, 0 to 2 percent slopes (Plate 8) (USDA, 1992). Table 3 <br /> presents some selected properties of these soils: <br /> 5 <br /> 60 '0044 <br /> ka <br />