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November 30,2007 <br /> NOA Project Number: E07192A <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 /> 4.3 Water Sample Location <br /> N permits were found for the proposed project parce. No wat r wells exist on s e. No w ter / <br /> s ple was taken. <br /> f v� <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the California Geological Survey Geologic Map of Cenozoic Deposits of the San <br /> Francisco-San Jose Quadrangle(1991) as within the Quarternary Modesto Formation. The Modesto <br /> Formation consists of Arkosic alluvium forming Mokelumne River terraces and alluvial fan;chiefly <br /> sand with minor gravel 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 Honcut sandy loam,Manteca fine sandy loam,Tinnin loamy coarse sand and <br /> Veritas, all 0-2% slopes (Plate 8) (USDA, 1992). Table 3 presents some selected properties of these <br /> soils: <br /> Table 3. <br /> San Joaquin County Soil Survcy <br /> Selected Soil Properties of On-Site Soils. <br /> Soil Name Depth Salim Soil Perme- Septic tank <br /> and Map P mmhos/cm Unified Soil Classification Reaction ability absorption <br /> Symbol (in) pH (in/hr) fields <br /> Honcut 0-21: Sandy loam;SM <2 6.1-7.3 2.0-6.0 Slight <br /> sandy loam, 21-60: Coarse sandy loam,sandy loam; <2 6.1-7.8 2.0-6.0 <br /> 0-2% SM <br /> slopes,175. <br /> Manteca 0-11 Fine sandy loam;SM <2 7.4-8.4 2.0-6.0 Severe: <br /> fine sandy 11-24 Sine sandy loam,loam,sandy <2 7.4-8.4 .6-2.0 cemented <br /> loam,0-2 loam;SM,SC-SM pan <br /> %slopes, 24-35 Indurated <2 --- --- <br /> 196 35-54 Cemented <2 --- --- <br /> 54-74 Stratified loamy sand to loam; <2 -.F 5.4 2.0-6.0 <br /> SM <br /> 5 <br />