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L <br /> L June 1,2006 <br /> NOA Project Number: E05179A <br /> LThe surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of,Madera sandy loam, 0-2% slopes (Plate 8) (USDA, 1992). Table 2 presents <br /> Lsome selected properties of these soils: <br /> Table 2. <br /> San Joaquin County Soil Survey <br /> Selected Soil Properties of On-Site Soils. <br /> Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank <br /> ` and Map (in) mmhos/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Madera 0-19: Sandy loam;SM <2 5.6-7.3 2.0-6.0 Severe: <br /> sandy loam, 19-23: Sandy clay loam;SC <2 6.1 -7.3 0.2-0.6 cemented <br /> 0-2% 23-29: Clay,day loam;CL,CH,SC <2 6.6-8.4 <0.06 pan,peres <br /> it slopes,193. 29-60: 1 Indurated 1 <2 1 --- slowly. <br /> � Note:The table descriptions do not necessarily reflect site-specific soft properties. <br /> L <br /> 5.1 Soil Boring Locations <br /> I <br /> 6. A total of five soil borings were advanced on the Site, four to a depth of approximately three feet <br /> and three to a depth of approximately 25 feet. The soil borings were used later for percolation tet,6- <br /> Lholes;the locations of the borings are indicated in Plate 1' <br /> 5.2 Soil Boring Dimensions <br /> LThe soil borings were approximate`yy 3 feet and 25 feet,as noted above,and were four inches-in <br /> diameter. <br /> C <br /> 60 5.3 Soil Lithology Observed <br /> L Generally, the soil encountered in the boring is similar to the soils reported by the San Joaquin <br /> County Soil Survey for the area (USDA, 1992). Tables 3 presents the soil log for the soil borings. <br /> Table 3. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Light brown,moist,silty clay `--CL <br /> 3-15 Dark brown,moist,fine silty sand SM <br /> 15-25 Brown,moist coarse-grained sand SP <br /> 5 <br />