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L <br /> LJune 1,2006 <br /> NOA Project Number: E05148B <br /> 1 <br /> L The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Sunvy <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 Unwed Soil Classification Salinity Soil Perme- Septic tank <br /> ` and Map (in) mmhos/cm Reaction ability absorption <br /> Symbol I pH (in/hr) fields / <br /> Madera 0-19: Sandy loam;SM <2 5.6-7.3 2.0-6.0 Severe: āœ“ <br /> L sandy loam, 19-23: Sandy clay loam;SC <2 6.1 -7.3 0.2-0.6 cemented <br /> 0-2% 23-29: Clay,clay loam;CL,CH,SC <2 6.6-8.4 <0.06 pan,peres <br /> slo es, 193. 29-60: Indurated <2 --- slowl . <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> V <br /> L5.1 Soil Boring Locations <br /> A total of three deep borings to a depth of approximately 25 feet, and three shallow soil borings to a <br /> depth of three feet were advanced on each parcel of the Site for a total of six percolation test <br /> Lborings.The soil borings were used later for percolation test holes;the locations of the borings are <br /> indicated in Plate 1. <br /> L5.2 Soil Boring Dimensions <br /> The soil borings were approximately 3 feet and 25 feet, as noted above, and were four inches in <br /> Ldiameter. <br /> 5.3 Soil Lithology Observed <br /> LGenerally, the soil encountered in the boring is similar to the soils reported by the San Joaquin <br /> 4 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 /> Iāœ“ 15-25 Brown,moist coarse-grained sand SP <br /> L <br /> 5 <br /> L '.'44 <br /> L <br />