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i <br /> November 3, 2005 <br /> NOA Project Number: E05123A <br /> Table 4. <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 /> F Symbol pH (in/hr) fields <br /> Stockton 0-29 Clay;CL,CH <2 7.4-8.4 .06-.2 Severe:peres <br /> clay,0-2% 29-37 Clay,silty clay;CL,CH <2 7.4-8.4 .06-.2 slowly <br /> FI! slopes,250. 37-42 Clay loam,silty clay Ioam;CL <2 7.4-8.4 .06-.2 <br /> 42-60 Cemented --- --- -- <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> F15.1 Soil Boring Locations <br /> A total of two soil borings were advanced on the Site. One boring was drilled to a depth of three <br /> and a half feet and one boring was drilled to a depth of about 25 feet. The soil borings were later <br /> used for the percolation test holes; the locations of the borings are indicated in Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> The soil borings were three and a half feet or 25 feet deep, as noted above, and were four inches in <br /> diameter. <br /> 5.3 Soil Lithology Observed <br /> 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). Table 5 presents a representative soil log for the <br /> deep soil borings. Conditions were comparable in the shallow boring hole. <br /> ' Table 5. <br /> Soil Boring Log. <br /> F , Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Dark brown-red,slightly moist,silty fine to SM <br /> jF medium sand with clay <br /> 4 3-4 Dark brown-red,slightly moist,silty fine to SM <br /> medium sand with clay(slightly cemented) <br /> F! 4-25 Dark brown,moist,clayey sand(slightly SC <br /> cemented <br /> Fj <br /> 7 <br /> FI <br />