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_ 1 <br /> September 30, 2007 <br /> I <br /> � NOA Project Number: E07141A <br /> Table 1. <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/ Reaction ability absorption <br /> Symbol cm pH (in/hr) fields <br /> P Capay clay, 0-20: Clay: CH,CL <4 6.6- 8.4 0,06-0.2 Poor:too <br /> t-I wet,0-2% 20-44: Clay,silty clay: CL,CH <4 6.6-8.4 0.06-0.2 clayey <br /> slopes,121. 44-60: Silty clay loam,clay loam;CL <4 6,6- 8.4 0,06-0.2 <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> 5.1 Soil Boring Locations <br /> Nine percolation tests and one groundwater boring were advanced on the site, all borings were <br /> Fjdrilled to a depth of approximately three and a half feet. The groundwater boring was drilled to a <br /> depth of 8.5 feet. No ground water was encountered. The borings were used later for percolation <br /> test holes; the locations of the borings are indicated in Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> The percolation borings were approximately three and a half feet deep, as noted above, and were <br /> Fj four inches in 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 2 presents the soil log for the eight and a half <br /> F! foot soil boring. <br /> Table 2. <br /> Soil Boring Log for Designated Remainder. <br /> Depth Interval(ft) Soil Type Unwed Soil Classifica on <br /> 1-8.5 Light brown,moist,clay with some silt CIC <br /> 5.4 Discussiono of ithology <br /> A perflation test e b t method to determine the suitability of the soils. Please see the next <br /> section for~perclaJn-test results. Generally speaking, coarser-grained soils have much greater <br /> F! permeability than fine-grained soils. <br /> P <br /> 0 6 "004 <br /> 0 <br />