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June 8,2006 <br /> NOA Project Number: E06036A <br /> 5.3 Soil Lithology Observed <br /> Generally, the soils encountered in the borings were similar to the soils reported by the San Joaquin <br /> County Soil Survey for the area (USDA, 1992). Table 3 and 4 present a representative soil log for <br /> ` the deep soil borings. Conditions were comparable in the shallow boring holes. <br /> Table 3. <br /> `– Soil Boring Log for Parcel 2. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Dark brown,slightly moist,silty fine to medium SC <br /> sand with clay <br /> T _3-5 Dark brown,slightly moist,silty fine to medium SC <br /> _-` san —wiff clay(slightly cemented) <br /> 5-15 Dark brown,moist clay with some cobbles GC <br /> (slightly cemented <br /> Table 4. <br /> J Soil Boring Log for Parcel 1. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Dark brown,slightly moist,silty fine to medium SC <br /> sand with clay <br /> (' 3-4 Dark brown,slightlwm^oist silry_finP r..nnxi. SC <br /> sand with clay(slightly cemented) <br /> 4-25 Dark brown,moist,clayey sand(slightly SC <br /> cemented <br /> 5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow soils from on-site drilling indicates little potential for percolation <br /> because of the clayey nature of the soils. A percolation test is the best method to determine the <br /> suitability of the soils for a septic disposal area. Please see the next section for percolation test <br /> results. Generally speaking, coarser-grained soils have much greater potential for percolation than <br /> fine-grained or cemented soils. <br /> y 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the location of the percolation test holes is included as Plate 1 in the appendix <br /> 6 <br />