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LNovember 8,2004 <br /> NOA Project Number: E0401 10A <br /> LP"5.1 Soil Boring Locations <br /> ` A total of 24 soil borings were advanced on the Site, 12 to a depth of 25 feet and 12 to three feet <br /> Ldepth. The soil borings were used later for percolation test holes; the locations of the borings are <br /> indicated in Plate 1. <br /> L /5.2 Soil Boring Dimensions <br /> LThe soil borings were 25 or three feet deep, as noted above,and were six inches in diameter. <br /> d5.3 Soil Lithology Observed <br /> LGenerally, 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 4 presents a representative soil log for the <br /> L 25-foot deep soil borings. Conditions were comparable in all the deep borings, though some holes <br /> were more cemented than others. <br /> I Table 4. <br /> Soil Boring Log for P-1 through P-12 <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-2 Light brown silt with fine sand SM <br /> 2-9 Reddish brown silt with fine sand,cemented SM <br /> 9-16 Brown silt,cemented ML <br /> 16-20 Dark brown silt with medium to coarse sand, SM <br /> cemented <br /> L 20-24 Dark brown silt with coarse sand,cemented SM <br /> L 24-25 Siltv coarse sand SM <br /> Note:Conditions were comparable in all holes,P-1 through P-12,shallow and deep. <br /> 5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow and deep soils from on-site drilling indicates little potential for <br /> L percolation because of the cemented nature of the soils. A percolation test is the best method to <br /> determine the suitability of the soils. Please see the next section for percolation test results. <br /> Generally speaking, sandy soils have much greater potential for percolation than fine-grained or <br /> Lcemented soils. <br /> L <br /> L 7 '404 <br /> L <br />