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L <br /> February 13,2007 <br /> NOA Project Number: E07010A <br /> L <br /> ` 5.2 Soil Boring Dimensions <br /> LThe soil borings were approximately three or 22 feet deep, 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 /> County Soil Survey for the area (USDA, 1992). Table 3 presents a soil log for the 22 foot deep soil <br /> borings. Conditions were comparable in all of the shallow holes. <br /> Table 3. <br /> Soil Boring Log. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0.7 Medium brown,moist clayey silt <br /> 7-16 Light brown,silty sand with clay 44 <br /> 16-22 Light brown,moist,silty sand SM <br /> 5.4 Discussion of Soil Lithology <br /> LA visual inspection of the shallow and deep soils from on-site drilling indicates potential for <br /> percolation because of the sandy 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,coarser-grained soils have much greater potential for percolation than fine- <br /> grained or cemented soils. <br /> L <br /> 7 '044 <br /> L <br />