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r _ <br /> March 11, 2005 - - <br /> N_OA Project-Number: E04159A <br /> /5.3 Soil Lithology Observed <br /> E 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 4 presents a soil log for the 25-foot deep soil <br /> boring. The soils were comparable_in the three foot boring. <br /> f f Table 4. <br /> F Soil Boring Log for P-1 <br /> Depth Interval(ft) Soil:Type Unified Soil Classification <br /> . 0-3 Brown,moist, silty sand with clay SM <br /> Il - <br /> 3-9 Brown,moist silty sand . = SM <br /> f 9-20 Brown,moist sandy silt with clay SM <br /> 20-25 A�Brown,moist,clayey silt ML <br /> 5.4 Discussion of Soil Lithology - <br /> I - <br /> A visual inspection of the shallow and deep soils-from on-site drilling indicates potential for <br /> 1 ! percolation. A percolation test is the.best method to_determine the suitability of the soils.- Please <br /> 1--! = see the next section far-percolation test results.- Generally speaking, sandy soils have much greater <br /> ---potential for percolation than fine-grained or cemented soils. <br /> I <br /> 1 6.0 PERCOLATION TEST INFORMATION <br /> z " <br /> V16.1 _ Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 2 in the appendix <br /> i of this report. <br /> /6.2 Number of Percolation Tests <br /> One shallow and one deep percolation test were conducted on the Site. <br /> /6.3 Boring Preparation and Presaturation <br /> A total of one shallow and one deep soil borings were advanced on the Site with a truck-mounted <br /> F11 deep rock augur rig on February_7, 2005... <br /> A 1.5-inch diameter PVC pipe with perforations on the-bottom was used to measure the drop of <br /> 7 <br />