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March 3,2005 <br /> NOA Project Number: E04155A <br /> 15.1 Soil Boring Locations <br /> Two soil borings were drilled on the Site. One boring was advanced to a depth of three feet and the <br /> other to a depth of 25-feet: The soil borings were used later for percolation test holes; the locations <br /> -- of the borings are indicated in Plate 1. <br /> /5.2Soil Boring Dimensions <br /> a The soil borings were three feet deep or 25-feet deep, as noted above, and were four inches in <br /> diameter. <br /> /5.3 Soil Lithology Observed <br /> S 3 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 the soil log for the 25 foot deep <br /> �Isoil boring. The soils were comparable in the shallow boring. <br /> Table 4. <br /> Soil Boring Log for P-1. <br /> r` Depth Interval (ft) oil T e Unified Soil Classification <br /> i <br /> +� 0-16 Brown,moist, silty sand SM <br /> 16-25 Brown,moi sand SM <br /> i <br /> /5.4 Discussion of Soil Lithology <br /> [� A visual inspection of the shallow and deep soils from on-site drilling indicates some potential for <br /> i satisfactory percolation. A percolation test is the best method to determine the suitability of the <br /> soils. Please see the next section for percolation test results. Generally speaking, sandy soils have <br /> much greater potential for percolation than fine-grained soils. <br />+ ✓6.0 PERCOLATION TEST INFORMATION <br /> 6./ 6.1 Percolation Test Locations <br /> "—' A site map indicating the locations of the percolation test holes is included as Plate 2 in the appendix <br /> of this report. <br /> 6.2 Number of Percolation Tests <br /> F, <br /> One shallow and one deep percolation test were conducted on the Site. <br /> 7 <br />