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i -April 29,2005 <br /> NOA Project Number: E05040A <br /> 5.1 Soil Boring Locations <br /> A total o 6 soi�were advanced on the Site, one boring to a depth of three feet and.one <br /> boring to a depth of 25 feet was drilled on each parcel. The soil borings were used later for <br /> percolation test holes; the locations of the-borings are-indicated in Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> _- <br /> The soil borings were 25 feet or'three-feet deep, as noted above, and were four inches in diameter. <br /> .5.3 Soil Lithology Observed - <br /> f _ 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 representative soil log for the 25 <br /> foot deep soil borings.: Conditions were comparable in all holes, though some areas.were more <br /> cemented than others. <br /> - Table 4. <br /> _Soil Boring Log. <br /> 1 Depth Interval(ft) _ Soil Type Unified Soil Classification <br /> 0-4.5 Brown,moist;-fine sandy clay CL <br /> 4.5-15 Olive brown,moist,fine sandy clay SC <br /> 15-25 Brown,moist,medium to fine sand SP <br /> 5.4 Discussion of Soil Litholo - <br /> g3' <br /> A visual inspection of the shallow and deep soils from on-site drilling indicates potential for <br /> percolation because-'of the amount of sand in the soils. A percolation test is the best method to <br /> determine the suitability of the soils-for a septic system disposal area. Please see the next section for <br /> percolation test results. Generally speaking, sandy soils have much greater potential for percolation <br /> than fine-grained or cemented soils. <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1' Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 1 in the appendix <br /> of this report,.F <br /> - 7 <br /> F1 <br />