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December 6,2005 <br /> NOA Project Number: E05128A <br /> 5.1 Soil Boring Locations <br /> L One soil boring was drilled to a depth of approximately eight and a half feet,and two soil borings <br /> were drilled to a depth of approximately three and a half feet on the Site. The three and a half foot <br /> soil borings were later used as percolation test holes, see Plate 1 for the boring locations. <br /> 5.2 Soil Boring Dimensions <br /> bow <br /> One soil boring was eight and a half feet deep, and two of the soil borings were approximately three <br /> and a half feet deep, as noted above,and were four inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> Generally, the soil encountered in the borings is similar to the soil reported by the San Joaquin <br /> County Soil Survey for the area (USDA, 1992). Tables 3 and 4 present the soil logs for the borings <br /> on the subject property. <br /> Table 4. <br /> Soil Boring Log for P-C. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 3 Dark Brown,moist,silt with some sand NIL <br /> Table 5. <br /> Soil Boring Log for P-D. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-3.5 Medium brown,moist,silty sand SM <br /> 3.5-8.5 Medium brown,moist,silty sand with some SP <br /> gravel <br /> 5.4 Discussion of Soil Lithology <br /> i <br /> A visual inspection of the shallow soils from on-site drilling indicates some potential for satisfactory <br /> percolation. A percolation test is the best method to determine the suitability of the soils for a septic <br /> disposal area. Please see the next section for percolation test results. Generally speaking, coarser <br /> grained soils have much greater potential for percolation than fine-grained soils. <br /> 6 <br /> .. <br /> ►. <br />