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L <br /> LNovember 27,2006 j > <br /> NCA Project Number: E06115A <br /> L5.2 Soil Boring Dimensions <br /> The soil borings were approximately six feet, and the rest were between six inches and three and a <br /> ` half feet.All holes were four inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> V 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 and 5 present the soil logs for the northern <br /> Land southern portions of the subject property. The soils were found to be slightly different from the <br /> other. <br /> - Table 4. <br /> LSoil Boring Log Subject Property Shallow and Deep). <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-2.5 Brown,fine silt ML <br /> L <br /> 2.4.5 Light grey,sandy silt SM <br /> 4.5-7.5 Black,moist peaty clay OH <br /> 7.5-125 1 Black,very moist peaty cla• IOH,PT <br /> Note:Descriptions are representative of soil conditions encountered in both shallow and deep borings. <br /> it <br /> Table 5. <br /> Soil Boring Log Subject Property Shallow and Deep). <br /> IL Depth Interval (ft) Soil Type Unified Soil Classification <br /> - 0-1 Dark brown,silty peat PT <br /> 1-3.8 Grey,moist silty clay CL <br /> 3.8-4.0 Grey,well graded gravelly sand,saturated SW <br /> Note:Descriptions are representative of soil conditions encountered in both shallow and deep borings. <br /> 5.4 Discussion of Soil Lithology <br /> L A visual inspection of the 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 / <br /> Lseptic disposal area. Please see the next section for percolation test results. Generally speaking, /Jam•�) <br /> coarser grained soils have much greater potential for percolation than fine-grained soils. \ <br /> L <br /> 8 <br /> L '44 <br />