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April 7,2006 <br /> NOA Project Number: E06020A <br /> 5.2 Soil Boring Dimensions <br /> The percolation boring was approximately three and a half feet deep, as noted above,and was four <br /> inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> 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)1, Table 3 ptesents the soil logs for the eight and a half <br /> foot soil boring. <br /> Table 3. <br /> Soil Boring Log for Designated Remainder. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-1 Light brown,very moist,clay CL <br /> 1-3.5 Light brown,moist,clay with some silt and sand CL <br /> 3.5-8.5 Light brown,moist,clay with some silt CL <br /> *No groundwater was encountered to a depth of 8.5 feet. <br /> 5.4 Discussion of Soil Lithology <br /> bm 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. Please <br /> see the next section for percolation test results. Generally speaking, coarser grained soils have much <br /> greater permeability than fine-grained soils. <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the location of the percolation test hole is included as Plate 1 of this report. <br /> 6.2 Number of Percolation Tests <br /> One"shallow"percolation test was conducted on the Site, for a total of one shallow percolation <br /> test. EHD considers a shallow percolation test boring to be between 36 and 42 inches deep. <br /> 7 "0104 <br /> 6 <br />