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N%,/ <br /> June 10, 2005 <br /> NOA Project Number: E05070A <br /> 5.1 Soil Boring Locations <br /> Three soil borings were advanced on the Site to depths of 3.46, 3.21, and 3.23 feet. The soil borings <br /> were used later for percolation test holes;the locations of the borings are indicated on Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> The soil borings were three feet deep, as noted above, and were four inches in diameter. <br /> 5.3 Soil Lithology Observed <br /> L 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 <br /> shallow soil borings; conditions were comparable in all three borings. <br /> C Table 4. <br /> ` Soil Boring Lo <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3.5 Medium brown sil cla CL (J3� <br /> Note: Conditions were comparable in all holes,P-1 through P-6,shallow and deep. <br /> 5.4 Discussion of Soil Lithology <br /> L A visual inspection of the shallow soils from on-site drilling indicates minimal potential for <br /> percolation. A percolation test is the best method to determine the suitability of the soils. Please 1 <br /> see the next section for percolation test results. Generally speaking, sandy soils have much greater <br /> h potential for percolation than fine-grained and clayey soils. <br /> 4 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> f A site map indicating the locations of the percolation test holes is included as Plate I in the appendix /� r' <br /> L of this report. ( J <br /> 6.2 Number of Percolation Tests <br /> L <br /> Three shallow percolation tests were conducted the Site;only one percolation test was observed by <br /> Lan Registered Environmental Health Inspector. <br /> 6 <br /> "'44 <br /> L <br />