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L •� <br /> LMarch 17,2005 <br /> NOA Project Number: E040141B <br /> F 5.1 Soil Boring Locations <br /> r <br /> Two soil borings were advanced on the Site both to a depth of three feet The soil borings were <br /> L used later for percolation test holes;the locations of the borings are indicated in Plate 1. <br /> 5.2 Soil Boring Dimensions <br /> LThe soil borings were three feet deep, as noted above, and w eZeenches in diameter. / <br /> L 5.3 Soil Lithology Observed <br /> Generally, the soil encountered in the boring is similar to the soils reported by the San Joaquin <br /> L County Soil Survey for the area (USDA, 1992). Tables 3 and 4 present the soil logs for the three <br /> foot deep soil borings. <br /> Table 3. <br /> Soil Boring Log for P-1. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-.5 Black,moist,organic clayey silt OL <br /> .5-2 Brown,moist,medium to fine sand with silt SM <br /> — 2-3 Black,wet,organic clayey silt OL t /� <br /> Table 4. <br /> Soil Boring Log for Designated Remainder. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-3 Black,wet,ox anic clave silt OL <br /> ` 5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow soils from on-site drilling indicates little 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, sandy soils have much greater <br /> potential for percolation than fine-grained soils. <br /> L <br /> L <br /> L <br /> 7 <br /> L '004 <br /> L <br />