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I <br /> it \..I <br /> L September 21, 2005 <br /> NOA Project Number: E05104A <br /> Table 3. <br /> Soil Boring Log. <br /> Depth Interval(&) Soil Type Unwed Soil Classification <br /> 0-3 Dark gray clay CL-CH <br /> 3-5 Dark brown clay CLCH <br /> 10 Reddish brown silty clay CL <br /> 15 Light reddish brown silty clay CL <br /> 20 Tannish brown clayey silt ML 'of <br /> 25 Tan silty sand with day SP <br /> L <br /> 5.4 Discussion of Soil Lithology <br /> L A percolation test is the best method to determine the suitability of the soils. Please see the next l 5 <br /> section for percolation test results. Generally speaking, sandy soils have much greater potential for <br /> 1 percolation than fine-grained or cemented soils. <br /> L (� <br /> 6.0 PERCOLATION TEST INFORMATION <br /> L <br /> 6.1 Percolation Test Locations <br /> ` A site map indicating the locations of the percolation test holes is included as Plate 1 in the appendix (Ile. <br /> of this report. <br /> L6.2 Number of Percolation Tests <br /> Seven shallow and seven deep percolation tests were conducted for a total of fourteen percolation C .2) <br /> Ltests on the site. <br /> L6.3 Boring Preparation and Presaturation <br /> A total of fourteen soil borings, seven shallow and seven deep, were drilled with a truck-mounted fee 3� <br /> Ldeep rock augur rig on August 9, 2005. 1 <br /> A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> L water in the percolation test boring. Approximately 2 inches of"pea gravel' were placed in the <br /> bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel' <br /> L g <br /> I <br />