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L .� <br /> LOctober 5,2005 <br /> NOA Project Number. E05129A <br /> LTable 4. <br /> Soil Boring Log <br /> LDepth Interval(ft) Soil Type Unified Soil Classification <br /> 0-1.75 Dark brown,moist, clayey silt ML <br /> I <br /> L 1.75-3.5 Brown, moist, sand with some silt SP <br /> 3.5-8 Brown, moist, sand• silt SP <br /> 5.4 Discussion of Soil Lithology <br /> L <br /> A visual inspection of the shallow and deep soils from on-site drilling indicates some potential for <br /> satisfactory percolation. A percolation test is the best method to determine the suitability of the <br /> 6 soils. Please see the next section for percolation test results. Generally speaking, sandy soils have <br /> much greater potential for percolation than fine-grained soils. <br /> 6. <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 /> v <br /> One shallow percolation test was conducted on the Site, for a total of one shallow percolation test <br /> i~ <br /> 6.3 Boring Preparation and Presaturation <br /> b. <br /> The soil boring was advanced on the Site with a hand auger on September 19, 2005. <br /> LA 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> 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. Several feet <br /> L 9 <br /> L <br />