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August 5, 2005 <br /> NOA Project Number:.E05098A - <br /> - Table 3. <br /> Soil-Boring Log. <br /> Depth Interval(ft) -Soil Type Unified Soil Classification <br /> 0-3 - Reddish-brown sandy silt NIL <br /> ` 3-5 Reddish brown to grey;clayey sand . - SC <br /> 5-8 —, Light brown,silty sand,hardpan SM <br /> 8-14 Reddish brown,sandysilt with clay = ML <br /> 14-20 Light brown,sandy silt with clay - ML <br /> 22-25 Tan;cla _sand _ = SC. <br /> e <br /> ✓5.4 Discussion of Soil Lithology. <br /> A visual inspection of tle soils from on site drilling indicates potential for percolation because.of the <br /> sandy nature of.the sails. A percolation test is the best methodto determine the suitability of the <br /> soils. Please see the next section,for percolation-test results. "Generally speaking;-sandy soils have <br /> much greater potential for percolation-than-fine-grained or cemented soils. . <br /> 6.0 PERCOLATION TEST.-INFORMATION = <br /> p/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 <br /> of this report. _ <br /> /6.2 Number of Percolation Tests <br /> Two shallow and two deep percolation tests were conducted fora total 4 four percolation tests on <br /> the site. <br /> �6.3 Boring Preparation and Presaturation <br /> A total of four soil borings, two shallow and two deep, were drilled with a_-truck-mounted deep rock <br /> r augur rig on August 1:.20-05.- <br /> A4.5-inch <br /> ;2005.A1.5-inch diameter PVC pipe with perforations on-the bottom was used to.measuze 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. "Pea gravel" <br /> 7 <br /> - <br />