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FJ - <br /> April h, 2005 <br /> NOA Project Number: E05034A <br /> Table 4.. <br /> Soil Boring Log._ <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-1.0 Medium brown,moist,silt with sand, CL <br /> 1.0-3.0 Light brown,moist,verysand silt with same cla CL <br /> k / <br /> ✓ 5.4 Discussion of Soil-Lithology <br /> F1A'visual inspection of the shallow soils from on-site drilling indicates possible potential for <br /> percolation because of the clayey nature of the soils. A percolation test is the best method to <br /> determine the suitability of the soils. Please see the next section for percolation test results. <br /> Generally speaking,sandy soils have much'greater potential for percolation:than fine-grained or <br /> cemented soils. _ <br /> 6.0 PERCOLATION TEST INFORMATION <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 <br /> of this report. <br /> F6.2 Number of Percolation Tests <br /> ' One shallow percolation-test was conducted on the Site. <br /> 6.3 Boring Preparation and Presaturation <br /> A total of one shallow soil borings was advanced on the Site with a hand augur on March 18,2005. <br /> 1_l _ _ -• - <br /> A 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 /> Fi bottom of the open soil boring, then the PVC pipe was installed on top-of the gravel. "Pea Gravel" <br /> was then used to backfill in the annular space. <br /> Presaturation of the percolation test holes occurred on Sunday, March 20, 2005. The depth of water <br /> used to pre-soak was 12 inches above the bottom of the borings. <br />