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June 13, 2005 <br /> NOA Project Number: E05071A <br /> Table 4. <br /> Soil Boring Log. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-.5 Gravel Fill Fill <br /> .5-3 Reddish brown sandy silt with I IL <br /> some clay,slightly moist <br /> 3-8 Reddish brown sandy silt moderately cemented NIL <br /> with some clay and thin calcium carbonate lenses <br /> / 5.4 Discussion of Soil Lithology <br /> y A visual inspection of the soils from on-site drilling indicates some potential for percolation because <br /> of the sandy content of the soils. A percolation test is the best method to determine the suitability <br /> of the soils. Please see the next section for percolation test results. Generally speaking, sandy soils <br /> have much greater potential for percolation than fine-grained or 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 /> J6.2 Number of Percolation Tests <br /> /One shallow and one deep percolation test were conducted on the subject property. <br /> d 6.3 Boring Preparation and Presaturation <br /> A total of two shallow and two deep soil borings were advanced on the Site. The deep soil borings <br /> were drilled with a truck-mounted deep rock augur rig on June 6, 2005. The shallow borings were <br /> drilled with a hand auger on the same day. <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 /> 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 June 6, 2005. The depth of water used to <br /> 8 <br />