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../ <br /> September 9, 2005 <br /> NOA Project Number: E05106B <br /> Table 4. <br /> Soil Bori Log for P-1. <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Dark Brown,grayish black fat clay CL-CH <br /> 3-15 Tan light brown silt with some sand ML <br /> 15-18 Light brownish tan very fine sandy silt SM <br /> 18-23 Reddish brown,very fine sandy silt SM <br /> 23-25 Reddish brown,silty sand with some gravel SP <br /> Note:Conditions were comparable in the shallower holes. <br /> 5.4 Discussion of Soil Lithology <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 /> soils for a septic disposal area. Please see the next section for percolation test results. Generally <br /> speaking, sandy soils have much greater potential for percolation than fine-grained soils. <br /> 6.01PERCOLATION TEST INFORMATION <br /> ` 6.1Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 1 of this report. <br /> 6.21J Number of Percolation Tests <br /> One shallow and two deep percolation tests were conducted on each Parcel, for a total of two <br /> i shallow and two deep percolation tests. <br /> L6.3 Boring Preparation and Presaturation <br /> The soil borings on Parcels 1 and 2 were advanced on the Site with a truck-mounted deep rock <br /> auger rig on August 18, 2005. <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 used to backfill in the annular space. <br /> L 8 "0044 <br /> i <br />