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L <br /> LApril 24,2006 <br /> NOA Project Number: E06015A <br /> LTable 4. <br /> �Ls) Soil Boring Log Subject Property (Shallow and Deep). <br /> ` Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0-3 Dark brown clay,moist CL <br /> l 3-15 Brown fine silty day CL <br /> 8-25 Brown silty sand,moist SM <br /> Note:Descriptions are representative of soil conditions encountered in both shallow and deep borings. <br /> 5.4 Discussion of Soil Lithology <br /> LA visual inspection of the deep soils from on-site drilling indicates some potential for satisfactory �s•�) <br /> percolation. A percolation test is the best method to determine the suitability of the soils for a <br /> LLseptic disposal area. Please see the next section for percolation test results. Generally speaking, <br /> coarser grained soils have much greater potential for percolation than fine-grained soils. <br /> 6.0 PERCOLATION TEST INFORMATION <br /> L6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 1 of this report. 6,4) <br /> L6.2 Number of Percolation Tests <br /> IOne shallow and one deep percolation test was conducted on the Site. <br /> 6.3 Boring Preparation and Presaturation <br /> LThe soil borings on the site were advanced in an all-terrain-mounted deep rock auger rig on March <br /> 27,2006. <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 "Pea gravel' <br /> L, was used to backfill in the annular space. <br /> { Presaturation of the percolation test holes occurred on March 27, 2006. The depth of water used to <br /> L pre-soak was 12 inches above the bottom of the boring. <br /> I <br /> .444 r <br /> L <br />