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June 14, 2005 <br /> NOA Project Number: E05034A <br /> 4-25 Dark brown,moist,clayey sand(slightly SC <br /> cemented <br /> /5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow soils from on-site drilling indicates possible potential for <br /> F1 percolation because of the clayey nature of the soils. A percolation test is the best method to <br /> determine the suitability of the soils for a septic disposal area. Please see the next section for <br /> percolation test results. Generally speaking, sandy soils have much greater potential for percolation <br /> than fine-grained or cemented soils. <br /> �6.0 PERCOLATION TEST INFORMATION <br /> /6.1 Percolation Test Locations <br /> F <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 /> F1One shallow and one deep percolation test was conducted on each proposed parcel of the Site. For <br /> �a total of four shallow and four deep percolation tests. <br /> 1 ; <br /> 6.3 Boring Preparation and Presaturation <br /> Fj <br /> Four shallow soil borings and four deep percolation test holes were advanced on the Site with a <br /> truck mounted deep rock augur rig on and May 27, 2005,May 31, 2005 and June 6, 2005. <br /> A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> fill 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 /> Presatutation of the percolation test holes occurred on June 7, 2005. The depth of water used to <br /> pre-soak was 12 inches above the bottom of the borings. <br /> r <br /> 1/6.4 Condition of Borings After Presaturation <br /> i <br /> After the 24-hour soak period, the presaturated holes were found to be intact on June S,2005. All of <br /> the percolation test holes,with the exception of the shallow hole on Parcel 4,were found to be dry <br /> on the day of testing. The shallow hole on Parcel 4 contained water in it on they day of testing. <br /> 0 9 <br />