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f September 9,2005 NOA Project Number: E65110A 5.4 Discussion of Soil Lithology A visual inspection of the shallow and deep soils-from on-site drilling indicates some potential for percolation because of the silty nature of the soils. A percolation test is the best method to determine the suitability-of-the soils for a septic disposal area. Please see the next section for: percolation test results. -Generally speaking; sandy soils have much greater potential for percolation than'fine-grained or cemented soils..- 6.0 oils. .6.0 PERCOLATION TEST INFORMATION 6.1 Percolation Test Locations A`site map indicating the locations of the percolation test holes is included as Plate.l in the appendix {p.)l of this report..- 6.2 Number of Percolation Tests. One shallow and one dee percolation test was conducted on the subject property. 4) P 6.3 Boring Preparation and Presaturation' One shallow and one deep soil boring were advanced on the subject property with the a truck- , mounted deep tock augur rig on August 25, 2005. A 1.5-inch diameter PVC-pipe with perforations on the bottom was used to measure the..drop of water in the percolation test boring. -Approximately 2 inches of"pea gravel" were placed in.the -- bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea Gravel" was then used to backfill in the annular space. 3 Presaturation of the percolation test holes occurred on August 25, 2005. The depth of water used to pre-soak was 12 inches above the bottom of the boring. ' 6.4 Condition of Borings After Presaturation. After the 24-hour soak period, the presaturated.holes were found to be intact on August 26, 2005. 01;7i The shallow hole_was dry and the deep hole contained crater at a depth of 22.85 feet. 6.5 Percolation Test Procedure Percolation tests were conducted for the borings on August 26, 2005 in accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each