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i Fj May•26, 2005 NOA Project Number: E05053A 5.4 Discussion of Soil Lithology A visual inspection of the soils from on-site drilling indicates possible potential for percolation because of the clayey nature of the soils. A percolation test is the best method to determine the suitability of the soils. 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. FF 6.0 PERCOLATION TEST INFORMATION F] 6.1 Percolation Test Locations A site map indicating the locations of the percolation test holes is included as Plate 1 in thea appendix F PP (� 0 of this report. 6.2 Number of Percolation Tests One shallow and one deep percolation test was conducted on proposed Parcels 1 and 2 and one shallow percolation test was conducted on proposed Parcel 3 of the Site. For a total of three shallow and two deep percolation tests. 6.3 Boring Preparation and Presaturation j A total of three shallow soil borings were advanced on the Site with a hand augur on March 18, j2005. A total of two deep soil borings were advanced on the Site with a truck mounted deep rock auger rig on May 13, 2005 and May 16,2005. 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. 1 Presaturation of the percolation test holes occurred on May 23, 2005. The depth of water used to 3� pre-soak was 12 inches above the bottom of the borings. 1 6.4 Condition of Borings After Presaturation F After the 24-hour soak period, the presaturated holes were found to be intact on May 24, 2005. The percolation test hole contained water on the bottom. TI 7 '0044 i �