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L <br /> LJanuary 19,2006 <br /> NOA Project Number: E05161A <br /> ` 5.4 Discussion of Soil Lithology <br /> L• A visual inspection of the shallow soils from on-site drilling indicates some potential for satisfactory <br /> L percolation. A percolation test is the best method to determine the suitability of the soils for a septic <br /> disposal area. Please see the next section for percolation test results. Generally speaking, coarser <br /> grained soils have much greater potential for percolation than fine-grained soils. <br /> 4 <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test hole is included as Plate 1 of this report. <br /> L <br /> 6.2 Number of Percolation Tests <br /> ►. One shallow percolation test was conducted on each parcel of the Site for a of four shallow <br /> percolation tests. Only three of the percolation test holes will be used for this study. One of the 1994 :- <br /> borings was not in a suitable location for this study <br /> L <br /> 6.3 Boring Preparation and Presaturation <br /> LThe soil boring was advanced on the Site with a hand augur on December 6, 2005. Please see section <br /> VI of the 1994 report for details regarding boring preparation and presaturation for the 1994 borings <br /> Lfor parcel one and three. <br /> A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> i water in the percolation test boring. Approximately 2 inches of"pea gravel"were placed in the <br /> L 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 /> I <br /> L. Presaturation of the percolation test hole occurred on December 6,2005.The depth of water used to <br /> pre-soak was 12 inches above the bottom of the boring. <br /> L6.4 Condition of Borings After Presaturation <br /> L After the 24-hour soak period, the presaturated hole was found to be intact and dry on the day of <br /> testing. <br /> L6.5 Percolation Test Procedure <br /> The percolation test was conducted on December 7, 2005 in accordance with the requirements of the <br /> LEHD. A percolation test with a duration of one hour was performed for the hole. The entire hour <br /> 8 <br /> L '00A <br /> L <br />