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L <br /> LFebruary 13,2007 <br /> NOA Project Number. E07010A <br /> L 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as plate 1. the appendix <br /> of this report. <br /> 6.2 Number of Percolation Tests <br /> iOne shallow a deep percolation test were conducted on each parcel, for a total of four <br /> `o shallow and(77� p percolation tests on the subject property. <br /> L <br /> 6.3 Boring Preparation and Presaturation <br /> A total of four shallow and four deep soil borings were advanced on the Site with a truck-mounted <br /> deep rock augur rig on January 22, 2007. <br /> L A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of / <br /> L 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 /> i <br /> Q Presaturation of the percolation test holes occurred on January 22, 2007. The depth of water used <br /> ` to pre-soak was 12 inches above the bottom of the boring. <br /> L6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period,the presaturated holes were found to intact and on January 23, / <br /> L 2007. <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on January 23, 2007 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed for each <br /> Lhole.The last half an hour of the four hour tests was observed by Mr. Ted Tasioplousos,Registered <br /> Environmental Health Inspector, EHD. flu <br /> 4 <br /> L 8 .,04 <br /> L <br />