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i <br /> L <br /> L March 22,2005 <br /> NOA Project Number: E04132A <br /> ` 6.0 PERCOLATION TEST INFORMATION <br /> L6.1 Percolation Test Locations <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 /> L 6.2 Number of Percolation Tests <br /> VOne shallow percolation test and one deep percolation test was conducted on each parcel of the <br /> Site, for a total of two shallow and two deep percolation tests. <br /> L 6.3 Boring Preparation and Presaturation <br /> Two shallow soil borings were advanced on the Site with a four inch hand auger on Sunday March <br /> L 20,2005. The deep soil boring on parcel 181-090-11 was advanced on March 17,2005.The deep <br /> soil boring on parcel 181-090-02 was advanced on February 1,2005. <br /> A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> 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 backfilled in the annular space. <br /> Presaturation of the percolation test holes occurred on Sunday March 20,2005. The depth of water <br /> L used to pre-soak was 12 inches above the bottom of the boring. <br /> 6.4 Condition of Borings After Presaturation <br /> L After the 24-hour soak period, the presaturated holes were found to be intact and dry on March 21, <br /> 2005. <br /> 6.5 Percolation Test Procedure <br /> )r. Percolation tests were conducted for the borings on March 21, 2005 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed for each <br /> hole. The final half-hour of each four-hour percolation test was observed by Mr. Michael Escotto, <br /> Senior Registered Environmental Health Inspector, EHD. <br /> L <br /> L <br /> 9 <br /> 6 <br />