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L <br /> LMarch 25,2005 <br /> NOA Project Number: E05005A <br /> L 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 /> 6.2 Number of Percolation Tests <br /> Q One shallow and one deep percolation test were conducted on the Site, for a total of one shallow <br /> ` and one deep percolation test. <br /> 6.3 Boring Preparation and Presaturation <br /> A total of one shallow and one deep soil borings were advanced on the Site with a truck-mounted <br /> L deep rock augur rig on March 9, 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. 'Tea Gravel' <br /> was then used to backfill in the annular space. <br /> LPresaturation of the percolation test holes occurred on Sunday March 13 2005. The depth of water <br /> used to pre-soak was 12 inches above the bottom of the boring. <br /> L6.4 Condition of Borings After Presaturation <br /> LAfter the 24-hour soak period,the presaturated holes were found to be intact on March 14, 2005. <br /> Both of the percolation test holes contained water on the bottom. <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on March 14, 2005 in accordance with the <br /> L requirements of the EHD. A percolation test with a duration of four hours was performed for each <br /> hole. The last half an hour was observed by Ms. Lisa Medina, Senior Registered Environmental <br /> Health Inspector,EHD. <br /> I <br /> V <br /> L <br /> IL <br /> + 7 <br /> L -,44 <br /> L <br />