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L <br /> LJuly 28, 2006 <br /> NOA Project Number: E06068A <br /> Page 8 <br /> 6.0 PERCOLATION TEST INFORMATION <br /> v/6.1 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 /> LOne shallow percolation test was conducted on the site for a total of one percolation test. <br /> 6.3 Boring Preparation and Presaturation <br /> L A total of one shallow boring was drilled on the Site. The boring was excavated on the site with a <br /> hand augur on June 12, 2006. <br /> 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 /> Presaturation of the percolation test hole occurred 24 hours prior to the percolation tests. The depth <br /> of water used to pre-soak was 12 inches above the bottom of the borings. <br /> X6.4 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 /> 6.5 Percolation Test Procedure <br /> L Percolation tests were conducted for the shallow boring on June 13, 2006 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed for the <br /> hole. The last half an hour was observed by Ms. Lisa Medina, Senior Registered Environmental <br /> ` Health Inspector, EHD. <br /> L <br /> L <br /> l <br /> L8 <br />