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% ..� <br /> LFebruary 16, 2005 <br /> NOA Project Number: E040149A <br /> L 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> µ` A site map indicating the locations of the percolation test holes is included as Plate 1 of this report. <br /> L6.2 Number of Percolation Tests <br /> L One shallow percolation test was conducted on each proposed parcel of the Site, for a total of four <br /> shallow percolation tests. <br /> 6.3 Boring Preparation and Presaturation <br /> The soil borings on Parcels 1,2,3 and 4 were advanced on the Site with a hand auger on January 27, <br /> L 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 /> Lbottom of the open soil boring, then the PVC pipe was installed on top of the gravel. Several feet <br /> of"pea gravel' were backfilled in the annular space. <br /> LPresaturation of the percolation test holes on Parcels 3 and 4 occurred on February 9, 2005;and <br /> presaturation of the test holes on Parcels 1 and 2 occurred on February 10, 2005. The depth of <br /> water 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 February 10 and <br /> 11,2005. All of the holes were found to be dry, on the day of testing. <br /> L 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on Parcels 3 and 4 on February 10, 2005 in <br /> accordance with the requirements of the EHD. A percolation test with a duration of one hour was <br /> L performed for each hole. The entirety of the percolation test was observed by Ms. Lisa Medina, <br /> Registered Environmental Health Inspector, EHD.Percolation tests were conducted for the borings <br /> L on Parcels 1 and 2 on February 11,2005 in accordance with the requirements of the EHD. A <br /> percolation test with a duration of four hours was performed for each hole. The final half and hour <br /> of the percolation test was observed by Mr. Ted Tasiopoulos, Registered Environmental Health <br /> LInspector, EHD. <br /> L <br /> L g .-44 <br /> L <br />