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Lo <br /> February 3, 2005 <br /> NOA Project Number: E040143A <br /> ` 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> bw 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 /> One shallow percolation test were 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 boxings on parcels 1, 3 and 4 were advanced on the Site with a hand auger on December <br /> i 16, 2004. The soil boring on Parcel 2 was advanced on the Site with a hand auger on January 31, <br /> L 2005. <br /> L 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. Several feet <br /> Lof"pea gravel' were backfilled in the annular space. <br /> Presaturation of the percolation test hole P-4 occurred on January 11, 2005,hole P-3 was <br /> presaturated on Sunday January 23, 2005,hole P-1 was presaturated on January 24,2005 and hole P- <br /> 2 was presaturated on February 2,2005. The depth of water used to pre-soak was 12 inches above <br /> the bottom of the boring. <br /> L6.4 Condition of Borings After Presaturation <br /> L After the 24-hour soak period,the presaturated hole P-4 was found to be intact on January 12, 2005, <br /> P-3 was found to be intact on January 24, 2005,P-1 was found to be intact on January 25,2005 and <br /> P-2 was found to be intact on February 3,2005. All of the holes were found to be dry on the day of <br /> the percolation tests. <br /> L6.5 Percolation Test Procedure <br /> Percolation test was conducted for Parcel 4 on January 12, 2005,in accordance with the <br /> ` requirements of the EHD. A percolation test with a duration of one hour was performed for the <br /> hole. The entirety of the percolation test was observed by Ms. Lisa Medina,Registered <br /> Environmental Health Inspector,EHD. The percolation test for Parcel 3 was conducted on January <br /> 24, 2005, the entirety of the percolation test was observed by Mr. Mike Escotto,Registered <br /> Environmental Health Inspector,EHD. On January 25, 2005,a percolation test with a duration of <br /> Lone hour conducted on Parcel 1. The entirety of the one hour test was observed by Mr. Mike <br /> L9 <br /> 4AL <br />