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Bir; Road Facility Page 6 of 13 <br /> Project Number: E07183A <br /> E November 30, 2007 <br /> FI <br /> 1 <br /> results. Generally speaking, coarser-grained soils have much greater potential for percolation <br /> t than fine-grained or cemented soils. <br /> i <br /> I.6 Percolation Test Information <br /> I.6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is includedoPlate n the <br /> rlappendix of this report. <br /> F! I.6. ber of Percolation Tests <br /> One shallow percolation test was conducted on roe for a total of one shallow percolation <br /> P property rtY <br /> F1 <br /> test. <br /> I.6.3 Boring Preparation and Presaturation <br /> One shallow percolation test hole was drilled on Site on November 19, 2007 using a hand / <br /> auger. <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 <br /> hejbottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea <br /> gravel"was then used to backfill in the annular space. <br /> I j <br /> Presaturation of the percolation test holes occurred approximately 24 hours prior to the <br /> percolation test. The depth of water used to pre-soak was 12 inches above the bottom of the <br /> j boring. <br /> F1I.6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period, the presaturated holes were found to be intact and dry on <br /> F1 November 20, 2006. I <br /> I.6.5 Percolation Test Procedure <br /> F1 � <br /> Percolation tests were conducted for the borings on November 20, 2007 in accord ce with the <br /> requirements of the EHD. A percolation tests with a duration of fo ours wa rmed for <br /> Fi each hole. The last half an hour of the test was observed by . Ted'Tasiopoulos, Re ' tered <br /> Environmental Health Specialist, EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference point on <br /> the PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All <br /> tabulated values on the field data sheet (append x) are in decimal feet. After water drop was / <br /> observed, the holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) <br /> H '00,04 <br /> n902 Industrial Way•Lodi,CA 95240.209.367.3701 ■Fax 209.369.4228 62007 Neil 0.Anderson&Associates,Inc <br />