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F `-January 12,2007 NOA Project Number: E06157A results. Generally speaking, coarser-grained soils have much greater potential for percolation than fine-grained or cemented soils. /6.0 PERCOLATION TEST INFORMATION Fil /6.1 Percolation Test Locations r" A site map indicating the location of the percolation test holes is included as Plate 1 in the appendix of this report. /6.2 Number of Percolation Tests E' One shallow and one deep percolation test were conducted on the site for a total of two percolation tests on the site.These tests were done in the proposed septic disposal area for the future residence. /6.3 Boring Preparation and Presaturation One shallow and one deep soil boring were advanced on the site with a truck mounted deep rock auger rig on December 11, 2006. A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of water in the percolation test boring. Approximately 2 inches of pea gravel" were placed in the bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel' was then used to backfill in the annular space. Presaturation of the percolation test holes occurred approximately 24 hours before the percolation Ftests. The depth of water used to pre-soak was 12 inches above the bottom of the borings. 1/6.4 Condition of Borings After Presaturation Fi After the 24-hour soakpr , e p eodthe resaturated holes were found to be intact without water. /6.5 Percolation Test Procedure The percolation tests were conducted for the borings on December 12, 2006 in accordance with the F! requirements of the EHD. A percolation test with a duration of four hours was performed for each hole. The last half an hour of the tests was observed by Ms. Lisa Medina, Senior Registered Environmental Health Specialist, EHD. �. F C' F] 6 { !