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JR2 Page 10 <br /> Consulting, Inc. November 18, 2008 <br /> Environmental- Engineering- Geology Project Number 2008021 <br /> 6. PERCOLATION TEST INFORMATION <br /> Site Map Showing Test Locations <br /> A site map is attached ee P1ate— <br /> Number of Percolation Tests <br /> A total of twopercolation tests where conducted on each proposal parcel for a total of four <br /> percolation tests. <br /> Borehole Preparation and Presoak <br /> Two shallow soil boreholes were advanced on the site with a hand auger on November 18, 2008 <br /> andtwodeep soil boreholes were advanced on the site with a Drill rig on November 18, 2008. <br /> ? 2-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"coarse sand" were placed in the <br /> bottom of the open soil borehole, then the PVC pipe was installed on top of the sand. "sand" <br /> i <br /> was then used to backfill in the annular space. <br /> Presaturation of the percolation test holes occurred 24 hours before each percolation test. The <br /> depth of water used to pre-soak was 12 inches above the bottom of the borehole. <br /> Condition of the test holes after pre-soak <br /> After the 24 hour pre-soak,the boreholes appeared dry and intact on November 19, 2008. <br /> JR SQUARED CONSULTING,INC. ENVIRONMENTAL-ENGINEERING•GEOLOGY <br /> ` 6532 MCNEIL COURT,VALLEY SPRINGS,CA 95252 PHONE(209)772.3841 -FAX(209)740-4303 <br />