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• Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be good potential for <br /> percolation in the shallow soil zone at test location P1, and moderate potential for <br /> percolation in the shallow soil zones at test locations P2 and P3. Sandy soils generally <br /> have a much greater potential for percolation than fine-grained or cemented soils. <br /> However, a percolation test is the only accepted method for determining the suitability of <br /> the soils for a septic disposal area. Percolation test results are discussed in the <br /> following section. <br /> Percolation Test <br /> A shallow percolation test was conducted on each proposed parcel of the Site. The soil <br /> borings discussed above were used for the percolation test holes (Plate 11). <br /> Percolation test procedures conformed to San Joaquin County Environmental Health <br /> Department policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> After the borings were advanced by hand auger and the soils logged, the test holes <br /> were completed for the percolation tests. Approximately one inch of pea gravel was <br /> placed in the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe <br /> • with perforations on the bottom. Pea gravel was then used to backfill a few inches of <br /> the annular space. <br /> Live Oak presaturated the percolation test holes approximately 24 hours prior to the <br /> percolation tests. Each hole was filled with water to a height of 12 inches above the <br /> bottom of the boring for the presaturation. On the day of testing, all three holes were <br /> found to be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation tests for the borings on October 29, 2015. Due to <br /> soil conditions observed, four-hour tests were selected. Water level measurements <br /> were taken every 30 minutes during this four-hour period. The last half hour of each <br /> test was observed by Ted Tasiopoulos, Senior Registered Environmental Health <br /> Specialist at the San Joaquin County Environmental Health Department. <br /> An electronic well sounder with a depth accuracy of 1/100th foot was utilized for the <br /> water level measurements. The water level was measured against a fixed reference <br /> point on the well casing. Measurements were recorded on the data sheet in decimal <br /> feet. When necessary after measuring the water level, the hole was refilled with water <br /> to a level of six inches or more above the bottom of the hole. <br /> • <br /> LOGE 1523 Page 7 <br />