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Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be moderate potential for <br /> percolation in the test locations. Sandy soils generally have a much greater potential for (_5-t) <br /> percolation than fine-grained or cemented soils. However, a percolation test is the only <br /> accepted method for determining the suitability of the soils for a septic disposal area. <br /> Percolation test results are discussed in the following section. <br /> Percolation Test <br /> A shallow percolation test was conducted on the proposed homesite parcel. The soil <br /> boring discussed above was used for the percolation test hole (Plate 10). Percolation <br /> test procedures conformed to San Joaquin County Environmental Health Department <br /> policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> After the boring was advanced by hand auger and the soils logged, the test hole was <br /> completed for the percolation test. Approximately one inch of pea gravel was placed in <br /> the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe with <br /> perforations on the bottom. Pea gravel was then used to backfill a few inches of the <br /> annular space. l <br /> Live Oak presaturated the percolation test hole approximately 24 hours prior to the <br /> percolation test. The 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, the hole was found to f, <br /> be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation test for the boring on December 14, 2011. Due to <br /> soil conditions observed, a four-hour test was selected. Water level measurements <br /> were taken every half-hour during this four-hour period. The last half-hour of the test 5� <br /> was observed by Ted Tasiopoulos, Senior Registered Environmental Health Specialist <br /> 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 /> LOGE 1112 Page 6 <br />