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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 shallow soil zone at the test location. Sandy soils generally have a <br /> much greater potential for percolation than fine-grained or cemented soils. However, a <br /> percolation test is the only accepted method for determining the suitability of the soils <br /> for a septic disposal area. Percolation test results are discussed in the following <br /> section. <br /> Percolation Test <br /> A shallow percolation test was conducted on the proposed homesite parcel of the Site. <br /> The soil boring discussed above was used for the percolation test hole (Plate 10). <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 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 the open soil boring, followed by a 2.0-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. <br /> Live Oak presaturated the percolation test hole approximately 24 hours prior to the <br /> percolation testing. 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 <br /> be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation test for the boring on November 2, 2016. Due to <br /> soil conditions observed, a one-hour test was selected. Water level measurements <br /> were taken every 10 minutes during this one-hour period. The test was observed by <br /> Ted Tasiopoulos, Senior Registered Environmental Health Specialist at the San Joaquin <br /> 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 an approximate level of six inches above the bottom of the hole. <br /> • <br /> LOGE 1626 Page 5 <br />