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Discussion of Soil Lithology <br /> Based on the soils observed in the borings, there appears to be some potential for <br /> percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> test results are discussed in the following section. <br /> Percolation Test <br /> A total of 11 percolation tests (shallow and deep) were conducted on the Site; the soil �L <br /> borings discussed above were used for the percolation test holes (Plate 9). 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 borings were advanced by hand auger and the soils logged, the test holes <br /> were completed for the percolation test. 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. The holes were filled with water to a height of 12 inches above the <br /> bottom of the boring for the presaturation. On the day of testing, each hole was found <br /> to be intact. The deep holes were found to be dry; several of the shallow holes �l�•�J <br /> remained wet. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation tests for the borings on February 7, 13, 14, and 28, <br /> and April 19, 2013. Due to soil conditions observed, four-hour tests were selected. <br /> Water level measurements were taken every half-hour during this four-hour period. <br /> Michael Escotto, Senior Registered Environmental Health Specialist at the San Joaquin <br /> County Environmental Health Department, observed the last half-hour of each test. <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 approximately six inches above the bottom of the hole. <br /> LOGE 1217 Page 7 <br />