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Discussion of Soil Lithology <br /> Based on the soils observed in the borings, there appears to be moderate to good <br /> potential for percolation. Sandy soils generally have a much greater potential for <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 /> Three shallow percolation tests were conducted on the Site; the shallow soil borings <br /> discussed above were used for the percolation test holes (Plate 9). Percolation test _ 1, <br /> procedures conformed to San Joaquin County Environmental Health 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 2 inches of pea gravel were <br /> 5withplaced in the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe �� -Z'- <br /> with <br /> perforations on the bottom. Pea gravel was then used to backfill a few inches of <br /> the annular space. <br /> Live Oak presaturated each percolation test hole approximately 24 hours prior to the <br /> percolation testing. 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, each percolation test <br /> hole was found to be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation tests for the borings on May 5 and 7, 2015. Due to <br /> initial percolation rates observed, four-hour tests were selected. Water level <br /> measurements were taken every half-hour during this four-hour period. Michael <br /> Escotto, Senior Registered Environmental Health Specialist at the San Joaquin County <br /> 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, each hole was refilled with water <br /> to an approximate level of six inches above the bottom of the hole. <br /> LOGE 1508 Page 7 <br />