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• 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 each proposed parcel of the Site. The soil <br /> borings discussed above were used for the percolation test holes (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 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 2.0-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 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, the holes were found <br /> • to be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation tests for the borings January 19, 2018. Due to <br /> rapid percolation rates observed, one-hour tests were selected. Water level <br /> measurements were taken every 10 minutes during this one-hour period. The tests <br /> were observed by Jeffery Wong, Senior Registered Environmental Health Specialist at <br /> 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 holes were refilled with water <br /> to a level of six inches or more above the bottom of the hole. <br /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Mr. Wong and indicates the percolation rate for each hole based on the <br /> final water drop observed. <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation <br /> LOGE 1801 Page 6 <br />