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Percolation Test <br /> Two shallow percolation tests were conducted by Chesney in the proposed septic <br /> disposal area of the Site. The soil borings discussed above were used for the <br /> percolation test holes. <br /> Preparation and Presaturation of Percolation Test Holes <br /> As described in the Chesney report, after the borings were advanced by hand auger <br /> and the soil logged, the test holes were completed for the percolation testing. <br /> Approximately two inches of pea gravel were placed in the bottom of each open soil <br /> boring, followed by a 3.0-inch diameter PVC pipe with perforations on the bottom. <br /> Chesney presaturated the percolation test holes approximately 24 hours prior to the <br /> percolation testing. 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, the holes were found <br /> to be intact and dry. <br /> Percolation Test Procedure <br /> Chesney conducted the percolation testing for the borings on January 31, 2019. To <br /> ensure maximum soil saturation, four-hour tests were selected. Water level <br /> measurements were taken every 30 minutes during this four-hour period. The last 30 <br /> minutes of the test were observed by Ted Tasiopoulos, Registered Environmental <br /> Health Specialist at the San Joaquin County Environmental Health Department. <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. Tasiopoulos and indicates a percolation rate for each hole based on <br /> the 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 /> rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than <br /> or equal to 60 min/in drop. For the Site to utilize a standard septic system, one <br /> percolation test must demonstrate a satisfactory percolation rate within the proposed <br /> septic system disposal field. Details and results of the percolation test are summarized <br /> in the following table. <br /> LOGE 20-19 Page 7 <br />