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Percolation Test <br /> A shallow and deep percolation test was conducted in the proposed septic disposal <br /> area of the Site. The soil borings discussed above were used for the percolation <br /> testing. Percolation test procedures conformed to San Joaquin County Environmental <br /> Health Department policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> After the borings were advanced by hand auger and the soil logged, the test holes were <br /> completed for the percolation testing. Approximately two inches of pea gravel were <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. 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 deep hole was <br /> found to be intact and dry; standing water was observed in the shallow hole. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation test for the borings on June 2, 2020. Due the soil <br /> type observed, a four-hour test was selected. Water level measurements were taken <br /> every 30 minutes during the four-hour period. The last 30 minutes of the test were <br /> observed by Daria Afonskaia, Registered Environmental Health Specialist at the San <br /> 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 hole was refilled with water <br /> to facilitate continued percolation. <br /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Ms. Afonskaia and indicates a percolation rate for each hole based on <br /> the least water drop observed. <br /> LOGE 20-20 Page 7 <br />