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Preparation and Presaturation of Percolation Test Holes <br /> After the boring was advanced by hand auger and the soil logged, the test hole was <br /> completed for the percolation testing. Approximately two inches of pea gravel were <br /> placed in the bottom of the 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 hole approximately 24 hours prior to the <br /> percolation testing. The 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 hole was found to <br /> be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation test for the boring on April 28, 2026. Percolation <br /> test procedures conformed to San Joaquin County Environmental Health Department <br /> policy. Due to the soil type observed, a standard four-hour test was selected. Water <br /> level measurements were taken every 30 minutes during this four-hour period. Sastina <br /> Thammavongsa, Registered Environmental Health Specialist at the San Joaquin <br /> County Environmental Health Department, observed the final 30 minutes of the <br /> percolation 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 /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Ms. Thammavongsa and indicates a percolation rate for the hole based <br /> on 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 18 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. <br /> Details and results of the percolation testing are summarized in the following table. <br /> LOGE 2620 Page 6 <br />