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Preparation and Presaturation of Percolation Test Holes After the borings were advanced and the soil logged, Live Oak completed the test holes for the percolation testing. Approximately two inches of pea gravel were placed in the bottom of each open soil boring, followed by a 2.0-inch diameter PVC pipe with perforations on the bottom. Pea gravel was then used to backfill a few inches of the annular space. Live Oak presaturated each percolation test hole approximately 24 hours prior to the percolation testing. Each hole was filled with water to a height of 12 inches above the bottom of the boring for the presaturation. On the day of testing, each hole was found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation testing for the borings on September 3 through 25, 2020. Due to initial percolation rates observed, four-hour tests were selected for all but Parcel 1 . Water level measurements were taken every 30 minutes during the four-hour period. A one-hour test was selected for Parcel 1; water level measurements were taken every 10 minutes during the one-hour period. The last 30 minutes of each test were observed by Daria Afonskaia, Aaron Gooderham, Naseem Ahmed, or Michael Suszycki, Registered Environmental Health Specialists at the San Joaquin County Environmental Health Department. An electronic well sounder with a depth accuracy of 1/100th foot was utilized for the water level measurements. The water level was measured against a fixed reference point on the well casing. Measurements were recorded on the data sheet in decimal feet. When necessary after measuring the water level, the hole was refilled with water to facilitate continued percolation. Percolation Test Results The completed percolation test forms are included in Appendix 3 of this report. The forms were signed by the inspectors present and indicate percolation rates for each hole based on the least water drop observed. Per San Joaquin County Environmental Health Department's definition, a shallow percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than or equal to 60 min/in drop. For the Site to utilize a standard septic system, one percolation test must demonstrate a satisfactory percolation rate within 100 feet of the proposed septic system disposal field. LOGE 20-29 Page 7