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test is the only accepted method for determining the suitability of the soils for a septic disposal area. Percolation test results are discussed in the following section. Percolation Test A shallow percolation test was conducted on each proposed parcel of the Site. The soil borings discussed above were used for the percolation test holes. Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Holes After each boring was advanced by hand auger and the soil logged, the test holes were completed 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 the percolation test holes 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, both holes were found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation tests for the boring on April 17, 2023. Based on initial percolation rates observed, one-hour tests were selected. Water level measurements were taken every 10 minutes during the one-hour period. The last 30 minutes of each test were observed by Francisco Garcia Ruiz, Registered Environmental Health Specialist 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, each hole was refilled with water to a level of approximately six inches above the bottom of the hole. Percolation Test Results The completed percolation test forms are included in Appendix 3 of this report. The forms were signed by Mr. Garcia Ruiz and indicate a percolation rate for each hole based on the final water drop observed. Per San Joaquin County Environmental Health Department's definition, a shallow percolation test hole has a depth between 18 and 42 inches; a satisfactory percolation LOGE 2307 Page 6