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Details and results of the percolation testing are summarized in the following table. Table 2. Percolation Test Summary Test No., Percolation Test Percolation Rate Test Duration Comments Date Tested Depth (ft.) (minutes/inch) (see notes) P1 2/6/26 2.20 27.8 4 hr. erc. rate'p Shallow Test erc. rate Note: A satisfactory percolation rate for a "shallow"test is greater than 1 but less than or equal to 60 minutes per inch. 1 Per San Joaquin County Environmental Health Department, a rate between 5.0 and 30.0 min/in requires an 8-foot separation between the bottom of dispersal system and ground water, or mitigation by system design or enhancement. Discussion of Percolation Test Results The soils near the proposed septic disposal area for the new modular home have demonstrated a satisfactory percolation rate for the use of a septic system in accordance with the requirements of the San Joaquin County Environmental Health Department. The percolation test is considered representative of soils within a 100-foot radius of the test location. Because of the percolation rate between 5.0 and 30.0 min/in encountered in the test hole, the San Joaquin County Environmental Health Department will require an eight- foot separation from the bottom of the dispersal system to ground water, unless mitigated by system design or enhancement. Live Oak encountered first ground water at 11.25 feet; consequently, it is anticipated that the San Joaquin County Environmental Health Department will require the septic leach field be installed to a maximum depth of 3.25 feet below ground surface. Discussion of Septic System Sizing Septic system construction should follow the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where applicable. In this area, only shallow septic systems utilizing leach lines or filter beds are permitted. LOGE 2606 Page 7