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Table 1. Percolation Test Summary Test No., Percolation Test Percolation Rate Test Duration Comments Date Tested Depth (ft.) (minutes/inch) (see notes) P1, Insufficient 4/20/2021 3.50 250 4 hr. Shallow Test percolation rate P1, 4/20/2021 19.34 2.4 1 hr. Satisfactory 2 Deep Test percolation rate Note: A satisfactory percolation rate for a "shallow" test is greater than 1 but less than or equal to 60 minutes per inch. A satisfactory percolation rate for a "deep" test is greater than 1 but less than or equal to 30 minutes per inch. 1 Only one percolation test (shallow or deep) must demonstrate a satisfactory percolation rate for the area to be considered acceptable for a standard septic system. 2 Per San Joaquin County Environmental Health Department, a rate between 1.0 and 5.0 min/in requires a 20-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 within the proposed sewage disposal area of the Site have demonstrated a satisfactory percolation rate for the use of standard septic systems in accordance with the requirements of the San Joaquin County Environmental Health Department. This percolation test is considered representative of soils within a 100-foot radius of the test location. Because of the percolation rate between 1.0 and 5.0 min/in encountered in the test hole, the San Joaquin County Environmental Health Department will require a 20-foot separation from the bottom of the dispersal system to ground water. Ground water is anticipated to be encountered over 100 feet below ground surface at the Site; consequently, no modifications to standard septic systems should be required. Discussion of Septic System Sizing Septic system construction utilizing leach lines and seepage pits should follow the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where applicable. LOGE 2119 Page 4