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but less than or equal to 30 min/in drop. For the Site to utilize a standard septic system, <br /> one percolation test (shallow or deep) must demonstrate a satisfactory percolation rate <br /> within the proposed septic system disposal field. <br /> Details and results of the percolation testing are summarized in the following table. <br /> Table 2. Percolation Test Summary <br /> Test No., Percolation Test Percolation Rate Test Duration Comments <br /> Date Tested Depth (ft.) (minutes/inch) (see notes) <br /> P1, <br /> Insufficient <br /> 8/5/2020 3.42 250 4 hr. percolation rate* <br /> Shallow Test <br /> P1, <br /> 8/5/2020 6.16 10 4 hr. Satisfactory � <br /> Deep Test percolation rate <br /> Note: A satisfactory percolation rate for a "shallow" test is greater than 1 but less than or equal to 60 minutes per <br /> inch. A satisfactory percolation rate for a "deep" test is greater than 1 but less than or equal to 30 minutes <br /> per inch. <br /> Only one test (shallow or deep) is required to pass for the area to be considered suitable for standard septic <br /> systems. <br /> 1 Per San Joaquin County Environmental Health Department, a rate between 5.0 and 30.0 min/in requires an <br /> eight-foot separation between the bottom of dispersal system and ground water, or mitigation by system <br /> design or enhancement. <br /> Discussion of Percolation Test Results <br /> The soils within the proposed sewage disposal area of the Site have demonstrated a <br /> satisfactory percolation rate for the use of a standard septic system in accordance with <br /> the requirements of the San Joaquin County Environmental Health Department. This <br /> percolation test is considered representative of soils within a 100-foot radius of the test <br /> location. <br /> Because of the percolation rate between 5.0 and 30.0 min/in encountered in the test <br /> hole, the San Joaquin County Environmental Health Department will require an eight- <br /> foot separation from the bottom of the dispersal system to ground water. Ground water <br /> is anticipated to be encountered approximately 103 to 130 feet below ground surface at <br /> the Site; consequently, no modifications to standard septic systems should be required. <br /> Discussion of Septic System Sizing <br /> Septic system construction utilizing leach lines and seepage pits should follow the San <br /> Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where <br /> applicable. <br /> LOGE 20-31 Page 7 <br />