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rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than <br /> or equal to 60 min/in drop. For the Site to utilize a standard septic system, one <br /> percolation test must demonstrate a satisfactory percolation rate within the proposed <br /> 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, Satisfactory perc. <br /> 4/17/2023 3.23 2.69 1 hr. <br /> rate' <br /> Shallow Test <br /> P2, Satisfactory perc. <br /> 4/17/2023 3.39 2.69 1 hr. <br /> rate' <br /> Shallow Test <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. <br /> 1 Per San Joaquin County Environmental Health Department, a rate between 1.0 and 5.0 min/in requires a <br /> 20-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 on both proposed parcels of the Site have demonstrated satisfactory <br /> percolation rates for the use of standard septic systems in accordance with the <br /> requirements of the San Joaquin County Environmental Health Department. Each <br /> percolation test is considered representative of soils within a 100-foot radius of the test <br /> location. <br /> Because of the percolation rates between 1.0 and 5.0 min/in encountered in the test <br /> holes, the San Joaquin County Environmental Health Department will require a 20-foot <br /> separation from the bottom of the dispersal system to ground water, unless mitigated by <br /> system design or enhancement. Given the estimated depth to water of 75 to 85 feet, no <br /> modification to standard systems should be necessary to meet this requirement. <br /> Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater <br /> Treatment Systems Standards (2017) where applicable. In this area, systems utilizing <br /> leach lines and sumps are typically installed. <br /> LOGE 2307 Page 7 <br />