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rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than or equal to 60 min/in drop. A deep percolation test hole has a depth between 3.5 and 25 feet; a satisfactory percolation rate for a deep test is greater than or equal to 1 min/in but less than or equal to 30 min/in drop. For the Site to utilize a standard septic system, one percolation test hole (shallow or deep) must demonstrate a satisfactory percolation rate within the proposed septic system disposal field. 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-S, Insufficient perc. 4/27/2021 3.29 250 4 hr. Shallow Test rate* P1-D, Satisfactory 2/9/2021 6.31 27.8 4 hr. perc. Deep Test 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. Only one percolation test boring (shallow or deep) is required to pass for the property to be approved for a standard septic system. 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 a standard 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. Discussion of Septic System Sizing Septic system construction utilizing leach lines with seepage pits should follow the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where applicable. LOGE 2125 Page 7