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• Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Mr. Tasiopoulos and indicates the percolation rate for each hole based <br /> on the final water drop observed. <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation <br /> rate for a shallow test is less than or equal to 60 minutes per inch (min/in) drop. For the <br /> Site to utilize a standard septic system, a percolation test must demonstrate a <br /> satisfactory percolation rate within the proposed septic system disposal field. <br /> Details and results of the percolation tests are summarized in the following table. <br /> Table 2. Percolation Test Summary <br /> Test No., Percolation Percolation Test Duration Comments <br /> Date Tested Test Rate (see notes) <br /> Depth (ft.) (minutes/inch) <br /> P1 Satisfactory <br /> 7-14-17 3.45 1.2 1 hr. perc. rate <br /> Shallow Test <br /> • P2 Satisfactory <br /> 7-14-17 3.33 1.6 1 hr. perc. rate <br /> Shallow Test <br /> Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. A satisfactory <br /> percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> *Only one test(shallow or deep) is required to pass per parcel for that parcel to utilize a standard septic system. <br /> Discussion of Percolation Test Results <br /> The soils within the percolation test areas have demonstrated satisfactory percolation <br /> rates for the use of septic systems utilizing leach lines or filter beds in accordance with <br /> the requirements of the San Joaquin County Environmental Health Department. Based <br /> on the percolation rates of 1.2 and 1.6 min/in, the San Joaquin County Environmental <br /> Health Department will require either a 20-foot separation from the bottom of the <br /> dispersal system to ground water, or mitigation of the rapid percolation rate by septic <br /> system design or enhancement. <br /> Discussion of Septic System Sizing <br /> Future septic system construction should follow the San Joaquin County On-Site <br /> Wastewater Disposal Standards (2016) where applicable. No new construction is <br /> anticipated. <br /> • <br /> LOGE 1718 Page 7 <br />