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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 Ms. LeRoy and indicates a percolation rate for the hole based on the <br /> final water drop observed. <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 18 and 42 inches; a satisfactory percolation <br /> 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 <br /> 4/13/26 2.23 1.54 1 hr. <br /> Shallow Test perc. 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. <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 near the proposed septic disposal area for the new home have demonstrated <br /> a satisfactory percolation rate for the use of a septic system in accordance with the <br /> requirements of the San Joaquin County Environmental Health Department. The <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 1.0 and 5.0 min/in encountered in the test <br /> hole, 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 58 feet, no <br /> modification to the proposed septic system should be necessary to comply with this <br /> requirement. <br /> LOGE 2619 Page 7 <br />