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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. Garcia Ruiz, and indicates a percolation rates for the hole based on <br />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 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 hole must demonstrate a satisfactory percolation rate within 100 feet of <br />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 -S, <br />5/13/2021 3.42 3.33 1 hr. Satisfactory perc. <br />Shallow Test 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 />2 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 soil on the proposed homesite parcel of the Site has demonstrated a satisfactory <br />percolation rate for the use of standard septic systems 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 systems to ground water. Based on the <br />predicted depth to water of 32 to 33 feet, no modification to standard shallow systems <br />should be necessary. <br />LOGE 2124 Page 7 <br />