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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-S Satisfactory <br /> 3/25/2016 3.30 14.7 4 hr. <br /> Shallow Test perc. rate <br /> P1-D Satisfactory <br /> 3/25/2016 11.50 <3.1 4 hr. 2 <br /> Deep Test perc. rate <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. Only one test (shallow or <br /> deep) per location is required to pass for the location to be considered acceptable. <br /> 1 Per San Joaquin County Environmental Health Department, a rate between 5.0 and 30.0 min/in requires an <br /> 8' separation between the bottom of dispersal system and ground water, or mitigation by system design or <br /> enhancement. <br /> 2 Per San Joaquin County Environmental Health Department, a rate between 1.0 and 5.0 min/in requires a 20' <br /> separation between the bottom of dispersal system and ground water, or mitigation by system design or <br /> enhancement. <br /> Discussion of Percolation Test Results <br /> The soils within the sewage disposal area 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. <br /> Because of the percolation rate between 1.0 and 5.0 encountered in the deep test hole, <br /> the San Joaquin County Environmental Health Department will require a 20-foot <br /> separation from the bottom of the dispersal system to ground water (see Table 2). <br /> Ground water is anticipated to be encountered approximately 47 to 49 feet below <br /> ground surface at the Site; however, the 1983/1999 high ground-water level was 35 feet <br /> below ground surface. <br /> The Site is located within a "shallow only" septic zone per current San Joaquin County <br /> Environmental Health Department policy. The existing church septic system, installed <br /> in 2014, utilizes a single leach line only. Future construction also should be restricted to <br /> shallow systems. <br /> Discussion of Septic System Sizing <br /> Septic system construction utilizing leach lines or a filter bed should follow the San <br /> Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where <br /> applicable. It is anticipated that over 300 feet of leach line will be added to the existing_ <br /> church system. <br /> LOGE 1917 Page 8 <br />