Laserfiche WebLink
septic system disposal field. Details and results of the percolation test are summarized <br /> 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 perc. <br /> 10/4/2018 3.46 2.25 1 hr. <br /> rate <br /> Shallow Test <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 within the proposed sewage disposal area of the Site have demonstrated a <br /> satisfactory percolation rate for the use of a standard septic system in accordance with <br /> the requirements of the San Joaquin County Environmental Health Department. <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. Ground water is <br /> anticipated to be encountered approximately 35 to 40 feet below ground surface at the <br /> Site; consequently, no modifications to shallow septic systems should be necessary as <br /> a result of this requirement. <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. <br /> LOGE 2106 Page 7 <br />