SR0081206 SSNL - Laserfiche WebLink

Home Browse Search

Table 2. Percolation Test Summary Test No., Percolation Test Percolation Rate Test Duration Comments Date Tested Depth (ft.) (minutes/inch) (see notes) Test Hole#1 3/26/2010 3.3 150 4 hr. Failed* Shallow Test Test Hole#2 3/26/2010 14.7 27.2 4 hr. Satisfactory perc. rate Shallow Test Note: A satisfactory percolation rate for a "shallow" test is greater than 1 but less than or equal to 60 minutes per inch. A satisfactory percolation rate for a "deep"test is greater than 1 but less than or equal to 30 minutes per inch. * Only one test (shallow or deep) is required to pass for the Site to be considered adequate for a standard septic system. 1 Per San Joaquin County Environmental Health Department, a rate between 5.0 and 30.0 min/in requires an eight-foot separation between the bottom of dispersal system and ground water, or mitigation by system design or enhancement. Discussion of Percolation Test Results The soils within the proposed sewage disposal area of the Site have demonstrated a satisfactory percolation rate for the use of a standard septic system in accordance with the requirements of the San Joaquin County Environmental Health Department. Because of the percolation rate between 5.0 and 30 min/in encountered in the deep test hole, the San Joaquin County Environmental Health Department will require an eight- foot separation from the bottom of the dispersal system to ground water. Ground water is anticipated to be encountered approximately 56 to 59 feet below ground surface at the Site; consequently, no modifications to standard septic systems should be required. Discussion of Septic System Sizing Septic system construction utilizing leach lines and seepage pits should follow the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) where applicable. LOGE 1939 Page 8