Laserfiche WebLink
An electronic well sounder with a depth accuracy of 1/100th foot was utilized for the <br /> water level measurements. The water level was measured against a fixed reference <br /> point on the well casing. Measurements were recorded on the data sheet in decimal <br /> feet. When necessary after measuring the water level, the shallow hole was refilled with <br /> water to a level of approximately six inches above the bottom of the hole; the deep hole <br /> is allowed to be filled with water to a maximum of three feet above the most permeable <br /> soil stratum selected, per San Joaquin County Environmental Health Department policy <br /> (personal communication with Michael Kith, REHS, Program Coordinator, August 6, <br /> 2020). <br /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Mr. Ahmed and indicates a percolation rate for each hole based on the <br /> least water drop observed. <br /> Per San Joaquin County Environmental Health Department's definition, a shallow <br /> percolation test hole has a depth between 36 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. A deep percolation test hole has a depth between 3.5 and <br /> 25 feet; a satisfactory percolation rate for a deep test is greater than or equal to 1 min/in <br /> but less than or equal to 30 min/in drop. For the Site to utilize a standard septic system, <br /> one percolation test hole (shallow or deep) must demonstrate a satisfactory percolation <br /> rate within 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 /> Pi_S, <br /> 9/10/2020 3.44 50 4 hr. Satisfactory perc. <br /> Shallow Test rate <br /> P1-D, <br /> 9/10/2020 8.14 4.55 4 hr. Satisfactory perc. <br /> Deep 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 /> 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 /> LOGE 20-40 Page 7 <br />