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measurements were taken every 10 minutes during the one-hour period. The last 10 minutes of the test were observed by Sukhreet Kaur, Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department. An electronic well sounder with a depth accuracy of 1/100th foot was utilized for the water level measurements. The water level was measured against a fixed reference point on the well casing. Measurements were recorded on the data sheet in decimal feet. When necessary after measuring the water level, the holes were refilled with water to a level of six inches or more above the bottom of the hole. Percolation Test Results The completed percolation test form is included in Appendix 3 of this report. The form was signed by Ms. Kaur and indicates a percolation rate for the hole based on the final water drop observed. Per San Joaquin County Environmental Health Department's definition, a shallow percolation test hole has a depth between 36 and 42 inches; a satisfactory percolation rate for a shallow test is greater than or equal to 1 minute per inch (min/in) but less than or equal to 60 min/in drop. For the Site to utilize a standard septic system, one percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field. Details and results of the percolation testing are summarized in the following table. Table 2. Percolation Test Summary Test No., Percolation Test Percolation Rate Test Duration Comments Date Tested Depth (ft.) (minutes/inch) (see notes) P1, 4/15/2019 3.08 4.16 1 hr. Satisfactor�r pert. 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. 1 Per San Joaquin County Environmental Health Department, a rate between 1.0 and 5.0 min/in requires a 20' 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 1.0 and 5.0 encountered in the test hole, the San Joaquin County Environmental Health Department will require a 20-foot separation LOGE 1913 Page 7