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LOGE 1813: Ferreira Percolation Test March 7, 2018 Percolation Test Procedure Page 2 Live Oak conducted the percolation test for the boring on March 6, 2018. Due to the rapid initial percolation rate observed, a one-hour test was selected. Water level measurements were taken every ten minutes during this one-hour period. Naseem Ahmed, Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department, observed the percolation test. An electronic well sounder with a depth accuracy of 1/100`h 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 hole was 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 attached to this letter. The form was signed by Mr. Ahmed 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. Details and results of the percolation test are summarized in the following table. Table 1. Percolation Test Summary Test No., Percolation Percolation Test Duration Comments Date Tested Test Rate (see note) Depth (ft.) (minutes/inch) P1, /F/1 R in 1 1 hr Satisfactory Shallow Test perc. rate Note: A satisfactory percolation rate for a "shallow" test is greater than or equal to 1 min/in but less than or equal to 60 min/in. The soils on 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. Although the percolation rate observed is on the far low end of the acceptable range, it is the opinion of Live Oak that, because of the silty soil observed, a standard septic system is appropriate.