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LOGE 1311: Oak Farm Winery Percolation Test Page 2 May 31.2013 PQrcolatjonjQ_sj Procedure Live Oak conducted the percolation test for the boring on May 29, 2013. Due to soil conditions observed, a four-hour test was selected. Water level measurements were taken every half- hour during this four-hour period. Michael Escotto, Senior Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department, observed the last half- hour of the test. An electronic well sounder with a depth accuracy of 1/100`"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 an 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 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. Escotto 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 less than or equal to 60 minutes per inch(minrin) 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 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) Pt, Satisfactory 5/29/13 3.30 <4.8 4 hr. pare. rate Shallow Test NOW A satisfactory percolation rate for a-s_h�itftnisiawtfian or equal to 60 minules per inch. Discussion of Percolation Test Results The soils within the 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.