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Percolation Test A shallow percolation test was conducted on each proposed parcel of the Site. The soil borings discussed above were used for the percolation test holes (Plate 9). Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Hole After the borings were advanced by hand auger and the soils logged, each soil boring was completed for the percolation test. Approximately one inch of pea gravel was placed in the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe with perforations on the bottom. Pea gravel was then used to backfill a few inches of the annular space. 3) Live Oak presaturated the percolation test holes approximately 24 hours prior to the percolation tests. Each hole was filled with water to a height of 12 inches above the bottom of the boring for the presaturation. On the day of testing, the holes were found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation tests for the borings on January 28, 2014. Due to initial percolation rates observed, four-hour tests were selected. Water level measurements were taken every 30 minutes during this four-hour period. The last 30 minutes of each test were observed by Michael Escotto, Senior 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 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 included in Appendix 3 of this report. The form 6' was signed by Mr. Escotto and indicates the percolation rate for each 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 (min/in) drop. A deep percolation test hole has a depth greater than 3.5 up to 25 feet; a satisfactory �' LOGE 1401 Page 6