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N� �5 The soil in the boring was considerably sandier than would be anticipated based on the Soil Survey data reviewed. Fine sand was encountered to a depth of 1.5 feet, followed 3� by sandy clay to 2.0 feet, followed by very fine to coarse sand to the full depth of the boring. The log for the soil boring is presented in Plate 10. Discussion of Soil Lithology Based on the soils observed in the boring, there appears to be good potential for percolation. Sandy soils generally have a much greater potential for percolation than (5-.46 fine-grained or cemented soils_ However, a percolation test is the only accepted method for determining the suitability of the soils for a septic disposal area. Percolation test results are discussed in the following section. Percolation Test One shallow percolation test was conducted on the Site; the shallow soil boring zs discussed above was used for the percolation test hole (Plate 9). Percolation test � procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Hole After the boring was advanced by hand auger and the soils logged, the test hole was completed for the percolation test. Approximately 2 inches of pea gravel were placed in the bottom of the 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. Live Oak presaturated the percolation test hole approximately 24 hours prior to the percolation test. The 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 percolation test hole was found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation test for the boring on January 29, 2014. Due to initial percolation rates observed, a one-hour test was selected. Water level measurements were taken every ten minutes during this one-hour period. Michael Escotto, Senior Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department, observed 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 on the data sheet in decimal feet. When necessary after measuring the water level, the hole was refilled with water to an approximate level of six inches above the bottom of the hole. LOGE 1402 Page 7