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The soil in the boring was similar to that described by the Soil Survey. Sandy silt was encountered to 2.5 feet below ground surface, followed by silty sand for the remaining depth of the hole. The log for the soil boring is presented in Plate 10. Discussion of Soil Lithology Based on the soil observed in the boring, there appears to be moderate potential for percolation in the test location. Sandy soils generally have a much greater potential for ' percolation than 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 A shallow percolation test was conducted on the homesite parcel of the Site. The soil boring discussed above was used for the percolation test hole (Plate 9). Percolation ,C6"• ti 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 soil logged, the soil boring was completed for the percolation test. Approximately one inch of pea gravel was 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 hole was found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation test for the boring on October 31, 2012. Due to initial percolation rates observed, a four-hour test was selected. Water level measurements were taken every 30 minutes during this four-hour period. The test was 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 1/100`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. LOGE 1221 Page 6