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The soil in the boring was within the range of what would be anticipated based on the Soil Survey data reviewed. Sandy silt was encountered to approximately 2.5 feet below ground surface, followed by silty sand with clay 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 moderate potential for percolation. 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. One shallow percolation test was conducted on thete; the stlallow soil boring discussed above was used for the percolation test htile (Plate 2). I Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Holes 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 August 31, 2011. Due to soil conditions present, a four-hour test was selected. Water Level measurements were taken every half hour during this four-hour period. Ted Tasiopoulos, Senior Registered Environmental Health Specialist at the San Joaquin County Environmental Health l Department, observed the last half hour of the 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. LOGE 1123 Page 5