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Soil Borings On June 10 and 20, 2011, Live Oak excavated one shallow soil boring on each proposed parcel the Site (seven borings total) for the purpose of conducting percolation tests. The borings were four inches in diameter, with depths of 3.11, 3.20, 3.157 3.14, 3.05, 3.20, and 3.15 feet. They were excavated by hand auger. The locations of the borings are indicated on Plates 2 and 3. The soil in the borings was similar to that described above by the Soil Survey; clay with fine to coarse sand was observed to a depth of two feet below ground surface, followed by sandy silt with clay to the total depth of the borings. The logs for the soil borings are presented in Plates 10 and 11. Discussion of Soil Lithology Based on the soils observed in the borings, 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. Percolation Test One shallow percolation test was conducted on each parcel of the Site; the shallow soil borings discussed above were used for the percolation test holes (Plates 2 and 3). Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Holes After the borings were advanced by hand auger and the soils logged, the test holes were completed for the percolation tests. 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. Live Oak presaturated the percolation test holes approximately 24 hours prior to the percolation test. 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, all four holes were found to be intact and dry, Percolation Test Procedure Live Oak conducted the percolation tests for the borings on June 13 and 21, 2011. Due to silty soil conditions observed, four-hour tests were selected. Water level LOGE 1118 Page 6 _._............._._................................................................ .........................................................................................................................................