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and were excavated by hand auger (Table 2). The locations of the borings are <br /> indicated on Plate 8. <br /> The soils in the borings were similar to those described by the Soil Survey. Peat was <br /> encountered on Parcels 1, 2, and 3 to the full depth of the hole; sandy silt was <br /> encountered on Parcel 4 to the full depth of the hole. The logs for the soil borings are <br /> presented in Plates 9 and 10. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be moderate potential for <br /> percolation in the test location. Sandy soils generally have a much greater potential for <br /> percolation than fine-grained or cemented soils. However, a percolation test is the only <br /> accepted method for determining the suitability of the soils for a septic disposal area. <br /> Percolation test results are discussed in the following section. <br /> Percolation Test <br /> A shallow percolation test was conducted on each proposed numbered parcel of the <br /> Site. The shallow soil borings discussed above were used for the percolation test holes. <br /> Percolation test procedures conformed to San Joaquin County Environmental Health <br /> Department policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> After the borings were advanced by hand auger and the soil logged, the borings were <br /> completed for the percolation tests. Approximately one inch of pea gravel was placed in <br /> the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe with <br /> perforations on the bottom. Pea gravel was then used to backfill a few inches of the <br /> annular space. <br /> Live Oak presaturated the percolation test holes approximately 24 hours prior to the <br /> percolation tests. Each hole was filled with water to a height of 12 inches above the l� <br /> bottom of the boring for the presaturation. On the day of testing, the holes were found SJ <br /> to be intact and dry. <br /> Percolation Test Procedure <br /> Live Oak conducted the percolation tests for the borings on July 18, 2012. Due to soil <br /> conditions observed, four-hour tests were selected. Water level measurements were <br /> taken every 30 minutes during this four-hour period. The last half hour of each test was <br /> observed by Michael Escotto, Senior Registered Environmental Health Specialist at the <br /> San Joaquin County Environmental Health Department. <br /> LOGE 1213 Page 7 <br />