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Table 1. Selected Properties of Onsite Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map (in) Classification mmhos/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Tokay fine 0-19 Fine sandy loam; SM <2 6.1 -7-8 2.0-6.0 Slight <br /> sandy loam, 19-45 Fine sandy loam, sandy <2 6.1 -7.8 2.0-6.0 <br /> 0-2% loam; SM <br /> slopes, 256. 45-60 Fine sandy loam, sandy <2 6.1 - 8.4 2.0-6.0 <br /> loam, coarse sandy <br /> loam; SM <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> •See description of the map unit for composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On August 15, 2011, Live Oak excavated one shallow soil boring on the Site for the <br /> purpose of conducting a percolation test. The boring was four inches in diameter, 3.15 <br /> feet deep, and was excavated by hand auger. The boring location is indicated on Plate <br /> 2. <br /> The soil in the boring was within the range of what would be anticipated based on the -- <br /> Soil Survey data reviewed; sandy silt was observed the entire depth of the boring. The <br /> ^ <br /> log for the soil boring is presented in Plate 9. <br /> Discussion of Soil Lithology <br /> Based on the soils observed in the boring, there appears to be very good potential for <br /> percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> test results are discussed in the following section. <br /> Percolation Test <br /> One shallow percolation test was conducted on the Site; the shallow soil boring <br /> discussed above was used for the percolation test hole (Plate 2). Percolation test <br /> procedures conformed to San Joaquin County Environmental Health Department policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> After the boring was advanced by hand auger and the soils logged, the test hole was <br /> completed for the percolation test. Approximately 2 inches of pea gravel were placed in <br /> the bottom of the 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 /> LOGE 1122 Page 5 <br />