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Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm pH (in/hr) fields <br /> Veritas fine 0-15 Fine sandy loam; SM, <4 7.4-8.4 2.0-6.0 Moderate: <br /> sandy loam, SC-SM flooding, <br /> 0-2% 15-54 Sandy loam, fine sandy <4 7.4-8.4 2.0-6.0 cemented <br /> slopes, loam; SM, SC-SM pan <br /> 266 54-70 Cemented -- -- -- <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for <br /> composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On June 22, 2020, Live Oak excavated a shallow soil boring near the proposed septic <br /> disposal area of the Site for the purpose of percolation testing. The boring was four <br /> inches in diameter, 3.41 feet deep, and was excavated by hand auger. The location of <br /> the boring is indicated on Plate 11. <br /> The soil in the boring was similar to that described by the Soil Survey. Silty fine sand <br /> was encountered to the full depth of the hole. The soil log is presented on Plate 12. <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 shallow soil zone. Sandy soils generally have a much greater <br /> potential for percolation than fine-grained or cemented soils. However, a percolation <br /> test is the only accepted method for determining the suitability of the soils for a septic <br /> disposal area. Percolation test results are discussed in the following section. <br /> Percolation Test <br /> A shallow percolation test was conducted in the proposed septic disposal area of the <br /> Site. The soil boring discussed above was used for the percolation test hole. <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 boring was advanced by hand auger and the soil logged, the test hole was <br /> completed for the percolation testing. Approximately two inches of pea gravel were <br /> placed in the bottom of the open soil boring, followed by a 2.0-inch diameter PVC pipe <br /> with perforations on the bottom. Pea gravel was then used to backfill a few inches of <br /> the annular space. <br /> LOGE 20-26 Page 5 <br />