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The surface and near surface soils located at the Site are reported by the USDA Web <br />Soil Survey to be composed of Tokay fine sandy loan (Plate 9) (USDA, 2020). The <br />table below presents some selected properties of this soil: <br />Table 1. Selected Properties of On -Site 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 <br />0-19 Fine sandy loam; SM <2 6.1-7.8 2.0-6.0 Slight <br />sandy loam, <br />19-45 Fine sandy loam, sandy <2 6.1-7.8 2.0-6.0 <br />0-2% <br />loam; SM <br />slopes, <br />45-60 Fine sandy loam, sandy <2 6.1-8.4 2.0-6.0 <br />256 <br />loam, coarse sandy <br />loam; SM <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 February 4, 2021, Live Oak excavated a shallow soil boring near the proposed <br />septic disposal area of the Site for the purpose of conducting a percolation test. The <br />boring was four inches in diameter, 3.49 feet deep, and was excavated by hand auger <br />(Table 2). <br />The location of the boring is indicated on Plate 10. <br />The soil in the boring was similar to that described by the Soil Survey. Fine sandy silt <br />was encountered to the full depth of the hole. The soil log is presented on Plate 11. <br />Discussion of Soil Lithology <br />Based on the soil observed in the borings, there appears to be moderate potential for <br />percolation at 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 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 />LOGE 2103 Page 4 <br />