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alluvium, sand ... and silt, forming terraces, and alluvial fans along the Consumnes and <br /> Mokelumne Rivers." <br /> The surface and near surface soils located at the Site are reported by the USDA Web <br /> Soil Survey to be composed of the San Joaquin Complex (Plate 11) (USDA, 2019). 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 mmhos/cm Reaction ability absorption <br /> Symbol (in) Classification pH (in/hr) fields <br /> San Joaquin- 0-16 Loam; CL-ML, ML <2 5.6-6.5 0.6-2.0 Severe: <br /> Urban 16-26 Clay loam, clay; CL <2 6.1-7.8 <0.06 cemented <br /> Complex, 26-60 Indurated --- --- --- pan, peres <br /> 0-1% slopes, slowly <br /> 241 <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 24, 2019, Live Oak excavated a shallow soil boring near the proposed septic <br /> disposal area of the Site for the purpose of conducting a percolation test. The boring <br /> was four inches in diameter, 3.37 feet deep, and was excavated by hand auger (Table <br /> 2). The location of the boring is indicated on Plate 12. <br /> The soil in the boring was similar to, but sandier than, that described by the Soil Survey. <br /> Sandy clay was encountered to 1.5 feet below ground surface, followed by cemented <br /> clayey sand to the full depth of the hole. The soil log is presented on Plate 13. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be limited 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 /> LOGE 1933 Page 5 <br />