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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 Jacktone clay (USDA, 2026) (Plate 11). The table below <br /> presents some selected properties of this soil type: <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 y Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm <br /> y pH (in/hr) fields <br /> Jacktone 0-22 Clay; CL, CH <2 6.6-8.4 0.06-0.2 Severe: <br /> clay, 0-2% 22-34 Clay loam, clay, silty <2 7.9-9.0 0.06-0.2 cemented <br /> slopes, clay; CL, CH pan, peres <br /> 180 34-37 Indurated --- --- --- slowly <br /> 37-46 Loam, clay loam; CL- <2 7.9-9.0 0.2-0.6 <br /> ML, CL <br /> 46-60 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 March 30, 2026, Live Oak excavated a shallow soil boring in the proposed future <br /> septic disposal area for the new house. The boring was four inches in diameter, 2.90 <br /> feet deep, and was excavated by hand auger. The location of the boring is indicated on <br /> Plate 12. <br /> The soil in the boring was similar to, though sandier than, that described by the Soil <br /> Survey. Clay was encountered to a depth of 2.25 feet below ground surface, followed <br /> by clayey coarse sand with gravel to the full depth of the hole. The soil log is presented <br /> 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 future septic disposal area for <br /> the new house. 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 2614 Page 5 <br />