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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 (in) Classification mmhos/cm Reaction ability absorption <br /> Symbol 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 May 16, 2017, Live Oak excavated shallow soil borings on the proposed new <br /> parcels of the Site for the purpose of conducting percolation tests. On May 22, 2017, <br /> Live Oak excavated a deep soil boring on Parcel 1 of the Site for a deep percolation ( �� <br /> test. The borings were four inches in diameter, 3.26, 3.42, and 6.19 feet deep, and <br /> were excavated by hand auger (Table 2). The locations of the borings are indicated on <br /> Plate 10. <br /> • The soil in the borings was similar to that described by the Soil Survey. Fat clay was <br /> encountered to a depth of approximately three feet, followed by cemented, clayey sand <br /> to the full depth of the holes. 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 limited potential for <br /> percolation at the test locations. Sandy soils generally have a much greater potential <br /> for percolation than fine-grained or cemented soils. However, a percolation test is the <br /> only accepted method for determining the suitability of the soils for a septic disposal <br /> area. Percolation test results are discussed in the following section. <br /> Percolation Test <br /> A shallow percolation test was conducted on the proposed Parcel 2 of the Site; shallow ` 2) <br /> and deep percolation tests were conducted on Parcel 1. The soil borings discussed <br /> above were used for the percolation test holes (Plate 10). Percolation test procedures <br /> conformed to San Joaquin County Environmental Health Department policy. <br /> • <br /> LOGE 1706 Page 5 <br />