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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 mmhos/c Reaction ability absorption <br /> Symbol (in) Classification m pH (in/hr) fields <br /> Calla, 8- 0-11: Clay loam; CL <2 7.4 - 8.4 0.2 - 0.6 Severe: <br /> 30% slopes, 11-29: Clay loam; CL <2 7.4 - 8.4 0.2 - 0.6 peres slowly, <br /> 116 29-60: Clay loam; CL <2 7.4 - 8.4 0.2 - 0.6 slope. <br /> Pleito, 8- 0-16: Clay loam; CL <2 7.4 - 8.4 0.2 - 0.6 Severe: <br /> 30% slopes, 16-60: Clay loam, CL <2 7.9 - 8-4 0.2 - 0.6 peres slowly, <br /> 116 slope. <br /> Carbona 0-6: Clay loam; CL <4 7.4 - 8.4 0.06 - 0.2 Severe: <br /> clay loam, 6-25: Clay loam, clay; CL, CH <4 7.4 - 8.4 0.06 - 0.2 peres slowly. <br /> 2-8% 25-36: Clay loam, clay; CL, CH <4 7.9 - 8.4 0.06 - 0.2 <br /> slopes, 123 36-62: Clay loam, CL <4 7.9 - 8.4 0.2 - 0.6 <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 January 22, 2019, Live Oak excavated a shallow soil boring, under permit from the <br /> San Joaquin County Environmental Health Department, in the proposed septic disposal <br /> area of the Site for the/purpose ofc nducting a percolation test. The boring was four <br /> inches in diameter, 3.42 feet deep, a7d was excavated by hand auger (Table 2). The <br /> location of the boring is indicated on Plate 9. <br /> The soil in the boring was similar to that described by the Soil Survey. Clay was <br /> encountered to two feet below ground surface, followed by clay with sand and calcium <br /> carbonate inclusions to the full depth of the hole. The soil log is presented on Plate 10. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be some potential for <br /> percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> 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 (Plate 10). <br /> Percolation test procedures conformed to San Joaquin County Environmental Health <br /> Department policy. <br /> LOGE 1849 Page 5 <br />