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Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name and Map Symbol Depth (in) Unified Soil Classification Salinity mmhos/cm Soil Reaction pH Perme- ability (in/hr) Septic tank absorption fields BrueIla 0-18: Sandy loam; SC-SM, <2 6.1 - 7.3 2.0 - 6.0 Severe: sandy loam, 0-2 % slopes, 111 18-31: SM Sandy clay loam, sandy loam; SC <2 6.1 -7.3 0.2 - 0.6 percs slowly 31-67: Sandy clay loam, clay loam; SC, CL <2 6.1 - 7.3 0.2 - 0.6 BrueIla 0-8: Sandy loam; SC-SM, <2 6.1 - 7.3 2.0 -6.0 Severe: sandy loam, hard substratum, 0-2 % slopes, 112 8-42: 42-60: SM Sandy loam, sandy clay loam; SC Sandy clay loam, sandy clay; SC <2 <2 6.1 6.1 - 7.3 - 7.3 0.2 - 0.6 0.06 - 0.2 percs slowly Note: The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for composition and behavior characteristics of the map unit. Soil Borings In May through June of 2019, Live Oak excavated shallow and deep soil borings in the proposed septic disposal area of the Site for the purpose of conducting a percolation test. The borings were four inches in diameter, 3.39 and 18.86 feet deep, and were excavated by hand auger (Table 2). The location of the borings is indicated on Plate 13. The soil in the boring was similar to that described by the Soil Survey. Sandy cwas . encountered to a depth of approximately two feet, followed by cemented—say clay to the full depth of the holes. The soil log is presented on Plate 14. - Discussion of Soil Lithology Based on the soil observed in the borings, there appears to be limited potential for percolation in the shallow and deep soil zones. Sandy soils generally have a much greater potential for percolation than fine-grained or cemented soils. However, a percolation test is the only accepted method for determining the suitability of the soils for a septic disposal area. Percolation test results are discussed in the following section. LOGE 1850 Page 6