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Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map Reaction ability absorption Symbol (in) Classification mmhos/cm pH (in/hr) fields Tokay fine 0-19 Fine sandy loam; SM <2 6.1-7.8 2.0 - 6.0 Slight sandy loam, 19-45 Fine sandy loam, sandy <2 6.1-7.8 2.0 - 6.0 0-2% loam; SM slopes, 45-60 Fine sandy loam, sandy <2 6.1-8.4 2.0 - 6.0 256 loam, coarse sandy loam; SM 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 On September 21, 2021, Live Oak excavated a shallow soil boring near the existing septic disposal area of the proposed homesite parcel on the Site for the purpose of conducting a percolation test. The boring was four inches in diameter, 2.49 feet deep, and was excavated by hand auger (Table 2). The location of the boring is indicated on Plate 11. The soil in the boring was similar to that described by the Soil Survey. Sandy silt was encountered to the full depth of the hole. The soil log is presented on Plate 12. Discussion of Soil Lithology Based on the soil observed in the boring, there appears to be good potential for percolation at the test location. 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. Percolation Test A shallow percolation test was conducted near the existing septic disposal area of the Site. The soil boring discussed above was used for the percolation test hole. Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. LOGE 2151 Page 6