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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 Merritt silty 0-17 Silty clay loam; CL <2 6.6-8.4 0.2-0.6 Severe: clay loam, peres slowly partially 17-49 Silt loam, silty clay loam; <2 7.9-8.4 0.2-0.6 drained, 0-2 CL % slopes, 197 19-60 Stratified loamy fine <2 7.9-8.4 0.6-2.0 sand to silt loam; SM, ML 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 March 18, 2020, Live Oak excavated a shallow soil boring on the proposed homesite parcel of the Site for the purpose of conducting a percolation test. The boring was four inches in diameter, 3.50 feet deep, and was excavated by hand auger (Table 2). The location of the boring is indicated on Plate 12. The soil in the boring was similar to that described by the Soil Survey. Silty clay was encountered to 1.5 feet below ground surface, followed by sandy silt to the full depth of the hole. The soil log is presented on Plate 13. Discussion of Soil Lithology Based on the soil observed in the boring, there appears to be some potential for percolation. 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 on the proposed homesite parcel 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 20-12 Page 6