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present technology and resources, this is the lowest level to which water systems can reasonably be required to remove this contaminant should it occur in drinking water. The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. Soil Profile and Geologic Information The Site is depicted on the Geologic map of the San Francisco-San Jose quadrangle, California (Wagner et. al, 1991). The Site is depicted within a map unit of the Modesto formation (Plate 9). The surface and near surface soils located at the Site are reported by the USDA Web Soil Survey to be composed of Finrod clay loam (Plate 10) (USDA, 2020). The table below presents some selected properties of this soil: Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map (in) Class Reaction ability absorption Symbol Classification mmhos/cm pH (in/hr) fields Finrod clay 0-8 Clay loam; CL <2 6.6-7.8 0.2-0.6 Severe: loam, 0-2% 8-33 Clay loam, clay; CL, CH <2 6.6-7.8 0.06-0.2 peres slowly slopes, 158 33-48 Clay loam, silty clay <2 7.4-8.4 0.06-0.2 loam, clay; CL, CH 48-60 Cemented --- --- --- 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 29, 2021, Live Oak excavated a shallow soil boring near the proposed septic disposal area of the Site for the purpose of conducting a percolation test. The boring were four inches in diameter, 3.35 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. Clay 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 limited potential for percolation in the shallow soil zone 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 LOGE 2118 Page 5