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the MCL at 0.2 parts per billion (ppb, equivalent to ug/L) because it believes that given 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 10). The surface and near surface soils located at the Site are reported by the USDA Web Soil Survey to be composed of Tinnin loamy coarse sand and Delhi fine sand (Plate 12) (USDA, 2019). The table below presents some selected properties of these soils: Table 1. Selected Properties of On-Site Soils (USDA, 1992) Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank and Map /cm Reaction ability absorption Symbol (in) Classification mmhos pH (in/hr) fields Delhi fine 0-10: Fine sand; SP-SM, SM <2 6.1-7.8 6.0-20 Severe: sand, 0-5% 10-60. Sand, loamy sand, fine <2 6.1-7.8 6.0-20 poor filter slopes, 141. sand; SP-SM, SM Tinnin 0-28: Loamy coarse sand; SM <2 6.1-7.8 6.0-20 Severe: loamy 28-53: Loamy coarse sand, <2 6.1-7.8 6.0-20 poor filter coarse loamy sand; SM <2 6.6-8.4 6.0-20 sand, 0-2% 53-75: Loamy coarse sand, slopes, 255. loamy sand, sand; 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 June 14, 2019, 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 was four inches in diameter, 3.29 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, fine to medium sand was encountered to the full depth of the hole. The soil log is presented on Plate 13. LOGE 1932 Page 5