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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 Preliminary geologic map of Cenozoic deposits of the Be/Iota quadrangle, California (Marchand & Bartow, 1979). The Site is depicted within a map unit of the Riverbank formation middle unit, described as "arkosic alluvium forming Mokelumne River terraces and alluvial fan; chiefly sand; probably glacial outwash" (Plate 8). The surface and near surface soils located at the Site are reported by the USDA Web Soil Survey to be composed of Rocklin sandy loam (Plate 9) (USDA, 2022). The table below presents some selected properties of this soil: 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 Rocklin sandy 0-25 Sandy loam; SM <2 5.6-6.5 0.6-2.0 Severe: loam, 2-5% slopes, 228 25-36 Loam, sandy clay loam, clay loam; SC, CL <2 6.1-7.3 0.6-2.0 cemented pan, percs slowly 36-40 Indurated 40-60 Coarse sandy loam, sandy loam; SM <2 6.1-7.3 <0.06 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 16, 2022, Live Oak excavated a shallow boring in the proposed septic disposal area of the new house on the Site for the purpose of conducting a percolation test. The boring was four inches in diameter, 2.15 feet deep, and was excavated by hand auger (Table 2). The location of the boring is indicated on Plate 10. The soil in the boring was similar to that described by the Soil Survey. Sandy silt was encountered to 1.5 feet below ground surface, followed by sandy clay to the full depth of the hole. The soil log is presented on Plate 11. LOGE 2219 Page 5