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• reasonably be required to remove this contaminant should it occur in drinking water. <br /> The Maximum Contaminant Level Goal (MCLG) for DBCP is zero. <br /> The laboratory analytical results are attached as Appendix 5 of this report. <br /> Soil Profile and Geologic Information <br /> The Site is depicted on the Preliminary geologic map of Cenozoic deposits of the <br /> Bellota Quadrangle, California (Marchand and Bartow, 1979). The Site is depicted <br /> within map units of the Holocene alluvium, described as "channel and levee deposits," <br /> and the Modesto Formation lower member, described as "arkosic alluvium forming <br /> Mokelumne River terraces and alluvial fan; chiefly sand; probably glacial outwash" <br /> (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the USDA Web <br /> Soil Survey to be composed of Ramoth sandy loam (Plate 8) (USDA, 2018). The table <br /> below presents some selected properties of this soil: <br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992) <br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank <br /> and Map <br /> S Reaction ability absorption <br /> Symbol (m) Classification mmhos/cm <br /> y pH (in/hr) fields <br /> • Ramoth 0-14 Sandy loam; SM <2 5.6-6.5 2.0-6.0 Severe: <br /> sandy loam, 14-32 Sandy loam, coarse <2 5.6-6.5 2.0-6.0 peres slowly <br /> 5-8% sandy loam; SC-SM <br /> slopes, 32-54 Sandy clay loam; SC <2 6.1-7.3 0.2-0.6 <br /> 216 54-60 Sandy loam, coarse <2 6.1-7.3 2.0-6.0 <br /> sandy loam, loamy <br /> coarse sand, SM <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. See description of the map unit for <br /> composition and behavior characteristics of the map unit. <br /> Soil Borings <br /> On March 27, 2018, Live Oak excavated a shallow soil boring in the proposed septic <br /> disposal area of the Site for the purpose of conducting a percolation test. The boring <br /> was four inches in diameter, 3.38 feet deep, and was excavated by hand auger (Table <br /> 2). The location of the boring is indicated on Plate 9. <br /> The soil in the boring was similar to that described by the Soil Survey. Silty sand was <br /> encountered to the full depth of the hole. The soil log is presented on Plate 10. <br /> • LOGE 1820 Page 5 <br />