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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. The laboratory analytical results are attached as Appendix 5 of this report. Soil Profile and Geologic Information The Site is mapped on the Geologic Map of California: San Jose sheet (Rodgers, 1966). It is depicted within map units of Great Valley basin deposits (Plate 7). The surface and near surface soils located at the Site are reported by the Web Soil Survey (USDA, 2015) to be composed of Jacktone clay and Stockton clay (Plate 8). 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 (in) Classification mmhos/cm Reaction ability absorption Symbol pH (in/hr) fields Jacktone 0-22 Clay; CL, CH <2 6.6-8.4 0.06-0.2 Severe: clay, 0-2% 22-34 Clay loam, clay, silty <2 7.9-9.0 0.06-0.2 cemented slopes, clay; CL, CH pan, peres 180 34-37 Indurated --- --- --- slowly 37-46 Loam, clay loam; CL- <2 7.9-9.0 0.2-0.6 ML, CL 46-60 Cemented --- --- --- Stockton Severe: 0-29: Clay; CL, CH <2 7.4-8.4 0.14-0.16 clay, 0-2% 29-37: Clay, silty clay; CL, CH <2 7.4-8.4 0.14-0.16 peres slowly slopes, 250 37-42: Clay loam, silty clay <2 7.4-8.4 0.14-0.17 loam; CL 42-60: 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 August 26, 2015, Live Oak excavated a shallow soil boring on the proposed homesite parcel the Site for the purpose of conducting a percolation test. The boring was four inches in diameter, 3.25 feet deep, and was excavated by hand auger (Table 2). The location of the boring is indicated on Plate 9. The soil in the boring was similar to, though sandier than, that described by the Soil Survey. Clay was encountered to a depth of 2.5 feet, followed by clayey sand to the full depth of the hole. The soil log is presented on Plate 10. LOGE 1515 Page 5