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PHYSICAL SETTING <br /> Topography <br /> The elevation of the Site, according to a United States Geological Survey topographic <br /> map, is approximately 100 feet above mean sea level (Plate 3). The Site is relatively <br /> flat. <br /> Geology <br /> The Site is mapped on the Preliminary geologic map of Cenozoic deposits of the Bellota <br /> quadrangle, California (Marchand, D.E., and Bartow, J.A., 1979). It is depicted within <br /> the Riverbank formation middle unit, described as "arkosic alluvium forming Mokelumne <br /> River terraces and alluvial fan; chiefly sand; probably glacial outwash" (Plate 4). <br /> Soil Analysis <br /> Chemical and Physical Properties of the Soil <br /> The surface and near surface soils located at the Site are reported by the Web Soil <br /> Survey (USDA, 2018) to be composed of Bruella sandy loam (Plate 5). The table below <br /> presents some selected properties of this soil type: <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 Reaction ability absorption <br /> Symbol (in) Classification mmhos/cm pH (in/hr) fields <br /> Bruella sandy 0-18: Sandy loam; SC-SM, <2 6.1 - 7.3 2.0 -6.0 Severe: <br /> loam, 0-2 % SM peres slowly <br /> slopes, 111 18-31: Sandy clay loam, <2 6.1 - 7.3 0.2 - 0.6 <br /> sandy loam; SC <br /> 31-67: Sandy clay loam, clay <2 6.1 - 7.3 0.2 - 0.6 <br /> loam; SC, CL <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 /> The soil encountered on the Site was similar to that described by the Soil Survey. On <br /> September 18, 2018, Live Oak excavated a 3.37-foot soil boring on the Site for the <br /> purpose of conducting a percolation test. The soil in the boring was observed to be silty <br /> sand with clay to the full depth of the hole; the first approximately two feet were found to <br /> be cemented. <br /> LOGE 1918 Page 2 <br />