Laserfiche WebLink
• PHYSICAL SETTING <br /> Topography <br /> The elevation of the Site, according to a United States Geological Survey topographic <br /> map, is approximately 10 to 12 feet above mean sea level (Plate 3). The Site is <br /> relatively flat. <br /> Geology <br /> The Site is mapped on the Geologic maps of the Sacramento-San Joaquin Delta, <br /> California (Atwater, 1982). It is depicted within a map unit of the Modesto formation <br /> (Pleistocene), described as "compact silt and very fine sand" (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 Manteca fine sandy loam and Veritas fine <br /> sandy loam (Plate 5). The table below presents some selected properties of these soil <br /> types: <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 /> Manteca 0-11 Fine sandy loam; SM <2 7.4-8.4 2.0-6.0 Severe: <br /> fine sandy 11-24 Sine sandy loam, loam, <2 7.4-8.4 0.6-2.0 cemented <br /> loam, 0-2% sandy loam, SM, SC-SM pan <br /> slopes, 196 24-35 Indurated <2 --- --- <br /> 35-54 Cemented <2 --- --- <br /> 54-74 Stratified loamy sand to <2 7.4-8.4 2.0-6.0 <br /> loam; SM <br /> Veritas fine 0-15 Fine sandy loam; SM, <4 7.4-8.4 2.0-6.0 Moderate: <br /> sandy loam, SC-SM <4 7.4-8.4 2.0-6.0 flooding, <br /> 0-2% 15-54 Sandy loam, fine sandy cemented <br /> slopes, loam; SM, SC-SM pan <br /> 266 54-70 Cemented <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 /> • LOGE 1802 Page 2 <br />