Laserfiche WebLink
• Soil Profile and Geologic Information <br /> The Site is depicted on the Preliminary geologic map showing Quaternary deposits of <br /> the Lodi quadrangle, California (Marchand and Atwater, 1979) within two map units of <br /> the Modesto formation upper unit, described as "arkosic alluvium forming Mokelumne <br /> River alluvial fan; chiefly sand; becoming finer-grained toward fan toe; probably glacial <br /> outwash" and "arkosic sand forming low dunes on the Mokelumne River and in the <br /> Delta; probably eolian, although not well sorted," and one map unit of the Modesto <br /> formation lower unit, described as "arkosic alluvium forming Mokelumne River alluvial <br /> fan; chiefly sand; probably glacial outwash." (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 Acampo sandy loam and Tokay fine sandy loam (Plate <br /> 8) (USDA, 2017). The table below presents some selected properties of the soil units: <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 (in) Classification mmhos/cm <br /> Reaction ability absorption <br /> Symbol <br /> pH (in/hr) fields <br /> Acampo 0-19: Sandy loam; SM <2 6.1 - 7.8 2.0 -6.0 Moderate: <br /> sandy loam, 19-47: Sandy loam, fine sandy <2 6.6 - 8.4 2.0 -6.0 cemented <br /> 0-2% loam, coarse sandy pan <br /> • slopes, loam; SM <br /> 101 47-49: Indurated --- --- --- <br /> 49-60: Cemented --- --- --- <br /> Tokay fine 0-19: Fine sandy loam; SM <2 6.1 - 7.8 2.0 -6.0 Slight <br /> sandy loam, 19-45: Fine sandy loam, sandy <2 6.1 - 7.8 2.0 -6.0 <br /> 0-2% loam; SM <br /> slopes, 45-60: Fine sandy loam, sandy <2 6.1 - 8.4 2.0 -6.0 <br /> 256 loam, coarse sandy <br /> loam; 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 September 26, 2018, Live Oak excavated one shallow soil boring on the Site for the <br /> purpose of conducting a percolation test. The boring was four inches in diameter, 3.00 <br /> feet deep, and was excavated by hand auger. The location of the boring is indicated on <br /> Plate 9. <br /> The soil in the boring was similar to that described by the Soil Survey. Sandy silt was <br /> encountered to the full depth of the boring. The log for the soil boring is presented in <br /> Plate 10. <br /> • LOGE 1841 Page 5 <br />