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Soil Profile and Geologic Information <br /> The Site is mapped on the Geologic Map of California: San Jose sheet (Rodgers, 1966). <br /> It is depicted within map units of Great Valley basin deposits (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the Web Soil <br /> Survey (USDA, 2015) to be composed of Manteca fine sandy loam (Plate 8). 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 (in) Classification mmhos/cm Reaction ability absorption <br /> Symbol 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 Fine 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 /> 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 August 26, 2015, Live Oak excavated a shallow soil boring on the proposed <br /> homesite parcel the Site for the purpose of conducting a percolation test. The boring <br /> was four inches in diameter, 3.40 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. Sandy silt was <br /> encountered to a depth of two feet, followed by silty, very fine sand to the full depth of <br /> the hole. The soil log is presented on Plate 10. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be moderate potential for <br /> percolation in the shallow soil zone at the test location. Sandy soils generally have a <br /> much greater potential for percolation than fine-grained or cemented soils. However, a <br /> percolation test is the only accepted method for determining the suitability of the soils <br /> for a septic disposal area. Percolation test results are discussed in the following <br /> section. <br /> LOGE 1511 Page 5 <br />