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Soil Profile and Geologic Information <br /> The Site is mapped on the Geologic Map of California: San Jose sheet (Rogers, 1966). <br /> It is depicted within a map unit of Great Valley fan deposits (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the Web Soil <br /> Survey (USDA, 2016) to be composed of Chuloak coarse sandy loam and Delhi loamy <br /> sand (Plate 8). The table below presents some selected properties of these soils: <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 /> Chuloak 0-19 Coarse sandy loam, SM <2 5.6 -6.5 2.0 -6.0 Severe: <br /> coarse 19-44 Sandy clay loam, sandy <2 6.1 - 7.3 0.2 -0.6 peres slowly <br /> sandy loam, loam, SC-SM, SC <br /> 0-2% 44-55 Fine sandy loam, SM <2 6.6 -7.3 2.0 - 6.0 <br /> slopes, 127 55-64 Loamy coarse sand, SM <2 6.6 -7.3 6.0 - 20 <br /> Delhi loamy 0-16 Loamy sand; SM <2 6.1-7.8 6.0-20 Severe: <br /> sand, 0-2% 16-26 Loamy sand, loamy fine <2 6.1-7.8 6.0-20 Poor Filter <br /> slopes, 142 sand; SM <br /> 26-60 Sand, loamy sand, fine <2 6.1-7.8 6.0-20 <br /> sand; SP-SM, 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 22, 2016, 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. Silty, fine to very <br /> coarse sand was encountered to the full depth of the hole. The soil log is presented on <br /> Plate 10. <br /> Discussion of Soil Lithology <br /> Based on the soil observed in the boring, there appears to be good 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 1618 Page 5 <br />