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` March 27,2006 <br /> �NOA Project Number: E05144B <br /> l/4.6 Chain of Custody <br /> The Chain of Custody document has been included in the appendix of this report. <br /> L <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> L The Site is depicted on the USGS Prrkminag Geolo*Map of Cenozoic Deposits of the BelloiaQuadrangle as <br /> consisting of Mehrten Formation geology with small areas of Turlock Lake Formation and <br /> Lundifferentiated alluvium and colluvium (OFR-79-664). The Mehrten Formation is made up of <br /> andesitic conglomorate, sandstone,mudstone, and lahars. The Turlock Lake Formation is made up <br /> Lof arkosic alluvium and some locally-derived 923j= (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of Bruella sandy loam,Columbia fine sandy loam,Pentz sandy loam,Ramoth sandy <br /> Lloam,Tokay fine sandy loam and Vina fine sandy loam (Plate 8) (USDA, 1992). Table 2 presents <br /> some selected properties of these soils: <br /> Table 2. <br /> San Joaquin County Soil Survey <br /> Selected Soil Properties of On-Site Soils. <br /> Soil Name Depth Unified Soil Classification Salinity Soil Perme- Septic tank <br /> and Map (in) mmhos/an Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Columbia fine 0-12 Fine sandy loam <2 6.1-7.8 2.0-6.0 peres slowly <br /> sandy loam, 12-60 Stra a sand to silt loam <2 6.1-7.8 <br /> 0-20/a slopes, <br /> 130 <br /> Ramoth sandy 0-14 Sandy loam <2 5.6-6.5 2.0-6.0 Severe:peres <br /> loam,0-2% 14-32 Sandy loam,coarse sandy loam <2 5.6-6.5 2.0-6.0 slowly <br /> slopes,217 32-54 Sandy day loam <2 6.1-7.3 0.2-0.6 <br /> 54-60 Sandy loam,coarse sandy loam, <2 6.1-7.3 2.0-6.0 <br /> loamy coarse sand <br /> Vina fine 0-9 Fine sandy loam <2 6.1-7.3 2.0-6.0 Moderate: <br /> sandy loam, 9-37 Sandy loam,loam,fine sandy <2 3.1-7.3 0.6-2.0 flooding, <br /> 0-20/6 slopes, loam <2 6.1-7.3 0.6-2.0 peres slowly <br /> 272 37-60 Stratified sandy loam to loam <br /> Tokay fine 0-19 Fine sandy loam;SM ° 6.1-7.8 2.01-6.0 Severe:peres <br /> sandy loam, 19-45 Fine sandy loam,sandy loam; <2 <br /> 6.1-7.8 2.0-6.0 slowly <br /> 0-2%slopes SM <br /> 256 45-60 Fine sandy loam,sandy loam, <2 6.1-8.4 2.0-6.0 <br /> �. coarse sandy loam;SM <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> n. <br /> 6 <br />