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S%010 <br /> May 5,2005 <br /> NOA Project Number: E05057A <br /> 4.6 Chain of Custody <br /> The Chain of Custody document has been included in the appendix of this report. <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the Geologic Map of the Sacramento-San Joaquin Delta, California (1982), <br /> as within a region of Alluvium of Supratidal Flood Plains (Holocene)which consists of alluvial <br /> floodplains,undivided (Plate 3). <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 the Grangeville clay loam,partially drained, 0-2% slopes and Merritt silty clay <br /> loam,partially drained, 0-2% slopes (Plate 4) (USDA, 1992). Table 4 presents some selected <br /> properties of the soils: <br /> Table 4. <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/ Reaction ability absorption <br /> Symbol cm pH (in/hr) fields <br /> two Grangeville 0-16: Clay loam;CL <2 6.6-7.8 0.2-0.6 Moderate: <br /> clay loam, 16-36: Sandy loam,fine sandy loam, <2 6.6-8.4 2.0-6.0 flooding, <br /> partially loam;SM,ML wetness <br /> drained, 36-60: Stratified loamy sand to silt loam; <2 6.6-8.4 2.0-6.0 <br /> .w 0-2%slopes, SM <br /> 167. <br /> Merritt silty 0-17: Silty clay loam;CL <2 6.6-8.4 0.2-0.6 Severe: <br /> b' clay loam, 17-49: Silt loam,silty clay loam;CL <2 7.9-8.4 0.2-0.6 Peres slowly <br /> partially 49-60: Stratified loamy fine sand to silt <2 7.9-8.4 0.6-2.0 <br /> drained, loam;SM,ML <br /> r. 0-2%slopes, <br /> 197. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> b. <br /> 7 <br /> r <br /> '--44 <br />