Laserfiche WebLink
August 31, 2006 <br /> NOA Project Number: E06091A <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 /> i The Site is depicted on the USGS Geologic Map of the San Francisco-San Jose Quadrangle (199 1) as within <br /> the Quaternary Modesto Formation (Plate 7). These map units represent arkosic alluvium forming <br /> Mokelumne River terraces, channel ridges and alluvial fans. <br /> The surface and near surface soils located at Site are reported by the San Joaquin County Soil Survey to <br /> F1be composed of Guard clay loam, drained, 0 to 2 percent slopes (Plate 7) (USDA, 1992). Table 2 <br /> tttt presents some selected properties of these soils: <br /> i <br /> Table 2. <br /> 4 Selected Soil Properties of the Surrounding Area <br /> San Joaquin County Soil Survey Report. <br /> Soil Name Depth(in) Unified Soil Classification Salinity. Soil Septic tank <br /> and Map mmhos Reaction absorption <br /> Symbol /cm pH fields <br /> Devries 0-13 Sandy loam;Slbl <2 6.6-8.4 2.0-6.0 2.0-6.0 <br /> sandy loam, 13-28 Sandy loam,fine sandy loam;SM <2 6.6-8.4 <br /> drained,0- Indurated --- <br /> 2%slopes 28-80 --- <br /> 149 <br /> Guard clay 0-15 Clay loam;CL <2 7.9-8.4 .2-.6 <br /> loam, . 15-72 Clay loam,sandy clay loam;SC,CL <2 7.9-8.4 .06-.2 <br /> drained,0- <br /> 2%slopes <br /> 169 <br /> Rioblancho, 0-16 Clay loam;CL <2 7.4-8.4 0.2-0.6 <br /> drained,0- 16-28 Loam,clay loam;CL-ML,CL <2 7.4-8.4 0.2-0.6 <br /> 2%slopes, 28-39 Sandy loam,loam,silt loam;SC-SM,SM, <2 7.48.4 0.6-2.0 <br /> 226. CL-ML,ML <br /> 39-80 Cemented <2 -- -- <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> 5.1 Soil Boring Locations <br /> Two soil borings were advanced on the Site. One boring was drilled to a depth of approximately 3 <br /> feet and the other was drilled to a depth of approximately eight and a half feet. The soil borings <br /> were used later for percolation test holes;the locations of the borings are indicated in Plate 1. <br /> Fi 6 <br />