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L <br /> June 6, 2006 <br /> NOA Project Number: E06019B <br /> 4.5 Well Water Sample Collection, Handling, and Transportation <br /> The samples were collected in a sterile plastic container and two sterile glass vials. The samples were <br /> then transported on ice and remained under chain of custody to FGL Environmental,Stockton. t <br /> 4.6 Chain of Custody <br /> The Chain of Custody document has been included in the appendix of this report. <br /> L 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the USGS Preliminary Geologic Map of the Bellota Quadrangle as within the <br /> Quaternary Riverbank Formation. The Quaternary Riverbank Formation (upper member) consists <br /> of arkosic alluvium forming Mokelumne River terraces and alluvial fan;chiefly sand;probably glacial <br /> outwash lower fans;abundant volcanic detritus (Plate 7). <br /> LThe surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of San Joaquin loam, thick surface, 0-2% slopes (Plate 13) (USDA, 1992). Table 4 <br /> presents some selected properties of these 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/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> SanJoaquin 0-12: Loam;CL-ML,ML <2 5.6-6.5 0.6-2.0 Poor:too <br /> loam,thick 12-26: Sandy clay loam;SC <2 6.1 -7.3 0.2-0.6 clayey <br /> surface, 26-35: Clay loam,clay;CL <2 6.1 -7.8 <0.06 <br /> 0-2% 35-60 Indurated --- --- -- <br /> slo es 240. <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> r <br /> t 5.1 Soil Boring Locations <br /> ` A total of 4 soil borings were advanced on the Site.Two borings were drilled to a depth of about 25 <br /> feet. Two borings were drilled to a depth of about three to three and a half feet. The soil borings <br /> were later used for the percolation test holes;the locations of the borings are indicated in Plate 1. <br /> ( 6 <br /> .444L <br />