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March 11, 2005 <br /> NOA Project Number: E04159A <br /> �4.5 Well Water Sample Collection, Handling, and Transportation <br /> The samples were.collected in a clean,plastic container, then decanted into clean,glass vials. The <br /> samples were then transported on ice and remanded under chain of custody to Precision Enviro- <br /> Tech, Stockton. <br /> /4.6 Chain of Custody <br /> The Chain of Custody document has been included in the appendix of this report. <br /> 5A SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the USGS Preliminary Geologic Map of Cenozoic Deposits of the Bellota�uadrangle <br /> (1979) as within the Modesto Formation. The Quaternary Modesto Formation (lower member) <br /> consists of unconsolidated,unweathered gravel, sand silt and clay. The upper member forms - <br /> # 1 terraces that are.topographically a £ew.meters higher.than those of the upper member (Plate 7). <br /> The surface and near surface soils located at the Site.are reported by the Sanroaquin County Soil Survey <br /> to be composed of Tokay fine sandy loam,-0-2 percent slopes. (Plate 8) (USDA, 1992). Table 3 <br /> presents some selected properties of these soils: <br /> Table 3. <br /> E } San Joaquin-County Soil Survey <br /> Selected Soil Properties of On-Site Soils.. <br /> Soil Narne Depth Unified Soil Classification Salinity Soil Penne- Septic tank' <br /> and Map (in) nnmhos/cm Reaction ability absorption:; <br /> Y <br /> S mbol - -�' pH (in/hr) - fields <br /> _ <br /> Tokay fine . X0=19: Fine sandy loam;SM.. <2 6.1-7.8 2.0-6.0 Slight <br /> sandy loam, 19-45: Fine sandy loam,sandy loam;Sl <2 6.1-7.8 2.0-6.0 <br /> 0-2% 560: ZFinc sandy loam,sandy loam, <2 6.1-8.4 2.0-6.07 <br /> slopes,256. rse sandy,loam;Si <br /> F! <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> J/5.1 Soil Boring Locations <br /> A total of two soil borings were advanced on the Site, one (1) boring to a depth of 3 feet, one (1) <br /> W boring to a depth of 25 feet. The soil borings'were used later for percolation test holes;the locations <br /> of the borings are indicated in Plate 1. <br /> ' Y 5.2 Soil Boring Dimensions <br /> ' The soil borings were 25 feet or three feet deep and were six inches in diameter. <br /> j 6 <br /> t 4 <br />