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L <br /> 1 February 24, 2006 <br /> NOA Project Number: E05139B <br /> 4.5 Well Water Sample Collection,Handling, and Transportation <br /> The nitrate sample was collected in a sterile plastic container,the DBCP sample was collected in two <br /> sterile glass vials. The samples were then transported on ice and remained under chain of custody to <br /> Precision Enviro-Tech in Stockton. <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 /> LThe Site is depicted on the California Geological Survey Geologic Map of Cenozoic Deposits of the San <br /> Francisco-San JoseQuadrangle (1991) as within the CDMG Map 5A. The Modesto Formation consists <br /> of Arkosic alluvium forming Mokelumne River terraces and alluvial fan;chiefly sand with minor <br /> ` gravel and silt;probably glacial outwash (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin Coun6y Soil Survey <br /> V to be composed of Delhi loamy sand, 0-2% slopes (Plate 8) (USDA, 1992). Table 2 presents some <br /> 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/cm Reaction ability absorption <br /> Symbol pH (in/hr) fields <br /> Delhi fine 0-16 Loamy sand;SM <2 6.1-7.8 6.0-20 Severe:poor <br /> sandy loam, 16-26 Loamy sand;loamy fine sand; <2 6.1-7.8 6.0-20 filter. <br /> 0-2% SM <br /> slopes, 142 26-60 1 Sand,loamy sand,fine sand;SP- <2 6.1-7.8 6.0-20 <br /> SM,SM <br /> Note: The table descriptions do not necessarily reflect site-specific soil properties. <br /> L5.1 Soil Boring Locations <br /> L A total of 4 soil boxings were advanced on the Site two borings to a depth of approximately three <br /> feet and two borings to a depth of around 25 feet. The soil borings were used later for percolation <br /> test holes;the locations of the borings are indicated in Plate 1. <br /> L5.2 Soil Boring Dimensions <br /> LThe soil borings were approximately three or 25 feet as noted above,and were eight inches in <br /> 6 <br /> L '00A <br /> L <br />