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February 22, 2006 <br /> NOA Project Number: E06010A <br /> 4.5 Well Water Sample Collection, Handling, and Transportation <br /> Each water sample for nitrate was collected in a sterile plastic container, and each sample for DBCP <br /> was collected in two sterile glass vials. The samples were then transported on ice and under chain of <br /> 1-{ custody to FGL Environmental, Stockton, California. <br /> �4.6 Chain of Custody <br /> The Chain of Custody documents have been included in the appendix of this report. <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the map Cenotioic Deposits of the Bellota Quadrangle ([JSGS 1979), as within a <br /> region of Turlock Lake Formation. The Turlock Lake Formation is a unit of arkosic alluvium, <br /> probably glacial outwash in part, and includes some locally-derived alluvium in areas near the <br /> Calaveras River (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Surrey <br /> to be composed of Cometa sandy loan, 2 to 5 percent slopes, Montpellier-Cometa complex, 5 to 8 <br /> percent slopes, and San Joaquin sandy loam, 2 to 5 percent slopes (Plate 8). The following table <br /> F1presents some selected properties of the soils: <br /> San Joaquin County Soil Survey <br /> Selected Soil Properties of On-Site Soils. <br /> 1 <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 /> Cometa 0-22: Sandy loam;S1bI,SC-SM <2 5.6-6.5 0.6-2.0 Severe:peres <br /> sandy loam, 22-36: Sandy clay,clay,clay loam;CL, <2 6.1-7.3 <0.06 slowly <br /> 2-5%slopes, CH <br /> 134 36-60: Stratified sandy loam to sandy <2 6.6-7.3 <0.06 <br /> clay loam;SM,SC-SM,SC <br /> F, Montpellier- 0-20: Coarse sandy loam;SM <2 5.6-7.3 2.0-6.0 Severe:peres <br /> Cometa 20-43: Sandy clay loam;SC <2 5.6-7.3 0.2-0.6 slowly <br /> complex,5- 43-55: Coarse sandy loam;SM <2 6.6-7.3 0.2-0.6 <br /> 8%slopes, 55-60: Sandy loam,coarse sandy loam; <2 6.1-7.3 <0.06 <br /> 200. SM <br /> San Joaquin 0-10: Sandy loam;SM <2 5.6-6.5 0.6-2.0 Severe: <br /> sandy loam, 10-20: Clay loam,clay;CL <2 6.1-7.8 <0.06 cemented <br /> 2-5%slopes, 20-60: Indurated pan,peres <br /> 237 slowl <br /> F-IIINote:The table descriptions do not necessarily reflect site-specific soil properties. <br /> l~Y, 7 <br />