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L <br /> I <br /> September 9,2005 <br /> NOA Project Number: E05106B <br /> ` DBCP was not detected in the water sample. DBCP is a nematocide and soil fumigant for <br /> vegetables and grapes. It is thought to cause health problems consisting of kidney damage,liver <br /> damage,and cancer. The use of DBCP was discontinued in 1979.The Environmental Protection <br /> �. Agency (EPA) set the maximum contaminant limit (MCL) at 0.2 parts per billion (ppb) because the <br /> EPA believes that given present technology and resources, this is the lowest level to which water <br /> / systems can reasonably be required to remove this contaminant should it occur in drinking water. <br /> l 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 remanded under chain of custody <br /> to Precision Enviro-Tech, Stockton. <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 /> The Site is depicted on the Geologic Ma of the San Franci co -San Jose Quadrangle, California(1991),as <br /> ` within a region of Quaternary Modesto Formation. Quaternary Modesto Formation Arkosic <br /> alluvium forming Mokelumne River terraces and alluvial fan;chiefly sand with minor gravel and silt; <br /> probably glacial outwash(Plate 7). <br /> LThe surface and near surface soils located at the Site are reported by the San Joaquin County Soil Sun)ey <br /> to be composed of the Galt clay, 0-2 percent slopes,Hollenbeck silty clay,0-2 percent slopes, <br /> 1 60 Jacktone clay, 0-2 percent slopes and the Vignolo silt loam, 0-2 percent slopes (Plate 8) (USDA, <br /> 1992). Table 3 presents some selected properties of the soils: <br /> 6. <br /> L <br /> 6 <br />