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` May 26,2005 <br /> NOA Project Number: E05004A <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 <br /> /4.5 Well Water Sample Collection, Handling, and Transportation <br /> LThe samples for nitrate was collected in a clean plastic container;the sample for DBCP was <br /> collected in two glass vials. The samples were then transported on ice and remanded under chain of <br /> Lcustody to Precision Enviro-Tech,Stockton. <br /> ✓4.6 Chain of Custody <br /> LThe Chain of Custody document has been included in the appendix of this report. <br /> ✓5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> LThe Site is depicted on the Preliminary Geologic Map of Cenozoic Depo.ats of the BellotaQuadrangle, <br /> California(1979), as within a region of Quaternary Riverbank Formation. Quaternary Riverbank <br /> Formation (middle unit)which is arkosic alluvium forming Mokelumne River terraces and alluvial <br /> Lfan;chiefly sand;probably glacial outwash (Plate 7). <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> fto be composed of the Bruella sandy loam, 0-2 percent slopes,Bruella sandy loam,hard substratum, <br /> 0-2 percent slopes and the San Joaquin loam,thick surface,0-2 percent slopes (Plate 8) (USDA, <br /> ` 1992). Table 3 presents some selected properties of the soils: <br /> L <br /> L <br /> L 6 <br />