Laserfiche WebLink
bw <br /> r January 26,2006 <br /> NOA Project Number: E05091B <br /> DB as not found in the water �eadlth <br /> ple. DBCP is a nematocide and soil fumigant for vegetables <br /> an gra problems consisting of kidney damage,liver damage,and <br /> cancer. The use of DBCP was discontinued in 1979.The Environmental Protection Agency (EPA) <br /> set the maximum contaminant limit (MCL) at 0.2 parts per billion (ppb) because the EPA believes <br /> that given present technology and resources, this is the lowest level to which water systems can <br /> reasonably be required to remove this contaminant should it occur in drinking water. <br /> /4.5 Well Water Sample Collection, Handling, and Transportation <br /> ►. <br /> The sample for nitrate was collected in a sterile plastic container, the sample for DBCP was <br /> collected in two sterile glass vials. The samples were then transported on ice and remained under <br /> .. chain of custody to Precision Enviro-Tech, Stockton. <br /> r 4.6 Chain of Custody <br /> The Chain of Custody document has been included in the appendix of this report. <br /> 4,- 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION <br /> The Site is depicted on the Geologic Maps of the Sacramento-San Joaquin Delta as within the <br /> Quaternary Modesto Formation and Quaternary Riverbank Formation (Plate 7). The Quaternary <br /> Modesto Formation (undifferentiated) is unit of undifferentiated alluvial deposits,mainly arkosic, <br /> U" forming toe of the Mokelumne alluvial fan,generally covered by 0.3 to 1.0 m of Holocene intertidal <br /> deposits. <br /> The surface and near surface soils located at the Site are reported by the San Joaquin County Soil Survey <br /> to be composed of Tokay fine sandy loam, 0-2% slopes (Plate 8) (USDA, 1992). Table 3 presents <br /> L some selected properties of these soils: <br /> `r <br /> 7 <br /> 'A4 <br /> �s <br />