Laserfiche WebLink
L <br /> April 7, 2006 <br /> NOA Project Number: E06020A <br /> can reasonably be required to remove this contaminant should it occur in drinking water. DBCP is a <br /> nematocide and soil fumigant for vegetables and grapes. It is thought to cause health problems <br /> consisting of kidney damage,liver damage,and cancer. The use of DBCP was discontinued in 1979. <br /> 4.5 Well Water Sample Collection, Handling, and Transportation <br /> L' The sample for nitrate was collected in a sterile plastic container,and the samples for DBCP were <br /> collected in two sterile glass VOAs. The samples were then transported on ice and remained under <br /> chain of custody to FGL Environmental, 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 Preliminary Geologic Map of the San Francisco - San Jose Cenozoic <br /> Quadrangle, as within a region of Quaternary Fan deposits. The unit consists of gravel, sandy silt <br /> and clay (Plate 3). <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 Capay clay,wet, 0 to 2 percent(USDA, 1992; Plate 4). Table 2 presents some <br /> selected properties of this soil type: <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 /> Capay clay,0- 0-20 Clay;CH,CL < 2 6.6-8.4 0.06-0.2 Severe: <br /> 2 percent 20-60 Clay,Silty clay;CL,CH <2 0.06-0.2 peres slowly <br /> slo es,118 <br /> Note:The table descriptions do not necessarily reflect site-specific soil properties. <br /> 5.1 Soil Boring Locations <br /> One percolation test hole and one groundwater boring were advanced on the Site, the first boring <br /> ` was drilled to a depth of approximately three feet, and the groundwater boring was drilled to a depth <br /> of approximately 8.5 feet. No groundwater was encountered. The boring test hole was used later for <br /> a percolation test hole; the location of the boring is indicatedtin Plate 1. <br /> 6 <br />