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6. <br /> V April 13,2007 <br /> NOA Project Number: E07046A <br /> ., 4.2 Potential Ground Water Contamination Issues <br /> Identifying potential ground-water contamination sources was not part of the scope of work for the <br /> soil suitability study. <br /> Potential ground-water contamination can occur from a number of sources which often include <br /> leaky underground storage tanks,agricultural activities, dairies, septic systems, and storm water <br /> infiltration. Any past agricultural activities and the present use of septic systems in the area should <br /> be considered potential ground-water contamination sources. Please see section 4.4 for additional <br /> water quality details. <br /> LWater Sample Location <br /> One ell exists on site. One well permit was found that was issued in June of 1977. The permit was / <br /> L or a installation of a domestic well.A second permit was issued to David Weaver in March of <br /> 1994 for the replacement of the pump pipe in the domestic well. The last permit was issued in June <br /> of 1999 for the repair of the pump.A water sample was taken by Jessen Welch of our office on <br /> April 6, 2007 from the spigot of the well on the property. <br /> L <br /> 4.4 Water Sample Constituents_ <br /> ` The water s"Waterampp <br /> or 'trate P. a analytical reports prepared by FGL <br /> Environmeng. <br /> L 4.5 Weollection, Handling, and Transportation <br /> The sample for nitrate was collected in a sterile plastic container, and the samples for DBCP were,-' <br /> ` collected in two sterile glass containers. The samples were then transported on ice and remained <br /> under 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 /> L <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 /> 5 <br />