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L <br /> VM <br /> - Mr.Jeffrey Wong <br /> r-� San Joaquin Public Health Service <br /> Fourth Quarter 2003 Groundwater Monitoring Report <br /> June 11,2004 <br /> Page 4 of 4 <br /> L j <br /> SUMMARY <br /> i <br /> LThe following summarizes the results of December 2003 groundwater monitoring. <br /> i <br /> + Groundwater elevations measured during December 2003 were approximately—32 feet MSLD,and with a i <br /> I Lgradient of 0.011 to the west-northwest. ' <br /> + TPH reported as unknown hydrocarbon was reported for one well. <br /> • 1,2-DCA was reported for only two wells,DMW-5 and DMW-6,at concentrations below previously <br /> L reported ranges of concentrations for those wells. <br /> • PCE was not reported in any of the samples. <br /> { <br /> LI' If you have any questions or need additional information, please do not hesitate to call me at <br /> (916) 679-2293. <br /> LSincerely, <br /> URS Corporation Americas <br /> Alwe <br /> Anthony o y Mmdltng,R.G. <br /> Project Geohydrologist <br /> Attachments <br /> List of Tables <br /> Table I Monitoring Well Construction Details <br /> i , Table 2 Water Level Data <br /> Table 3 Groundwater Analytical Results, TPH-diesel (Method 8015B), Volatile Organic <br /> Compounds and Oxygenates (EPA Method 8260B <br /> f <br /> List of Figures <br /> Figure 1 Site Vicinity Map <br /> Figure 2 Site Location Map , <br /> l <br /> Figure 3 Groundwater Elevation Contour Map, September 25, 2003 , <br /> ' Figure 4 PCE and 1,2-DCA Concentrations <br /> List of Appendices <br /> Appendix A Field Record of Water Sample and Chain-of-Custody Forms <br /> Appendix B Data Validation Summary and Analytical Laboratory Report <br /> i <br /> ��rr <br /> K:IWprocess12273614Q03AFP_rev0l.doc , <br />