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Surface water samples are analyzed for the following monitoring and field parameters <br /> semiannually: <br /> • Temperature 0 Chloride <br /> • Electrical Conductivity 0 Sulfate <br /> • pH Nitrate-Nitrogen <br /> • Turbidity Calcium <br /> • Total Dissolved Solids Magnesium <br /> • Carbonate Alkalinity Sodium <br /> • Bicarbonate Alkalinity Potassium <br /> • Volatile Organic Compounds(VOCs) <br /> Surface water samples are also analyzed for the following CDCs every 5 years: <br /> • Total Organic Carbon <br /> • Inorganics(dissolved) <br /> • VOCs (extended list) <br /> • Semi-Volatile Organic Compounds <br /> • Chlorophenoxy Herbicides - <br /> • Organophosphorous Compounds <br /> Constituents of Concern <br /> Both groundwater and surface water samples are analyzed for constituents of concern(COCs) <br /> every five years(Appendix E). The last five year COC groundwater monitoring event occurred in <br /> the fourth quarter of 1999. The next monitoring event will occur during the fourth quarter of <br /> 2004. <br /> Surface water samples were last analyzed for COCs during the first quarter 2000 monitoring <br /> event. The next monitoring event for surface water will occur during the first quarter of 2005; <br /> however,water will be sampled if available in late 2004. <br /> Statistical.Analysis <br /> The FSL has been approved to use interwell tolerance limits methods(up-gradient well provides <br /> the background data). Analytical results from this monitoring period were compared to the <br /> concentration limits shown in Table 1. As requested by RWQCB staff, stiff diagrams are included <br /> in the second semester and annual report. <br /> Foothill Sanitary Landfill 5 Department of Public Works/Solid Waste <br /> 1 sT Semester 2004 Groundwater Monitoring County of San Joaquin-July 27,2004 <br />