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Groundwater samples are analyzed every 5 years for the following constituents of concern(COCl): <br /> VOCs(Extended List) Semi-VOCs <br /> Inorganics (Dissolved) Chlorinated Herbicides <br /> Polychlorinated Biphenols Organophosphorus Pesticides <br /> (PCBs) <br /> Organochlorine Pesticides <br /> Monitoring well elevations are taken quarterly. Hydrographs are included in the second semester and <br /> annual report as directed by the current WDRs. These figures present the following elevations: <br /> ❑ Groundwater for each quarter <br /> ❑ Top and bottom of well screen <br /> ❑ Pump intake <br /> Storm Water <br /> Storm water is collected from stormwater discharge points, located around the Solid Waste Management <br /> Unit at strategic locations. When discharge occurs, it is likely to be from the north western portion of <br /> the Unit or from the Interim Sedimentation Pond. Discharges at these points are through culverts, with <br /> the discharge controlled by valves. <br /> Surface Water <br /> Surface water is sampled at upstream monitoring point S-1 and downstream monitoring point S-2 <br /> (Figure 3)when water is flowing. Samples are collected after the first storm of the rainy season that <br /> produces significant flow, and quarterly thereafter when water is flowing. <br /> Surface water samples are analyzed for the following semi-annual field and monitoring parameters: <br /> Temperature Total Alkalinity <br /> Electrical Conductivity (EC) Total Hardness <br /> pH Chemical Oxygen Demand(COD) <br /> Turbidity Volatile Organic Compounds (Short List) <br /> Dissolved Oxygen(DO) Chloride <br /> Total Dissolved Solids (TDS) <br /> Surface water samples are also analyzed for the following(COCs) every 5 years. <br /> VOCs (Extended List) Semi-VOCs <br /> Inorganics (Dissolved) Chlorinated Herbicides <br /> Polychlorinated Biphenols Organophosphorus Pesticides <br /> (PCBs) <br /> Organochlorine Pesticides <br /> North County RC&SL Public Works/Solid Waste <br /> 2nd Semester and Annual 2012 Groundwater Monitoring 4 County of San Joaquin—January 15,2013 <br />