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1 <br />1 <br />Additionally, in accordance with the revised Report of Waste Discharge (May 27, 2005), wells <br />G-4, G-5, and G-6 are sampled for VOCs quarterly. Those analytical results are included in the <br />semi-annual reports. <br />' Groundwater samples are analyzed every 5 years for the following constituents of concern <br />(COCs): <br />Total Organic Carbon (TOC) Semi -VOCs <br />Inorganics (Dissolved) Chlorophenoxy Herbicides <br />' VOCs (Extended List) Organophosphorus Compounds <br />0 <br />1 <br />1 <br />.I <br />Monitoring well elevations are taken quarterly and well hydrographs are included in the second <br />semester and annual report as directed by the current WDRs. These figures present the following <br />elevations: <br />❑ Groundwater for each quarter <br />❑ Top and bottom of well screen <br />❑ Pump intake <br />Surface Water <br />Surface water is sampled upstream of the waste management facility at background monitoring <br />points S-1 and S-2 and downstream at monitoring point S-4 (Figure 3) when water is flowing. <br />Samples are collected after the first storm of the rainy season that produces significant flow, and <br />quarterly thereafter when water is flowing. <br />Surface water samples are analyzed for the following quarterly field and monitoring parameters: <br />Temperature <br />EC <br />pH <br />Turbidity <br />TDS <br />Total Suspended Solids (TSS) <br />Carbonate <br />Bicarbonate <br />Chloride <br />Nitrate -Nitrogen <br />Sulfate <br />Calcium <br />Magnesium <br />Potassium <br />Sodium <br />VOCs (Short List) <br />1 Surface water samples are also analyzed for the following (COCs) every 5 years. <br />10114 <br />Oil and Grease <br />Chemical Oxygen Demand <br />Dissolved Oxygen <br />North County RCSL <br />' 2nd Semester and Annual 2005 Groundwater Monitoring <br />VOCs (Extended List) <br />Semi -VOCs <br />Chlorophenoxy Herbicides <br />Organophosphorus Compounds <br />4 Public Works/Solid Waste <br />County of San Joaquin — January 24, 2006 <br />