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Groundwater samples are analyzed every 5 years for the following constituents of concern (COC): <br /> Volatile Organic Compounds (EPA 624) <br /> Semi Volatile Organic Compounds <br /> Organochlorine Pesticides, PCBs <br /> Chlorophenoxy Herbicides <br /> ICP Metals (26 metals) <br /> The next groundwater COC monitoring event will occur in the first quarter of 2010. <br /> Surface Water <br /> Surface water samples are collected after the first storm of the rainy season that produces significant <br /> flow and quarterly thereafter when water is flowing. Samples are collected from monitoring point <br /> S-1 (upstream) and monitoring point S-2 (downstream) of the landfill (Figure 2). <br /> Surface water samples are analyzed for the following quarterly monitoring and field parameters: <br /> Temperature <br /> EC <br /> pH <br /> Turbidity <br /> TDS <br /> Chloride <br /> Surface water samples are analyzed annually for the following additional parameters: <br /> Sulfates <br /> Nitrate -Nitrogen <br /> Total Kjeldahl Nitrogen <br /> Chemical Oxygen Demand <br /> Dissolved Oxygen <br /> Surface water samples are analyzed every 5 years for-the following constituents of concern (COC): <br /> ICP Metals (26 metals) <br /> The next surface water COC monitoring will occur during the fourth quarter of 2009. <br /> Harney Lane Sanitary Landfill Department of Public Works/Solid Waste <br /> 2nd Quarter 2007 Groundwater Monitoring Report County of San Joaquin—July 15,2007 <br /> 3 <br />