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MONITORING AND REPORTING PROGRAM -4- <br /> SAN JOAQUIN COUNTY <br /> NORTH COUNTY SANITARY LANDFILL <br /> CLASS III LANDFILL <br /> SAN JOAQUIN COUNTY <br /> Sampling <br /> Report in & Reporting <br /> Parameter/Constituent Units of Frequency <br /> Sulfate mg/l Quarterly <br /> Dissolved Irons mg/l Quarterly <br /> Carbonate mg/l Quarterly <br /> Bicarbonate mg/l Quarterly <br /> Alkalinity mg/l Quarterly <br /> Nitrate (as N) mg/l Quarterly <br /> Sulfides (includipg H2S) presence or absence Quarterly <br /> Volatile Organics mg/l Annually <br /> Aluminum s mg/l Annually <br /> Antimonyl mg/l Annually <br /> Arsenic mg/l Annually <br /> Barium mg/l Annually <br /> Cadmiums mg/1 Annually <br /> Total Chromium (III+VI)s mg/l Annually <br /> Chromium (VI) mg/l Annually <br /> Copp?r mg/l Annually <br /> Lead mg/l Annually <br /> Magnesium mg/l Annually <br /> Manganese s mg/l Annually <br /> Mercury mg/l Annually <br /> Nickel mg/1 Annually <br /> Potassium mg/l Annually <br /> Selenium mg/l Annually <br /> Silver mg/l Annually <br /> Thalliums mg/l Annually <br /> Zincs mg/l Annually <br /> s Inductively Coupled Argon Plasma Atomic Emission Spectroscopy (ICRP) may be <br /> used for analysis of these constituents only. <br /> 2 EPA Methods 601 and 602, or EPA Method 624 shall be used. All peaks shall <br /> be reported. <br /> The Discharger shall determine at each sampling whether there is a statistically <br /> significant increase over water quality protection standards for each parameter <br /> and constituent analyzed. <br /> The ground water surface elevation (in feet and hundredths, M.S.L. ) in all wells <br /> shall be measured on a quarterly basis and used to determine the velocity and <br /> direction(s) of ground water flow. This information shall be displayed on a <br /> water table contour map and/or ground water flow net for the site. <br />