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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0148 <br /> LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND <br /> THE U.S. DEPARTMENT OF ENERGY FOR <br /> LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 <br /> SAN JOAQUIN AND ALAMEDA COUNTIES <br /> ATTACHMENT 16 <br /> Evaluation of cooling tower and mechanical equipment discharges threat to groundwater quality using the <br /> designated level methodology (DLM); comparison of maximum value detected in samples with the DLM values <br /> for disposal units (percolation pits or septic systems) using attenuation factor of 100 for systems more than 30 <br /> feet above ground water. <br /> Designated level Corresponding <br /> Parameter Units Maximum value methodology water quality Source of wager <br /> detected in effluent value goal' quality goal <br /> Aluminum m /L 0.25 100 1 CA primary MCLb <br /> Bicarbonate alkalinity (as mg/L 220 None None None <br /> CaCO3 <br /> Boron m /L 2.2 140 1.4 IRIS <br /> Calcium mg/ 22 None None None <br /> Carbonate alkalinity (as mg/L 800 None None None <br /> CaCO3) <br /> Chloride mg/ 210 Not applicable 250 CA secondary MCL <br /> Chromium total m /L 0.0072 5 0.05 CA primary MCL <br /> Chromium hexavalent m /L 0.0067 2.1 0.021 IRIS <br /> Copper m /L 2.4 130 1.3 CA primary MCL <br /> Fluoride m /L 1.1 200 2 CA primary MCL <br /> Hydroxide alkalinity (as mg/L 120 None None None <br /> CaCO3 <br /> Iron m /L 2.3 30 0.3 CA secondary MCL <br /> Lead m /L 0.0077 1.5 0.015 CA primary MCL <br /> Magnesium m /L 1.4 None None None <br /> Manganese Mg/ 0.2 5 0.05 CA secondary MCL <br /> Molybdenum m /L 0.045 3.5 0.035 IRIS <br /> continued <br />