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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0148 j <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 21 <br /> Evaluation of cooling tower discharges on ground water quality using the designated level <br /> methodology (DLM); comparison of maximum value detected in samples with the DLM values for <br /> septic sstems less than 30 feet above ground water using attenuation factor of 10. <br /> Designated <br /> level <br /> Maximum methodology Corresponding Source of water <br /> Parameter Units value detected value water quality quality goals <br /> in effluent goal <br /> (10 attenuation <br /> factor <br /> Bicarbonate alkalinity (as mg/L 220 None None None <br /> CaCO3 <br /> Boron m /L 1.5 14 1.4 IRIS' <br /> Calcium m /L 22 None None None <br /> Carbonate alkalinity (as mg/L 190 None None None <br /> CaCO3) <br /> Chloride m /L 144 Not applicable 250 CA secondary MCLS <br /> Chromium total m /L 0.003 0.5 0.05 CA primary MCL <br /> Chromium hexavalent m /L 0.0067 0.21 0.021 IRIS <br /> Copper m /L 0.0083 13 1.3 CA primary MCL <br /> Fluoride m /L 0.62 20 2 CA prirnwy MCL <br /> Iron mg/L 0.055 3 0.3 CA secondary MCL <br /> Magnesium m /L 0.73 None None None <br /> .Molybdenum m /L 0.031 0.35 0.035 IRIS <br /> Nitrate (as N) m /L 0.4 Not applicable 10 CA primary MCL <br /> Nitrate (as NO3) mg/L 1.8 Not applicable 45 CA primary MCL <br /> continued <br />