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<br />Table A2. Continued. <br /> <br /> <br />Parameter <br /> <br />Unit <br /> <br />Method 1974 <br />EPA <br />Methods <br />Page No. 14th Ed. <br />Standard <br />Methods <br />Page No. <br />Carbonate mg/1 Titration 278 --- <br />Chloride mg/1 Silver nitrate, mercuric nitrate, or automated --- 303 <br /> clorimetric 29 304 <br /> 31 613 <br />Chromium, VI mg/1 Extration and atomic absorption, colorimetric 89 --- <br /> 105 192 <br />Copper mg/1 Digestion followed by atomic absorption or 108 148 <br /> colorimetric --- 196 <br />Rluoride mg/1 Distillation followed by ion electrode, --- 389 <br /> SPANDS, or automated complexone 65 391 <br /> 59 393 <br /> 61 164 <br />Gross Alpha <br />Radioactivity pCi/1 Scintillation counter --- 641 <br />Grose Beta <br />Radioactivity pCi/1 Scintillation counter --- 642 <br />Iron mg/1 Digestion followed by atomic absorption or 110 148 <br /> colorimetric --- 208 <br />Lead mg/1 Digestion followed by atomic absorption or 112 148 <br /> colorimetric -- 215 <br />a <br />w <br />