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Ratio of Calculated Sum of Dissolved Solids to Specific Conductance <br /> The sum of dissolved solids divided by the specific conductance should fall within <br /> the range 0.55 to 0.811. The ratio of the calculated sum of dissolved solids <br /> (mg/L) to specific conductance is calculated as follows: <br /> Sum of dissolved solids in mq/L <br /> Specific Conductance <br /> The calculated sum of dissolved solids requires analysis of the major cations and <br /> anions. Major cations and anions were not analyzed in 3rd Quarter 2009. <br /> Therefore, the sum of dissolved solids and the ratio to specific conductance <br /> could not be evaluated this quarter. The ratio will be evaluated in future quarters <br /> when the required constituents are analyzed. <br /> Friedman, L.C., and Erdmann, D.E., 1982, Quality assurance practices for the chemical and biological <br /> analyses of water and fluvial sediments: U.S. Geological Survey Techniques of Water-Resources <br /> Investigations, book 5, chap.A6, 181 p. <br /> - E-4 - <br />