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~ Q <br />Table 1. Regression equations relating total and total recoverable metal con- <br />centrations. For explanation of equations, see text. The "r" <br />indicates the expected accuracy of the estimated total recoverable <br />value, with r=1.0 being a perfect estimate. Concentrations are in <br />mg/l. <br />Regression Eq uation r <br />FeTR = 0.5786 FeT - 0.0568 0.948 <br />CUTR = 0.3753 CuTR + 0.0012 0.743 <br />AgTR = 0.3409 AgT - 0.000005 0.858 <br />ZnTR = 0.6292 ZnT - 0.0109 0.900 <br />*H9TR = 0.4810 HgT - 0.000003 <br />*The equation for mercury is not based on historical data, but was developed <br />using methods described in the text. <br />No total versus total recoverable data exists for mercury. However, a <br />regression equation was estimated using the average regression coefficients <br />"a" and "b" for copper, zinc, silver and iron. The average "b" was found by <br />using the average of the ratio of the regression constant "b" to the stream <br />standard. <br />The regression equations were used to estimate what total recoverable <br />metals values would have been if total recoverable metals had been sampled at <br />CYCC's discharge points. Table 2 lists metal excursions at CYCC's discharge <br />points from 1984 to the present in the left hand column. The right hand <br />column gives the corresponding estimated total recoverable value obtained <br />using the regression equation. <br />Table 3 lists total and total recoverable data used in the regression <br />analysis. <br />