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• <br />Table 17-17 <br />Individual Computations for Same~Day (Non-Irrigation Season) <br />Impact Analyses for Mine Discharges to Tuttle Draw <br />San Miguel plus Calamity and background Tuttle ' <br />984 + 79,9 + .71 1,004.6 = 457 mg/1 <br />(1,618.2) x .00136 2.2 <br />Total background tonnage in San Miguel below Tuttle <br />815.6 cfs x 457 mg/1 x .0027 = 1,006.4 tons <br />San Miguel plus combined background and mine flow from Tuttle <br />984 + 19.9 + 4.1 = 1,008 = 458 mg/1 <br />(1,618.9) x ,00136 2.2 <br />458 - 457 = mg/1, 1 = .2 percent increase in TDS <br />• 457 <br />• <br />Natural ground water component appears to be insignificant, possible error because had to <br />estimate upstream flow on San Miguel <br />17-66 Revised 04/11/88 <br />