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(:OI.OIIAUO DI?PAR'fPll?IJ'1' OF IIEAI.171, {Dater Qualify Control Division <br />Rationale - Page 3. Permit Nu. CO-00002].3 <br />• API'ENUIX A <br />!Dater quality standard ({J12S) based effluent .llmltations are calculated using <br />Chc fullowing mass balance formula: <br />Ii I. WQS (Q7-111 ~I~ QE~'Ir) <br />QI?FF <br />Where: <br />F.I. ° Ca lcul.ated effluent limitation (mg/1) <br />1JQS Apl~llcnble water quality standard (mg/1) <br />Q7-.lU Rer.eivJ.ng water 7-day, ].0-year low flow (7.0 cfs) <br />QEFF Maximum effluent flow (1.14 cfs) <br />1. Total Recoverable Copper: <br />EL ~ 0.018 (7.0 + 1.14) 0.13 mg/1 <br />1.14 <br />2. T.R. Iron: <br />. EL 1.0 (7.0 + 1.14) ° 7,14 mg/1 <br />1.14 <br />3. T.R. Manganese: <br />EL ° 1.0 (7.0 + 1.14) ° 7,14 mg/1 <br />1.14 <br />4. T.R. Zinc: <br />EL ° 0.085 (7.0 + 1.14) ° 0.61 mg/1 <br />1.14 <br />5. 'T.R. Cadmium: <br />EL ~ 0.001 (7.0 + 1.14) ° 0.001 mg/1 <br />1.14 <br />6. T.R. Silver: <br />EL ~ 0.0001 (7.0 + 1.14) - 0.0007 mg/1 <br />1.14 <br />J <br />7-6-35 <br />