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PART I <br />Page 5 <br />Permit No. COG-850000 <br />• <br />B. EFFLIIENT LIMTTATIONS AND MONITORING REQQIREMENTS <br />1. Bffluent Limitations <br />(a) Active Mining (Continued) <br />Any discharge or increase in the volume of a discharge caused by <br />precipitation within any 24-hour period eater than the 10- ear <br />24-hour precipitation event (or anowmelt of equivalent volume <br />comply with the following limitations subject to burden of <br />proof requirements described is Part I.B.l.d). <br />Flow, MGD --monitoring only per Part I.B.2.a <br />Total Dissolved Solids, mg/1 - monitoring only per Part I.B.2.a <br />(Colo. River Hasin Only) <br />Total Phosphorus (ae P), mg/1 - monitoring only per Part I.B.2.a. <br />(Dillon Reservoir drainage only) <br />pH shall remain between 6.5 and 9.0 e.u. c/. <br />011 and grease shall not ezceed 10 mg/1 c7 nor shall there be a <br />visible sheen f/. <br />(b) Poat-Mining <br />• Effluent Parameter Discharge Limitations <br />Mazimum Concentration <br />Daily Mazimum c/ <br />Flow, MGD Report <br />Settleable Solids, ml/1 h/ 0.5 <br />Total Dissolved Solids, mg/1 (Colorado River Basin Only) Report <br />Total Phosphorus (as P), mg/1 (Dillon Reservoir Drainage Only) Report <br />pH shall remain between 6.5 sad 9.0 s.u, c/. <br />Oil and grease shall not ezceed 10 mg/1 c/ nor shall there be a visible sheen f/ <br />Any discharge or increase in the volume of a discharge caused by <br />precipitation within any 24-hour period renter than the 10- ear <br />24-hour precipitation event (or anowmelt of equivalent volume <br />comply with the following limitations subject to burden of proof <br />requirements described in Part I.H.l.d). <br /><- Flow, MGD - monitoring only per Part I.B.2.b <br />Total Dissolved Solids, mg/1 - monitoring only per Part I.B.2.b <br />(Colo. River Basin Oaly) ' <br />Total Phosphorus (as P), mg/1 - monitoring only per Part I.B.2.b. <br />(Dillon Reservoir drainage only) <br />pH shall remain between 6.5 and 9.0 e.u. c/. <br />• 011 and grease shall not ezceed 10 mg/1 c7 nor shall there be a <br />visible sheen f/. <br />See part I.B.3. for Footnotes <br />