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PART I <br />Page No. 5 <br />Permit No. COG-850000 <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />1. Effluent Limitations <br />a. Active Minine Outfalls (continued) <br />ACTIVE MINING ALTERNATE LDiIITATIONS (continued) <br />Any dischazge or increase in the volume of a dischazge caused by precipitation within any 24-hour period <br />¢reater than the 10-veaz. 24-hour precipitation event (or snowmelt of equivalent volume) ">~ comply with <br />the following limitations -- subject to burden of proof requirements described in Part I.B.I.d). <br />Parameter Lim <br />30-Day Avg. itation <br />Daily Max. <br />Flow, MGD Repon Repon <br />Total Suspended Solids, mg/P Repon Report <br />Total Iron, mg/P Report Repon <br />Settleable Solids, mP/P Report Report <br />pH, s.u. N!A b.5-9.0 <br />Oil and Grease, mg/P N/A 10 <br />ToW Dissolved Solids, mg/P Report Report <br />CO River Basin Only <br />Total Phosphorus (as P), mg/P <br />Dillon Reservoir and Upper Beaz Creek Drainages ONLY Report Repon <br />b. Post-Minine Outfalls <br />Post-mining limitations tray apply to outfalls serving surface azeas which have been returned to the required <br />contour and on which revegetazion (specifically, seeding or planting) work has commenced. The permittee <br />may request consideration for change from active muting litttitations to post-mining limitations when these <br />conditions have bern met. <br />POST-MINING PRIMARY LIMI'T'ATIONS <br />Parameter Limitation <br />Flow, MGD Report <br />Settleable Solids, mP/P 0.5 <br />pH, s.u. <br />Oil and Grease, mg/P <br />Total Dissolved Solids, mg/P <br />CO River Basin ONLY <br />Total Phosphorus (as P). <br />Dillon Reservoir and U <br />6.5-9.0 <br />10 <br />Repon <br />P Repon <br />Bear Creek Drainages ONLY <br />See Part I.C. for Definitions <br />