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PART I <br />Page No. 5 <br />Permit No. COG-850000 <br />B. EFFLUENT LIIIIITATIONS AND MONITORING REQUIREMENTS • <br />1. Effluent Limitations <br />a. Active Minine Outfalls (continued) <br />ACTIVE MINING ALTERNATE LIMITATIONS (continued) <br />Any discharge or increase in the volume of a discharge caused by precipitation within any 24-hour period <br />erecter than the 10-veaz. 24-hour orecioitation event (or snowmelt of equivalent volume) may comply with <br />the following limitations -- subject to burden of proof requiremmrs described in Part I.B.I.d). <br />Parameter Lim itation <br /> 30-Day Avg. Daily Max. <br />Flow, MGD Report Report <br />Total Suspended Solids, mg/f Report Report <br />Total Iron, mglP Report Repon <br />Settleable Solids, mP/P Report Report <br />pH, s.u. N/A 6.5-9.0 <br />Oil and Grease, mg/P N/A 10 <br />Total Dissolved Solids, mg/P Report Report <br /> <br />CO River Basin Only • <br />Total Phosphoru (az P), mg/P <br />Dillon Reservoir and T pper Beaz Creek Drainages ONLY Report Report <br />b. Post-Minine Outfalls <br />Post-mining limitations may apply to oudalls serving surface areas which have been returned to the required <br />contour and on which revegetation (specifically, seeding or planting) work has commenced. The permittee <br />may request consideration for change from active mining limitations to post-mining limitations when these <br />conditions have bern met. <br />POSE-MIIVING PRIMARY LIMITATIONS <br />Parameter Limitation <br />~ Flow, MGD Report <br />Settleable Solids, mP/P 0.5 <br />pH, s.u. 6.5-9.0 <br />Oil and Grease, mg/P 10 <br />Total Dissolved Solids, mg/P Report <br />CO River Basin ONLY <br />Total Phosphorus (az P), mgJf Report • <br />Dillon Reservoir and pper Bear Creek Drainages ONLY <br />See Part I.C. for DeFinitions <br />