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PART I Page No. 3 Permit No. CO-0044776 ~: _ ::, PARTI A. DEFINITION OF EFFLUENT LIMITATIONS 1. Effluent Limitations Beginning no later than the effective date of this permit and lasting through February 29 2004, the permittee is authorized to discharge from outfalls 001 and 003 -the discharges of surface runoff; and 002 -the dischazge of surface runoff and/or mine drainage -- all prior to entering Deer Trail Ditch. In accordance with the Colorado Water Quality Control Commission Regulations for Effluent Limitations, Section 62.4 (5 CCR 1002-62), and the Colorado Dischazge Permit System Regulations, Section 61.8(2), (5 CCR 1002-61), the permitted discharge shall not contain effluent parameter concentrations which exceed the following limitations specified below or exceed the flow limitation, where specified. a. Outfalls 001 and 003 Effluent Parameter DischarEe Limitations 30-Day Avg Dail ax Flow, MGD Report Report Total Suspended Solids, mg/¢ 35 70 Total Iron, mg/¢ 3.0 6.0 Settleable Solids, m¢/¢ Report Report Oil aad Grease; mg/¢ Report 10 pH, s.u. (minimum-maximum) N/A 6.5-9.0 ALTERNATE LIMITATIONS Any dischazge or increase in the volume of a dischazge caused by precipitation within any 24-hour period less than or equal to the 10-year. 24-hour prgcipitatioti event (or snowmelt of equivalent volume) may comply with the following limitations subject to burden of proof requirements described in Part I.A.2. Effluent Parameter DiscbarPe LLtations 30-Dam ail a Flow, MGD Report Report Total Suspended Solids, mg/¢ Report Report Totai Iron, mg/¢ Report Report Settleable Solids, m¢/¢ Report 0.5 Oil and Grease, mg/¢ Report 10 pH, s.u. (minimum-maximum) N/A 6.5-9.0 Any dischazge or increase in volume of a dischazge caused by precipitation within any 24-hour period greater than the - ea 24-hour event (or series of storms or snowmelt of equivalent volume) may comply with the following limitations subject to burden of proof requirements described in Part I.A.2. Effluent Parameter Discharee Limitations 30-Dav Av¢ Daily Max Flow, MGD Report Report Total Suspended Solids, mg/¢ Report Report Total Iron, mg/¢ Report Report Settleable Solids, m¢/¢ Report Report Oil and Grease, mg/¢ Report 10 pH, s.u. (minimum-maximum) N/A 6.5-9.0 See Part I.C. for Definitions.