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PART I Page v Permit No. CO-0000396 A. TERI`SS AND CONDITIONS 1. Effluent Limitations [continued) (d) Outfa11004 Effluent Parameter Discharge Limitations 30-Dav Av¢ 7-Dar AvQ Daily Max Flow, MGD Report N/A Report BOD„ mg/l 30 45 N1A Total Suspended Solids, mg/l 35 N/A 70 Fecal Coliform, No./100 ml 2000 4000 N/A Total Residual Chlorine, mg/! N/A N/A 0.5 Total Imo, mg/f 3.5 N/A 7.0 pH, s. u. (minimum-maximum) N/A N/A 6.SA.0 Oil and Crrrase, mg/[ N/A N/A 10 WET, Aatte N/A N/A LCSO > l00% 2. Burden of Proof Requirements The permittee has the burden of proof when seeking relief from total suspended solids (T'SS), total iron and/or settleable solids (SS) limitations. Outfafls 001, 002, 003, 005, 006, 007, 008, 009, 025 and 028 are eligible for relief. The remaining permitted ou[Calls are not eligible. Relief may be granted for each discharge occurrence only when necessary and shall not be granted when the permittee haz control over the discharge. The permittee should endeavor to meet the primary limitations whenever possible. The permittee will nerd to show that ezceedence of the applicable limitations was caused by precipitation and no other source and that the discharge was beyond their control. a) For rainfall. to waive TSS and total iron limitations, it is necessary to prove that discharge occurred within 48 hours ~' after measurable procipitatioo has stopped. In addition, to waive serileable solids limitations, it is necessary to prove that discharge occurred within 48 hours after precipitation greater Chao the 10-year, 24-hour event has stopped. b) For snowmelt. to waive TSS and total iron limitations, it is necessary to prove [bat discharge occurred within 48 hours after pond inflow has stopped. In addition, to waive settleable solids (imitations, it is necessary to prove that discharge occumd within 48 hours after pond inflow volume greater than the 10-year, 24-hour event has stopped. Should a precipitation event or snowmelt occur, the permittee shall submit adequate proof.in order (or an exemption to be. claimed. Said proof shall be submitted az an attachment to the Disrharge Monitoring Report (DMR) for the appropriate period. TLe Division shall determine the adequacy of proof. As part of this determination, the Division shall eva]uate whether the permittee could have controlled the discharge in such a manner that primary limitations could have been met. All mantel dewateriog of the ponds shall meU TSS and total iron limitations. 3. Post-Mining Armes Cornateacing at the time active mining has ceased and surface areas have been returned to the required contour all applicable discharges [nay be eligible Cor limitations other than those specified in Parts I.A.2. and I.A.3. These post-mining limitations shall remain in effect until bond release. The permitlee shall notify the Division upon cessation of active mining so that consideration of appropriate permit modifications can be made. Ste Part I.C. for Definitions.