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PARTI Page No. S Permit No.: CO-0044776 • eligible for relief from TSS, total iron and SS, as applicable; however, the majority of the loading from any discharge has to consist of storm mnoff for the relief to be available. The pernuttee will need to show that exceedance of the applicable limitations was caused by precipitation (surface rnnoffwater) and not mine water, through a comparison ofthe loading from each source. • 4. Post-Minine Areas Relief maybe granted for each discharge occurrence only when necessary and shall not be granted when the pennittee has control over the discharge. The permittee should endeavor to meet the primary limitations whenever possible. a. For active outfalls: For rainfall, to waive TSS and total iron limitations, it is necessary to prove that discharge occurred within 48 hours after measurable precipitation has stopped. In additioq to waive settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after precipitation greater than the 10-yeaz, 24-hour event has stopped. For snowmelt, to waive TSS and total iron limitations, it is necessary to prove that dischazge occurred within 48 hours after pond inflow has stopped. In additioq to waive settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after pond inflow volume greater than the 10-yeaz, 24-hour event has stopped. b. For post-minine outfalls: For rainfall, to waive settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after measurable precipitation has stopped. For snowmelt, to waive settleable solids limitations, it is necessary to prove that dischazge occurred within 48 hours after pond inflow has stopped. Should a precipitation event or snowmelt occur, the perntittee shall submit adequate proof in order for an exemption to be claimed. Weather station data maybe appropriate in making this demonstration. Said proof shall be submitted as an attachment to the Dischazge Monitoring Report (DMR) for the appropriate period. The Division shall determine the adequacy of proof. As part of this determinatioq the Division shall evaluate whether the pennittee could have controlled the dischazge in such a manner that primary limitations could have been met. All manual dewatering of ponds that are equipped with automafic dewatering systems must meet TSS and total iron limitations. If a pond has only manual dewatering capability, relief is available only to the extent required to regain necessary stability and capacity. In conformance with 40 CFR 434.50, commencing at the time active min; -g has ceased and all surface areas served by a sedimentation pond have been returned [o the regtiued contour and revegetation has commenced, applicable discharges may be eligible for post-mining limitations. In most cases, these post-mining limitations shall remain in effect until bond release. The pemilttee shall notify the Division at [he appropriate three so that consideration of permit modifications can be made. Prior to notification and subsequent permit modification, active [Wining limitations will apply regazdless of actual mine status. 5. Comuliance Schedules a. Twelve Time Analysis - Outfa11006: The pernilttee shall complete a twelve time analysis as described in Part LB.3. Twelve consecutive monthly grab samples shall be collected at outfall 006 and analyzed with all results being submitted at the end of the sampling period. A summary report in the form of a letter shall be submitted to the Permits Unit by October 31, 2005. The perndttee may attach the laboratory results if they choose. This report shall include all sample results collected over the twelve month period. If the series of sampling is incomplete, this shall be noted in the report. If sampling has not yet been completed by October 31, 2005, this twelve time analysis requirement shall continue until twelve samples have been collected and analyzed and the results submitted to the Permits Unit. Monitoring results for the same parameters previously collected (1998 and more recent) maybe substituted for future monitoring results.