2017-05-11_PERMIT FILE - C1981012 (18)

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In TRIM COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division Fact Sheet- Page 3, Permit No. C00000906 • New outfall designations (outfalls 010, 011, and 012) were added to the permit for existing discharges. • Monitoring requirements for total arsenic, dissolved cadmium, total recoverable chromium, dissolved copper, dissolved manganese, total mercury, dissolved selenium, dissolved zinc, boron and chloride are applicable to outfalls 007, 008, and 010. • Iron limitations are more stringent at outfalls 007, 008 and new at 010 due to the application of WQBELs. Compliance schedules with interim limitations are included for 007, 008 and 010. • New permit limitations and a delayed effective date are applicable to outfalls 007 and 008 for WET testing. B. Stormwater discharges from Outfalls 004, 007, 008, 010, 011, and 012 Stormwater discharges authorized under general permit certification COR040192 for the New Elk Mine facility were combined into this renewal permit; the division will terminate certification COR040192 on the effective date of the renewal permit. Changes to the requirements associated with this stormwater certification are provided below. • The effluent limitations applicable to stormwater are located in a section separate from the Stormwater Management Plan (SWMP). • A section titled Narrative Water Quality Based Effluent Limitations was added to the permit for clarity. • The practice -based effluent limitations (PBELs) for stormwater discharges were modified to include the following PBELs: Minimize Exposure; Salt Storage Piles or Piles Containing Salt; Waste, Garbage and Floatable Debris; Dust Generation and Vehicle Tracking of Industrial Materials; and Management of Runoff. • A new section titled Specific Monitoring Requirements was added to the permit that addresses the requirements for WET testing. • The term "control measure" is used throughout instead of "Best Management Practice (BMP)", and requirements for installation and implementation specifications and control measure maintenance has been included. • The self -inspection requirements were modified. • A new section titled Corrective Actions was added to the permit that identifies permittee responsibilities with respect to resolving specific facility conditions associated with stormwater discharges. • Several general SWMP requirements were added related to preparing, maintaining, and keeping the SWMP current; including specific SWMP requirements related to the facility map and pollutant source inventory and assessment, and documentation requirements. • Stormwater-specific provisions were added in the General Monitoring and Sampling Requirements section of the permit and to the Reporting and Recordkeeping section.