2009-03-02_HYDROLOGY - C1992080 - Laserfiche WebLink

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Permit No_ COG-850000 FacihtyNo_ COG- 0042 1 Page 1 b ALTERNATE LIMITATIONS FOR POST-MINING RECLAMATION AREAS Any discharge or increase in the volume of a discharge from a reclamation area, caused by precipitation within any 24-hour period greater than the 10-year 24-hour precipitation event (or snowmelt of equivalent volume) way substitute the following limitations for these specific parameters only, subject to burden of proof requirements described in Part LB.6 of the permit. Limitations Monitoring Sample Parameter 30-Day 7-Day Daily Rationale i Frequency Type Avg_ Avg_ Max. Federal Effluent Limitation Guidelines Settleable Solids ml/1 Report NA Report Federal ELG Weekly Grab Sediment Control Plan - Applicable to Reclamation Areas Served by Outfalls 001 and 002. The Sediment Control Plan requirements in Part LB.3_b. of the permit apply to the reclamation areas at this facility. The peimittee shall prepare and submit a Sediment Control plan by duly 1, 2009_ The Division will review the Sediment Control Plan and approve it_ Once approved by the Division, the Sediment Control Plan will become a part of this permit certification by reference. Compliance Schedule for Sediment Control Plan for ReclanuidionAreas Code 12505 A Sediment Control Plan shall be prepared and submitted by July 1. 2009 for the Reclamation Areas as required under Part 1.13_3_b_ of the CDPS General Permit for Coal Mining Facilities and 40 CFR 434.82- The plan required by this compliance schedule shall be directed to the industrial Unit of the Permits Section for final review- Code Erwif Description Permit Citation Due Date 12505 Submit Plan Submit Sediment Control Plan Part 1 B_3. b. 07101109 Other Conditions Anode anon Antidegradation review does not apply to this permit because limitations based on Water Quality Standards are not applied in this certification Groundwater Contamination If groundwater contamination is encountered then the petmittee is to contact the Division, cease all discharges, and if appropriate, contact the owner of the collection system receiving the discharge. Since the dischaW of contaminated groundwater is not covered under this permit, the permittee shall immediately apply for a groundwater remediation certification, which will include appropriate requirements for additional discharge monitoring and on-site environmental response capabilities- Sampling Sampling shall occur at a point after treatment, or aQer the implementation of any Best Management Practices (BMPs). If BMPs or treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee, and prior to entering the receiving stream or prior to discharge to land. Samples must be representative of what is entering the receiving stream. Monitorins! and Reporting Discharge Monitoring Reports (DMR) roust be submitted monthly as long as the certification is in effect- The permittee shall provide the Division with any additional monitoring data on the permitted discharge collected for entities other than the Division This will be supplied to the Division within 48 hours of the receipt of the data by the permittee_ Best Management Practices The permittee shall implement and maintain the Best Management Practices (BMP) for the prevention of erosion and the control of solid and liquid ;pollutants due to the discharge. BMPs include various options, such as: modification of the pipe discharge structure to disperse flows; containment of water by hay bales or other comparable structures; the use of geocloth, filter fabric, or plastic sheeting for protection of containment structures; rip-rap-, and/or any other approved methods. The General Permit for Coal Mining is attached and the permittee should review this perinit for familiarity with all of the permit requirements. If the permittee has questions related to this certification that cannot be answered by a review of the permit, the permit writer should be contacted Andrew J. Neuhart 303-692-3655 06116108