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Parameter <br />Settleable Solids, m1/1 <br />Code Event <br />12505 Submit Plan <br />Other Conditions <br />ALTERNATE LIMITATIONS FOR POST - MINING RECLAMATION AREAS <br />Any discharge or increase in the volume of a discharge from a reclamation area, caused by precipitation within any 24 -hour <br />period greater than the 10 -year, 24 -hour precipitation event (or snowmelt of equivalent volume) may substitute the following <br />limitations for these specific parameters only, subject to burden of proof requirements described in Part I.B.6 of the permit. <br />Limitations <br />30 -Day 7 -Day Daily Rationale <br />Avg. Avg. Max. <br />Federal Effluent Limitation Guidelines <br />Report NA Report Federal ELG <br />Monitoring Sample <br />Frequency ' Type <br />2 days/ <br />month <br />Permit No. COG - 850000 <br />Facility No. COG - 850036 <br />Page lb <br />Grab <br />Sediment Control Plan - Applicable to Reclamation Areas Served by Outfall 001. <br />The Sediment Control Plan requirements in Part I.B.3.b. of the permit apply to the reclamation areas at this facility. The permittee <br />shall prepare and submit a Sediment Control plan by July 1, 2009. The Division will review the Sediment Control Plan and approve <br />it. Once approved by the Division, the Sediment Control Plan will become a part of this permit certification by reference. <br />Compliance Schedule for Sediment Control Plan for Reclamation Areas <br />Code 12505 A Sediment Control Plan shall be prepared and submitted by July 1, 2009 for the Reclamation Areas as required under <br />Part I.B.3.b. of the CDPS General Permit for Coal Mining Facilities and 40 CFR 434.82. The plan required by this compliance <br />schedule shall be directed to the Industrial Unit of the Permits Section for final review. <br />Description Permit Citation Due Date <br />Submit Sediment Control Plan Part 1.B.3.b. 07/01/09 <br />Antidegradation <br />Antidegradation review does not apply to this permit because limitations based on Water Quality Standards are not applied in this <br />certification. <br />Groundwater Contamination <br />If groundwater contamination is encountered, then the permittee is to contact the Division, cease all discharges, and if appropriate, <br />contact the owner of the collection system receiving the discharge. Since the discharge of contaminated groundwater is not <br />covered under this permit, the permittee shall immediately apply for a groundwater remediation certification, which will include <br />appropriate requirements for additional discharge monitoring and on -site environmental response capabilities. <br />Sampling <br />Sampling shall occur at a point after treatment, or after the implementation of any Best Management Practices (BMPs). If BMPs or <br />treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee, and prior to entering the <br />receiving stream or prior to discharge to land. Samples must be representative of what is entering the receiving stream. <br />Monitoring and Reporting <br />Discharge Monitoring Reports (DMR) must be submitted monthly as long as the certification is in effect. The permittee shall provide <br />the Division with any additional monitoring data on the permitted discharge collected for entities other than the Division. This will be <br />supplied to the Division within 48 hours of the receipt of the data by the permittee. <br />Best Management Practices <br />The permittee shall implement and maintain the Best Management Practices (BMP) for the prevention of erosion and the control of <br />solid and liquid pollutants due to the discharge. BMPs include various options, such as: modification of the pipe discharge structure to <br />disperse flows; containment of water by hay bales or other comparable structures; the use of geocloth, filter fabric, or plastic sheeting <br />for protection of containment structures; rip -rap; and /or any other approved methods. <br />The General Permit for Coal Mining is attached and the permittee should review this permit for familiarity with all of the permit <br />requirements. If the permittee has questions related to this certification that cannot be answered by a review of the permit, the permit <br />writer should be contacted. <br />Andrew J. Neuhart <br />303 - 692 -3655 <br />06/24/08 <br />