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RECEIVED JUL 0 1 200B <br />Permit No. COG-850000 <br />Facility No. COG-850001 <br />Page lb <br />ALTERNATE LIMITATIONS FOR ALKALINE MINE DRAINAGE AND COAL PREPARATION AREAS <br />Any discharge or increase in the volume of a discharge from an above around alkaline mine (or an underground alkaline mine where <br />the effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24-hour period <br />less than or equal to the 10- ear, 24-hour precipitation event (or snowmelt of equivalent volume) mU substitute the following <br />limitations for these specific parameters only, subject to burden of proof requirements described in Part I.B.6. <br />-M-9 U-11,019111 <br />Ltut8tlQns s s, ?v10I11tDIlnP?' v. r <br />Parameter0 Day l}? ?Darly :' r g? rum <br />Freucnc?+t g <br />'1W -iA <br />Federal Effluent Limitation Guideline <br />Total Suspended Solids, mg/1 Report NA Report Federal ELG Weekly Grab <br />Any discharge or increase in the volume of a discharge from an above around alkaline mine (or an underground alkaline mine where <br />the effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24-hour period <br />greater than the 10-year, 24-hour precipitation event (or snowmelt of equivalent volume) may substitute the following limitations for <br />these specific parameters only, subject to burden of proof requirements described in Part I.B 6 <br />' 7 IN r'=s ?: ` y?tatons i& Monitoring Sample <br />Parameter 30 Day- `7-Day D?rly ationale <br />Frequency V T}?pe <br />Avg _V <br />u t' <br />Federal Effluent Limitation Guidelines <br />Total Suspended Solids, mg/1 Report NA Report Federal ELG Weekly Grab <br />Settleable Solids, ml/1 Report NA Report Federal ELG Weekly Grab <br />Other Conditions <br />Antidegradation <br />An antidegradation review applies to this discharge as the receiving stream is classified as Undesignated. As outlined in the permit and <br />rationale to this general permit, the antidegradation based limitations are calculated as 15% of the applicable water quality standard. <br />The only parameter subject to an antidegradation review is total recoverable iron. As this limit based on the WQS is more stringent <br />than that contained in the previous permit, there is no new or increased impact to the receiving water and therefore the WQS will be <br />applied in the permit. <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 />SamnlinQ <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 />Permit Writer <br />Andrew J. Neuhart <br />303-692-3655 <br />June 25, 2008