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002 <br />Storm and pit <br />dewatering <br />Settling Pond <br />38 °17'53 " / 108° 35'38" <br />2.297 MG <br />Coal Canyon —San <br />Miguel <br />003 <br />Storm and pit <br />dewatering <br />Settling Pond <br />38 °18'12 " / 108° 35'35" <br />2,460 MG <br />Coal Canyon- San <br />Miguel <br />Ontfalls <br />This certification specifically authorizes Western Fuels- Colorado, LLC to discharge from the New Horizon North Mine, <br />as described below and in accordance with the General Pennit for Goal Mining Facilities (Surface Runoff). <br />All correspondence relative to this facility should reference the specific facility number, COG - 850062. <br />Permitlee <br />Western Fuels - Colorado, LLC. <br />PO Box 33424 <br />Denver, CO 80233 <br />Project Name, Activity and Location <br />New Horizon North Mine The facility is a surface coal mine and associated activities include topsoil removal, overburden stripping, <br />coal extraction and reclamation. The discharge is from storm and pit dewatering. The facility is located at 2600 Road and AA Road in <br />Nucla (Montrose County) Colorado 81424. <br />Outfalls <br />001 <br />Storm and pit <br />dewatering <br />Colorado Discharge Permit System Regulations <br />CERTIFICATION <br />under <br />GENERAL PERMIT FOR COAL MINING FACILITIES (SIC NO: 1222) <br />Category 07, Sub - category 5, General Permits, Current fee $780 /year (CRS 25 -8 -502) <br />Source Treatment <br />Lat/Long <br />Settling Pond 38 °17'26 " / 108° 35'30" <br />Facility Contact <br />Chris McCourt, Director of Technical Services <br />Phone: 303 - 254 -3076 <br />Email: Chris@westernfuels.org <br />Facility Contact: Ross Gubka, Chief Engineer <br />Phone: 970-864-2165 <br />Effluent Parameters <br />The discharges are to tributaries of the San Miguel within Segment 09 of the San Miguel Sub- basin, Gunnison River Basin, found in the <br />Classifications and Numeric Standards for the Gunnison and Lower Dolores River Basin (Regulation No. 35; last update effective <br />6/30/10). Segment 09 is Undesignated, and is classified for the following beneficial uses: Aquatic Life, Class 1 Cold; Recreation Class E; <br />Agriculture, and Water Supply. <br />Permit Limitations and Monitoring Requirements for Alkaline Drainage, Coal Preparation Plants and Coal Preparation Plant <br />Areas, and Western Alkaline Mining Areas, Outfall 001 -003 <br />Limitations <br />Parameter <br />Flow, MGD <br />pH, s.u. <br />Oil and Grease, mg/l <br />Total Suspended Solids, m1/1 <br />Total Iron, mg/I <br />Existing Sources (before 5/4/84) 3.5 <br />New Sources (after 5/4/84) 3.0 <br />Settleable Solids, ml/1 <br />30 -Day 7 -Day Daily Rationale <br />Avg. Avg. Max. <br />General Permit Requirements <br />Report NA Report <br />N/A <br />N/A <br />Federal Effluent Limitation Guidelines <br />35 NA 70 <br />NA <br />NA <br />Report NA <br />7.0 <br />6.0 <br />Discharge Evaluation <br />NA 6.5 -9.0 Water Quality Standards <br />NA 10 State Effluent Regulations <br />Federal ELG <br />Federal ELG <br />Federal ELG <br />05 Federal ELG <br />3.558 MG <br />Monitoring <br />Frequency 1 <br />Continuous / <br />Instantaneous <br />Weekly <br />Weekly <br />Weekly <br />Weekly <br />Weekly <br />Permit No. COG - 850000 <br />Facility No. COG- 850062 <br />Page la <br />10 -Yr, 24 -Hr Receiving Stream <br />Capacity <br />Tuttle Draw — San <br />Miguel <br />Sample <br />Type <br />Weekly Grab <br />Grab <br />Grab <br />Grab <br />1— For a minor facility, as determined by the EPA NPDES Permit Rating Worksheet, all weekly monitoring requirements shall be changed to 2 days per month. <br />2— If power is not available, flow may be measured on an instantaneous basis. Major facilities shall monitor flow weekly, minor facilities 2 days / month <br />3 — If a visual sheen is noticed, a grab sample must be taken and analyzed for oil and grease <br />* Alternate Limitations may also apply. See Below. <br />ISSUED AND EFFECTIVE: MAY 10, 2011 EXPIRES: JUNE 30, 2013 <br />Recorder / <br />In -situ 2 <br />Grab <br />Visual 3 <br />