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COLORADO DEPARTMENT OFPUBLlC NEALTNAND ENV/RONMENT. Water Quality Control Division <br />Rationnle -Page 4, Permit No. CO-0027!46 <br />VI. TERMS AND CONDITIONS OF PERMIT <br />A. Determinntion ofEffiuent Limitations <br />1. Efliuent Limitahons.• The effluent limitations contained in Tables VI-I through V/-3 will apply and are discussed in <br />Section VLA.2. <br />Table VI-1-Effluent Limits for Out(alls 00I. 002, 016 <br />Flow, MGD Report/Report a Design Capacity <br />TSS, mg/1 35/70 b Federal Effluent Guidelines <br />pH, s. u. 6.5-9.0 d Water Quality Standards <br />Oil and Grease, mg/1 10 c State Effluent Regulations <br />TDS,mg/l Report/Reportb Salinity Regulations <br />WET, Acute LCSO> 100% a State Permit Regulations <br />Iron, Total, ug/1 3500/7000 b Federal Effluent Guidelines <br />-Effluent Limits (or Out(alls 005, 007, 008, 009; 010, 011, 014 <br />Flow, MGD Report/Report a Design Capacity <br />TSS, mg/1 a 35/70 b Federal Effluent Guidelines <br />pH, s.u. 6.5-9.0 d Water Quality Standards <br />Oil and Grease, mg/1 10 c Stare Effluent Regulations <br />TDS, mg/l Report/Report b Salinity Regulations <br />Iron, Total, ug/! a 3500/7000 b Federal Effluent Guidelines <br />Settleable Solids, ml/1f 0.5 c Federal Effluent Guidelines <br /> Table V!-3 -Effluent Limits for Outfalls 012. 013 <br />Flaw, MGD Report/Report a Design Capacity <br />pH, s. u. 6.5-9.0 d Water Quality Standards <br />Oil and Grease, mg/l 70 c State Effluent Regulations <br />TDS, mgR Report/Report b Salinity Regulations <br />Settleable Solids, mLl a 0.5 c Federal Effluent Guidelines <br />Federal ELG means federal effluent limitntianguldelines found in 40 CFR 434.42, 40 CFR 434.43, and 40 CFR 434.63. <br />' 30-day average /doily maximum <br />° 30day average/daity maximum <br />` DailyMazimum <br />~ Minimum-Maximum <br />` Tkis limitation may be exempted due to precipitation-related duaharges. See Alternate Limitation Burden of Proof Requirements in permit <br />t Thislimitation may app[yfor discharges caused bypredpitation. See Alternnte Limitation Burclen afProofRequiremertts in permit. <br />2. Discussion ofEflluentLimitations <br />a. Oil and Grease: The Regu[atons for Efluent Limitations (Regulation No. 61) include ef}luent [imitations that apply <br />to all discharges of wastewater to State waters. These regulations are applicable to the discharges from the <br />Roadside Mine (North and South Portals) WWTF. <br />b. ~N: This parameter is limited by Water Quality Standards as the water quality standards of 6.5-9.0 s. u. range are <br />more stringent than those specified under the Regulations (or Effluent Limitations. <br />c. Applicable Federal Effluent Guidelines and Standards: The federal guidelines that apply to this type offaciliry are <br />found under 40 CFR Part 434, rifled Coal Mining Point Source Category. The limitations that apply are: <br />Last Revised: !//3/2003 <br />