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COLORADO DEPARTMENT OF PUBLlC HEALTH AND ENV/RONMENT, Water Quality Control Division <br />Rationale -Page 6, Permit No. CO-0027154 <br />2. Other Penrrit Reouirements: The pernrittee has been in apparent compliance with all other terms and conditions <br />ojthe permit. <br />V. TERMS AND COND/T/ONS OF PERMIT <br />A. Determination of Effluent Limitations <br />Effluent Limi[ations: /n developing suitable effluent limitations, t/te Division must review all applicable standards <br />and regulations and apply [hose which are more stringent. This review includes, but is not limited to: Ure water <br />quality standard based effluent limitations, federal guidelines and standards (40 CFR Subchapter N) and State <br />Effluent Regulations (S CCR 1002-62). Such a review has been done for this facility. The following limitations <br />will apply. The basis for these limitations is discussed in Section V.A.2. <br />Tabte V-/ -- Effluent Limitations for Outfa[[s 001, 003, 005, 007, 020 <br /> <br /> <br />Parameter Discharge Limitations <br />Maximum Concentrations <br />30-Day Avg. Daily Max. <br /> <br />Rationale <br />Flow, MGD Report Report WQS Mass Bal Calculation <br />Total Suspended Solids, rag/2' 35 70 Federal Efjluerrt Guidelines <br />Settleable Solids, m('/!* It NA 0.5 Federal Effluem Guidelines <br />Oil and Grease, rng/P N/A 10 Stare Effluent Regulations <br />pH, s. u. (Minimum-Maximum) N/A 6.5-9.0 Water Quality Standards <br />Electrical Conductivity, umho/cm CO Salinity Regulations <br />Outfall001 6485 Report <br />Outfa!! 005 5340 Report <br />Outfall007 5150 Report <br />Outfalls 003, 020 Report Repot! <br />WET, Chronic Lethality No Statistics[ <br />Outjal[s 001, 005, 007, 020 N/A Difference State Permit Regulations <br />Cadmium (PD), mg/C <br />through December 3/, 2002 Report <br />0 <br />3 Report <br />0 <br />19 Interim Monitoring <br />W <br />li <br />S <br />d <br />d <br />beginning January 1, 2003 .00 .0 ater Qua <br />ar <br />ty <br />tan <br />s <br />Copper (PD), mg/C <br />through December 31, 2002 0.073 0.130 /nterirrr Limitations <br />beginning January /, 2003 0.039 0.065 Water Quality Standards <br />/ton (77t), mg/~ <br />tlrrou h Decerrrber 31, 2002 <br />a <br />Oraf <br />[ls 001, 005, 007, 020 L0 Report huerirn Limitation <br />Outfall 003 Report Report Interim Monitoring <br />begrmring January 1, 2003 <br />All Five Outfalls <br />/.0 <br />Report <br />Water Quality Standards <br />Manganese (PD), mg/L' <br />through December 31, 2002 <br />Report <br />Report <br />Interim Monitoring <br />li <br />S <br />d <br />d <br />beginning January 1, 2003 3.105 9.034 Water Qua <br />ty <br />tan <br />ar <br />s <br />Silver (PD), mg/P <br />[hrouglr December 31, 2002 Report Report Interim Monitoring <br />beginning January 1, 2003 0.0008 0.022 Water Quality Standards <br />* These purnmeters are primary limitations and nrav be exempted under certain conditions. See Pan /.A.4. of the permit, Burden <br />of Proof Requirements. <br />N This parameter does not apply to outfa[l 020. <br />Table V-2 -- Effluent Limitations for Outfall 009 <br />Maximum Concentrations <br />Parameter 30.Day Avg. Daily Max. Rationale <br />ow, eport eport ass a a cu anon <br />Settleable Solids, m(/f* NA 0.5 Federal Effluent Guidelines <br />Oil and Grease, mg/C' N/A 10 Slate Effluent Regulations <br />