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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 12. Permit No. CO-0027154 <br />VI. TERMS AND CONDITIONS OF PERMIT <br />A. Effluent Limitations (continued) <br />Table VI-4 -- Effluent Limitations For Outfall 019* <br />Parameter Limitation Rationale <br />Flow, MGD Report ~ Combined Design Capacity <br />Total Recoverable~Manganese, mg/1 1.0 ~ Water Quality Standards <br />* Outfall 019 is an administratively established point that represents the combined <br />discharge of total recoverable manganese from outfalls 001, 005 and 007. <br />~ 30-Day Average <br />Table VI-5 -- Effluent Limitations For Outfalls 002 - 004, 006, 008 <br />Parameter Limitation Rationale <br />Flow, MGD <br />TSS, mg/1 <br />Total Iron, mg/1 <br />Settleable Solids, ml/1 <br />pH, s.u. <br />Oil and Grease, mg/1 <br />Electrical Conductivity, umho/cm <br />Report Design Capacity <br />35/70* ~ Federal BPT <br />3.5/7.0* a/ Federal BAT <br />0.5* J Federal BAT <br />6.5 - 9.0 J Water Quality Standards <br />10 ~ State Effluent Regulations <br />Report Salinity Regulations <br />* See discussion regarding alternate limitation burden of proof <br />a/ 30-Day Average/Daily Maximum <br />J Daily Maximum <br />J Minimum-Maximum <br />Table VI-6 -- Effluent Limitations For Outfalls 009, 010, 016, 017 <br />Parameter Limitation Rationale <br />Flow, MGD Report Design Capacity <br />Settleable Solids, ml/1 0.5* J Federal BAT <br />pH, s.u. 6.5 - 9.0 J Water Quality Standards <br />011 and Grease, mg/1 10 J State Effluent Regulations <br />Electrical Conductivity, umho/cm Report Salinity Regulations <br />* See discussion regarding alte rnate limitation burden of oroof <br />J 30-Day Average/Daily Maximum <br />J Daily Maximum <br />J Minimum-Maximum <br />