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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale -Page 9 Permit No. CO-0045675 <br />V/. TERMS AND CONDlT/ONS OF PERMIT <br />A. Determination ojEjfluent Limitations (Cont.) <br />I. ElRuent Limitations: (Cont.) <br />Table V/-la - Effluent Limitations, Discharge Point OOIa <br />Parameter Limitations Rationale <br />Flow, MGD (gpm) 0.576 (400) a/ Design/Flow Assessmen! <br />Total Suspended Solids, mg/I 30 / 45 e/ State Effluent Regulations <br />Oil and Grease, rag/l 10.0 d/j/ State Effluent Regulations <br />pH, s.u. 6.5 - 9.0 c/ Water Quality Standards <br />Chronic WET Testing <br />Potentially Dissali•ed Aluminum, mg/l <br />Total Arsenic, mg/l <br />Potentially Dissolved Cadmium, mg/I <br />Potentially Dissolved Copper, mg/I <br />Dissolved Iron, mg/l <br />Total Recoverable Iron, mg/! <br />Potentially Dissolved Lead, mg/l <br />Dissolved Manganese, tag/l <br />Total Recoverable Manganese, mg/l <br />Total Radium 226+228, pCi/l <br />Total Selenium, mg/1 <br />Potentially Dissolved Silver, mg/l <br />Total Natural Uranium, mg/l <br />Potentially Dissolved7~nc, mg/l <br />Total Fluoride, mg/l <br />Total Sulfate, rag/[ <br />Repon Statistical Difference c/ Slale Discharge Permit Regulations <br />0.087 / !.8 b/ Antidegradation-Based /WQS-Based <br />Repon / 0.020 b/ Antidegradation-Based Limit <br />0.00040 / 0.0/5 b/ Antidegradation-Based /WQS-Based <br />0.0040 / 0.028 b/ Antidegradation-Based /WQS-Based <br />0.30 /Report b/ Antidegradation-Based Limit <br />1.0 /Report b/ Antidegradation-Based Litnit <br />0.00/2 / 0.11 b/ Antidegradation-Based /WQS-Based <br />0.050 /Repon b/ Antidegradation-Based Litnit <br />1.1 /Repon b/ Antidegradation-Based Umit <br />Repon / 5.0 b/ Antidegradation-Based Litnit <br />Report / 0.0040 b/ Antidegradation-Based Litnit <br />0.000030 / 0.0022 b/ Antidegradation-Based /WQS-Based <br />0.92 / 3.6 b/ Antidegradation-Based /WQS-Based <br />0.037 / 0. l9 b/ Antidegradation-Based /WQS-Based <br />Repon / 2.1 b/ Antidegradation-Based Limit <br />205 /Report b/ Antidegradation-Based Limit <br />a/ 30-Day Average c/ Minimum-Maximum e/ 34Day Average/7-Day Average <br />b/ 30.Day Average/Daily Mavimum d/Daily Maximum <br />f/ For every outfat! wilt oil and grease monimring, in dre event an oil sheen or floating oil is obsen~ed, a grab sample slmll be collected, <br />awtyzed, and reported on the appropriate Disdmrge Monironng Repon (DMRI. 1n addition, corrective nclion shall be taken immediately m <br />mitigate d+e discharge of oil oral grease. A descripnon of the corrective action taken should be included with the DMR. <br />