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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale -Page 10 Penrtit No. CO-0045675 <br />V!. TERAlS AND CONDIT/ONS OF PERMIT <br />A. Determination ojEjfluent Limitations (Cont.) <br />1. E,(jTuentLirnilations: (Cont.) <br />Table VI-I b - Ejfluent Limitations, Discharge Poinl 0016 <br />Parameter limitations Rationale <br /> <br />Flow, MGD (gprn) 0.36 (250) a/ Design/Flow Assessment <br />Total Suspended Solids, mg/l 30 / 45 e/ State Effluent Regulations <br />Oil and Grease, rng/! 10.0 d/j/ State EJjluent Regulations <br />pH, s. u. 6.5 - 9.0 c/ Water Quality Standards <br />Chronic WET Testing Repan Statistical Difference c/ Stare Discharge Permit Regulations <br />Potentially Dissolved Aluminum, mg/l 0.087 / 2.4 b/ Antidegradation-Based /WQS-Based <br />Tonal Arsenic, rng/l Report / 0.027 b/ Antidegradation-Based Limit <br />Potentially Dissolved Cadmium, rng/1 0.00053 / 0.020 b/ Antidegradation-Based /WQS-Based <br />Potentially Dissolved Copper, mg// 0.0053 / 0.038 b/ Antdegradation-Based /WQS-Based <br />Dissolved /non, rng/l 0.30 /Report b/ Antidegradation-Based Limit <br />Toml Recoverable /non, mg/l 1.0 /Report b/ Antidegradation-Based Lirnit <br />Potentially Dissolved Lead, mg/l 0.0015 / 0. /5 b/ Antidegradation-Based /WQS-Based <br />Dissolved Manganese, mg/l 0.050 /Report b/ Antidegradation-Baled Lirnit <br />Total Recoverable Manganese, mg/1 1.6 /Report b/ Antidegradation-Based Limit <br />Total Radium 226+228, pCi/[ Report / 5.0 b/ Antidegradation-Based Limit <br />Total Selenium, mg/1 Report / 0.0053 b/ Antidegradation-Based Limit <br />Potentially Dissolved Silver, mg/[ 0.000030 / 0.0029 b/ Antidegradation-Based /WQS-Based <br />Total Natural Uranium, mg/l 0.92 / 4.9 b/ Antidegradation-Based /WQS-Based <br />Potentially Dissolved Zinc, rng/l 0.051 / 0.26 b/ Antidegradation-Based /WQS-Based <br />Total Fluoride, mg/! Report / 2.7 b/ Antidegradation-Based Lirnit <br />Total Sulfate, mg/! 283 /Report b/ Antidegradation-Based Limit <br />n/ 30.Day Avernge c/ Mininwm-Maxinnrm e/ 30-Day Average/7-Day Average <br />b/ 34Dav Average/Daily Mazirntnn d/Daily Mazinuun <br />j/ For every outlall with oil and grease monimnng, in the event an oil sheen or floating oil is observed, a grab sample shall be collected, <br />analyzed, and reported on Ure appropriate Discharge Monitoring Report (DMR). In addition, corrective action slmll be taken immediately to <br />mitigate the discharge of oil oral grease. A description of the corrective action taken shadd be included with the DMR. <br />