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<br />B <br />EFFLUENT LIMITATIONS AND MONITORING REQU IItF.t~NTS <br />2, Monitoring Requirements <br />PART I <br />Page 7 <br />Permit No. COG-850000 <br />In order to obtain an indication of the probable compliance or <br />noncompliance with the effluent limitations specified in Part I.B,1, <br />the permittee shall monitor all effluent parameters at the following <br />frequencies. <br />(a) Active Mining <br />Effluent Parameter Measurement Frequency d/ Sample Tqpe e/ <br />Flow, MGD <br />Total Suspended Solids, mg/1 <br />Total Iron, mg/1 <br />Settleable Solids, ml/1 h/ <br />011 and Grease, mg/1 <br />pH, s.u. <br />Total Dissolved Solids, mg/1 ~/* <br />Total Phosphorus (as P), mg/1** <br />Weekly <br />Monthly <br />Monthly <br />Monthly <br />Weekly <br />Weekly <br />Quarterly <br />quarterly <br />Instantaneous <br />or Continuous <br />Grab <br />Grab <br />Grab <br />Visual f/ <br />Grab <br />Crab <br />Grab <br />(b) Poat-Mining <br />Effluent Parameter <br />Measurement Frequency d/ <br />Sample Type e/ <br />Flow, MGD <br />,,. Monthly <br />Settleable Solids, ml/1 h/ Monthly <br />Oil and Grease, mg/1 Monthly <br />pH, s.u. ~~ Monthly <br />Total Dissolved Solids, mg/1 ~/* Quarterly <br />Total Phosphorus (as P), mg/1** Quarterly <br />Instantaneous <br />or Continuous <br />Grab <br />Visual f/ <br />Grab <br />Grab <br />Grab <br />* Total Dissolved Solids monitoring is required only for discharges to the <br />Colorado River Basin. See specific facility certification rationale to <br />determine whether TDS monitoring is required. <br />** Total phosphorus monitoring is required only for discharges to the Dillon <br />Reservoir drainage area (i.e., Ten Mile Creek, Snake River, Blue River, <br />all tributaries to the Dillon Reservoir). See specific facility <br />certification rationale to determine whether phosphorus monitoring is <br />required. <br />See Part I.B.3. for footnotes <br />