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PART I <br />Page 11 <br />Permit No. COG-850000 <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />3. Monitoring Requirements <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 Outfall(s) <br />Effluent Parameter Measurement FrecuencX J Sample Tune J <br />Flow, MGD Weekly <br />pH, s.u. Weekly <br />Oil and Grease, mg/1 Weekly <br />Total Suspended Solids, mg/1 Monthly <br />Total Iron, mg/1 Monthly <br />Settleable Solids, ml/1 g/ Monthly <br />Total Dissolved Solids, mg/1 J* Quarterly <br />Total Phosphorus (as P), mg/1** Quarterly <br />b) Post-Mining Outfall(s) <br />Effluent Parameter Measurement FreauencX J <br />Flow, MGD Monthly <br />Settleable Solids, ml/1 g/ Monthly <br />Oil and Grease, mg/1 Monthly <br />pM, s.u. Monthly <br />Total Dissolved Solids, mg/1 J* Quarterly <br />Total Phosphorus (as P), mg/1** Quarterly <br />Instantaneous <br />or Continuous <br />Grab <br />Visual <br />Grab <br />Grab <br />Grab <br />Grab <br />Grab <br />Sample Tye <br />Instantaneous <br />or Continuous <br />Grab <br />Visual <br />Grab <br />Grab <br />Grab <br />* Total Dissolved Solids (TDS) monitoring is required only for discharges to <br />the Colorado River Basin. See specific facility certification rationale <br />to 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 />and all other tributaries to the Dillon Reservoir) and for discharges to <br />the Upper Bear Creek drainage area. See specific facility certification <br />rationale to determine whether phosphorus monitoring is required. <br />See Part I.B.4. for footnotes <br />