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<br />B. MONITORING REQUIREMENTS <br />~:rl <br />Page lk of 14 <br />Permit No. CO-0027154 <br />1. Freauencv and Sample Tyoe For Outfalls 001. 005. 007 and 019 (continued) <br />Weekly total recoverable manganese concentrations shall be reported as the result of the <br />following calculation. The 30-day average concentration shall be determined using a normal <br />arithmetic mean of all weekly results per calendar month. <br />M019 - (0001)(M001) + (0005)(M005) + (0007)(M007) <br />Q019 <br />Where: M019 = Calculated flow weighted mean concentration far outfall 019; <br />0001 - Maximum daily flow during period for outfall 001; <br />M001 - Effluent concentration for outfall 001; <br />Q005 Maximum daily flow during period for outfall 005; <br />M005 - Effluent concentration for outfall 005; <br />0007 = Maximum daily flow during period Eor outfall 007; <br />M007 Effluent concentration for outfall 007; <br />Q019 = Combined maximum daily flow for outfalls 001, 005 and 007. <br />2. Freauencv and Sample Tvae For Outfalls 002. 003. 004. 006 008 009, 010, 016 and 017 <br />In order to obtain an indication of the probable compliance or non- compliance with the <br />effluent limitations specified in Part I.A.2., the permittee shall monitor all effluent <br />parameters ac the following frequencies, the results to be reported on the Discharge <br />Monitoring Report (See Parc I, Section B.3.): <br />a) Outfalls 002, 003, 004, 006 and 008 <br />Effluent Parameter Measurement Frequency ~ Sample Tvoe <br />Flow, MGD Weekly Instantaneous <br /> or Continuous <br />Total Suspended Solids, mg/1 Monthly Crab <br />Total Iron, mg/1 Monthly Grab <br />Oil and Grease, mg/1 Weekly Visual <br />pH, s.u. Weekly Crab <br />Settleable Solids, ml/1 i/ Monthly Grab <br />Electrical Conductivity, umho/cm Quarterly Grab <br />b) Outfalls 009, 010, 016 and 017 <br />Effluent Parameter Measurement Frequency ~ Sample Tvoe <br />Flow, MGD Weekly Instantaneous <br /> or Continuous <br />Oil and Grease, mg/1 Weekly Visual <br />pH, s.u. Weekly Grab <br />Settleable Solids, ml/1 j/ Monthly Grab <br />Electrical Conductivity, umho/cm Quarterly Grab <br />Sampling for compliance with the monitoring requirements specified above shall be <br />performed at the following locations: flow measuring devices at the authorized outfalls <br />(002, 003, 004, 006, 008, 009, 010, 016 and 017) from the various ponds to State waters. <br />See Part I.D. for Footnotes <br />