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PART I Page lj of 14 Permit No. CO-0027154 B, MONITORING REQUIREMENTS 1. Freouencv and Samole Type For Outfalls 001. 005. 007 and 019 a) Outfalls 001 and 007 Effluent Parameter Measurement Freouencv d/ Sample Tyke e/ Flow, MGD Weekly Instantaneous or Continuous Total Suspended Solids, Three/Month Crab Total Recoverable Iron, mg/1 Three/Month Grab Total Recoverable Manganese, mg/1 Weekly Crab Potentially Dissolved Copper, mg/1 n/ Three/Month Grab Potentially Dissolved Silver, mg/1 ~ Monthly Crab Electrical Conductivity, umho/cm Three/Month Grab pH, s.u. Weekly Grab Oil and Grease, mg/1 Weekly Visual J Whole Effluent Toxicity, Chronic Quarterly 3 CompositesjTest b) Outfall 005 Effluent Parameter Measurement Frequency J Samnle Tune J Flow, MGD Weekly Instantaneous or Continuous Total Suspended Solids, Three/Month Grab Total Recoverable Iron, mg/1 Three/Month Crab Total Recoverable Manganese, mg/1 Weekly Grab Potentially Dissolved Copper, mg/1 ~ Three/Month Grab Potentially Dissolved Silver, mg/1 ~ Three/Month Crab Electrical Conductivity, umho/cm Three/Month Grab pH, s.u. Weekly Grab Oil and Grease, mg/1 Weekly Visual Whole Effluent Toxicity, Chronic Quarterly 3 Composites/Test Self-monitoring samples taken in compliance with the monitoring requirements specified above shall be taken at the following locations: outfalls 001 and 007 - in the culverts prior to the effluent flow measuring devices, 005 - at the effluent flow measuring device. c) Outfall 019 Effluent Parameter Measurement Frequency J Samnle Twe e/ Flow, MGD Monthly Calculated Total Recoverable Manganese, mg/1 Monthly Calculated The combined total flow from outfalls 001, 005 and 007 shall be calculated and reported as the flow from outfall 019. Amendment No. 1 Issued 11/03/93 Effective 01/01/94 Amendment No. 2 Issued Effective