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PART I Page 1~ of 14 Permit No. CO-0027154 B. MONITORING REQUIREMENTS 1. Frequency and Sample Type For Outfalls 001. 005. 007 and 019 a) Outfalls 001 and 007 Effluent Parameter Measurement Frequency Flow, MGD Weekly Total Suspended Solids, Three/Month Total Recoverable Iron, mg/1 Three/Month Total Recoverable Manganese, mg/1 Weekly Potentially Dissolved Copper, mg/1 n/ Three/Month Potentially Dissolved Silver, mg/1 ~ Monthly Electrical Conductivity, umho/cm Three/Month pH, s.u. Weekly Oil and Grease, mg/1 Weekly Whole Effluent Toxicity, Acute Quarterly (See Part I.B.4.a) - g)) Whole Effluent Toxicity, Chronic Semi-annual Through June 30, 1996 (See Part I.B 4.h)) b) Outfall 005 Effluent Parameter Measurement Frequency Flow, MGD Weekly Total Suspended Solids, Three/Month Total Recoverable Iron, mg/1 Three/Month Total Recoverable Manganese, mg/1 Weekly Potentially Dissolved Copper, mg/1 n/ Three/Month Potentially Dissolved Silver, mg/1 J Three/Month Electrical Conductivity, umho/cm Three/Month pH, s.u. Weekly Oil and Grease, mg/1 Weekly Whole Effluent Toxicity, Acute Quarterly (See Part I.B.4.a) Whole Effluent Toxicity, Chronic Semi-annual Through June 30, 1996 (See Part I.B 4.h)) Sample Tye Instantaneous or Continuous Grab Grab Grab Grab Grab Grab Grab Visual Grab Composite Sample Tvoe Instantaneous or Continuous Grab Grab Grab Grab Grab Grab Grab Visual J Grab - S)) Composite Self-monitoring samples taken in compliance with the monitoring requirements specified above shall be taken at the following locations: outfalls 001, 005, and 007: in the culverts prior to the effluent flow measuring devices. c) Outfall 019 Effluent Parameter Measurement Frecuencv J Sample Tyke e/ Flow, MGD Monthly Total Recoverable Manganese, mg/1 Monthly Calculated Calculated The combined total flow from outfalls 001, 005 and 007 shall be calculated and reported as the flow from outfall 019. Amended Effective