2010-12-15_PERMIT FILE - C1980005A (5)

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PART I Page No. 8 Permit No.: CO-0000221 E Outfall012 Effluent Parameter Effluent Limitations Maximum Concentrations 30-Day Average 7-Day Average Daily Maximum MGD Flow Report NA Report , pH, s.u. (minimum-maximum) NA NA 6.5-9 Oil and Grease, mg/I NA NA 10 Total Dissolved Solids, mg/I Report NA Report Total Recoverable Iron, ug/1 Report Until 5/31/11 Report 1 000 NA Report Beginning 6/1/11 Potentially Dissolved Manganese, ug/1 , Report NA Report Potentially Dissolved Selenium, ug/1 until 12/31/15 Report Report beginning 1/1/16 4.6 NA 18 Settleable Solids, ml/1 Report NA 0.5 ALTERNATE LIMITAT IONS Any discharge or increase in the volume o f a discharge caused by precipi tation within any 24-hour peri od less than or equal to the 10-year24-hour precipitation event (or snowmelt of equivalent volume) may comply with the following limitations subject to burden of proof requirements described in Part I.A.3. Effluent Parameter Effluent Limitations Maximum Concentrations 30-Day Average 7-Day Average Daily Maximum MGD Flow Report NA Report , pH, s.u. (minimum-maximum) NA NA 6.5-9 10 Oil and Grease, mg/I NA NA Total Dissolved Solids, mg/1 Report NA Report Total Recoverable Iron, ug/l Report Until 5/31/11 Report 000 1 NA Report Beginning 6/1/11 Potentially Dissolved Manganese, ug/1 , Report NA Report Potentially Dissolved Selenium, ug/1 until 12/31/15 Report Report beginning 1/1/16 4.6 NA 18 Settleable Solids, ml/1 Report NA 0.5 ALTERNATE LIMITAT IONS Any discharge or increase in volume of a discharge caused by precipitati on within any 24-hour period greater than the 10- year, 24-hour event (or series of storms or snowmelt of equivalent volume) may comply with the following limitations subject to burden of proof requirements described in Part I.A.3. Effluent Parameter Effluent Limitations Maximum Concentrations 30-Day Average 7-Dav Average Daily Maximum MGD Flow Report NA Report , pH, s.u. (minimum-maximum) NA NA 6.5-9 C •