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PART I Page ld of 19 Permit No. CO-0032115 A. TERMS AND CONDTTIONS 1. Effluent Limitations (continued) (c) Gutfalls 001. 002. 005. 009. 011. 013. 015. 016 and 017 (continued) Any discharge or increase in wlume of a discharge caused by precipitation within any 24-hour period greater than the 10-Kean 24-hour event (or series of storms or snowmelt of equivalent volume) ~ cort~ly with the following limitations subject to burden of proof requirements described in Part I.A.2. Effluent Parameter Discharge Limitations 30-Day AvR Daily Max Flow, MGD Report Report Total Suspended Solids, mg/P Report Report Total Iron, mg/P Report Report Settleable Solids, mP/P N/A Report pH, s.u.(minimum-maximum) (009, 011, 013, 015, 016, 017) N/A 6.5-9.0 pH, s.u.(minirritun-niaximian) (001, 002, 005) .lime - September N/A 6.5-9.5 October - May N/A 6.5-9.0 Oil and Grease, mg/P N/A 10 Whole Effluent Toxicity, Acute N/A LC50 > 100% (d) Outfalls 003. 006, and 014 PRIMARY LII~fITATIONS Effluent Parameter Discharge Limitations 30-Dav Ave Daily Max Flow, MGD Report Report Settleable Solids, mP/P N/A 0.5 pH, s.u.(minimimi-maxirmmi) N/A 6.5-9.0 Oil and Grease, mg/P N/A 10 ALTERNATE LRII.TATIONS Any discharge or increase in volume of a discharge caused by precipitation within any 24-hour period greater than the 10-vear 24-hour event (or series of storn[s or snowmelt of equivalent volume) ~ cortply jai tl~ the following limitations subject to bw-den of proof requirements described in Part I.A.2. Effluent Parameter 1'7 ow, MGD Settleable Solids, mP/P pH, s.u. (minimum-maximum) Oil and Grease, mg/P Discharge Limitations 30-Dav Avg Report N/A N/A N/A Daily Max Repot[ P,eport 6.5-9.0 10 Amendment 2 Issued 03/15/94 Effective 05/01/94 Amendment 3 Issued 07/08/94 Effective 09/01/94 Amendment 4 Issued Effective See Part I.C. for Definitions.