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PART I <br />Page lg of 14 <br />Permit No. CO-0027154 <br />A. TERMS AND CONDITIONS <br />1. Effluent Limitations <br />d) Effluent Limitations For Outfalls 002 - 004. 006 and 008 (continued) <br />ALTERNATE LIMITATIONS <br />Effluent Parameter <br />Flow, MGD <br />Settleable Solids, ml/1 j/k/ <br />pH, standard Units (minimum-maximum) <br />Oil and Grease, mg/1 (No visible sheen) <br />Total Dissolved Solids, mg/1 <br />Discharge Limitation <br />Report <br />Report <br />6.5-9.0 <br />10 c/ <br />Report <br />e) Effluent Limitations For Outfalls 009. 010, 016 and 017 (surface runoff <br />discharges from post mining areas) <br />Effluent Parameter <br />Flow, MGD <br />Settleable Solids, ml/1 1/k/ <br />pH, standard units (minimum-maximum) <br />Oil and Grease, mg/1 (NO visible sheen) <br />Electrical Conductivity, umhojcm <br />Discharge Limitation <br />Report <br />0.5 c/ <br />6.5-9.0 <br />10 c/ <br />Report <br />Any discharge or increase in volume of a discharge caused by precipitation within any <br />24-hour period greater than the 10-year, 24-hour event (or series of storms or <br />snowmelt of equivalent volume) m~ comply with the following limitations subject to <br />burden of proof requirements described in Part I.A.2. <br />Effluent Parameter <br />Flow, MGD <br />Settleable Solids, ml/1 j/k/ <br />pH, standard Units (minimum-maximum) <br />Oil and Grease, mg/1 (NO visible sheen) <br />Electrical Conductivity, umho/cm <br />Discharge Limitation <br />Report <br />Report <br />6.5-9.0 <br />10 c/ <br />Report <br />f) Whole Effluent Toxicity - Chronic Lethality Limitation - Outfalls 001, 005, 007 <br />and 020 <br />Beginning April 1, 1996, and lasting through March 31, 1998, there shall be no <br />statistically significant difference in lethality (at the 95~ confidence level) <br />between the control and any effluent concentration less than or equal to 100$ <br />effluent. Such limitation shall apply as a daily maximum. <br />See Part I.D. for Footnotes <br />Corrected 03/15/93 <br />Amendment No. 2 Issued 07/18/94 Effective 09/01/94 <br />Amendment No. 4 Issued Effective <br />