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PARTI Page No. 8 Permit No.: CO-0032115 of toxicity is identified or recurring toxicity is not identified, the toxicity incident response is considered closed and normal WET testing shall resume. g. Toxicity Reooener This permit maybe reopened and modified (following proper administrative procedures) to include new compliance dates, additional or modified numerical permit limitations, a new or different compliance schedule, a change in the whole effluent toxicity testing protocol, or any other conditions related to the control of toxicants if one or more of the following events occur: i. Toxicity has been demonstrated in the effluent and the permit does not contain a toxicity limitation. ii. The PTI/TIE results indicate that the toxicant(s) represent pollutant(s) that maybe controlled with specific numerical limits, and the Division agrees that the numerical controls are the most appropriate course of action. iii. The PTI/TIE reveals other unique conditions or characteristics which, in the opinion of the Division, justify the incorporation of unanticipated special conditions in the permit. B. MONITORING REQUII2EMENTS 1. Frequency and Sample Tvoe In order to obtain an indication of the probable compliance or noncompliance with the effiuent limitations specified in Part I.A.1, the pemrittee shall monitor all effiuent parameters at the following frequencies. Such monitoring will begin immediately and last for the life of the permit unless otherwise noted. The results of such monitoring shall be reported on the Discharge Monitoring Report form (See Part I.E.) a. Outfalls 011, 017, 019, 020, 021, 023 Parameter Frequency Sample Type Flow, MGD Once per week Instantaneous or Continuous Total Suspended Solids (TSS), mg/1 Once per month Grab pH, s.u. (minimum-maximum) Once per week In-Situ Oil and Grease, mg/1 Once per week Visual Total Dissolved Solids, mg/1 Once per quarter Grab Whole Toxicity, Acute Toxicity Once per quarter Grab Settleable Solids (mUl) Once per month Grab Iron, Total, ug/1 Once per month Grab WET testing is required only when Mine Water is being discharged at ooe or more of the above outfalls. If onty surface runoff is discharged, WET testing is not required b. Outfalls 001, 002.005, 008, 009, 014, 018.022, 024 Parameter Flow, MGD Total Suspended Solids (TSS), mg/1 pH, s.u. (minimum-maximum) Oil and Grease, mg/1 Total Dissolved Solids, mg/1 Settleable Solids, ml/1 Total Iron, ug/1 Frequency Sample Tvpe Once per week Instantaneous or Continuous Once per month Grab Once per week In-situ Once per month Visual Once per quarter Grab Once per month Grab Once per month Grab See Part I.C. for Definitions.