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PART I <br />Page No. 7 <br />Permit No. CO-0036684 <br />A. DEFINTIION OF EFFLUENT LIlIIITATIONS <br />5. Chronic WET Testine - Outfall 001 (continued) <br />t. Spontaneous Disappearance <br />If toxicity spontaneously disappears at any time after a test failure, the permittee shall notify the Division in writing <br />within 14 days of a demonstration of disappearance of the toxicity. The Division may require the permittee to <br />develop and submit additional information which may include, but is not limited to, the results of additional testing. <br />If no pattern of toxicity is identified or recurring toxicity is not identified, the toxicity incident response is <br />considered closed and normal WET testing shall resume. <br />g. Toxicity Reopener <br />This permit may be reopened and modified (following proper administrative procedures) to include new compliance <br />dates, additional or modified numerical permit limitations, a new or different compliance schedule, a change in the <br />whole effluent toxicity testing protocol, or any other conditions related to the control of toxicants if one or more of <br />the following events occur: <br />(i) Toxicity has been demonstrated in the effluent and the permit does no[ contain a toxicity limitation. <br />(ii) The PTI/TIE results indicate that the toxicant (s) represent pollutant(s) that may be controlled with specific <br />numerical limits, and the Division agrees [ha[ [he numerical controls are the most appropriate course of <br />action. <br />(iii) The PTI/TIE reveals other unique conditions or characteristics which, in the opinion of the Division, justify <br />the incorporation of unanticipated special conditions in the permit. <br />(iv) The Division may reopen this permit and impose chronic toxicity limits where chronic toxicity is identified. <br />B. ]ttONTfORING REQUII2EAIENTS <br />1. Frequencv and Sample Tvpe <br />In order to obtain an indication of the probable compliance or noncompliance with the effluent limitations specified in <br />Pan f.A.l, the permittee shall monitor all effluent parameters at the following frequencies. Such monitoring will begin <br />immediately and last (or the life of the permit unless otherwise noted. The results of such monitoring shall be reported <br />on the Discharge Monitoring Report form (See Pan I.E.). <br />a. Outfall 001 <br />Effluent Parameter Measurement Frequencv Sample Tvpe <br />Flow, MGD Weekly Instantaneous <br /> or Continuous <br />Total Suspended Solids, mg/P Monthly Grab <br />Total Recoverable Iron, mg/P Monthly Grab <br />Settleable Solids, mP/P Monthly Grab <br />Oil and Grease, mg/P Weekly Visual <br />pH, s.u. R'eekly In-situ <br />Conductivity, µmho/cm Quarterly Grab <br />Whole Effluent Toxicity, Chronic Quarterly _ <br />3 Composites/Test <br />~ee Part I.C. for Definitions. <br />:.ov e.....,,.., ,.. iw <br />