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PART I <br />Page xi <br />Permit No. CO-0032638 <br />B. MO)`TITORING REQUIItEMEN'fS <br />3. Acute WET Testing - Outfalls 004 and 007 (continued) <br />If deemed appropriate by the Division, the permit or the compliance schedule may be modified to revise the ongoing <br />monitoring and toxicity investigation requirements to avoid an unproductive expenditure of the permittee's resources, <br />provided that the underlying obligation to eliminate any continuing exceedance of the toxicity limit shall remain. <br />f. ~ontaneous Disappearance <br />)(toxicity spontaneously disappears at any time afrer a test failure, the permittee shall notify the Division in writing <br />within 14 days of a demonstration of disappeazance 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 tonicity is identified or recurring toxicity is not identified, the tonicity incident response is <br />considered closed and normal WET testing shall resume. <br />g. Toxicity Reocener <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 [o the control of toxicants if one or more of <br />the following events occur: <br />(i) Tonicity has been demonstrated in the effluent and the permit does no[ contain a tonicity 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 that the 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 />See Part I.C. for Definitions. Amendment No. 1 Issued Effective <br />