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P;1RT I <br />Page No Sb <br />Permttilo CO-0000132 <br />• A. DEFINITION OF EFFLUENT LIIvIITA7iON5 <br />5. Whole Effluent Toxicity Testine Requirements (Chronic) - Outfall 015 (continued) <br />ii. During the period of the toxicity incident i[ has been in compliance with all other permit conditions. including, in <br />the case of a POTW, pre-treatment requirements; <br />iii. During the period of the toxicity incident ii has properly maintained and operated all facilities and systems of <br />treatment and control: and <br />iv. Despite the circumstances described in paragraphs (i) and (iii) above, the source and/or cause of ~oxici[y could not <br />be located or resolved. <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 permit[ee's resources, <br />provided that the underlying obligation to eliminate any continuing exceedance of the toxicity limit shall remain. <br />(f) Spontaneous Disaooearance <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 develop <br />and submit additional information which may include, but is not limited to, the results of additional testing. If no <br />pattern of toxicity is identified or recurring toxicity is not identified, the toxicity incident response is considered closed <br />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 the <br />following events occur: <br />i. Toziciry has been demonstrated in the effluent and the permit does no[ contain a toxicity limitation. <br />ii. The PTI/TIE results indicate that the tozican[(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 action. <br />iii. The PTI/TIE reveals other unique conditions or characteristics which, in [he opinion of the Division, justify the <br />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 />a.l `i'J ~ t 1 ) <br />See Part I.C. for Definitions. u y~QC rk;~ •• ~ ~ 1; <br />Amendment No. b Issued Effective 1 ['`~ ~ '- '-s~~10 <br />• <br />