Laserfiche WebLink
PART <br />Page 10 <br />Permit Nu CO-OOU0221 <br />• +~. 'rF.R~~ts .aND cOrvDlTlous <br />J. Whole Effluent Toxicity Testine Requirements (Acute) - Qwfalls 1102. 003 005, 006. OU), ill 1, UI?. D13 01~! Ulfi <br />and 017 (continued) <br />The permittee may use the lime for investigation to conduct a PTI or move directly into the TfE. A PTI consists of a <br />brie) search (or possible sources of WET, which might reveal caucus of such to.xiary and appropnate corrective <br />actions more simply and cost effectively than a formal TIE. If the PTI allows resolution of thz WET incident, the <br />TIE need not necessarily be conducted. If, however. WET is not identified or resolved during the PTI, the TIE must <br />be conducted within the allowed 120 day time lrame. <br />Any permittee that is requred to conduct aPTI/TIE investigmion shall do so in conformance with procedures <br />identified in the following documents, or as subsequently updates. 1) tvlethods for Aquatic Toxicirv Identification <br />Evaluations. Phase 1 Toxicirv Characteri2ation Procedures, EPA/600/6-91/003 Feb. 91 and 2) Methods for Aquatic <br />Toxicirv Identification Evaluations Phase II Toxicity Identification Procedures, EPA/600/3-88/035 Feb. 1989. <br />A third document in this series is ~1ethods for Aquatic Toxicity Identification Evaluations Phase 111 Toxicity <br />Confirmation Procedures, EPA/600/3-88/036 Feb. 1989. As indtca[ed by the title, this procedure is intended to <br />confirm that the suspected toxicant is truly the toxicant. This investigation is optional. <br />Within 90 days of the determination of the toxicant or no later than 210 days after demonstration oftoxicity, <br />whichever is sooner, a control program is to be developed and received by the Division. The program shall set down <br />a method and procedure far elimina[ion of the [oxiciry to acceptable levels. <br />e. Request For Relief <br />• The permittee may request relief from further investigation and testing where the [oxicant has not peen determined <br />and the Division has determined suitable treatment does not appear possible. In requesting such relief, the permittee <br />shall submit material sufficient to establish the following: <br />I. It has complied with terms and conditions of the permit compliance schedule for the PTI/TIE investigation and <br />other appropriate conditions as may have been required by the Division; <br />ii. During the period of the toxicity incident it has been in compliance with all ocher permit conditions, including, 'm <br />the case of a POTW, pretreatment requirements; <br />iii. During the period of the tonicity incident it has properly maintained and operated all facilities and sys[ems of <br />treatment and control; and <br />iv. Despite the circumstances described in paragraphs (I) and (iii) above, the source and/or cause of [oxiciry 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 [oxiciry inevestigation requirements to avoid an unproductive expenditure o(the permit[ee's resources, <br />provided that the underly'mg obligation to eliminate any continuing exceedance of the toxicity limit shall remain. <br />Spontaneous Disappearance <br />If [oxiciry spontaneously disappears at any time after a test failure, the permittee shall notify the Division in writing <br />within 14 days of a demonsirauen of disappearance of the toxicity. The Division may require the permittee to <br />develop and submit additional information which may include, bw is not limited to. the results of additional testing. <br />If no pattern of toxicity is identified or recurring toziciry is no[ identified, the toxicity incident response is considered <br />closed and normal WET testing shall resume. <br />~t Correc[ed 7f?5197 <br />• Amendmem No I Issued~UL / 9 ~QQ Effective ~GQ ~ ~jaQ(~ <br />o~ ~~r- ~ <br />