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V_.d~~7 y <br />~,y. ,,, <br />B. MONITORING REQUIREMENTS <br />3. Chronic WET Testing-Outfalls 003, 022 and 024 (continued) <br />(e) PTIlI'IE <br />The results of the PTI/TIE investigation are to be received br the Division within 120 days of the demonstration <br />of chronic W ET in [he routine test, as defined above, or if accelerated testing is performed, the date the pattern of <br />toxicity is demonstrated. A status report is to be provided [o the Division at the 30, 60 and 90 day points of the <br />PTI/TIE investigation. The Division may extend the time framz for investigation where reasonable justification exists. <br />A request for an extension must be made in writing and received prior to the 120 day deadline. Such request must <br />include ajustification and supporting data for such an extension. <br />The pernittee may use the time for investigation to conduct a PTI or move directly inu> the TIE. A PTI consists of a <br />brief search for possible sources of WET, .vhich might reveal causes of such toxicity and appropriate corrective actions <br />more simply and cost effectively than a formal TIE. If the PTI allows resolution of the WET incident, the TIE need not <br />necessarily be conducted. If, however, WET is not identified or resolved during the PTI, the TIE must be conducted <br />within the allowed 120 day time frame. <br />Any permittee [hat is required to conduct a PTI/TIE investigation shall do so in conformance with procedures identified <br />in the following documents, or as subsequently updated: I) Toxicity ldentification Evaluation: Characterization of <br />Chronically Toxic EfFluenls, Phase I, EPA/600/6-91/OOSF May 92, 2) Methods for Aquatic Toxicity Identification <br />Evaluations, Phase I Toxicity Characterization Procedures, EPA/600/6-91/003 Feb. 91 and 3) Methods for Aquatic <br />Toxicity Identification Evaluations, Phase II Toxicity Identification Procedures, EPA/600/3-88/035 Feb. 1989. <br />A fourth document in this series is Methods for Aquatic Toxicity Identification Evaluations, Phase III Toxicity <br />Confirmation Procedures, EPA/600/3-88/036 Feb. 1989. As indicated by the title, this procedure is intended to confirm <br />that the suspected toxicant is truly the toxicant. This investigation is optional. <br />Within 90 days of the detetminalion of the toxicant or no later than 210 days after demonstration of toxicity, whichever is <br />sooner, a control program is to be developed and received by the Division. The program shall set down a method and <br />procedure for elimination of the toxicity to acceptable levels. <br />(~ Request For Relief <br />The permipee ntay request relief from further investigation and testing where the toxicant has not been deternined and <br />the Division has determined suitable treatment does not appear possible. In requesting such relief, the perntittee shall <br />submit material sufficient to estabhsh the following: <br />(i) It has complied with terns and conditions of the pemtit compliance schedule for thie PTI/TIE investigation and other <br />appropriate conditions as may have been required by the Division; <br />(ii) During [he period of the toxicity incident i[ has been incompliance with all other Fernit conditions, including, in the <br />case of a POTW, pre-treatment requirements; <br />(iii) During the period of the toxicity incident it has properly maintained and operated all facilities and systems of <br />treatment and control; and <br />(ivlDespite the circumstances described in paragraphs (i) and (iii) above, the source and/or cause oftoxicity could not be <br />located or resolved. <br />rrrs~a ~... <„ <br />