2008-12-04_PERMIT FILE - C1981033

Home Browse Search

PARTI Page No. 4 Permit No.: C 0-00443'7 4. Acute WET Testine - Outfall 001 a. Testin ag rid Reporting Requirements Tests shall be done at the frequency listed in Part I.B.I. Test results shall be reported along with the Discharge Monitoring Report (DMR) submitted for the reporting period during which the sample was taken. (i.e., WET testing results for the first calendar quarter ending March 31 shall be reported with the DMR due Aprll 28.) The results shall be submitted on the Acute Toxicity Test repport form, available from the Division. Copies of these reports are to be submitted to both the Division and EPA along with the DMR. The permittee shall conduct an acute 48-hour WET test using Da hnia ma na and an acute 96-hour WET test using Pimephales promelus (fathead minnow). Acute tests will be replacement staticstatic t single effluent grab sample. The permittei: shall conduct eat acute WET test in general accordance with methods described in Methods for Measurin the Acute Toxici of Effluents and Receivin Waters to Freshwater and Marine Or anisms, EPA/600/4-90/027 or t e most current edition, except as mods le y t e most current Division gut ante document entitled Guidelines for Conducting Whole Effluent Toxicity Tests. b. Failure of Test and Division Notification An acute WET test is failed whenever the LCsp, which represents an estimate of the effluent concentration which is lethal to SO% of the test organisms in the time period prescribed by the test, is found to be less than or equal to l00% effluent. The permittee must provide written notification of the failure of a WET test to the Division, along with a statement as to whether the Preliminary Toxicity Incident ('PTI")/Toxicity Identification Evaluation ("TIE") investigation or accelerated testing is being performed (see next section). ~iotification must be received by the Division within 14 calendar days of the demonstration of acute WET in the routine required test. "Demonstration" for the purposes of subparts b., c., d. and f. means no later than the last day of the laboratory test. c. Automatic Compliance Schedule Upon Failure of Test If a routine acute WET test is failed, the following automatic compliance schedule shall apply. As part of this the permittee shall either: i. proceed to conduct the PTUTIE investigation as described in subpart d., or ii. conduct accelerated testing using the single species found to be more sensitive. if accelerated testing is being performed, the permittee shall provide written notification of the results within 14 calendar days of corn letion of the "Pattern of Toxrci "/"No Toxici "demonstration. Testin will be at least once every two weeks for up to five tests until I) two consecutive tests fail or three o~five tests fail, in which case a pattern of toxicity has been demonstrated or, 2) two consecutive tests pass or three of five tests pass, in which case no pattern of toxicity has been found. If no pattern toxicityty is found the toxicity episode is considered to be ended and routine testing is to resume. If a pattern of toxicity is foun ' a PTl/TIE investigation is to be performed. If a pattern of toxicity is not demonstrated but a significant level of erratic toxicity is found, the Division may require an increased frequency of routine monitoring or some other modified approach. d. PTIII'IE status re ort is to be rovided to the Division at the 30 60 and 90 da oints of the PTI/TlE invesii anon. "l he Division may exten the time flame for investigation where reasonab a justification exists. A request or an extension must be made in writing and received prior. to the 120 day deadline. Such request must include a justification and supporting data for such an extension. The permittee may use the time for investigation to conduct a PTI or move directly into the TIE. A PTI consists of ii brief search for possible sources of WET, which might reveal causes of such toxicity and appropriate corrective actions more simply and cost effectively than a formal TIE. If the PTI allows resolution of the WET incident, the TIE need not necessarily be conducted. If, however, WET is not identified or resolved during the PTI, the TIE must be conducted within the allowed 120 day time frame. Anyy permittee that is required to conduct a PTI/T1E investigation shall do so in conformance with procedures identified in the following.documents, or as subsequently updated: I) Methods for A uatic Toxici Identification Evaluations Phase 1 Toxici Characterization Procedures, EPA/600/6-91/003 Feb. 91 an 2) Methods for Aquatic Toxicity Identification Evaluations, Phase [I Toxicity 1 entification Procedures, EPA/600/3-88/035 Feb. 1989. A third document in this serieg is Methods for A uatic Toxicit .Identification Evaluations Phase III Toxici Confttrnation Procedures, EPA/600/3-88/036'Feb. 1989. As iridicated by the tite, t is procedure is inten ed to'con irm at the suspected toxuant is truly the toxicant. This investigation is optional. Within 90 days of the determination of the toxicant oi- no later than 2l0 days after demonstration of toxicity, whiclie;ver is sooner, a control program is to be developped and received by the Division. The program shall set down a method and procedure for elimination o the toxicity to acceptable levels. . e. Request For Relief The permittee may request relief from further investigation and testing where the. toxicant has not been determined and the Division .has determined sortable treatment does not appear possible. In requesting such relief, the permittee-shall submit material sufficient to establish. the, following: , ~. i. It has complied with terms and conditions of. the. permit compliance schedule for the PTI/'i'fE investigation .and other . . appropriate conditions as may have been required by the Division; Revised 1 012 9/2 0 0 8