2011-11-30_PERMIT FILE - C1981008 (5)

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PART T Page \o. 14 Permit No.: CO- 0000213 4, WET Testing 40. Aeute K'ET tatin -- f)u ails ; 0413 009 010 and 012 a t esting and Reporting Requirements rests shall be done at the frequency listed in Part LB. 1. Test results shall be reported along with the Discharge Monitoring Report (DMR) submitted for the end of the reporting period when the sample was taken. (i.e;., WET testing results for the calendar quarter ending March 31 shall be reported with the DMR due April 28, etc.) The results shall be submitted on the Acute Toxicity Test report farm, 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 each acute WET test in general accordance with methods described in Methods for Measuring the Acute Toxicity of Effluent,; and Receiving Waters to Freshwater and'Marine Organisms EPAt600l4- 90/02 r of its most current edition, excupt as modified by the most current Division guidance document entitled t iuidelines for Conducting Whole Effluent Toxicity T"ts. The permittee shall conduct an acute 48 -hour WFT test using Ccriodaphnia sp., and an acute. 95 -hour WFT test using fathead minnows, Acute tests will be replace rent static tests of a single effluent grab sample, b. failure of Test and Division Notification Beginning on the effective date of the limitations. an acute WET test is failed whenever the LC50, which represents an estimate of the effluent concentration which is lethal to 50% of the test organisms in the time period prescribed by the test, is found to be less than or equal to 100% effluent. The permittee must provide written notification of the failure of a WEI' test to the Division, along with a statement as to whether the Preliminary Toxicity incident (PTIPToxicity Identification Evaluation (Tfl;) investigation or accelerated testing; is being performed. Notification 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 Parts 1.A.3.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 or chronic WET test is failed, the following automatic compliance schedule shall apply. As part of ibis, the permittee shall either; i, proceed to conduct the PTT CIF.: investigation as described in Part I.A.44 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 completion of the Pattern of Toxicity/No Toxicity demonstration. Testing will be at least once every two weeks for up to five tests until: 1) two consecutive tests fail or three of 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 of toxicity is found the toxicity episode is considered to be ended and routine testing is to resume. If a pattern: oftoxiciry i% found, a PTI/TfE investigation is to be performed, if a pattern oftoxicity 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. PT1tTIE The results _of the PT1/T1E investigation are to be received by the Division within 120 days of the demonstration of chronic WET in the routine test, as defined above or if accelerated testing is performed, the date the pattern of toxicity is demonstrated. A status report is to be provided to the Division at the 30. 60 and 90 day noints of the PTIITIE investigation. The Division may extend the time fame for investigation where reasonable justification exists A request for 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.