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PART ]! Page No. 7 Permit No. C0~-0032115 A. DEFINITION OF EFFLUENT LIhh1I"SATIONS 2. Acute WET Testinc - Outfalls 001. 002.005. 009. 011. 013. 015. 016. 017. 019. 020. 021. and Q23 ~~antinued The results shall be submitted on the Acute Toxicity Test report form, available from the Division. t:opies of these reports are to be submitted to both the Division end EPA along with the DMR. The perminae shell condta;t m acute 48-hour WET test using Ceriodaphnie sp., and an acute !]ti-hotu WET test using fathead minnowss. Acute testa will ba replacement static teats of a single affluent grab sample. The permiaee shall conduct each acute WET test is general accordance with methods descnbed in Methods for Meesurine the Acute Toxicirv of Effluents and Receivine Waters to Freshwater and Marine Oreanisms, EPA/G00/4-90/027 or the most current edition, except as modified by rho most current Division guidance document entitled Guidelines for Corsductute Whole Effluerrt Toxicity Teats. (b) Fmlttre of Test and Division Notification Aa acorn WET test is fiilad wherovar the LCp, which represents an estimate of the effluent conceotrafion which is lethal to 50% of the test organisms in the time period prescn'bad by the test, is found to be less than or equal to 100 °.b effluent. The permittae must provide written notification of the failure of a WET test to the Division, along with a statemem as to whether the Preliminary Toxicity Incident ('PT[')lfoxicity Identification Evaluation ('TIE") investigation or accelerated testirrg is being performed (see next section). Notification must be received by the Division within 14 calendar days of the demonstration of ttctQe WET in the routine required test. 'Demonstration' for tbe purpose:: of Parts I.A,2.(b),(c),(d) end (f) trams no later than the fast day of the laboratory test. (c) Automatic Compliance Schedule Upon Failure of Test If a rattiae acute WET test is failed, the following automatic compliance schedule shall apply. As pert of this the perooittee shall either: (i) proceed to conduct the PTI/TfE investigation as descnbed in Part I.A.2.(d), or (it) conduct accelerated testing using the single species found to be mom sensitive. If accelerated testittg is being performed, the permittee shall provide written notification of tite results within 14 calendar days of completion of the "Pattern of Toxicity"1"No Toxicity" demonstration. Testigg will be at least once every two weeks for up to five tests until 1) two consecutive tests fail or thrx of five tests fail, in which case a pettem of toxicity has bean demonstrated or, 2) two coasecutiva tests pass or three of five tests psss, in which case m pettem of toxicity has bcea found. Tf m pettem of toxicity u formd the toxicity episode is considered to be eroded and routine testing is to resume. If a pettem of toxicity is fo[md, a PTUTIE investigation is to be performed. If a pen.em of toxicity is not demonstrated but a significant love] of erratic toxicity is fotmd, the Division may require m increa:~ed frequency of routine monitoring or some other modified approach. (d) PTI/I'~ The parmittee may use the time for mvosligatioa to conduct a PTI or trove directly into the TIE. A PTI consists of a brief search for possible sources of WET, which might reveal Ca„Qes of such toxicity end appropriate ariractive actions more simply and cost effxtively thm 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 condrcted within the allowed 120 day timo frame. • Except outfall 002 -see Part I.B.1.6). Ammdmeat No. 1 Issued MAY 30 1997 Effective JLTL 1 1997 Amendment No. 3 Issued OCT 26 1998 Effective DEC 1 1998 Ameodmem No. 4 Issued Effective A request for m extension moat be made is writing and received prior to the 120 day deadline. Such request anus include a justification and supporting data for such m extension.