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P;\ RT I <br />Put~e 9 <br />Permit No. CO-t)OUO?21 <br />• A. "f CK~\15 ."\NU CONDIIIOuS <br />4. bVhnle EClluent Toxicity Testine Reuuirements Glcutel - Outfalls Iltl?. 003 011 OOfi 010 011 ill' 013 Old Olfi <br />nn <br />Testim~ and Reportine Requirements <br />Tests shall be done at the frequency listed m Part LB.I. Test resuhs shall be reported along with the Discharge <br />Monitoring Report (DMR) submitted (or the reposing period dunng •.vhich the sample was taken. (i.e., WET tesun~ <br />results for the firs[ calendar quarter ending Ntarch 31 shall be reported with the DtvIR due April 28.) The results <br />shall be submuted on thz Acute Toxicity Test repos form, available from the Division. Copses of these reports are to <br />be submitted to the Division along with the DMR. <br />The permittee shall conduct acute WET tests as follows: For outfalls 002, 003, 006, 010 and OI l - a 48-hour WET <br />test using Ceriodaphnia sp.; for out(all 005 - a 48-hour WET test using Daphnia magna; and (or outfalls Ol?, 0I3, <br />O14, 0I6 and 017 - a 48-hour WET test using Ceriodaphnia sp. and an acute 96-hour WET test using fathead <br />minnows. Acute tests will be replacement static tests of a single effluent grab sample. The permittee shall conduct <br />each acute WET test in general accordance with methods described in Methods (or Measuring the Acute Toxicm~ of <br />Effluents and Receiving_Waters to Freshwater and Marine Organisms, EPA/600/4-90/027 or the most current edition, <br />except as modified by the most current Division guidance document entitled Guidelines for Conducting Whole <br />EfFluent Toxicity Tests. <br />b. Failure of Test and Division Notification <br />An acute WET test is failed whenever the LCso, which represents an estimate of the effluent concentration which is <br />lethal to 50% of the test organisms N the time period prescribed by the test, is found to be less than or equal to 100 0 <br />effluent. The permittee must provide wrinen notification of the failure of a WET test to the Division, along with a <br />• statement as to whether [he Preliminary Tonicity Incident ("PIT)/Toxicity Identification Evaluation ("TIE") <br />investigation or accelerated testing is being performed (see nett section). NotiCicalion must be received by the <br />Division within 14 calendar days of the demonstration of acute WET in the routine required test. <br />"Demonstration" for the purposes of Patts I.A.4.b., c., d. and f. means no later than the last day o(the laboratory <br />test. <br />c. Automatic Compliance Schedule Upon Failure of Test <br />1(a routine acute WET test is failed, the following automatic compliance schedule shall apply. As pan of this the <br />permittee shall either. <br />I. proceed to conduct the PTI/TIE investigation as described N Pan I.A.4 d., or <br />ti. conduct accelerated testing using the single species Found to be more sensitive. <br />If accelerated testing is being performed, the permittee shall provide written notification of the results within <br />14 calendar days of completion of the "Pattern of Toxicity"/"No Toxicity" demonstration. Testing will be at least <br />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 <br />pattern of toxicity has been demonstrated or, 2) two consecutive tests pass or three of Five tests pass, in which case no <br />pattern of toxicity has been found. If no pattern of toxicity is found the toxicity episode is considered to be ended and <br />routine testing is to resume. If a pattern of toxicity is Found, aPTI/TIE investigation is to be performed. I(a pattem <br />of toxicity is not demonstrated but a significant level of erratic toxicity is found, the Division may require an <br />increased frequency of routine momtoring or some other modified approach. <br />d PTIITIE <br />The results nF the PTIITIE investigation are to he received by the Division within I~0 days of the <br />demonstration of acute 1V ET in the routine test, as defined above or iF accelerated testing is oerfnrmed the <br />• date the pattern of toxicity is demonstrated A status repnri is to he provided to the Division at the 30 fi0 and <br />90 day__points of the F''i'1/TIE investigation. The Division may extend the time frame (or investigation where <br />reasonabVe jusnltcatlon exists. A request for an extension must be made in wrung and received poor to the 130 day <br />deadline Such request must include a justihcauon and supposing data for such an extension <br />Corrected _ - 7/?5/a7 <br />.4 mcndmem plo. I issued lg t; `1 ~ i~in E(leai~~e .r ~~i t 17~`J <br />~- ~v J4- <br />