2001-12-11_PERMIT FILE - C1980007A (4)

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PART I Page 12 Pettnit No. CO-0038776 ~IONTTORING REQUIREMENTS 3. Acute WET Testine - Outfalls 002. 004. Ol l and 013 Icontinuedl (i) Toxicity has been demoastrared in the efflurnt and the permit don not wntaia a toxicity limitation. (ii) The PTVflE vaults indicate that the toxicant (s) represem pollutant(s) thaz may be controlled with specific numerical limits, and the Division agrees that the aumaical controls ate the most appropriaze course of action. (iii) The P'flrl'IE reveals other unique conditions or rharacuristics which, in the opinion of the Division, justify the incorporazion of unanticipazed special conditions is the permit. 4. Chronic WET Testine - Ontfall 012 (a) Tatine and Reoortin¢ Reouircments Tests shall be done at the freauencv listed in Part I.B.1. Tat faults shad be repotted on the Discharge Monitoring Report (DMR) submitted for the reporting period during which the sample was taken. (i.e., WET taring vaults for the first calendar quarter ending Match 31 shall be teponed with the DMR due April 28.) The results shall be submitted on the Chronic Toxicity Test report form, available from the Division. Copies of shoe reports are to be submitted co both the Division and EPA along with the DMR. The petmittee shall conduct each chronic WET tat is general aaordance with methods dactibed Short Term Methods for Estimative the Chronic Toxicirv of Effluents and Receivine blazers m Freshwater Oreanisttu, EPAl600l4-89/OOI or the most t:urtrnt edition, except as modified by the most rnrrrnt Division guidance document entitled S3uidelina for Conductive Whole Effluent Toxicirv Tars. The permitter shall conduct such tau using Ceriodaphnia dubia and fathead minnows. (b) Failure of Test and Division Notification Beginning on the effective daze of this permit, a chronic WET tat is failed whenever there is a statistically significant difference in lethality between the control and any effluent wnaatration less than or equal to the instream waste eonerntrazion ('IWC"). The IWC for this permit has been determined to be 10090. The permittee must provide writtrn notification of the failure of a WET tat to the Division, along with a stazement as [o whether a Preliminary Toxicity [nvatigatiaa ('PTI')lCoxiciry Idrntifira[ion Evaluation ("TIE") or accelccated rating is being performed. Notifiption must be received by the Division within 21 ralmdar days of the demonstration of chronic WET in the routine required tat. 'Demonstration' for the purpose of Parts I.B.4(b),(c),(d), (e) and (g) means ao later than the last day of the labotazory ta[. (c) Automatic Compliance Schedule Uoon Failure of Tat If a routine chronic WET tat is failed, the following automatic compliance schedule shall apply. As pan of this the perntittee shall either: (i) proceed [o conduct the IYI'IlfIE investigation as described in Pan I.B.4.e, or (ii) conduct accelerated taring string the single specie found to be more sensitive. If accelerrted [acing is being performed, the permittee shall provide written notification of the results within 14 plendar days of completion of the "Pattern of Toxicity"1"No Toxicity" demonstration. Ta[ing will be at (east once every two weeks for up to five tats until; 1) two consecutive cats fail or three of five tau fail, is which case a pattern of toxicity has been demonsaaud or 2) two wnsecu[ive arcs pass ar three of five tars pass, in which case no pattern of toxicity has been found. Amendment No. 2 Issued FEB 1 9 1997Eff«tive APR 0 1 1997 ~.