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PART I <br />Page vii <br />Permit No. CO-004216I <br />• <br />B. MONITORING REQUIREMENTS <br />3. Chronic WET Testinte - Outfall 001 <br />(a) Testin¢ and Renortine Requirements <br />Tests shall be done at the ft~auencv listed in Patt I.B.1. Test results shall be reported on the Discharge <br />Monitoring Report (DMR) submitted for the reporting period during which the sample was taken. (i.e., WE'f testing <br />results for the fits[ calendar quarter egding March 31 shall be reported with the DMR due April 28.) The results <br />shall be submitted on the Chronic Toxicity Test report form, available from the Division. Copies of these reports <br />are to be submitted to both the Division and EPA along with the DMR. <br />The permittce shall cgaduct each chronic WET test is general accordance with methods described Short Term <br />Methods for Estimatintr the Chronic Toxicity of Effluents and Receivin¢ Waters to Freshwater Or¢anisms, <br />EPA/600/4-89/001 or the most curregt edition, except as modified by the most current Division guidance document <br />entitled Guidelines for Conductin¢ Whole Effluent Toxicity Tests. The permittee shall conduct such tests using <br />Ceriodaphnia dubia and fathead minnows. <br />(b) Failure of Test and Division Notification <br />Begiming immediately, a chronic WEI' test is failed whenever there is a statistically significant difference in <br />lethality between the control and any effluent concentration less than or equal to the iastream waste concentration <br />("IWC'). The IWC for this permit bas been determined to be 47°k. The permittce must provide written <br />• notification of the failure of a WET test to the Divisioa, along with a statement as to whether a Preliminary Toxicity <br />Investigation ('PT[')!1'oxicity Identification Evaluation ('TIE') or accelerated testing is beiag performed. <br />Notification rota[ be received by the Division within 21 calendar days of the danonstration of chronic WET in <br />the routine required test. 'Demonstration' for the purposes of Paris I.B.4(b),(c),(d), (e) end (g) means ao later <br />than the last day of the laboratory test. <br />(c) Automatic Comoliance Schedule Uoon Failure of Test <br />If a routine chronic WET test is failed, the following automatic wmpliance schedule shall apply. As part of this the <br />permittee shall eiWer: <br />(i) proceed to conduct the PTI/I'fE investigation as described in Part I.B.4.e, or <br />(ii) conduct accelerated testing using the single species found to be more sensitive. <br />If accelerated testing is being performed, the permiltee shall provide written notification of the results within <br />14 calendar days of completion of the "Pattern of Toxicity"/"No Toxicity" dmronctration. Testing will be at <br />least once every two weeks for up to five tests until; 1) two consecutive tests fail or three of five teats fail, in which <br />case a pattern of toxicity has bees demonstrated or 2) two coasxutive tests pass or throe of five tests pass, is which <br />case no pattern of toxicity has been found. If no paaem of toxicity is found the toxicity episode is considered to be <br />ended and routine testing is to rtsume. If a pattern of toxicity is found, a PT7/TIE investigation is to be performed. <br />If a pattern of toxicity is not demonstrated but a significant level of erotic toxicity is found, the Division may <br />require an increased frequency of routine monitoring or some other modified approach. <br /> <br />neoae u9ro3 <br />