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PART I <br />Page viii <br />Permit No. CO-0000396 <br />B. t\TONTTORING REQUIItEMENTS <br />2. Reportine of Data (continued) <br />The fast duplicate signed copy of each discharge monitoring report (DMR) shall be submitted to the following agency: <br />U.S. Envitonmental Protection Agency <br />Water Management Division <br />NPDES Branch 8WM~ <br />999 18th Street, Suite 500 <br />Denver, CO 80202-2466 <br />The third and fourth copies are for the permittee records. The Discharge Monitoring Report forms shall be filled out <br />accurately and completely in accordance with requirements of this permit and the instructions on the forms. They shall <br />be signed by m authorimd person u identified is Part I.D. <br />3. Acute W1;T Testine-Outfalls 004. 023.024 snd 026 <br />(a) Testine and Reportine Reouirements <br />Tests shall be done at the frequency listed in Part I.B.1. Test results shall be reported along with the Discharge <br />Monitoring Report (DMR) submitted for the reporting period during which the sample was taken. (i.e., WET testing <br />results for the first calendar quarter ending March 31 shall be reported with the DMR due Apri128.) The results <br />shall be submitted on the Acute Toxicity Test report form, available fiom the Division. Copies of these reports are <br />to be submitted to both the Division sad EPA along with the DMR. <br />The permittce shall conduct each acute WET test in general accordance with methods described in Methods for <br />Measurine the Acute Toxicity of EfFluenta and Roceivin¢ Waters to Freshwater and Marine Oreenisma, EPA/600/4- <br />90/027 or the most current edition, except as modified by the most current Division guidance document entitled <br />Guidelines for Conductive Whole Effluent Toxicity Teats. The permittee shall conduct an acute 48-hour WET test <br />using Daphnia Maena sp., and an acute 96-hour WET test using fathead minnows. Acute tests will be replacement <br />static tests of a single efFlumt grab sample. <br />(b) Failure of Test end Division Notification <br />An acute WET test is failed whenever the LCD, which represents an estimate of the effluent concentration which is <br />lethal to 50 % of the test organisms in the time period prescribed by the test, is found to be less then or equal to <br />100% effluent. The permittee must provide written notification of the failure of a WET test to the Division, along <br />with a statement as to whether the Preliminary Toxicity Incident ('PTI')/Toxicity Identification Evaluation ('TIE') <br />investigation or accelerated testing is being performed (see next section). Notification must be received by the <br />Division within 14 calendar days of the demonstration of acute WET in the routine required test. <br />'Demonstretion' for the purposes of Parts I.B.4(b),(c),(d) and (t) means no later than Ute last day of the laboratory <br />test. <br />(c) Automatic Compliance Schedule Upon Failure of Test <br />If a routine acute WET test is failed, the following automatic compliance schedule shall apply. As part of this the <br />permittce shall either: <br />(i) proceed to conduct the PTT/T1E investigation as described in Part I.B.4.(d), or <br />(ii) conduct accelerated testing ruing the single species found to be more sensitive. <br />If accelerated testing is being performed, the permitlce 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 <br />least once every two weeks for up to five tests until 1) two consecutive tests fail or three of five tests fail, in which <br />case a pattern of toxicity has bcen demonstrated or, 2) two consecutive tests pass or three of five tests pass, in <br />which case no pattern of toxicity has been found. <br />mnar wAr <br />