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N•J,('7,9 f!y, •, {~.,.,,r I'l. CO unur~ B. MONITORING REQUIREMENTS 3. Chronic WET Testine-Outfalls 003, 022 and 024 !continued) (b) Failure of Test and Division Notification (Prior to Effective Date of Limitation) Prior to the effective date of the limitation, a chronic WET test is failed whenever I) there is a statistically significant difference in lethality between the control and any effluent concentration less than or equal to the instream waste concentration ("I WC") and, 2) the ICzs, which represents an estimate of the efNuent concentration al which 25% of the test organisms demonstrate inhibition as reflected by lethality, is a[ any effluent concentration less than or equal to the I WC. The I WC for this permit has been determined to be I I.5%. The permittee must provide written notification of the failure of a WET test to the Division, along with a statement as to whether a Preliminary Toxicity Investigation ("PTI")/Toxicity Identification Evaluation ("TIE") or accelerated testing is being performed (see Part I.B.4.(d)). Notification must be received by the Division within 21 calendar days of the demonstration of chronic W ET in the routine required test. "Demonstration" for the purposes of Parts I.B.4(b),(c),(d) and (f) means no later than the last day of the laboratory test. (c) Failure of Test and Division Notification (Beeinnin2 on Effective Date of Limita[io1 Beginning on the effective date of the limitation, a chronic WET test is failed whenever there is a statistically significant difference in lethality between the control and any effluent concentration less than or equal to the instream waste concentration ("I WC"). The I WC for this permit has been determined to be I I.5%. "fhe permittee must provide written notification of [he failure of a WET lest to the Division, along with a statement as to whether a Preliminary Toxicity Investigation ("PTI")/Toxicity Identification Evaluation ("TIE") or accelerated lestin€; is being performed. Notification must be received by the Division within 21 calendar days of the demonstration ofchronic WET in the routine required test. "Demonstration" for the purposes of Pans LB.4(b),(c),(d), (e) and (g) means no later than the last day of the laboratory lest. The pemtittee must provide written notification of the failure of a WET lest [o the Division, along with a statement as to whether a Preliminary Toxicity Investigation ("PTI")R'oxicity Identification Evalualic7n ("TIE") or accelerated testing is being perforated. Notification must be received by the Division within 21 calendar days of the demonstration of chronic WET in the routine required [est. "Demonstration" for the purposes of PalYS 1.6.4(b),(c),(d), (e) and (g) means no later than the last day of the laboratory test. (d) Automatic Compliance Schedule Uoon Failure of Test If a routine chronic WET test is failed, the following automatic compliance schedule shall apply. As part of [his the permimee shall either: (i) proceed to conduct the PTIlTIE investigation as described in Part LB.4.e, or (ii) conduct accelerated testing using the single species found to be more sensitive. If accelerated testing is being performed, the permittee shall provide written notiification of the results within 14 calendar days of completion of the "Pattern of Toxicity"/"No Toxicity" demonstration. Testing will be at least once every two weeks for up to five tests until; I) two consecutive tests fail or three of five tests fail, in which case a pattern of toxicity has been demonstrated or 2) two consecutive tests pass or three of five tests pass, in which case no pattern of toxtcity has been found. If no pattem of toxicity is found the toxicity episode is considered to be ended and routine testing is to resume. If a pattem of toxicity is found, a PTI~f IE investigation is to be performed. If a pattern of toxicity is no[ demonstrated but a significant level of erratic toxicity is found, the Division may require an increased frequency of routine monitoring or some other modified approach.