2018-10-22_REVISION - M2008078 (12)

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PART I Page 22 of 67 Permit No.:COG500000 1. WET Test Requirements a. Acute Testing Requirements: For facilities where acute WET testing is required,the permittee shall conduct an acute 48-hour WET test using Ceriodaphnia dubia,and an acute 96-hour WET test using Pimephales promelas. Acute tests shall be conducted as a static replacement test using a single effluent grab sample. The permittee shall conduct each acute WET test in accordance with the 40 CFR Part 136 methods described in Methods for Measuring the Acute Toxicity of Effluents and Receiving Water to Freshwater and Marine Organisms, Fifth Edition,October 2002(EPA-821-R- 02-012)or its most current edition. b. Chronic Testing Requirements: For facilities where chronic WET testing is required,the permittee shall conduct the chronic WET test using Ceriodaphnia dubia and Pimephales promelas,as a static renewal 7-day test using three separate composite samples. The permittee shall conduct each chronic WET test in accordance with the 40 CFR Part 136 methods described in Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Water to Freshwater Organisms, Fourth Edition,October 2002(EPA-821-R-02-013)or the most current edition. For the chronic Ceriodaphnia dubia test,the termination requirement shall be where 80%or more of the surviving control females having produced their third brood. If this requirement is not met,the test is considered invalid and retesting must be performed during the monitoring period. The permittee will be required to submit documentation showing that the appropriate number of the surviving control females have had their third brood with the WET information summary that is submitted to the Division with the WET test results. c. Acute and Chronic Testing Requirements: The minimum dilution series to be used at the facility will be specified in the certification. If the permittee uses more dilutions than prescribed,and accelerated testing is to be performed,the same dilution series shall be used in the accelerated testing as was used in the failed test. All WET tests shall be done at the frequency listed in Part I.C.1. Test results shall be reported along with the Discharge Monitoring Report(DMR)submitted for the end of the reporting period when the sample was taken.(i.e.,WET testing results for the calendar quarter ending March 31 shall be reported with the DMR due April 28,etc.) The permittee shall submit all laboratory statistical summary sheets,summaries of the determination of a valid, invalid or inconclusive test,and copies of the chain of custody forms,along with the DMR for the reporting period. If a test is considered invalid,the permittee is required to perform additional testing during the monitoring period to obtain a valid test result. Failure to obtain a valid test result during the monitoring period shall result in a violation of the permit for failure to monitor. 2. Toxicity Reopener This permit may be reopened and modified to include additional or modified numerical permit limitations, new or modified compliance response requirements,changes in the WET testing protocol,the addition of both acute and chronic WET requirements,or any other conditions related to the control of toxicants. E. GENERAL MONITORING AND SAMPLING REQUIREMENTS — Process water and stormwater 1. Monitoring Periods and Monitored outfalls Monitoring requirements in this permit begin in the first full month following the permit effective date. Applicable monitoring requirements apply to each outfall authorized by this permit,except as otherwise exempt from monitoring as a"substantially identical outfall"(for stormwater only-see Part I.H.1 of the permit). 2. Representative sampling and Monitoring points Samples and measurements taken for the respective identified monitoring points required in the permit certification shall be representative of the volume and nature of the wastestream and/or effluent. Monitoring points shall be so designed or modified so that a sample of the effluent can be obtained at a point after the final treatment process and prior to discharge to state waters. All samples shall be taken at the monitoring points specified in the permit certification and,when specified, before the effluent joins or is diluted by any other wastestream, body of water,or substance. Monitoring points shall not be changed without a modification request submitted to and approval by the Division. The permittee shall provide access to the