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J r PART I Paga iv Pt:rtnit No. CO-0034142 A. TERMS AND CONDITIO^IS 1. Effluent Limitations (continued (c) Outfa11023 Effluent Parameter Discharge Limitations 30-Dav Ave a/ 7-dav Ave h/ Dailv Max c/ Flow, MGD O.Ol2 N/A Report BODS, mg/P (Ibs/day) 30 (3.0) 45 (4.5) N/A Total Suspended Solids, mg/P (Ibs/day) 75 (7.5) 110 (11.0) N/A Oil and Grease, mg/P N/A N/A 10 pH, s. u. (minimum-maximum) N/A NIA 6.5-9.7 Total Residual Chlorine, mg/P N/A N/A 0.5 Fecal Coli(orms, No./100 ml 6,000 12,000 N/A 2. Whole Effluent Toxicity-Chronic Lethality Limitation -Outfalls 003. 022 and 024 Beginning Aoril 1 1997, and lasting through March 31, 1999, there shall be no statistically significant difference in lethality (at the 95'Y conl~idence level) between the control and any efFluent concentration less than or equal [0 11.590 effluent. Such limitation shall apply as a daily maximum. 3. Burden of Proof Requirements The permittze has the burden of proof when seeking relief from settleable solids (SS) limitations. C~ischarges from outfalls 004, 007, 009, OI I - 021 are eligible for this exemption. Relief may be granted for each discharge occurrence only when necessary and shall not be granted when the permiitee has control ovzr the discharge. The permittee should endeavor to meet the primary limitations whenever possible. a) For rainfall, to waivt: settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after precipitation greater than the (0-year, 24-hour event has stopped. h) For snowmelt. to waive seuleablz solids limitations, it is necessary to prove that discharge occurred within 43 hours after pond inflow volume greater than the 10-year, 24-hour event has stopped. Should a precipitation event or snowmelt occur, the perminee shall submit adequate proof in order fir an exemptton to bz claimed. Weather station data may be appropriate in making this demonstration. Said proof shall be submitted as an attachment to the Discharge Monitoring Report (DMR) for the appropriate period. The Division shat{ determine the adequacy of proof. As p.ut of this determination, the Division shall evaluate whether the permillee could have controlled the discharge i~a such a manner that primary limitations could have been met. All manual dzwatering of the ponds shall meet settleable solids limitations. 4. Salinity Parameters In order to obtain an indication of the quantity of Salinity being discharged from the site, the permil!ee shall monitor the wastewater efFluent for total dissolved solids at the following frequencies: Outfall Frequency Sample Tvoe 003, 004, 007, 009, 011, 012, O13, 014, OIS, Quarterly Grab 016, 017, 018, OI9, 020, 021, 022, 023 and 024. Self-monitoring samples taken in compliance with [he monitoring requires specified above shall be taken a[ those locations listed in Part i.Et.l. Amendment No. I Issued Effective See Parl LC. for Delinitinns.