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COLORADO DEPARTMENT OF PUBLICHEALTHAND ENVIRONMENT, Water Quality Control Divir:bn Rationale -Page 8, Permit No. CO-0036251 VI, TERMS AND CONDITIONS OFPERMIT B. Monitoring (Continued) 2. Discussion of Changes in Monitoring: Monitoring requirements for this facility, with the exception ofTotaT Radium 226+228, dissolved Radium 226 and WET testing requirements, remain unchanged from those found in the prior permi[. The Division had previously determined that mare frequent monitoring (weekly) was necessary jor the radian: parameters because ofradium violations that had occurred during an earlier renewal period Since there have not been any exceedances of the radium limitations during the last five years, this renewal retunes the monitoring frequency for the radium parameters to a monthly basis. Ina 1996 amendment to the permit, the Division had reduced the acute WET testing to a semiannual frequency on an alternating basis, where tests for Ceriodnnhnia species were performed semiannually for the period of July 1 through December 31; and tesu jor fathead minnows (Pimeohales oromelas) were conducted semiannually for the period from January 1 through June 30. G[ven that the Cotter Corporation has demonstrated compliance with acute WET tests since the previous renewal permit, this renewal permit eliminates the requirement to conduct acute WET testing. C. Reporting Discharge Monitoring Reoort: The Cotter Corporation must submit a Discharge Monitoring Report (DMR) on a monthl basis to the Division. This report should contain the required summarization of the test results jor parameters shown in Table VI-3 and ParK LB.1 of the permit. See the permit, Part LE.1. for details on such submission The US Environmental Protection Agency (EPA) no longer requires submittal to them ofduplicate copies of discharge mom'toring reports for minor faciliY['es. Therefore, the EPA Region VIII has been eliminated from Part LE 1. of the permit (Routine Reportng ofDnta). 2. Soecta/Reports: Special reports are required in the event of a spill, bypass, or other noncompliance. Please refer to Part LE. of the permit for reporting requirements. As above, submittal of these reports to the EPA Region VIII is no longer required D. Additional Terms and Conditions 1. Signatory and Certification Reauirements: Signatory arvd certification requirements for reports and submittals are discussed in Part IE.6. of the permit. 2. Comoliance Schedules: a. Materials Containment Plan: The permittee has previously submitted an engineered spill plan with the permit application. An update to the plan is required to be filed within 90 days of the permit effective date, detailing all changes that hove occurred since the original submittal. If no changes have occurred, a letter to this effect is required. For speck requirements, refer to Part LD.I. of the permit. E. Specifrc Compliance Requirements 1. Submissions to the Division: The following are specific compliance items that require permittee action. Please check the referenced parts of the permit for details on what is required. 90199 Stormwater Management Plnn Annual Report Part I E.2.f Due on or before Febtunry /5 of the following calendar year. 90508 Materials Cauainment Plnn -Update LD.1. 90 days after effective date