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.. ` <br />COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />~, Rationale - Page 14 Permit No. CO-0043168 <br />1. Monitorine: (Continued) <br />As indicated above in Table VI-4, the monitoring frequency for the <br />metals is on a weekly basis. If, after a year of monitoring data, <br />the metals concentrations are at low enough levels to qualify for <br />consideration of a less frequent monitoring frequency, then the <br />permittee should submit a permit amendment requesting the Division <br />to reevaluate the monitoring frequency for .the metals. <br />2. Reporting: Golden Hile Joint Venture must submit a Discharge <br />Monitoring Report (Dt4t) on a monthly basis to the Division. This <br />report should contain the required summarization of the test <br />results for parameters shown in Table VI-4 and Part I.B.1 of the <br />permit. See the permit, Part I,B for details on such submission. <br />3. Additional Monitorine and Reoortine - Four Time Analvsis: As <br />indicated in Part I.B.3 of the permit, a four time analysis is <br />required at discharge point 001 for Potentially Dissolved <br />Hexavalent Chromium and Potentially Uissolved Nickel. These two <br />parameters are required for the four time analysis because <br />concentrations of these two metals were detected (total chromium <br />0.009 mg/1, and total recoverable nickel 0.12 mg/1) in the mine <br />water at levels which warrant an additional. monitoring assessment <br />For further details, see Part I,B.3 (on page lc of the permitl. <br />D. Additional Terms and Conditions <br />1. iaterials Contairunent Plan The permittee will be required to <br />submit a Materials Containment Plan. The plan shall address the <br />prevention and containment of spills and materials used, processed <br />or stored at the facility which, if spilled, would have a <br />reasonable probability of having a visible or otherwise detrimental <br />impact on waters of the State. This plan is to be submitted within <br />90 days of the effective date of the permit. See Part I.E. of the <br />permit. <br />E. Specific Compliance Requirements <br />1. Submissions to the Division: The following are specific compliance <br />items which require permittee action. Please check the referenced <br />parts of the permit for details on what is required. <br />Office Permit <br />Code Event Citation Due Date <br />90508 Materials Containment Part I.E 90 days after <br /> Plan effective date <br /> of permit <br />90708 Four-Time Analysis Part I.B.3 45 days after <br /> of Two Metals each sampling date <br /> (See permit) <br />