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-z- 1. Increased Tailings Area Security: Statue Completed. BMRI completed all Board ordered tailings area security. The Di rsion has set process water cyanide standards, (see February 24, 1993 report) hat if not met will trigger automatic resumption of the security as originally ordered by the Board. CCCD Ovestion: Your February 24, 1993 report states that securit will resume if pH exceeds 9.0 and/or WAD cyanide exceeds 10 ppm. Are these the standards the Division is now using? Division Answer: The Division ie enforcing the permit standards ~f 3.8 ppm weak acid diseociable cyanide and 4.4 ppm total cyanide. The Divieio will pursue a violation against BMRI if cyanide concentrations exceed permit s andarda at any sample point the operator or the Division monitors process water Security was enforced by the Board and the Division when cyanide concentratio s exceeded levels considered potentially harmful to humans or wildlife, i.e approximately 40-50 ppm. The Division selected pH 9.0 and WAD cyanide of 10 p m as standards at which security would resume because while these levels are et 11 safe for humane and wildlife such values would indicate a rising trend to and unsafe levels which would require security. 2. Assessment of Environmental Imnact: Status: Completed. BMRI submitted an acceptable report April ~~3, 1992. 3. Accelerated Freguencv of Environmental Monitoring: Status: In Compliance. BMRI ie now monitoring and reporting in accordance with approved technical revision nos. 6 and 10. The Division reviews each report as it s received. No significant problems have been noted. ~I CCCD Question: We have yet to see any results from Ann Maest's independent monitoring. What has happened to them? Division Answer: BMRI has provided a copy of each third party monitoring report to Maclovio Martinez, Coetilla County Assessor, and member of the Coetilla County Conservancy District. These copies are placed with other required monitoring reports in a binder for public use at the county buil ing. Another copy is sent to the senior high school in San Luie and these are laced in a binder in the school library. The Division has agreed to send cc~ies of the third party reports to Nora Jaquez, Attorney, far CCCD use in thpJ Denver area. 4. Tailings Cyanide Detoxification: Status: Ongoing. BMRI ie complying with all Board Orders and the permit in regard ~to tailings pond and collection pond water cyanide concentrations. The effluent from the tailings underdrain system still requires additional treatment tqq achieve compliance in the collection pond. The tailings placed during thle period of non-compliance still require further detoxification. BMRI is detoxifying their plant tailings slurry using the INCO rde destruction circuit which began to function properly approximatel November 15, 1992. The company ie meeting compliance requirement for concentrations of WAD and Total Cyanide at all process water moni oring sites. BMRI ie meeting compliance requirements for cyanide in the collet non pond by treating this water with hydrogen peroxide ae it flows into the p~nd from the tailings area underdrain system. This treatment will continue until the tailings are detoxified to the point that water flowing to the collection pond meets permit standards and hydrogen peroxide treatment ie no long~r needed.