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.. Battle Mountain ,o id Recommended Compliance Schedu'? July 22, 7992 (Permit No: t4-88-112) In accordance with paragraph (5,b> of the June 25, 1992 additional corrective action Order issued by the Board, the Division recommends the follo~inq schedule for achieving compliance with the permit cyanide standardsibe imposed upon BMRI as an addiitonal corrective action Order (see attached). The permit standards for cyanide are 4.4 ppm total cyanide and 3.8 ppm WAD cyanide. (1) BMRI has implemented their Hydrogen Peroxide Tailings Treatment, as described in their TR-007 application, in their active lower tailings pond, since June 15, 1992. In doing so BMRI demcnstrated that the process is capable of reducing the WAD cyanide level to 15 ppm r less in in an active tailings pond, and 10 ppm or less in an inactive t flings pond. BMRI shall continue to add hydrogen peroxide directly to both tailings ponds' liquid pools, at appropriate rates, in order to achieve and maintain these levels. If the WAD cyanide levels exceed th~se limits then BMRI must take corrective action. (Z) BMRI is to use all reasonably practical steps to continue to to er the cyanide levels in all tailings ponds to the lowest reasonably achievable levels, and to continue to use its best efforts at all times toyachieve that goal. (3) BMRI shall commence operation of the INCO SO2/Air Tailings Trea{ment Process as soon after approval as possible, in accordance with he schedule for implementation contained in TR-010. When BMRI com ences operation of the INCO process it shall bring both tailings pond into compliance with the permit standards as soon as possible. (4) As included within the "June Order", BMRI shall expeditiously c mplete the ground water monitoring improvements proposed in TR-008, an complete development of the containment plan proposed in TR-C09. If BMR fails to meet any of the imposed deadlines, cr any leakage is detected f om the tailings impoundment, BMRI shall cease operation of the ore processing plant. JP/7P Doc No: 2387E (Condensed Version of Doc. 2380F, Revised July 20, 1492)