1992-04-05_REVISION - M1988112 (3)

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Battle Mountain Gold Notice of Probable Violation Abatement Requirements (Permit No: M-88-112) As abatement for the Notice of Probable Violation issued to Battle Mountain Gold (BMG) on March 31, 1992, the Division imposes the following performance requirements. (1) Immediate Increased Tailings Area Security: BMG shall develop and implement a Tailings Area Security program, in order to safe guard the health and safety of the general public and wildlife. The plan shall be submitted to the Division as soon as possible for review and approval. In the interim, BMG shall implement whatever increased surveillance it deems appropriate to control the site. (2) Immediate Assessment of Environmental Impact: BMG shall review all available environmental monitoring data collected to date, including its approved ground and surface water monitoring sites, air quality monitoring sites, the tailings pile leak detection system, the processing plant circuit, and any other applicable monitoriing facilities. A report summarizing its initial findings shall be submitted to the Division by Friday, April 10th. (3) Accelerated Frequency of Environmental Monitoring: The frequency of monitoring of the environmental monitoring facilities referenced in item (2) above shall be accelerated to bi-weekly, commencing immediately and continuing until relaxation is approved by the Division. The initial samples shall be submitted to an EPA certified laboratory for "rush" analysis. Subsequent samples may be processed normally. The results of each set of sample analyses, covered with an appropriate brief summary letter report, shall be submitted to the Division within three days following completion of the analyses by the laboratory. (4) Tailings Cyanide Detoxification: BMG shall develop and submit a plan for cyanide detoxification of the entire slurry and liquid contents of the tailings impoundment ds soon as possible for review and approval by the Division. This plan shall be submitted as a technical revision application. This application shall include a schedule for implementation. Following approval of this technical revision, BMG shall implement the treatment method in accordance with the plan. Appropriate frequency and distribution of monitoring of the tailings and plant circuit shall be proposed within thew application and subsequently conducted to verify the progress and success of the remedial treatment. Monitoring results, covered by an appropriate cover letter report shall be submitted to the Division weekly during the detoxification program.