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November 1999 Monthly Report <br /> Page 2 <br /> Sunnyside submitted completion certifications in October, 1997. <br /> • Sunnyside Mine Pool Mitigation—Alkaline Solution Injection <br /> This project was not active in November of 1999. <br /> The water pool pH, at the American Tunnel bulkhead, was 4.87 and the bulkhead gage <br /> read 420 psi at the end of November. This would indicate that a rise in the mine pool <br /> occurred since the end of October (2 feet). Sunnyside will continue to monitor these <br /> parameters. <br /> "B List" Projects <br /> • Columbus Mine Portals— Mine Waste Dumps <br /> • London Mine Portals—Waste Dumps <br /> Work, permitting or arrangement for access is not planned until it becomes evident that <br /> the work plans for these projects require implementation. <br /> • Mayflower Facility—Upland Hydrological Control <br /> This project was completed in October, 1999 and accepted by DMG as complying with <br /> the Consent Decree work plans and MLR Standards in November, 1999. <br /> • Tailings Pond No. 4 Surface Drainage Modification <br /> This project was completed in November, 1999 and inspected by DMG for compliance <br /> with the Consent Decree work plan and MLR Standards. <br /> • Tailings Pond No. 4 Upland Groundwater Diversion <br /> Sunnyside had been holding discussions with BLM to implement this project in exchange <br /> for an area to place material from their Lackawanna mill tailings remediation project. <br /> Since it became apparent that the work on this project would not be completed by BLM <br /> in the allotted time frame, Sunnyside assumed project construction. By month end, the <br /> work area had been stripped of overburden material to the impermeable clay seam found <br /> in the exploratory holes and approximately 400 feet of interception/d 1 version ditch had <br /> been excavated. Projection completion is planned for December. <br />