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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/diversion ditch had <br />been excavated. Projection completion is planned for December. <br />