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July 1998 Monthly Report <br /> Page 2 <br /> reduced and that the Koehler drainage may account for most of the <br /> remaining loading from the site with some type of storage and <br /> release process occurring. <br /> Monitoring data from samples taken in July at the Gold Prince Mine <br /> site are attached. <br /> The Terry Tunnel bulkhead annual inspection was completed in July. <br /> It appears to be functioning as designed although there is minimal <br /> pressure because the mine pool surface is still below the bulkhead <br /> level. A sample was taken and the results are included with this <br /> report. <br /> - Sunnyside Mine Pool Mitigation - Alkaline Solution Injection <br /> This project was not active in July 1998. The water pool pH, <br /> at the American Tunnel bulkhead, on July 29, 1998, was 2.83 and <br /> the bulkhead pressure was 354 psi. <br /> Sunnyside will continue to monitor these 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 <br /> until it becomes evident that the work plans for these <br /> projects require implementation. <br /> - Cement Creek Diversion and Water Treatment <br /> Cement Creek diversion and water treatment was active <br /> continuously throughout July. The flow of Cement Creek in <br /> July remained at levels that required control on the water <br /> treatment system inlet quantity. The flow diverted and treated <br /> in July ranged from 945 G.P.M. to 1166 G.P.M. <br /> Attached are July, 1998 monitoring results for; dissolved <br /> metals in the AT-004 discharge; Cement Creek diverted for <br /> treatment (CC-1B) ; American Tunnel flow before treatment (AT- <br /> INFEL) ; and Cement Creek below the AT-004 discharge point (CC- <br /> 20) . <br />