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October 1998 Monthly Report <br /> Page 2 <br /> - Sunnyside Mine Pool Mitigation - Alkaline Solution Injection <br /> This project was not active in October 1998. The water <br /> pool pH, at the American Tunnel bulkhead, was 3 .87 and the <br /> bulkhead pressure was 363 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 /> Sunnyside has continued towards implementation of the work <br /> plans submitted for addition under the Consent Decree as <br /> "B List" projects. Based on CDPHE's assurance that they <br /> will become "B List" projects, Sunnyside has included them <br /> under the MLR and Stormwater permits and began <br /> construction on the Mayflower Facility - Upland <br /> Hydrological Control project. <br /> - Cement Creek Diversion and Water Treatment <br /> Cement Creek diversion and water treatment was active <br /> continuously throughout October. The flow of Cement Creek <br /> in October was below the treatment system's capacity and <br /> the entire flow was diverted for treatment. The flow <br /> diverted and treated in October ranged from 409 G.P.M. to <br /> 708 G.P.M. <br /> Attached are October, 1998 monitoring results for; <br /> dissolved metals in the AT-004 discharge; Cement Creek <br /> diverted for treatment (CC-1B) ; American Tunnel flow <br /> before treatment (AT-INFEL) ; and Cement Creek below the <br /> AT-004 discharge point (CC-20) . <br />