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August 1999 Monthly Report <br /> Page 3 <br /> • Tailings Pond No. 4 Surface Drainage Modification <br /> This project was not active in August. <br /> • Tailings Pond No. 4 Upland Groundwater Diversion <br /> Discussions are ongoing with BLM to implement this project in exchange for an area to <br /> place material from their Lackawanna project. <br /> Cement Creek Diversion and Water Treatment <br /> Following notice, Cement Creek diversion and water treatment was suspended on June 1, <br /> 1999. Sunnyside will evaluate whether resumption of Cement Creek diversion and <br /> treatment will occur in September. <br /> The August 1999 monitoring results for; dissolved metals in the AT-004 discharge; <br /> Cement Creek (CC-1); American Tunnel flow before treatment (AT-INFEL); and <br /> Cement Creek below the AT-004 discharge point (CC-20) are attached to this report. <br /> Since Sunnyside is not diverting and treating Cement Creek, the reported values (CC-1) <br /> are quality and flows for Cement Creek near the diversion. <br /> Mainstem Stream Monitoring and Reference Point Stream Monitoring <br /> Sunnyside sampled the reference point (A-72) on August 4, 1999. Results from this <br /> sample are attached. BOR personnel sampled the other three gaging stations (A-68, <br /> M-34, and C-48) in August. <br /> The provisional flow at A-72 on August 4, 1999 was 584 cfs which places this sample <br /> result in the high flow category (Q>300cfs). The dissolved zinc value for this sample, <br /> obtained by averaging the results from two labs, was 237 ug/l. <br />