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�a� <br /> II I I II I II I II IIII III <br /> sss <br /> AL <br /> Sttt1 NYSIDE GOLD COSIVORAVON RECEIVES) <br /> AN ECHO DAY COMPANY <br /> 3 6rA6 <br /> P.O. Box 177 • Silverton, CO 81433 <br /> Phone (970) 387-5533 • Fax (970) 387-5310 Division of Minerals&Geology <br /> Attn: Ron Zdyb <br /> Mail Code: 8D2-W-GW <br /> U. S. Environmental Protection Agency <br /> Underground Injection Control (UIC) <br /> 999 18"' St., Suite 500 <br /> Denver, CO 80202-2466 <br /> RE: EPA File No. C0500-03745, San Juan County, Colorado <br /> 2nd Quarter 1999 Report (April —June) <br /> Dear Mr. Zdyb: <br /> In accordance with the quarterly reporting requirements of EPA's June 26, 1996 Rule <br /> Authorization letter for injection of water and alkaline material into the Sunnyside Mine, <br /> Sunnyside Gold Corporation (SGC) submits the following report. This report covers the <br /> period from April 1, 1999 through June 30, 1999. <br /> Terry Tunnel Bulkhead <br /> The Terry Tunnel bulkhead was inspected on June 28, 1999. During this inspection, a <br /> pressure gage was installed since the mine pool is now at this level. The pressure was <br /> 11.5 psi. In the 3`d quarter this gage and the American Tunnel gage will be checked <br /> against each other by reading them on the same day. A sample was also taken from the <br /> pool behind the bulkhead. Analytical results have not been received and will be reported <br /> with the 3rd quarter report. Field parameters were: temperature 8.4° Cl- conductivity <br /> 2000 umho, and pH 6.99. <br /> Inspection of the bulkhead and immediate tunnel area did not reveal any reason for <br /> concern or give any indication that the bulkhead is not performing as designed. The <br /> bulkhead valve was opened to accept pump back from the Terry Tunnel settling ponds to <br /> eliminate any potential for pond discharge. <br />