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t 999 III <br /> i(UrmYSIDE GOLIZ CORPORATION <br /> AN ECHO DAY COMPANY <br /> P.O. Box 177 .Silverton, CO 81433 <br /> Phone (303) 387-5533 .Telecopy (303) 387-5310 <br /> �`�cQ3ved <br /> April 16 , 1997 ��R <br /> M - 1g77- 37& <br /> j Attention: Ron Zdyb <br /> Mail Code: 8D2-W-GW L�^ �nCs�-•• <br /> ,.` <br /> U.S. Environmental Protection Agency y <br /> Underground Injection Control (UIC) <br /> 999 18th Street, Suite 500 <br /> Denver, CO �80202-2466 <br /> RE: - EPA File No. C05000-03745, San Juan County, Colorado <br /> - 1s7 Quarter 1997 Report (January - March) <br /> Dear Mr. Zdyb: <br /> In accordance with the quarterly reporting requirements of EPA's <br /> June 26, 1996 Rule Authorization letter for injection of water and <br /> alkaline material into the Sunnyside Mine, Sunnyside Gold <br /> Corporation (SGC) submits the following report. This e ort covers <br /> the period from January 1, 1997 through March 31, 996. dd <br /> Terry Tunnel Bulkhead <br /> The Terry Tunnel bulkhead valve was closed upon site <br /> demobilization. Fluid injection was suspended on October 9 , 1996 <br /> due to weather conditions at the site. This site will be <br /> inaccessible until around June 1 , 1997. The mine pool elevation <br /> was still below 11 , 600' elevation on March 31, 1997 therefore, <br /> bulkhead pressure should be at 8 psi . <br /> American Tunnel Bulkhead <br /> The American Tunnel bulkhead was inspected, gage pressure readings <br /> taken and fluid samples analyzed for pH, conductivity and <br /> temperature more frequently than the requirements of Items 3 . and <br /> 4 . in the Rule Authorization letter. This information is attached. <br /> The American Tunnel bulkhead valve has remained closed since <br /> closure on September 9, 1996 . <br /> Site inspections have not revealed any indication that the bulkhead <br /> is performing other than as designed. <br />