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S III I II I II I II IIII III <br /> 999 <br /> 77--3 7o"Zemediation Work Plan: Surface Mill Tailings at Eureka <br /> 96 <br /> Remediating Part Sunnyside Gold Corporation �V M <br /> P.O. Box 177 <br /> Silverton, CO 81433 <br /> contact William B. Goodhard <br /> Resident Manager <br /> Identification of Lands <br /> Historic surface tailings disturbance at abandoned townsite of Eureka, located in San Juan <br /> County Colorado. See attached general location map and site map. <br /> Latitude 37 degrees 53 minutes Longitude 107 degrees 34 minutes <br /> Identification of the Waters of the United States Potentially Affected <br /> ed <br /> Animas River between confluence of Eureka Creek and confluence of Minnie Gulch. See <br /> attached map. <br /> Physical Description of Conditions <br /> The southern half of the old townsite of Eureka may have been impacted by milling operations <br /> in the early part of the century. The historic tailings are confined to two large ponds as well as <br /> smaller scattered locations throughout the southern half of the townsite. The total measured <br /> estimated volume is 65,500 cubic yards. These tailings are exposed to rain waters, snow melt and <br /> during high flow to the Animas River and the South Fork of the Animas River. As a result, there may <br /> be an impact on the Animas River. The area also has an adverse visual impact. <br /> Site Loading Estimate <br /> Adits- <br /> Based on limited information, the site loading estimate for this project site is based on: <br /> Using available data, zinc loading was calculated based on the average flow and average zinc <br /> values. <br /> Mine Waste Dumps and Tailings Piles- <br /> Site composite soil samples were tested using a water bath extraction. This test consists of <br /> exposing a 1:1 ratio by weight of material to deionized water. The mixture is briefly mixed then <br /> allowed to set for 30 minutes. The sample was then filtered ( 0.45 micron) and analyzed for metals. <br />