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999 <br /> /11 - lq -77- 378 <br /> 1'1 iation Work Plan: Pride of the West Tailings 4F' <br /> Remediating PartX: Sunnyside Gold Corporation In <br /> P.O. Box 177 <br /> Silverton, CO 81433 <br /> contact William B. Goodhard <br /> Resident Manager <br /> Identification of Lands <br /> Historic pre Reclamation Act tailings at the old townsite of Howardsville, San Juan County <br /> Colorado. See attached location and site maps. <br /> Identification of the Waters of the United States Potentially Affected <br /> Cunningham Creek and Animas River at and above confluence. See attached site map. <br /> Physical_Description of Conditions <br /> An old tailings pond, pre Reclamation Act, is exposed to rainwater, stormwater and <br /> groundwater springs under and near the tailings. Exposure of these materials to water should be <br /> controlled. There is a total measured estimate of 64,000 cubic yards. <br /> Site Loading Estimate <br /> Based on limited information, the site loading estimate for this project site is based on: <br /> Adits- <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 /> Annualized loading was calculated using rainfall data (proportionally adjusted for site <br /> elevation between the Silverton and Red Mountain weather stations), exposed area of waste dump <br /> or tailings site and loading based on 1:1 water bath test results. For comparison to adit flow loadings <br /> projects, the annualized loading was converted to an average daily loading. <br /> Based on these assumptions and procedures, SGC estimates that the average daily loading for <br /> this site may be as much as 43.0 pounds of dissolved zinc per day. SGC is under no obligation to <br /> defend these estimates and they should only be used as an estimate. SGC does not represent that <br />