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The Oliver Mine adit samples are dominated by sodium and bicarbonate ions. Total dissolved solids concentrations range between <br />1,050 and 1,900 mgA. The Nonh Fork will be the receiving drainage for any discharge from the West Elk Mine. The standards for <br />boron were exceeded slightly on three occasions. The standazds for total iron, selenium and zinc were exceeded on just one occasion. <br />None of the exceedences were of a magnitude that was likely to result in degradation of stream quality below the standards for the <br />North Fork of the Gunnison. <br />CUMULATIVE HYDROLOGIC EFFECTS ON GROUND WATER <br />AND SURFACE WATER RESOURCES -FINDING <br />An assessment of the probable hydrologic consequences of the mining operation and an assessment of the probable cumulative impact <br />of all anticipated mining in the general area on the hydrologic balance has been made. Pursuant to Rule 2.07.6(2)(c), the Division <br />finds that the Sanborn Creek and Sanborn Creek East additions to the Somerset mining operation have been designed to prevent <br />material damage to the hydrologic balance outside the permit area. ~ l~ S <br />t• 0 ~ <br />Y/ t' 1~ S ~L L <br />~, ~ <br />• <br />• % 20 <br />