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• <br />Comprehensive Analytical Results Report <br />Fast and West Willow Crcek <br />East Willow Creek metals concentrations in surface water and sediment samples are generally lower than <br />in West Willow Creek and Willow Creek. Below the Ridge Mine dump aqueous and sediment samples <br />exhibit elevated lead and zinc levels. In addition, the sediment samples are also elevated with respect to <br />arsenic, cadmium, and copper. Dissolved concentrations of lead and zinc exceed TVSs. The Solomon <br />Adit discharge is being captured and treated in a series of three ponds comprising the PMDTS, however, <br />the outflow from the PMDTS is not accessible for sampling, so the effectiveness of the PMDTS could not <br />be directly determined. <br />Willow Creek exhibits elevated concentrations for all surface water samples for both the dissolved and total <br />~,. fractions for cadmium, lead, manganese, and zinc. All sediment samples are also elevated for these <br />analytes as well as for arsenic, copper, and silver. Loading analyses reveal that West Willow Creek <br />~~s ntributes approximately 80 percent of the dissolved zinc load entering Willow Creek. Metals <br />~!-~bncentrations, flow rate, and load are remarkably consistent along Willow Creek. However, it would be <br />_.i <br />~~mistake to conclude from this that sources located along Willow Creek do not contribute to the metals <br />~' ;,~}ad. Rather, it is likely that the stream, bed sedimenu and widespread source material aze in equilibrium <br />~-~td metals concentrations are not fluctuating widely as a result. <br />Il Rio Grande River release samples exhibit elevated concentrations of zinc for aqueous (both total and <br />dissolved) and sediment samples. Although zinc concentrations decrease downstream from the Willow <br />Creek confluence, the TVS is still exceeded at the most distal sample in this study, collected 12 miles <br />downstream at Palisade campground. <br />6.0 REFERENCES <br />Colorado Depattment of Public Health and Environment, Hazardous Materials and Waste Management <br />Division, 1995A, Preliminary Assessment West Willow Creek and Windy Gulch. <br />Colorado Department of Public Health and Environmen[, Hazardous Materials and Waste Management <br />Division, 1995B, Preliminary Assessment East Willow Creek. <br />Colorado Department of Public Health and Environment, Hazardous Materials and Waste Management <br />Division, I995C, Combined Sampling and Analysis Plan for East and West Willow Creek. <br />15 <br />