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<br />Comprehensive Analytical Results Report <br />Fast and West Willow Creek <br />5.3.3 East Willow Creek (SW/5E-17 through SWISS-26) <br />Metals concentrations in surface water and sediment samples are generally lower in East Willow <br />Creek than in West Willow Creek and Willow Creek. East Willow Creek does not exhibit elevated <br />metals concentrations above SW/5E-21 near the Ridge Mine. From SW/5E-21 through SE/SE-26, <br />aqueous and sediment samples exhibit elevated lead and zinc levels. Sediment samples are also <br />elevated with respect to arsenic, cadmium, and copper as depicted in Table 4. Dissolved <br />concentrations of lead and zinc exceed TVSs for SW-21 through SW-26. These standards are <br />hardness dependent but are less than .5 µg/1 for lead and less than 30 µg/1 for zinc. <br />Loading analyses reveal that the dissolved zinc load increases from 4.07 ppd to 13.89 ppd between <br />~T..~~ SW-21 and SW-22. These samples are located upstream and downstream, respectively, of the <br />~ Solomon Adit. The Solomon Adit is cazrying 10.04 ppd (before treatment) dissolved zinc. <br />'1 <br />_ ~ '_ _7 Although the Solomon Adit discharge is being captured and treated in a series of three ponds <br />•-~ comprising the PMDTS, the outflow from the PMDTS is not accessible for sampling, so the <br />~'-_ <br />`... - <br />~~ ;~ effectiveness of the PMDTS could not be directly determined. Samples collected from the three <br />~'~ ponds do not show a significant reduction in metals ctincentratiotu (page 6, Table 2), therefore, <br />~_'=~ a portion of the increase in zinc load in East Willow Creek may be attributable to the Solomon <br />SW-26 exhibits the highest concentration of dissolved lead (18.50 µg/1) of all surface water <br />samples. The City of Creede recently closed their drinking water intake located near SW-26. <br />5.3.4 Willow Creek (SW/5E-27 through SW/SE-34) <br />Willow Creek exhibits elevated concentrations for all surface water samples for the dissolved and <br />total fractions for cadmium, lead, manganese, and zinc. Background comparison for this analysis <br />was made with SW-Ol and SW-17. All sediment samples are also elevated for these analytes as <br />well as for arsenic, copper, and silver. Loading analyses reveal that West Willow Creek <br />contributes approximately 80 percent of the dissolved zinc load entering Willow Creek as <br />summarized below; <br />ocat' <br />West Willow SW-10 <br />Dissolved Load Pounds per Dad <br />185.75 <br />East Willow SW-26 <br />44.37 <br />Willow Creek SW-27 265.69 <br />11 <br />