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Colorado Ui~lch Ii'etlanc~s Beach Test <br />Tech»~cal ~1len~oranc~rin~ <br />Executive Summary <br />Colorado Mountain College Natural Resource Management in conjunction ~~~ith Trout Unlimited is <br />conducting a sulfate reducing bioreactor bench test to detei7nine the best ~z etland receipt for removal <br />of pollutants from Colorado Gulch «ater. The results of this test ~~i11 be used to determine the best <br />treatment design that «i11 be implemented in an artificial ~~ etland near the mouth of Colorado Gulch, <br />a tributan~ to the Lake Fork. The purpose of this project is to determine «~hich of four substrate <br />recipes, designed b~- James Gusek (Golder Associates, Inc.), could efficiently- remove metals from <br />Colorado Gulch ~~ aters near Leadville, CO. <br />The bioreactor cells used for this project will be constructed on the Colorado Mountain College <br />campus, and the ingredients used to create the tested substrates «ill be gathered from Leadville, CO, <br />or the sui7ounding area. The cells are designed to be fed b~- a peristtaltic pump and monitored dai1~-; <br />four ~~ ater quality- parameters - pH, specific conductance, Redoi, and temperature -will be taken. <br />In addition to parameters tal~en «=ith the dai1~- s~unples, ~tieekl~- samples of Mineral Acidit<-, Total <br />Metals, Sulfate. and Dissolved Metals, were collected from each cell and the holdnig tank. The <br />weel~h samples collected will be sent to ACZ Anal~-tical Laboratories Inc., ili Steamboat Springs, CO <br />for analysis. <br />Final results of this test ~~-i11 be sent Linda Figueroa of Colorado School Mines as part of the design <br />for the wetland treatment complex. The most cost effective and efficient recipe will be selected for <br />use in the anticipated constructed ~~-etlands remediation plan in Colorado Gulch. <br />4 CMC NRM <br />