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Remediation Project Evaluation Scope, Methodology, Assumptions <br /> and Followup Recommendations <br /> 1. General Scope: <br /> Sunnyside Gold has performed a reconnaissance level study of <br /> the Upper Animas area to target potential remediation sites. <br /> In order to rate projects, simplifying assumptions were made <br /> for each category of project. These project categories are; <br /> a. Adit Flow Diversions from Dumps <br /> b. Portal Bulkheads or Constructed Wetlands <br /> C. Best Management Practice (BMP) Projects (i .e. cover or <br /> remove tailings and dumps to minimize contact with water) <br /> 2. Loading Evaluation Methodology and Assumptions: <br /> a. Adit Flow Diversions <br /> Methodology: <br /> - Water samples were taken at the portal and below the <br /> dump. <br /> - Analysis was for a combination of total and - <br /> dissolved metals. Except for one site, comparisons <br /> were made using the same type of analysis. <br /> - Water quality above and below the dump was compared <br /> for improvement or degradation. <br /> Assumptions: <br /> - Flow leaving the portal equaled the surface flow <br /> exiting the site. <br /> - Precipitate being deposited stays on or within the <br /> dump. <br /> - Loading from project(s) where degradation is <br /> occurring will be based on average flow from best <br /> available data. <br /> - Projects are feasible from an ownership and <br /> liability standpoint. <br /> b. Portal Bulkheads or Constructed Wetlands <br /> Methodology: <br /> - Sample data was collected from CDH Upper Animas <br /> Study and SGC sampling . <br /> - Average loading values were determined from <br /> available data. <br /> - A short list was made by eliminating any= sites with <br /> Zn concentration <BAT limits or ZN loading <4 <br /> lb/day. <br /> 5 - <br />