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(Ford, 1996)for varying recreational uses of the property. Source materials evaluated <br /> include waste rock, tailings,and add discharges. <br /> Primary recreational uses are expected to be hiking and mountain-biking along <br /> established trails that will pass through the site. Other uses could include all-terrain <br /> vehicle (ATV) travel and to a lesser degree camping. Designated camp sites are not <br /> expected to be established within the IXURoyal Tiger site. However,it is possible that <br /> incidental camping use could occur as part of the overall recreational nature of the <br /> proposed land use. <br /> Concentrations of lead and arsenic in the waste-rock samples exceed the RMC <br /> benchmarks for AN drivers. Concentrations of arsenic,cadmium,and lead in waste- <br /> rock samples exceed the RMC benchmarks for camping as well(CDPHE, 2002). <br /> Concentrations of lead and arsenic in samples from the exposed fine-grained tailings at <br /> the base of the former mill area exceed the RMC benchmarks for camping and ATV <br /> drivers (CDPHE, 2002). <br /> Concentrations of lead in the sample collected from the stream-side tailings are slightly <br /> above the RMC benchmark for camping and ATV drivers (1,400 mg/kg compared to a <br /> benchmark value of 1,000 mg/kg for both uses). <br /> Concentrations of cadmium in the adit discharge are greater than the Maximum <br /> Contaminant Level for drinking water promulgated under the Colorado Primary Drinking- <br /> water Regulations(CDPHE,2002; CDPHE-WQCD, 1999). However,no use of this <br /> water source for residential,potable water is contemplated. Metal concentrations in the <br /> adit discharge, including cadmium, are below the RMC benchmarks for camping use <br /> (CDPHE, 2002). <br /> 9. REMEDIATION PLAN <br /> This section presents a work plan for remediation of the IXURoyal Tiger site. The work <br /> plan is designed to address the environmental impacts and site risks identified during the <br /> site assessment and streamlined risk evaluation. <br /> 9.1 Objectives <br /> i <br /> The objectives of the voluntary clean-up for the IXURoyal Tiger site include: <br /> 1. Minimize the environmental impacts of materials eroding from waste rock and <br /> tailings; <br /> 2. Reduce the amount of metals entering the aquatic environment; <br /> 3. Erect a barrier to minimize human contact with materials exhibiting elevated <br /> metals concentrations; <br /> 4. Maintain existing compliance with applicable water-quality standards in the Swan <br /> River downstream of the site;and <br /> 5. Preserve the historic nature of the mining areas consistent with planned future <br /> recreational land uses. <br /> These objectives are consistent with those outlined in CDPHE(2002). <br /> IXURoyal Tger%W lP Application y Page 22 of 33 <br />