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Implementation of the remediation at the IXURoyal Tiger site is expected to maintain <br /> current compliance with table-value standards for aquatic water quality in the reach of <br /> the Swan River adjacent to and downstream of the site. The remedy will complement <br /> other removal actions underway in drainages proximal to the Swan River(CDPHE, <br /> 2002). <br /> 9.5.2 lmplementability <br /> The equipment, expertise, and materials required to implement the remedy are readily <br /> available in the Summit County area. The site is easily accessed from Tiger Road. The <br /> ability to mobilize equipment and material to the site is unimpeded. <br /> 9.5.3 Compliance with ARARs <br /> Applicable or Relevant and Appropriate Requirements(ARARs)have been evaluated in <br /> CDPHE(2002),which is included as Attachment B to this application. This section <br /> summarizes that evaluation of ARARs for the IXURoyal Tiger site. <br /> Colorado Hazardous Waste Regulations, 6 CCR 1007-3 Part 261.4(b)(7)state that solid <br /> waste derived from the beneficiation, extraction, and processing of ores and minerals <br /> are exempt from classification as a hazardous waste. Those materials must still be <br /> handled as a solid waste (CDPHE, 2002). No waste repositories are being constructed <br /> on site to dispose of the waste rock or tailings materials. Since no repositories are being <br /> constructed and waste materials are not being moved from one disposal area to another, <br /> regulations governing the design and construction of solid-waste disposal facilities are <br /> not ARARs for this remediation. <br /> ARARs of significance include the Mined Lands Reclamation and storm-water <br /> requirements for mine sites (CDPHE, 2002). The proposed remediation will achieve the <br /> Mined Land Reclamation and storm-water ARARs for the site(CDPHE, 2002). <br /> State Historic Preservation Office(SHPO)considerations are not considered formal <br /> ARARs for the site. The only structure remaining on site that potentially dates back to <br /> the period of active operation at the site is an abandoned outhouse. Other structures at <br /> the site include abandoned shacks and other ad-hoc structures that post-date mining <br /> operations. These structures likely do not have any historic significance. The historic <br /> nature of the site will be preserved through the altered land forms,such as the waste- <br /> rock pile and dredge tailings that are a result of the area's mining heritage. <br /> 9.5.4 Long-term Effectiveness and Permanence <br /> In-place covering of the fine-grained tailings and stream-side tailings offers long-term <br /> protection of human health and the environment. in-place covering requires regrading <br /> and the placement of rock and vegetative covers that will require periodic inspection and <br /> maintenance(CDPHE, 2002). <br /> Construction of additional wetlands as well as the existing wetlands will provide long- <br /> term reductions in dissolved metals concentrations through natural-attenuation <br /> mechanisms. The constructed wetlands will require monitoring and maintenance to <br /> ensure that the vegetative communities are established. Once established, little <br /> maintenance should be required to ensure continued effectiveness. <br /> The re-routing of adit discharges into a lined channel will provide long-term reductions in <br /> erosion of the waste rock,as well as reductions in infiltration and saturation of the fine- <br /> IXURoyal Tiger VCUP-Application Page 28 of 33 <br />