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s <br />• <br />MEMOFiANDUM ~DF UNDERSTANDING <br />Department of Heralth/HMWMD AND The Division of Minerals <br />October 1992 <br />Page 2 <br />the mill takes wa:~te or ore from only a single off-site source, the mill still requires a <br />CD. If <a mill ceases taking off-site wastes or ore, the mill may continue operations <br />under the CD, or may, at its option, apply for a Mined Land Reclamation Board permit <br />and abandon the CD. It will be up to DMG to notify Health of such action by an <br />operator. Notification to Health will be via the notice process required for all new <br />applications and modifications to permits. <br />3. HEAP LEACHING OPERATIONS. Facilities conducting heap leaching do not require <br />a CD, lout simply a Mined Land Reclamation Board permit. The DMG will incorporate <br />SWDFA. requirements into the MLRB permit based on comments received from Health <br />during I:he normal public comment period. Comments received from Health will be <br />handled according to established DMG policies and procedures. Those requirements <br />will be part of they MLRB permit and will be enforceable by DMG. <br />If a heap leach mining operation imports metallic waste materials from off-site, and the <br />facility is "processing, reclaiming, or recycling metallic...wastes.", such activities do not <br />trigger a CD requirement. If however, the heap leach mining operation also operates <br />a landfill, then a C,D is required. <br />4. MINE SITES LISED AS LANDFILLS AS A POST MINING LAND USE. If the mine site <br />landfill ;accepts off-site waste during the period of active operation and prior to bond <br />release, a CD is necessary. DMG will condition any new permit application or <br />modification to an existing permit such that landfill operations may not begin until a CD <br />has been obtainc;d. Also, where a mine site is to be used as a landfill as a post <br />mining land use, DMG will contact Health prior to bond release for comment. DMG <br />will not release the reclamation bond on such a site until an approved CD has been <br />issued by the appropriate authority. The condition for bond release will be made a <br />part of the permit approval document. <br />~~ ~~ - y~G'cxL~ate !~ ~ Z Date \ ~c ~`~, <br />David C. Shelton, Director Michael B. Long, Director <br />Colorado Department of Health Department of Natural Resources <br />Hazardous Materials and Division of <br />Waste Management Division ~ ^~ ~~`~\S ~' ~'~"~'~ <br />