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Colorado Division of Reclamation, Mining & Safety <br />14 December 2006 <br />Page 4 of 4 <br />Also, oil and gas activities on the Plateau dictate that further reclamation at the Colony <br />site needs to be coordinated with these new activities. <br />Total land area contemplated for alternative land use is 228 acres. As these areas are <br />currently in their post-mining land use configuration, ExxonMobil requests removal of <br />these areas from the Permit. <br />Summary <br />ExxonMobil continues development activities to bring oil shale resources into <br />production. These activities include onsite research activities, probable use of the mine <br />bench for further activities designed to understand fracturing of the oil shale resource, <br />investigation into possible new crushing, conversion and upgrading technologies, on-site <br />spent shale research, and other possible activities utilizing the Colony facilities and <br />infrastructure. <br />The site is environmentally stable. Reclamation has been accomplished on <br />approximately 401 acres of a total disturbed acreage of approximately 1, 131 acres. <br />Approximately 228 acres of roads, terminal/staging area, and water resources facilities <br />will be used for future industrial activity and should be removed from the permit. Future <br />industrial use of these areas was contemplated in the approved permit. <br />Enclosed is a report detailing the reclamation work that has been accomplished and <br />explaining further our request to remove acreage from the Permit area because of future <br />industrial use for that acreage. <br />We trust that this submittal appropriately responds to the request set forth in the <br />Inspection Report. We will contact you after the holidays to schedule a meeting to <br />initiate the technical revision, review the enclosed report, and discuss additional <br />reclamation as well as the current status of the spent shale research. In the interim, <br />should you have any questions, please feel free to call me at (281) 654-6183. <br />Respectfully submitted, <br />Exxon Mobil Corporation <br />Ronald M. Smith <br />Colony Supervisor <br />Enclosures (2 copies each): <br />2006 Affected Area Status and Summary and Request for Reduction in Affected Acreage <br />Moisture Migration Report, ESR Reclamation Studies, Colony Oil Shale Project <br />