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;?n ss?STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />November 212010 <br />Mr. Tom L. Adams <br />Exxon Mobil Corporation <br />D n B 2567 <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Ritter, Jr. <br />Ter q'" C',? Governor <br />James B. Martin <br />Executive Director <br />n ! ) tJ i kJ <br />??`-`?° Loretta E. Pineda <br />OX [3?ytg„Ofl Ui tz.??.?;T, tr311, Director <br />Houston, TX 77252-2567 *19 3o'd ' a`I <br />Re: Colony Shale Oil Project, Permit No. M-1980-047, echnical Revision Approval, Revision No. TR-13V <br />Dear Mr. Adams: <br />On November 2, 2010 the Division of Reclamation, Mining and Safety approved the Technical Revision application <br />submitted to the Division on September 28, 2010, addressing the following: <br />• Technical Revision to install four B-Groove Aquifer hydrology monitoring wells and installation of four <br />to eight horizontal water draining wells immediately below the A-Groove Aquifer. <br />The terms of the Technical Revision No. 13 approved by the Division are hereby incorporated into Permit No. M-1980- <br />047. All other conditions and requirements of Permit No. M-1980-047 remain in full force and effect. <br />The currently held $30,000,000.00 performance bond is adequate at this time. <br />If you have any questions, please contact me at (970) 241-2042. <br />Sincerely, <br />Travis H. Marshall <br />Environmental Protection Specialist <br />cc: Steve Shuey, DRMS <br />Mark Del Pico, ExxonMobil (via e-mail) <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines