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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 30, 2011 <br />Mr. Bob Warneke <br />Natural Soda, Inc. <br />3200 RBC 31 <br />Rifle, CO 81650 <br />Re: <br />Dear Mr. Warneke: <br />In an effort to ensure that the financial warranty remains adequate to reclaim the site per the requirements of <br />the approved reclamation plan, the Division of Reclamation, Mining and Safety (DRMS) recently updated <br />the reclamation cost estimate and provided Natural Soda, Inc. a copy of the estimate on November 20, 2011. <br />On November 30, 2011 DRMS staff was provided an accurate list of the wells that exist at the site along <br />with specific dimensions regarding well diameters. Based on the recently provided information DRMS has <br />recalculated the cost to reclaim the wells and has determined that the currently held reclamation bond of <br />$1,942,504.00 is adequate at this time. A revised cost summary along with the cost for borehole plugging <br />and abandonment has been enclosed for your records. Due to the currently held reclamation bond being <br />accurate at this time the DRMS has withdrawn the surety increase requirement sent on November 23, 2011. <br />If you have any questions, please contact me at the Division of Reclamation Mining and Safety, Grand <br />Junction Field Office, 101 S. 3 Street, Suite 301, Grand Junction, Colorado, 81501, Telephone no. (970) <br />241 -2042. <br />Sincerely, <br />Travis H. Marshall <br />Environmental Protection Specialist <br />cc: Barbara Coria, DRMS <br />Steve Shuey, DRMS <br />Enclosure(s) <br />Office of <br />Minor) land Rorlamatinn <br />Revised Calculation <br />Paul Daggett <br />BLM — White River Field Office <br />220 East Market Street <br />Meeker, CO 81641 <br />STATE OF COLORADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAFETY <br />John W. Hickenlooper <br />Govemor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />Nahcolite Project, Permit No. M- 1983 -194, Financial Warranty Increase, Revision No. SI -2,V <br />DEC o ' 2011 <br />D ivisor, . <br />Minis y 'l,Laucn <br />an rafv!./ <br />Office of <br />Denver • Grand function • Durango Active and Inactive Mines <br />