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1985'/2 SOUTH BROADWAY <br />DAUB & ASSOCIATES, INC. I�__ GRAND JUNCTION, CO 81507-9649 <br />" _"°,,. (970) 254-1224 <br />,}&� Wy �� G'� .� FAX (970) 242-8438 <br />email: gjdaub@daubandassociates.com <br />www.daubandassociates.com <br />June 2, 2015 <br />Division of Reclamation, Mining and Safety <br />Attn: Minerals Division <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: IResponse to: Nahcolite Project, Permit No. M-1983-194 Notice of Receipt <br />Technical Revision No. 37L Completeness Notification and Request for <br />9% *1 ration Cost Estimate. <br />Natural Soda LLC (NS) responds to the DRMS correspondence dated May 13, <br />2015: <br />• The estimated cost to plug and abandon (P&A) the 15H, 16H, and 17H well <br />pairs is: $210,000 (6 wells at $35,000 each). Please note that the EPA <br />currently holds bonding amounts to cover the costs of all injection well P&A. <br />• The estimated cost to reclaim the increased disturbance associated with the <br />15/16/17 pad and access roads (5.1 acres) is: $61,000 <br />• The estimated volume of overburden (well pad) is 13,153 cubic yards. <br />• The estimated volume of topsoil (road and well pad) is 3,407 cubic yards. <br />Should you have any questions or comments, please contact me at (970) 254-1224 <br />or (970) 216-1010 (c), or Kirk Daehling at (888) 464-7632 ext. 14. <br />Regards, <br />Gerald J. Daub, PG, CPG <br />President <br />Daub & Associates, Inc. <br />Cc: Kirk Daehling <br />Plant Manager <br />Natural Soda LLC <br />Paul Daggett <br />Bureau of Land Management (WRFO) <br />✓ AF & Report <br />✓ No Violations <br />Travis Marshall <br />Colorado Division of Reclamation, Mining and Safety <br />Grand Junction Office (email) <br />File <br />SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL, GEOTECHNICAL AND PERMITTING SERVICES <br />