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1985'/2 SOUTH BROADWAY <br />DAUB &ASSOCIATES, INC. GRAND JUNCTION, CO 81507-9649 <br />r}�,. (970) 254-1224 <br />f i , 1,` �f�t� ~ `fit i' �. FAX (970) 242-8438 <br />email: gjdaub@daubandassociates.com <br />www.daubandassociates.com <br />May 27, 2015 <br />I/ Division of Reclamation, Mining and Safety <br />Attn: Minerals Division '40032015 <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 WASION OF 9MMATION <br />MINING SAFETY <br />Re: Natural Soda LLC Nahcolite Project Permit No. M-1983-194 Technical Revision <br />(TR) No. 38, Addition of a Brine Filtration Unit and Removal of Two Cooling <br />Towers. <br />Natural Soda LLC (NS) intends to install a brine filtration unit in 2015. The unit will be <br />aF:iJlUlCils'lciiCiy 3c.0 i"_) c .� kv I x ::.U`�: 3 ! ;rJ!! DS ucja .'n to t"e existing dant tacllity <br />within the current plant footprint (see attached location map). The unit will be constructed <br />on a concrete slab foundation, and will include three filters, a smaller pump, and 500 gallon <br />settling tank. <br />NS also plans to remove two old cooling towers that have been decommissioned. The <br />related retention structure and pump foundations will also be removed. The footprint of the <br />two cooling towers and associated structures is approximately 34.0'(L) by 32.0'(W). <br />Reclamation costs associated with the removal of the two cooling towers are anticipated to <br />total approximately $50,000. <br />Please find attached: <br />1) Location Map of Proposed Brine Filtration Unit and Cooling Towers <br />2) Check #,d ?f ($1,006) TR filing fee <br />Should you have any questions or comments, please contact me at (970) 254-1224 or <br />(91-0) 216-1010 1 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 />Kent Walter <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 <br />File <br />SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL, GEOTECHNICAL AND PERMITTING SERVICES <br />