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NATURAL SODA <br /> ;r AN ENIRGI GROUP COMPANY <br /> June 25, 2015 <br /> Ms. Barbara Coria <br /> Financial Assurance Specialist RECEIVED <br /> Colorado Division of Reclamation, Mining and Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 JUN 3 0 2015 <br /> Division of Reclamation, <br /> Mr. Travis Marshall Min;:;. 4 Beaty <br /> Environmental Protection Specialist <br /> Colorado Division of Reclamation, Mining and Safety <br /> Grand Junction Field Office <br /> 101 South 3rd, Suite 301 <br /> Grand Junction, CO 81501 <br /> Re: Natural Soda, Inc.—Change of Name to Natural Soda LLC, a <br /> Delaware limited liability company <br /> Nahcolite Project—Permit No. M-1983-194 <br /> Rock School Lease Experimental Nahcolite Mine—Permit No. M-1999-051 <br /> Dear Ms. Coria and Mr. Marshall: <br /> I am writing to you with respect to the change of name of Natural Soda, Inc. to <br /> Natural Soda LLC. In particular, I am writing with respect to the provisions of Hard <br /> Rock, Metal, And Designated Mining Operations Rule 6.3.12, which provides, in part, that <br /> the"Applicant shall provide information sufficient to demonstrate that the stability of any <br /> structures located within two hundred (200) feet of the operation or affected land will not <br /> be adversely affected." <br /> I have a degree in Chemical Engineering, and I have worked on the Nahcolite <br /> Project and Rock School Lease Experimental Nahcolite Mine, and their associated <br /> facilities, (collectively"Nahcolite Mine") at various times for over twenty years. More <br /> recently, I have worked on the Nahcolite Mine for the last nine years. During the time that <br /> I have worked on the Nahcolite Mine I have been involved in all aspects of the mining <br /> operations and have extensively investigated the geology associated with the Nahcolite <br /> Mine. <br /> As part of the mining operations at the Nahcolite Mine, there are extensive <br /> monitoring operations and studies with respect to surface and sub-surface subsidence and <br /> NATURAL SODA 3200 County Road 31 Rifle,Colorado 81650 ph:970-878-3674 fx:970-878-5866 www.naturalsoda.com <br /> ,' egrgl <br />