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1985'Y2 SOUTH BROADWAY <br /> DAUB & ASSOCIATES, GRAND JUNCTION, CO 81507-9649 <br /> / (970)254-1224 <br /> FAX(970)242-8438 <br /> email: gjdaub@daubandassociates.com <br /> www.daubandassociates.com <br /> August 5, 2016 <br /> Mr. Kent Walter <br /> Bureau of Land Management <br /> 220 East Market Street <br /> Meeker, CO 81641 <br /> Re: Natural Soda, LLC (NS) Subsequent Notice of Conversion of DS-4 <br /> Groundwater Monitor Well to BG-8 (DS-4)(10H-C)B-Groove Aquifer Monitor <br /> Well. <br /> Dear Mr. Walter: <br /> NS successfully converted the DS-4 Dissolution Aquifer Monitoring well, located <br /> on NS leases COC-0119987, to a B-groove Aquifer Monitoring Well. It is now <br /> known as the BG-8 (DS-4)(10H-C). The conversion was accomplished by placing <br /> a cement plug from --1,832 to 1651.5 feet BGL, a bentonite plug at 1,651.5 to <br /> 1,640.5 feet BGL, then perforating the steel casing from 1,640 to 1,600 feet BGL. <br /> Attached: <br /> • BLM form 3160-5 <br /> • Conversion Summary Report <br /> • Well Completion Diagram <br /> Should you have any questions or comments, please contact me at (970) 254- <br /> 1224, or Kirk Daehling at (888) 464-7632 ext. 114. <br /> Regards, <br /> Gerald J. Daub, P.G., C.P.G. <br /> President <br /> Daub & Associates, Inc. <br /> Cc: Kirk Daehling <br /> Plant Manager <br /> Natural Soda, LLC <br /> Travis Marshall <br /> CO DRMS <br /> SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL,GEOTECHNICAL AND PERMITTING SERVICES <br />