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l� <br /> 1985 Y SOUTH BROADWAY <br /> DAUB & ASSOCIATES, INC. GRAND JUNCTION,CO 81507-9649 <br /> (970)254-1224 <br /> FAX(970)242-8438 <br /> email: gjdaub@daubandassociates.com <br /> www.daubandassociates.com <br /> June 16, 2017 L(�� RECEIVED <br /> Mr. Kent Walter L � JUN 212017 <br /> L 1 <br /> Bureau of Land Management <br /> 220 East Market Street DIVISION OF R$AFETAFEATIgy <br /> MINING S <br /> Meeker, CO 81641 <br /> Re: Natural Soda LLC (NS) Notice of Abandonment— 11 H-I, 11 H-R, and 71-1-21, 7H-1 R, <br /> 71-1-1V Production and Recovery Wells. <br /> Dear Mr. Walter: <br /> NS successfully plugged and abandoned the 11 H-1 and 71-1-21 production wells, and the 11 H-R, <br /> 71-1-1 R, 71-1-1 V recovery wells in May 2017. <br /> Cast iron bridge plugs (CIBPs) were set in each well, the casings were perforated as needed, <br /> and the wells were filled to the surface with cement within the casing and the annulus. CIBP <br /> depths, perforation depths, and cementing details are provided on the included plug and <br /> abandonment diagrams and sundry notices. The wells were cut at the surface and abandoned <br /> hole markers were welded onto the well casings. <br /> Should you have any questions or comments, please contact me at (970) 254-1224 or <br /> (970) 216-1010 (c), 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 /> Enclosed: <br /> • BLM forms 3160-5 for wells: 11 H-1, 11 H-R, and 7H-21, 7H-1 R, and 7H-1 V <br /> • Plug and Abandonment Diagrams for wells: 11 H-1, 11 H-R, and 7H-21, 7H-1 R, and 7H-1 V <br /> Cc: Kirk Daehling <br /> General Manager, Operations <br /> Natural Soda LLC <br /> Travis Marshall w/o encl. <br /> CO DRMS <br /> File <br /> SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL, GEOTECHNICAL AND PERMITTING SERVICES <br />