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1985 Y2 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 12, 2017 J 'Ql RF-CE PIED <br /> Mr. Kent Walter J <br /> Bureau of Land Management `nn •� JUN 1 ,Q <br /> 220 East Market Street V ` 2017 <br /> Meeker, CO 81641 DIVISION OF REC�MATIpN <br /> MINING&SAFETY <br /> Re: Natural Soda, LLC (NS) Notice of Abandonment— BG-8 (DS-4, 101-1-C), MMC-IRI-2, <br /> and MMC-IRI-10 Groundwater Monitor Wells. <br /> Dear Mr. Walter: <br /> NS plugged and abandoned the BG-8 (DS-4, 101-1-C), MMC-IRI-2, and MMC-IRI-10 <br /> groundwater monitor wells in May 2017. <br /> The BLM had requested that a cement bond log (CBL) be run in the BG-8 after the recompletion <br /> plugback cement was drilled down to a depth below the B-Groove Aquifer, for final subsurface <br /> subsidence monitoring and to ensure adequate zonal isolation. The CBL (see attached) <br /> indicated good zonal isolation above, below, and between the A-Groove and B-Groove Aquifers. <br /> These three monitor wells were successfully plugged and abandoned. Each well was filled to <br /> the surface with cement within the casing and the annulus. The wells were cut, capped, and <br /> buried approximately 4 feet below the ground surface. The well pads are planned to be <br /> reseeded using the BLM approved final reclamation seed mix during the autumn of 2017. <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:BG-8, MMC-IRI-2, and MMC-IRI-10 <br /> • Plug and Abandonment Diagrams for wells: BG-8, MMC-IRI-2, and MMC-IRI-10 <br /> • BG-8 CBL (513117) <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 />