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1985%: SOUTH BROADWAY <br /> DAUB & ASSOCIATES, GRAND JUNCTION,CO 81507-9649 <br /> ,' (970)254-1224 <br /> FAX(970)242-8438 <br /> 9 email: gjdaub@daubandassociates.com <br /> � ® www.daubandassociates.com <br /> March 10, 2023 <br /> Mr. Bill Mills <br /> Bureau of Land Management <br /> 220 East Market Street pN1StU�t 0 <br /> Meeker, CO 81641 <br /> Re: Natural Soda LLC (NS)Well Sundry Notice for the Plugging and Abandonment of the <br /> 3M-TDR Subsurface Subsidence Monitor Well <br /> Dear Mr. Mills: <br /> Natural Soda LLC (NS) plugged and abandoned the 3M-TDR subsurface subsidence monitor <br /> well starting in December 2022, and final plug and abandonment occurred in March 2023. The <br /> well was cemented to surface, cut off below grade, a steel cap with the well name was welded <br /> onto the conductor casing, and the well was then buried. Reclamation of the surface location <br /> will proceed as soon as conditions permit in 2023. <br /> Attached please find the following for the 3M-TDR: <br /> • BLM 3160-5 form <br /> • Plug and Abandonment Diagram <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 (970) 456-1268. <br /> Regards, <br /> "'�-4�1 <br /> oc�- <br /> Gerald J. Daub P.G., C.P.G. <br /> President <br /> Daub &Associates, Inc. <br /> Cc: Kirk Daehling <br /> Business Director <br /> Natural Soda LLC <br /> Amy Yeldell (w/encl) <br /> Colorado Division of Reclamation, Mining and Safety <br /> Don Breffle (email --w/o encl) <br /> US EPA UIC Region VIII <br /> File <br /> SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL, GEOTECHNICAL AND PERMITTING SERVICES <br />