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1 " <br /> 1985 Y.,SOUTH BROADWAY <br /> �� GRAND JUNCTION, CO 81507-9649 <br /> DAUB 8 ASSOCIATES, INC. ' (970)254-1224 <br /> FAX(970)242-8438 <br /> Email: gjdaub@daubandassociates.com <br /> www.daubandassociates.com <br /> May 11, 2017 R EIVED <br /> Ms. Wendy Cheung // 9 201 <br /> US EPA Region VIII <br /> Mail Code: 8P-W-GW OMSiC`. �F RECLAMA-r <br /> 1595 Wynkoop Street MINiNG AND SAFETY <br /> Denver, CO 80202-1129 <br /> d <br /> Re: Application to add solution mining injection well 12H-IR to UIC Area Permit <br /> C030358-00000 <br /> Dear Ms. Cheung: <br /> Natural Soda LLC (NS) hereby submits an application for the proposed injection/recovery well <br /> 12H-IR. This well will be drilled in late 2017 or early 2018. The 12H-IR will intersect the current <br /> 12H mining interval from the west and utilize the existing 12H-R well for brine recovery. NS will <br /> also retain the ability to inject from the existing 121-1-1 well and use the 121-1-IR as a recovery well <br /> as sodium bicarbonate production dictates. A 9.625" diameter intermediate casing will be <br /> installed in order to facilitate recovery pump installation when necessary. The preexisting NS <br /> DS-3 ground water monitor well will be utilized as the subsurface subsidence monitor well <br /> (SSMW) for the 12H-IR well. The DS-3 penetrates the R-6 confining interval and is proximal to <br /> the planned well bore path. <br /> Please find attached: <br /> • Aerial and topographic maps indicating proposed SSMW location and the mile the Area of <br /> Review (AOR) <br /> • Completed 7520-6 form <br /> • Completed 7520-14 form <br /> • Comprehensive list of the AOR Wells <br /> • Well completion diagrams for the proposed injection and recovery well <br /> • Well Plug and Abandonment diagram <br /> Well completion information and diagrams for all existing wells in the AOR remain unchanged <br /> and have been previously submitted to the EPA on multiple occasions. All wells in the AOR <br /> have been properly sealed, completed, or plugged and abandoned. NS would appreciate any <br /> efforts to expedite the approval process for this Class III solution mining well. <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 x114. Thank you. <br /> Regards, <br /> Gerald J. Daub PG, CPG <br /> President <br /> Daub & Associates, Inc. <br /> SPECIALIZING IN PROFESSIONAL GEOLOGICAL, ENVIRONMENTAL, HYDROLOGICAL; GEOTECHNICAL AND PERMITTING SERVICES <br />