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~ iiiiiiiiiiiiiiiim ~_ 999 January 5, 1994 Mr. Gregg R. Squire, Reclamation Specialist Division of Minerals and Geology 1313 Sherman St., Roorr- 215 Denver, Colorado 80203 RE: WRNM Nahcolite Project Permit No. M-83-194 Technical Revisior- Request Dear Mr. Squire: ~~-00 Per our phone conversation today, White River Nahcolite Minerals (WRNM) hereby submits a Technical Revision to Pennit No. M-83-194. The first request is for approval for an additional monitoring well (26-94-1M) over planned cavity #3. The purpose of the new well would be for sonar survey/subsidence monitoring over an injection point. The maximum effect of solution mining should be at an injection point. The BLM has requested the monitoring well be in operation prior to Honing cavity #3. In order to drill the monitoring well during time frame when production wells are drilled, and save mobilization costs ($10,000-20,000), please approval this request as soon as possible. Total disturbed acreage is 47 acres of the pennitted 73 acres. The new monitoring well (26-94-1 M) of 300'. X 300', plus access road of 24' X 210' would increase disturbed acreage by 2.2 acres for a total of 49.2 acres. The new well (26-94-1M) would be located 500' north of cavity #3 production well (26- 93-3V) as illustrated on attached map titled "Site Plan for 1994". Again, this request is within permitted disturbed acreage of 73 acres. The second request is for approval to drill cavity #3 up to 2000' in length. A Technical Revision approved March 22, 1993 by the CMLR Board, approved drilling/mining cavities #.? and 3 up to 1500' in length. As a result of the success of drilling cavity #2 (a total of 1500'), WRNM requests approval to drill cavity #3 up to 2000' in length. If halite (which limits nahcolite mining) is present in the additional length (2000' or less), only the portion without halite will be mined. This additional drilling length of cavity #3 will help identify northern boundary of nahcolite/halite interface, and increase resource recovery without increased surface disturbance.