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4.3.5 Lease or Nfine Plan Modification <br />In 1993, a request was submitted to the BLM for a lease modification. If approved, a <br />520 acre window would ibe added to a contiguous lease and an equal (approximately) <br />amount of acreage would be relinquished. An economic evaluation of this lease <br />modification was in process at year's end, and a decision was expected by early 1995 <br />regarding cost for lease modification. <br />The following changes in the Mine Plan were addressed in 1994: <br />1. Inject and recovery from single well (91-2H). <br />2. Revised Comprehensive Monitoring Plan toadd/subtract some water quality <br />parameters. <br />• 3. Updated Section 7, Volume 5 of the Mine Plan to include Centrifuge, <br />screening, :silos, bagging, palletizing and new warehouse area. Also plant <br />modification for production of food grade (USP) material. <br />4. Updated Suction 6, Volume 5 of the Mine Plan to include cavity #4 with <br />production ~roells 4-1 V, 4-2V and 4-3H. A Right of Way was required for <br />portion of 4-3Hnff-lease. At year-end, approval was received from the State <br />DMG, but not the EPA and BLM. <br />. 1 <br />