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solution mining of sodium bicazbonate at the Piceance Facility have been carried out on a commercial scale since 2000 under conditions of the Permit, and American Soda has gained considerable operating and monitoring experience during this time. Based on that experience and proposed changes in the operating plans for the Project, American Soda has requested several modifications to the UIC permit. American Soda, in consultation with EPA, the Bureau of Land Management (BLM) and the Colorado Division of Mines and Geology (CDMG), developed an approach to the proposed modification acceptable to the regulating agencies and to American Soda. The request for the modifications to the Permit included three elements: 1. UIC Permit Modification Request that provided suggested language for the various sections to be modified including a new Section of requirements for periods of Temporary Suspension of mining operations; 2. Revised Subsidence Plan, dated August 2004, to replace the original Subsidence Plan and to include modifications to the requirements for Time Domain Reflectometry (TDR); and 3. Revised Ground Water, Surface Water, and Process Monitoring Plan dated September 2004, that includes reduction of the number of monitoring pazameters. PUBLIC COMMENTS Public comments aze encouraged and will be accepted, in writing, at the Denver Office for a period of thirty (30) days after publication of this notice. If any member of the public desires a public hearing on this draft permit, the request should be in writing, and should state the nature of the issues proposed to be raised at the hearing. A public hearing will be held only if significant interest is shown. All data submitted by the applicant, as well as the draft Major Modification to the Permit and the draft Addendum to the Statement of Basis prepazed by EPA, aze contained in the administrative record. This information is available for public inspection at the following location from 9:00 a.m. to 4:00 p.m., or by contacting the following office: U.S. Environmental Protection Agency Region 8 Ground Water Program, 8P-W-GW 999 18th Street, Suite 300 Denver, Colorado 80202-2466 (Telephone 1-800-227-8917 Ext.61551 FINAL PERMIT MODIFICATION DECISION AND APPEAL PROCESS After the close of the public comment period, EPA will issue a final Permit Modification decision, and will notify all commenters regazding this decision. The final decision may be to: issue; deny; modify; or revoke and reissue the draft Permit Modification. The final decision shall become effective thirty (30) days after the final decision is issued, unless no commenters