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~'ED~"'v°. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY <br />REGION 8 <br />~ 99918T" STREET -SUITE 300 <br />DENVER, CO 80202-2466 <br />http://www.e pa.gov/regi o n08 <br />MAY 92001 <br />Ref: 8P-W-GW <br />CERTIFIED MAIL <br />RETURN RECEIPT REQUESTED <br />Sp}~ecialist: ESC <br />//Permit #: M1999002 <br />Class: G~'a-Q ~'S <br />~m: ryP~} <br />~oc. Name: ^~(,~,~ <br />]Yale: $,9-dal <br />Confidential?: ~(~ <br />Type/Seq.: <br />To: /IYy~P,rtCpw'~ ~Q <br />„y, ~o~trccfian wePls <br />Mr. Kur[ R. Nielsen <br />General Manager <br />American Soda, L.L.P. <br />2717 County Road 215 <br />Pazachute, Colorado 81635 <br />Dear Mr. Nielsen: <br />Re: UNDERGROUND INJECTION CONTROL (iJIC) <br />Class III Solution Mining Well-Potential <br />Modification of Plant Capacity <br />EPA Area Permit C03858-00000 <br />Rio Blanco County, Colorado <br />This letter responds to American Soda's recent inquiry regazding the potential need for a <br />UIC Permit modification should the Yankee Gulch Plant be changed to provide increased capacity <br />for product output. It was our understanding during our Apri14, 2001, meeting that any <br />modification of plant capacity would coincide with an increase in the number of operating cavities <br />at any given time. Further, any increase in output would not involve a modification in the present <br />wellfield design or drilling pattern. Instead, American Soda would increase the number of wells <br />drilled per year following the existing wellfield design laid out in the mine plan. The surface <br />pumping plant would be modified as needed, within the existing plant disturbed azea, to provide <br />the necessary processing and pumping capacity. This proposed expansion would require <br />submittal of a proposal to the various regulatory agencies (probably in the fall of 2001) for any <br />necessary modifications. It is our understanding, based on discussions with the Bureau of Land <br />Management (BLM), that a modification of the mine plan would be necessary to make changes to <br />increase capacity. Depending on the scope of the proposed changes, the BLM will have to carry <br />out either an environmental analysis (EA) or a supplemental environmental impact statement <br />(EIS). <br />As you are awaze, the Yankee Gulch Area Permit is based (as stated in the Permit) on the <br />representations made in the application. These representations included a yeazly rate of drilling <br />about 15 wells per year. The potential changes may double the number of caverns in use at any <br />one time. <br />~Pdn[ed on Recycled Paper <br />