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~~ . <br />AMERICAN ,/~ <br />SODA, ~I_P <br />2717 County Road 215 <br />Parachute, CO 81635 <br />Wednesday, July 26, 2006 <br />Erica Crosby <br />Colorado Department of Natural Resources <br />~; Division of Minerals and Geology/ <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: <br />Dear Erica: <br />I NO,rtV = <br />i•YV- <br />AF = rf / 6(0 ~~ <br />G~~ ~~- <br />Ed Cooley <br />Environmental Health and <br />Safety Manager <br />Direct Line (970) 285-0407 <br />International Telephone +1 (970) 285-6500 <br />General Facsimile (970) 285-6393 <br />ENV. 46.06 <br />RECEIVED <br />JUL 2 8 2006 ~~ <br />Division of Minerals and Geology <br />Technical Revision # 6 to Permit No.M-1999-002 Lam' <br />The two lined settling and evaporation ponds constructed in 1997 for Test Mine operations are no <br />longer a required component for future operations and reclamation of these ponds is now required, <br />American Soda L.L.P. is requesting a Technical Revision to the Division of Minerals and Geology, <br />Mined Land Reclamation Permit No. M-19999-002 to provide for the reclamation of the lined ponds <br />using the following procedures: <br />Remove and transfer approximately 5000 cubic yards of solid Nahcolite contained in the ponds to two <br />storage cells located on previously constructed pads at high point locations in the 0 to 5 year well field. <br />The storage cells will be constructed by excavating an elongated pit with 2 to 1 sloped sides on a cut <br />location that contains no fill. The pit will be lined with a Geosynthetie Clay Liner and a 40 mil Linear Low <br />Density Polyethylene geomembrane. A protective layer of screened soil will be placed over the <br />geomembrane to protect the liner during placement of the solids. No solids will be placed above the cut <br />and lined elevation of the cell. The cell will be covered with a cement cap. When cap is cured a <br />minimum of 3 feet of soil from the excavation will be placed over the cement cap and top soil currently <br />stock piled from the original construction of the pad will be redistributed. Piping and electrical systems <br />associated with the operation of the ponds as well as the pond pump house, bird netting, fencing and <br />the pond liners will be removed and disposed of off site. The ponds will be back filled and contoured to <br />original topography. All sites would be stabilized using suitable techniques (e.g., mulching or annual <br />vegetation) to prevent erosion until perennial vegetation has become established and reclamation is <br />complete. <br />Attached is well field map showing location of ponds, wells, roads and proposed sites for storage cells <br />and a copy of solids analysis. <br />Delivering a Crystal Clear Advantage <br />www.americansoda.com <br />