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/~_~~Q~-oc~z <br />A IU! E R I C A ly ~ Todd Wilson <br />(~ ~ ~ L ~ ~ Plant Manager <br />2717 County Road 215 International Telephone +1 (970) 285-6500 <br />Parachute, CO 81635 Toll Free Customer Service (866) 4 BICARB <br />General Facsimile (970) 285-6393 <br />Tuesday, January 29, 2008 <br />Ms. Erica Crosby <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Dear Ms. Crosby: <br />ENV007.08 <br />RECEIVED <br />FEB 01 2008 <br />Divlslo~ ~ u rceaa~~r~ation, <br />Mining and Safety <br />Enclosed are two copies of American Soda's 29th Quarterly Report in compliance with <br />Hard Rock Mining Operation Permit No. M- - ne copy o t e document is not <br />bound. These documents include environmental ground water monitoring data collected <br />and compiled during our twenty-ninth quarter of operations (December 2007). No solution <br />mining activity occurred during the report period. <br />The ground water data summary report is spiral bound as anon-confidential document and <br />includes a comparison of the 29th operational quarter with baseline and operational <br />general statistics prior to the current reporting period. In addition, the tables provide <br />information for comparison of Ground Water Standards as provided in Regulation No. 41 <br />and Numeric Protective Levels and Early Warning Indicators as amended in TR-4. <br />Comparison of the data values with the Early Warning Indicators (EWI) and the Numeric <br />Protective Levels (NPL) indicates two values above the calculated EWI limits during the <br />sample period. No values flagged above NPL during the period. The December 2007 <br />value for dissolved potassium recorded from the sample collected at the alluvial well 28-1 <br />is 6 mg/L. The calculated EWI for this constituent at this point is 5.21 mg/L. The value for <br />dissolved sodium at upper aquifer well 29-3 is recorded at 10,500 mg/L in December 2007. <br />The calculated EWI at this point is 10,096 mg/L. This information is discussed in more <br />detail and graphs of the period of record for both of these constituents for these wells are <br />shown in the Executive Summary of the report on pages 2 and 3, respectively. <br />Should you have any questions or comments regarding this information, please contact me <br />at (970) 285-0428 or Celina Akin at (970) 285-0406. <br />Sincerely, <br />~- <br />~,~,-~~, <br />Delivering a Crystal Clear Advantage <br />www.americansoda.com <br />