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AMERICAN ~d~ <br />S O D A, L L P Todd Wilson <br />Plant Manager <br />2717 County Road 215 <br />Parachute, CO 81635 <br /> <br />International Telephone +1 (970) 285-6500 <br />Toll Free Customer Service (866) 4 BICARB <br />General Facsimile (970) 285-6393 <br />Monday, January 29, 2007 JAN 3 0 2001 ENV006.07 <br />Division of neGamation, <br />Mining and Safety <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 />Enclosed are two copies of American Soda's 25th Quarterly Report in compliance with <br />Hard Rock Mining Operation Permit No. M-99-002. One copy of the document is not <br />bound. This document includes environmental ground water monitoring data collected and <br />compiled during our twenty-fifth quarter of operations (December 2006). 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 25th 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 />Analysis of the data collected in the fourth quarter 2006 shows one data point for dissolved <br />boron elevated above the numeric protective level at the 21-3 Uinta monitoring well. The <br />sample collected in December 2006 indicates a value for dissolved boron of 4.1 mg/L. The <br />calculated NPL for this constituent at this sampling point is 3.64 mg/L. The baseline mean <br />value for dissolved boron is 3.25 mg/L and the operational mean is 2.89 mg/L. The <br />maximum value observed in the baseline monitoring phase prior to solution mining was 7.0 <br />mg/L. No other constituents flagged above the NPL at this well or any other sampling <br />point during the quarter. Observations of dissolved boron at well 21-3U will continue on a <br />quarterly frequency. Data for dissolved boron at well 21-3U during the period of record is <br />represented in the graph on the following page. <br />Delivering a Crystal Clear Advantage <br />www.americansoda.com <br />