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Executive Summar <br />American Soda, L.L.P. is submitting this 42nd Quarterly Ground Water <br />Monitoring Report in compliance with E.P.A. U. I. C. Area Permit C03858-00000 <br />Final Modification No. 9 (March 31, 2005), MLRB Hard Rock Mining Operation <br />Permit No. M-99-002 (Technical Revision No. 4), and U. S. B. L. M. Sodium <br />Lease Nos. C-0118328 and C-0118329 Record of Decision. The data presented <br />in this document represents the time period from January 1, 2011 through March <br />31, 2011. The Piceance processing plant and well field were in temporary <br />suspension of production operations status and no solution mining activity <br />occurred during the report period. <br />The hydrologic monitoring program for the current reporting period at the Yankee <br />Gulch Sodium Minerals Project includes monitoring of eight key metals and 14 <br />wet chemistry constituents from 22 sampling locations including five separate <br />water bearing zones. Sampling points are positioned up gradient, down <br />gradient, cross gradient, and in-panel in relation to the mining activity. <br />Recording of water elevations and field parameters is completed in conjunction <br />with collection of the water quality samples from each well. As a result of the <br />high solids content of the dissolution aquifer, sampling is only reliably successful <br />at one dissolution sample point. The completion of this well (21-3D) is in the <br />upper portion of the dissolution aquifer where dissolved solids are somewhat less <br />concentrated. Water levels in all three dissolution surface monitoring wells are <br />being manually measured and recorded on a quarterly basis. One down stream <br />private domestic ground water well (BURKE) is also sampled quarterly. <br />Before American Soda commenced mining operations in 2000, fifteen months of <br />baseline ground water data was collected. The current quarter monitoring data <br />for each well is summarized in a one page table per well in this document. Not <br />only is the raw data for the present reporting period included, but also regulatory <br />standards and statistics are shown for comparison and, additionally, baseline and