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data appeaz to be anomalous and will advise them that care should be exercised in reviewing these data. The notice sheet will specifically indicate that interpretation of data from well 20-1 is problematic and that the assessment of Lower Aquifer water qualih~ based on these data should be done ~~ith caution. The draft monitoring plan and the notice sheet will be provided to the EPA and the Colorado Division of Minerals and Geology (CDMG) prior to issuance of their respective commercial permits, and documentation of these actions will be provided to RBC. American Soda is committed to working with RBC and the other agencies to cooperatively address their concerns in the ~~roundwater monitoring program American Soda has retained the services of Bishop-Brogden Associates, [nc., a water resources consultant specializing in groundwater, to assist in the development of the final monitoring plan. :~merican Suda will include monitoring provisions for the Piceance Creek Alluvial Aquifer and local springs, as determined through consultation with the various agencies. Specific locations, numbers, and sampling frequencies of these svstems will be determined as part of the final monitoring plan. American Soda intends that the final monitoring program will be a dynamic and flexible plan that may be altered based on the results of future data collection and in cooperation with the permitting agencies. :'lfter the monitoring program is implemented, American Soda will produce annual data reports and provide the reports to the agencies. American Soda will periodically provide analytical results to RBC and other agencies on a timely basis throughout the year or upon request. American Suda is committed to protecting groundwater quality in the Piceance Creek Basin. As we have discussed with RBC end other agencies, American Suda will take appropriate and effective measures to protect groundwater quality including the following. • [ffective well completions to isolate aquifer tivstems, including the use of tubing inside properly cemented casing, lugging to evaluate the adequacy of well completions, and mechanical integrity testing of wells prtor to operation. • Operational monitoring of the pressure and flow in and out of wells to evaluate potential leakage and detect well faiiur~•s. Isolatiuii of the solution minim; cavity is required for the mining process to work. If pressure cannot be maintained on a well, the well cannot be mined. • Establishment of a roof zone above each cavtty to further isolate the mining horizon from the aquifer svstems. TIZe roof zone will be approximately 150 feet thick. • Completion ut a final ;;roundwater monitoring plan that is both economically feasible and technically viable. T11e inonituring plan well include the proper collection Water t>ual,ty 1-Z R,o Blanco l.,unnr Add~mrol INOnninOn Raqu~a~ Piceance Mimnq Upemm~ Amencan Soda. I.LP.