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both monitoring wells and production wells, care will be taken to evaluate the <br /> potential for any faults to exist in the area. <br /> Specific Comment No. 4: Each production well will be insulated by the fluid(gas <br /> or liquid) in the borehole which is used as the cap to direct dissolution of the <br /> mining horizon. Also, as the hot injected mining solution enters a cavity,the hot <br /> solution will mix rapidly with the cooler solution already in the cavity. <br /> Monitoring of cavity temperature will be done on the solution entering and exiting <br /> the production wells. The injection solution fluid temperature and volume will be <br /> adjusted to assure the cavity temperature does not exceed 300 degrees F. <br /> Specific Comment No. 5: The nahcolite-depleted decant(mining solution after <br /> nahcolite has been crystallized and removed) will be added back to the mining <br /> solution feed stream to be re-heated and re-injected. <br /> Specific Comment No. 6: Evaporation ponds are no longer part of the Project. <br /> Solids resulting from water evaporator will be disposed of in an approved landfill. <br /> Specific Comment No. 7: All chemicals used in the operation of the Project will <br /> be handled according to manufacturers' specifications. Any biocides used in the <br /> operation will be stored and used in quantities and following methods approved <br /> by the manufacturers and common in the industry. All necessary Material Safety <br /> Data Sheets(MSDS)will be properly maintained and available on site. The DMG <br /> will be provided a list of all biocides used in the operation, instructions for their <br /> use, and methods of disposal prior to operation. <br /> 15. Information on heat and sulfate resistant casing cement that will be used in well <br /> construction is included as Attachment 9 in this Technical Revision. <br /> 16. Cavity stability evaluations included the assumptions that fluid pressures inside the <br /> cavity exert a pressure equal to the weight of a column of water to the surface because the <br /> mining will be done in an unsaturated zone of low permeability/porosity such that fluid <br /> pressure is exerted at the cavity boundary. In addition, it should be noted that the mining <br /> solution will have a specific gravity of about 1.1 times that of water further increasing the <br /> stabilizing outward pressure on the cavity. <br /> 17. A revised Figure C-1 at a scale of 1"= 500' with the final Project facility <br /> configuration is included as Attachment 1. <br /> 18. The access road upgrade for the first approximately 200 feet from existing County <br /> Road 24 will be newly constructed. A revised permit boundary includes this road <br /> construction. An executed agreement giving AmerAlia the legal right to enter the lands <br /> for this segment of the access road is included as Attachment 10. <br /> 19. Proof that E. E. Kinder lease rights have been granted to AmerAlia is included as <br /> Attachment 11. <br /> 8 <br /> DMG 11-23-99 Response AmeriAlia,Inc. <br />