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• • <br />Please refer to Attachment4 — Monitoring Plans in the Responses to DMG Comments <br />letter of November 23, 1999, for the measures to be taken to prevent any unauthorized <br />releases to the environment. <br />(6)(b)(i) Sodium bicarbonate will be mined from the Saline Zone of the Green River <br />Formation using solution mining (production) wells as described in Exhibit D — Mining <br />Plan in the Application. The mining solution will be conveyed between the production <br />wells and the processing plant in insulated metal pipes. The production wells and <br />pipeline will be monitored for any leaks as described in the Process Monitoring and <br />Containment Plan submitted in the Responses to DMG Comments letter of November 23, <br />1999. Sodium bicarbonate will be removed from the mining solution in the process plant <br />shown in figures C-4.1 and 4.2 submitted as confidential in the Application. The process <br />plant is designed with a concrete floor and curbing, sumps, and tank to contain spilled <br />solution. The curbed plant floor and the holding tank are each designed to contain the <br />volume of the largest vessel inside the plant where the mining solution is processed. <br />Should a spill occur, the spilled solution would be pumped from the curbed plant floor to <br />the holding tank. The dried sodium bicarbonate will be placed in protective hoppers or <br />silos until shipped by truck. Best management practices will be used during production, <br />handling, and storage of the dried sodium bicarbonate to prevent contact with <br />precipitation. <br />During periods of temporary cessation, no mining will occur, and no solutions will exist <br />above ground. Any processed sodium bicarbonate will be shipped, contained in the <br />process plant, or disposed of in an approved landfill. <br />(6)(b)(ii) The containment facilities will be monitored as described in the Process <br />Monitoring and Containment Plan submitted with the Responses to DMG Comments <br />letter of November 23, 1999 for any leaks or spills. Leaks or spills are anticipated to be <br />very small and will be contained in areas from which topsoil had previously been <br />salvaged prior to construction. Because of the construction design and operating <br />parameters of the Project, no topsoil is expected to be contaminated by sodium <br />bicarbonate. Replacing the salvaged and protected topsoil upon Project termination will <br />insure that the land will be returned to the approved post- mining land use. <br />(6)(b)(iii) No adverse off -site impacts are anticipated. The Project will be operated and <br />monitored following the design parameters and operating conditions submitted by <br />AmerAlia in the Application, the Responses to DMG Comments letter of November 23, <br />1999, and this EPP as well as all other applicable regulations and approvals of other <br />agencies. <br />(7) Facilities Evaluation <br />(7)(a) The environmental protection facilities are: production wells, production well field <br />pipeline, production well field drainage pond, and the process plant. Each of these <br />facilities has been described in the Application, and additional information has been <br />provided to the DMG for certain of those facilities, as requested, in the Responses to <br />DMG Comments letter of November 23, 1999. Each facility has been, or will be, <br />November 23, 1999 <br />3 AmerAlia, Inc. <br />