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The Phosphogypsum Stack System layer contains the approximate boundaries of the phosphogypsum stacks in the state and the associated conveyances and process water impoundments that form a phosphogypsum stack system as defined in Chapter 62-673.200, F.A.C. Phosphogypsum stacks are formed as a means to store the phosphogypsum and associated process water resulting from the chemical manufacturing of phosphoric acid and related fertilizer products. Phosphogypsum itself is calcium sulfate (gypsum) that is formed as a by product from the chemical reaction of sulfuric acid with phosphate rock in the production of phosphoric acid. For more information on phosphate and phosphogypsum stacks, please see the information provided by the Florida Institute of Phosphate Research at http://www1.fipr.state.fl.us/PhosphatePrimer. Phosphogypsum stacks are located in four counties in Florida including Polk, Hillsborough, Manatee, and Hamilton counties. This layer was designed to provide the Bureau of Mining and Mineral Regulation and other interested parties with a graphical representation of the phosphogypsum stack systems and their relative locations in the state. This layer represents the best attempt of the Bureau to gather and verify the data but they are not error free. The layer is maintained by the Bureau of Mining and Mineral Regulation in the Division of Water Resource Management at the Florida Department of Environmental Protection. |