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Exhibit A <br /> Water Treatment Chemicals— 1011-22 <br /> Estimated <br /> Yearly Usage Chemical Vendor Unit Price <br /> 1500 tons Alum USAlco $ 421.32/ton <br /> 450 tons Carbon—900 MeadWestvaco $1400.00/ton <br /> 350 tons Carbon—550 Thatcher Co. of Montana $1018.00/ton <br /> 475 tons Carbon Dioxide Praxair, Inc. $ 57.49/ton <br /> 120 tons Chlorine JCI Jones Chemical, Inc.. $ 341.00/ton <br /> 225 tons Hydrofluosilicic Acid Pennco, Inc. $ 609.25/ton <br /> 5500 tons Lime Mississippi Lime $ 134.50/ton <br /> 350 tons Sodium Chloride Hickman, Williams & Co. $ 182.85/ton <br /> 300 tons Sodium Chlorite Siemens Water Tech. $ 852.00/ton <br /> 35 tons Sodium Hexametaphosphate Carus Corporation $2060.00/ton <br />