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EXHIBIT A <br /> Estimated <br /> Annual Usaqe Chemical Low Bidder Unit Price <br /> 200-250 tons Alum General Chemical $129 . 71/ton <br /> 120-150 tons Carbon Acticarb $584 . 00/ton <br /> 700-800 tons Carbon Dioxide Liquid Carbonic $ 39 . 50/ton <br /> 115-125 tons Chlorine Rowell Chemical Co. $255 . 00/ton <br /> 150-175 tons Hydrofluosilicic Alexander Chemical $138 . 50/ton <br /> Acid 23$ <br /> 7000-8000 tons Lime Mississippi Lime $ 59 . 00/ton <br /> 3000-5000 gal . Polymer , bulk Cytec Industries $ . 335/lb <br /> 1000-2000 gal . Polymer , DR Citi-Chem, Inc . $ . 424/lb <br /> 0-7 tons Potassium <br /> Permanganate ( 110 lb) Browning Chemical $ 1 . 16/lb <br /> 10-20 tons Potassium <br /> Permanganate ( 330 lb) Carus Chemical $ 1 . 192/lb <br /> 60-80 tons Sodium Chlorite Rio Linda Chemical $ . 344/lb <br /> 30-40 tons Sodium Browning Chemical $ 51 . 00/cwt <br /> Hexametaphosphate <br /> 22 tons Sodium P.B . & S Chemical $ 23 . 40/cwt <br /> Silicofluoride <br /> cc: Beth Couter <br />