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TABLE 4 <br /> CALCULATIONS FOR WOOD TREATING CHEMICAL REMOVAL <br /> FROM STORM WATER <br /> Maximum Concentrations of Wood Treating Chemicals <br /> Chromium (Hexavalent) , mg/1. 1.50 <br /> Chromium (Total) , mg/1. 16. 10 <br /> Copper, mg/1 0.05 <br /> Arsenic, mg/l 0.01 <br /> Anion Run to Breakthrough <br /> Anion Resin Volume, cu ft = 246 <br /> Specific Capacity for Cr(+6) , lb/cu ft = 1.5 <br /> Total Capacity for Cr(+6) , lb = 369 <br /> Throughput to Breakthrough, gal = 29,480,916 <br /> Cation Run to Breakthrough <br /> Cation Resin Volume, cu ft = 123 <br /> Specific Capacity for Cations, lb/cu ft = 3.9 <br /> Total Capacity for Cations, lb = 480 <br /> Throughput to Breakthrough, gal = 3,924,081 <br /> Cation resin capacity controls system throughput for and storm water. <br /> 7 <br />