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Wood Products Industries (WPI) Inc., is proud to announce that it will use an alternative preservative, ACZA, to pressure treat crossties and switches of both hardwood and softwood species at its South River, ON, facility. Wood Products Industries specializes in industrial products. Production is scheduled to start the week of May 12, 2013. Wood Products Industries (WPI) Inc.'s ACZA-treated crossties will be sold under the Chemonite® brand name.