OLIN <OLN>, DU PONT <DD> COMPLETE PLANT Olin Corp said construction was completed on a 150 mln dlrs chlor/alkali plant it owns jointly with EI du Pont de Nemours Co. The company said the plant, which is located in Niagara Falls, New York, will begin operations in December. The plant, which has a 660-ton per day capacity, will be operated by du Pont, the company said.