Ship tests new ballast water treatment system over Lake Superior

September 8, 2011 at 3:00 am in Lake County News-Chronicle

Crews pumped a biocide into two of 10 ballast tanks in the Indiana Harbor as it left Gary, Ind., treating 1.8 million gallons of ballast water. The chemical then was neutralized with a second chemical as the boat moved across Lake Superior before releasing ballast in the Duluth-Superior harbor.
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