The methods (dredging) they are using only guarantee that large amounts of the PCB contaminants will just be released into the river flow and will be freshly deposited downstream. Where they were, these contaminated sediments were encapsulated with decades of uncontaminated sediment. Now, the PCBs will be completely exposed to the water and aquatic life and will be re-contaminating everything for years to come. There must be a democrat involved.
See my rsponse to Vince Ferrer. It would have been much better to inject PCB digesting bugs directly into the location of PCB contamination. But that is too obvious, so the politician (Dumbocrat of course) as a rule picks a method that make it worse. Just like corn based ethanol. And when the situation does gets worse, well, IT’S BUSH’S FAULT! (standard liberal way out of anything)