Cleanup efforts ongoing at former Alcoa smelter
Dec 29, 2008 | 11:36 AM
| Tom Jennemann
Alcoa Inc. has begun dredging contaminated sediment from the Columbia River and has removed more than 5,000 cubic yards of high-level polychlorinated biphenyl (PCB)-contaminated sediment from a site adjacent to a former aluminum smelter in....
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