Star Tribune Tue, 01 Apr 2008 02:57:17 GMT
Cleaning up river site may cost 3M $18 million
The plan calls for 3M to dredge river and pump out water contaminated with PFCs at its Cottage Grove plant. Cleaning up dangerous chemicals in the Mississippi River and at the 3M Co. plant in Cottage Grove will be more costly, complicated and time-consuming than cleaning up other contaminated areas in the east metro, according to a plan filed recently with the state. It will include dredging of the river to remove highly contaminated sediment in a cove and sandbar, 3M officials said, and will cost $12.5 to $18 million. The cleanup also includes excavating soil at the chemical plant where wastes were buried years ago, and pumping out millions of gallons of polluted groundwater that flows into the Mississippi.
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