Enbridge wants to replace Line 3, which was built in the 1960s.
Was at SunTrust Park to install his patented beer-pouring technology when he died.
Company says it was acting legally at the time, will pay the fine in15 days, no admission of liability.
Wide-reaching implications if the state succeeds, in part because 3M and other companies legally dumped the chemicals for years.
Company believes PFCs present no harm at the levels they are observed in Minnesota.
Blast occurred in paint shop; sheriff says the scene is safe.