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Local

Toxic leak plume scenarios

A leak of highly toxic hydrogen fluoride at the refinery in St. Paul Park could endanger 1,400 to 1.7 million people, depending on the severity of the break or rupture.

By Mark Boswell

May 4, 2018 at 4:36PM

(Mark Boswell/The Minnesota Star Tribune)

about the writer

Mark Boswell

Deputy News Graphics Director

Mark Boswell is Deputy News Graphics Director at the Minnesota Star Tribune and has over 30 years experience as a visual journalist, illustrator and writer.