A follow up now to a story we first brought you in the days following the explosion and fire at the Husky Energy refinery in Superior.
KBJR 6 obtained a sample of a charred substance found by a farmer on his land 10 miles south of the refinery.
We took that substance to Dr. Lorena Rios Mendoza, a Chemistry Professor at the University of Wisconsin Superior.
Following several tests, we learned Wednesday the sample we provided contains compounds similar to the foam used by firefighters during the blaze.
Mendoza said she dissolved the substance in two different solvents in order to analyze it.
The April 26th explosion injured 21 people.
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