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Ava Kofman: Boeing reported to the EPA that it had ramped up the amount of chromium compounds it was pumping into the skies of eastern Portland, Oregon, in 2016. In 2016, Boeing’s Portland plant told the EPA it had released 1,954 pounds of hexavalent chromium into the air — a 1,000% increase from the year before. In 2017, that amount soared to 5,556 pounds, where it hovered for the next two years.