CANNON FALLS -- The Rochester Fire Department's chemical assessment team was called to a Cannon Falls business after the accidental mixing of two chemical lead to a "dramatic chemical reaction" that injured one person.

The chemical assessment team, which serves 11 counties in the region, was called about 5:15 p.m. Thursday to 103 Mensing Way in Cannon Falls. By the time the six RFD personnel and a battalion chief arrived to Gemini Signage facility, the injured employee was not on scene.

The employee did require medical attention. The extent f the person's injuries were unknown but they were not believed to be life-threatening.

RFD personnel entered the building wearing protective equipment.

"The team was unable to determine the exact product created by the mixing of the chemicals; however, they were able to determine there was no longer any risk of further reactions," a news release from the fire department read. "Due to the dispersal of chemical products during the reaction, the building was found to be contaminated with residual product, making re-occupying the building unsafe until a professional contractor could clean the area."

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The Cannon Falls Fire Department, as well as Cannon Falls Emergency Medical Service and the Minnesota State Fire Marshal's Office were also on scene.

Members of the Cannon Falls Fire Department use a hoseline to protect members of the Rochester Fire Department CAT as they make entry at the Gemini facility in Cannon Falls. (Rochester Fire Department photo)
Members of the Cannon Falls Fire Department use a hoseline to protect members of the Rochester Fire Department CAT as they make entry at the Gemini facility in Cannon Falls. (Rochester Fire Department photo)