Around 400 people were evacuated from a building on Roberts Boulevard in Kennesaw after a small chemical fire. Capt. Joseph Bryant of the Cobb County Fire Department said testing from the county’s hazmat team showed the building was safe to reenter. Three employees of CryoLife, a medical device company, were working with the chemicals when a reaction set off a small fire and the building’s sprinkler system. The sprinklers extinguished the fire before firefighters arrived at the scene. One of the three employees was taken to the hospital to be treated for smoke inhalation. Bryant said the fire was not as serious as the county’s response would suggest. As a precaution, firefighters were decontaminated as they left the building.