A mechanical failure of a refrigeration unit apparently caused a carbon dioxide leak at the Aidi Food Market in Batavia this afternoon.

The leak led to the evacuation of every business in the structure, from the Job Bureau on the east to the Five Star Bank on the west.

Chief Stefano Napolitano did not have an estimated time for when the buildings can be reoccupied. Firefighters are using fans for ventilation, or "positive pressure" to push air through the buildings, as the chief put it, to reduce the amount of carbon dioxide in the air. The goal is to get it down to 400 parts per million, which is a satisfactory ambiant level, the chief said.