A FedEx facility in DeKalb County had to be evacuated early Thursday morning after a chemical spill, authorities said.

At around 7:30 a.m., firefighters were called to the facility off Thurman Road after an employee using a forklift came in contact with a container of organic peroxide, DeKalb fire spokesperson Capt. Jaeson Daniels told The Atlanta Journal-Constitution.

An estimated 300 to 500 gallons of fluid leaked into the facility, he said.

One employee was taken to the hospital with minor breathing issues, Daniels confirmed.