Workers at a Hixson firm began complaining of exposure to chemicals on Wednesday morning and 24 were eventually taken to the hospital to be checked out.
A Haz-Mat team was sent to Southern Filter Media, which is on Kanasita Drive near Greenway Farm.
The site was cleared around noon.
The exposure was from fumes from a plant manufacturing process, it was stated. The company makes filter bags.
Several employees felt more sick than others from the fumes, it was stated.