Part of Link Dr was closed as fire crews wearing level four gas suits inspected the chemical drums in the building after a small blaze in a processing room.
Crews were called to the single-storey structure after an alarm activation at 4.40pm. This was followed by a 111 call saying there was a smell of burning in the area.
"Upon arrival we did identify there was a potential fire in the premise and we made a second alarm fire," a Fire and Emergency NZ spokesperson said.
Crews from Rolleston, Wigram, Lincoln, Spreydon, Dunsandel, Christchurch City and Woolston were called to the scene.