Firefighters have been called to a chemical spill at a wood panel factory in Wrexham, North Wales Fire and Rescue Service says.
A tanker caused the spillage at Kronospan Ltd on Holyhead Road, Chirk, at 10:06 BST on Thursday.
Kronospan is the UK's only fully integrated producer of wood-based panels.
The Environmental Protection Unit and and crews from Chirk, Llangollen, Wrexham and Deeside attended.
Firefighters were called to Kronospan, which employs 600 people, last October following a blaze in two storage areas.
There were also were three fires at the factory in June and July last year.