A third fire has broken out at a Lancashire site in the space of two months.
Firefighters have been tackling the blaze at the former V10 Polymers building in Paterson Street, Blackburn.
The fire is under control but local residents are advised to shut windows as a precaution, Lancashire Fire said.
Plastic waste was on fire but there was no asbestos on site following its removal after the September incident, a spokesperson said.
The cause of the blaze is yet to be confirmed.