An investigation is under way after a suspected arson attack on a recycling centre.
Up to 35 firefighters were called to the unit in Casterbridge Trading Estate in London Road, Dorchester, at about 1900 GMT on Sunday.
Crews said the fire was made worse due to a large amount paper inside the unit and there was some "minimal" concern over asbestos.
Environmental protection officers were also called to assess the scene.
Phil Head, from Dorset Fire and Rescue Service, said the cause of the fire was believed to be deliberate.
"This was a very intense fire due to the large amount of organic combustible material in the unit," he added.
"There is an amount of asbestos in the building itself but this would have largely been absorbed into the air and of minimal hazardous concern to people."