Asbestos dumped in western Sydney car park

Lucy Hughes Jones

A huge pile of building materials containing asbestos has been dumped outside businesses in Sydney's west.

About 20 tonnes of the dangerous rubbish was discovered after 8am on Monday in the car park of an industrial complex in Dunlop Street in Strathfield South.

NSW Fire and Rescue's Norman Buckley said 30 factory workers were not exposed to the potentially toxic material and overnight rain helped containment efforts.