Thousands of people could have been exposed to asbestos from an Alphington road construction site.
Work on the $110m Chandler Highway upgrade was halted this week after the discovery of asbestos in soil on the worksite.
The recent discovery of asbestos-contaminated soil has also stalled demolition work at a nearby paper mill and the construction of a residential tower.
A statement from the CFMEU claims workers, local residents and passing motorists could have been exposed to the asbestos contaminated soil, which has been exposed in the more lethal friable form.
Melbourne has also experienced a number of days of strong winds.