The poor weather conditions also didn't deter those who came out to show their support for Nolan.
A crowd of around 50 gathered at the memorial outside the refinery to see them off.
"The reason for this walk is to bring awareness to the process safety management code of practice,” Nolan said in a video he posted to Facebook Aug. 31.
He says the code of practice has not been followed, as it should.
In the video, Nolan says the union has brought safety concerns to government, but has not been getting the response they desire.
“Government needs to listen,” says Nolan.
The group expects to arrive at Confederation Building at 2:30 tomorrow afternoon.
