A minor oil spill from Shell's Clyde refinery in Sydney's west has been contained and poses no risk to local residents, Fire and Rescue NSW says.
An unknown amount of the petrol-based substance ran into Duck Creek around 4pm (AEDT) on Wednesday, after heavy rain caused the refinery's stormwater system to overflow.
Containment booms were put in place and the area was diluted with fresh water and detergent.
A Fire and Rescue NSW spokesman said a Hazmat (Hazardous Material) team and workers from Sydney Ports helped Shell contain the spill overnight.
The oil did not cause any damage and posed no risk to residents, he said.
A Shell spokesman confirmed on Thursday that the oil had been cleaned up.
'It's under control... there's no situation,' he told AAP.
The Environment Protection Authority (EPA) has been informed.
