An operation to drain about 34,000 litres of fuel from an overturned tanker on a busy intersection near Sydney airport is under way.

The petrol tanker flipped on a major road at Mascot in the city’s south just before 4am on Friday, spilling between 200 and 300 litres of fuel.

But Superintendent Paul Bailey of NSW Fire & Rescue said the remaining fuel must be drained out of the tanker so it can be put back in position safely.

This process is expected to take several hours and a foam blanket has been put down to stop any fumes from igniting.

“This will take a very long time, we’re looking at six to seven hours before we’re able to fully ensure that that container is safe,” he told reporters at the scene.

The 46-year-old male truck driver was not hurt in the crash.

Police say he returned a negative result in an alcohol breath test and that no other vehicle was involved in the incident.

“Preliminary investigations indicate at this stage that he’s just been going a little bit to quick,” NSW Police Acting Commander Scott Bingham told reporters.

The rollover has caused traffic chaos, with commuters in the area facing hour-long delays. Those travelling to the airport have been advised to take the train.

Extracted in full from Yahoo!