Hazmat crews in protective clothing are working to contain a chemical spill after three drums of hydrochloric acid fell off the back of a truck in Sydney’s west.

James Ruse Drive was closed in both directions near the M4 at Rosehill as the acid began to eat away at the surface of the road.

Fire and Rescue Superintendent Adam Dewberry told Ben Fordham there’s an exclusion zone set up.

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Image: Getty