Operations back to normal following an ammonia chemical leak at U.S. Foods.

Alcoa city officials ordered a shelter in place following the leak Friday night.

The City of Alcoa Fire Department along with a hazmat trailer were taking readings with meters in the area and they never got readings outside of the plant facilities. They say the road closure was a precaution and at no time was the public in danger.

A drone video showed a valve malfunction and after the valves were shut off, the shelter in place order was lifted.

When the liquid is released, it turns to vapor so no cleanup that has to be done, unlike an oil spill or gas fuel leak.

No injuries were reported.