Gas leak stopped at Plymouth plant

Gas leak stopped at Plymouth plant »Play Video
PLYMOUTH, Wash. -- KEPR is continuing to follow the gas plant explosion that sent five people to the hospital Monday.

A leak is now stopped at the base of the tank that was ruptured. There is still vapor escaping from another hole.

It's not yet clear what cause the pipeline to explode in the first place, damaging the tank at the natural gas plant in southern Benton County.

It could take up to a month to complete the investigation.

"We want to do a thorough investigation, so we're doing very carefully a lot of fact-finding. We don't have any definite timelines. We will determine what happened, but it's going to take several weeks if not longer," said Williams Northwest Pipeline spokesperson Michele Swaner

The facility remains offline, and workers have not determined yet whether the inner wall of the tank was breached.