Six more workers reported symptoms related to chemical vapors from Hanford's SY Tank Farm on Monday.
That brings the total workers undergoing medical evaluation for tank vapor exposure to 25. All have been cleared to return to work, including the six workers with symptoms Monday.
Washington Gov. Jay Inslee said at a news conference about Hanford issues that he was concerned about the Department of Energy system that gives DOE responsibility for enforcing worker safety at its projects. He plans to bring up the issue with the state's federal delegation, he said.
He has not been fully briefed on the tank vapor issue, but said anytime state residents working on a federal project have trouble breathing, he is concerned.
The six workers who developed symptoms Monday were near the group of tanks called the SY Tank Farms. They reported throat and nasal irritation and headaches and were sent to Hanford's medical provider for evaluation as a precaution, according to contractor Washington River Protection Solutions.
Industrial hygiene technicians collected air samples, which are being analyzed. The contractor is making further efforts to determine the potential source of the vapors, it said.