Four workers reported symptoms consistent with vapor exposure again Wednesday morning at the tank farm located at Hanford. There were a total of 6 workers that received medical treatment, but only 4 reported symptoms according to news reports. All the workers were released and returned to work after the evaluation but individual symptoms were kept secret because of medical privacy laws.

At the time of the possible exposure, they were not performing "waste-disturbing" work or moving waste from one tank to another. There is a greater chance of vapor exposure when they are "disturbing" or moving the waste from tank to tank according to sources.