The workers were not in one of Hanford's tank farms. They were working in the 200-West Area near the SY Tank Farm when they smelled a chemical odor. The workers reported throat and nasal irritation and headaches. As a precaution, WRPS management requested the workers receive a medical evaluation.
Air samples collected by industrial hygiene technicians are being analyzed. Further efforts will be made to determine the potential source of the vapors.