Hospital officials say a patient walked into the ER at Emerson Hospital around 5 p.m. Saturday with medical complaints and an unidentified white powdery substance.
Hospital officials secured the area and diverted new patients to other facilities. At least five people were put through a decontamination process.
After hours of testing, the substance was identified as road salt, which can cause burning to the skin. The ER was reopened around 9 p.m.