At least five people were hospitalized, including emergency responders, and 12 more people were treated when a vacuum truck carrying an organic peroxide exploded at a wastewater treatment plant on November 18.
Workers at the treatment plant as well as residents living between one to three miles away were told to shelter in place.
Both operators of the vacuum truck were inside the vehicle when the explosion occurred, and at least one of them was sent to the hospital. Three firefighters and and an ambulance worker were hospitalized after complaining of breathing trouble. A dozen hospital workers also were reportedly treated for respiratory issues.
A vacuum truck uses suction lines to collect solids liquids, sludge and other substances into a tank. These types of trucks are typically used for sewage or to empty septic tanks.