Authorities are on the scene of a large two-alarm fire and hazmat situation in Quincy, Massachusetts.
Thick smoke poured once again from the Nut Island Wastewater Treatment Plant in Quincy, after a fire there rekindled.
Firefighters faced a dangerous battle, flames underground in blackness, about 7 stories or 100 feet down.
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Electricity had to be cut to the building.
However, the situation at 147 Sea Ave., the site of Nut Island Headworks, a sewage screening facility, is contained.
A "scrubber" caught fire due to a malfunction, according to Quincy Police. There are chemicals within the "scrubber."
Five male workers were down below doing what the Mass Water Resources Authority calls routine maintenance on a machine that eliminates odor from waste, when a fan ramped up, possibly causing the explosion, and subsequent fire.
All five people have been transported to Boston Medical Center for smoke inhalation and eye irritation.
Now waste from all over the area, is being bypassed from Nut Island to the Deer Island Treatment Plant in Boston.
Officials say residents were never in any danger, and say there's no environmental impact.
The exact cause is still under investigation, and the State Fire Marshal's Office is also on scene.