Static charge caused explosion in Woburn Tuesday - Woburn, MA - Woburn Advocate Woburn, MA — An explosion Tuesday that critically injured a worker in East Woburn was caused by an electrical charge that triggered a dust explosion, State Fire Marshal Stephen D. Coan, Woburn Interim Director of Fire and Emergency Services Robert DiPoli, and Woburn Police Chief Robert Ferullo, Jr. said in a joint statement released today. An employee was using an improperly grounded vacuum to clean machinery when a build-up of static charge inside the vacuum ignited the dust, causing an explosion and subsequent small fire, officials said. One man was critically injured and airlifted to a Boston hospital by MedFlight shortly after the first emergency call came in at 12:27 p.m. on Tuesday, Nov. 5. A worker from a neighboring company attempting to help the man suffered minor injuries, and a police officer was also treated as a precaution. Powderpart uses metal powders and a 3-D printin...