State Police Fire Marshal Greg Agosti says the explosion and resulting fire started in the filter house, which was significantly damaged. A smaller building was destroyed and five other buildings on the property now have moderate structural damage.
One employee was hurt in the explosion. He was treated for his injuries and then released. No emergency responders were hurt.
A team of five state police fire marshals and four agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives in Pittsburgh completed the investigation and say there are no suspicious circumstances. Agosti adds that there is not a threat to the environment or area surrounding the facility as a result of the incident.