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Investigators believe accidental release of chemicals caused fatal fire at BP-Husky

TOLEDO, Ohio (WTVG) — The U.S. Chemical Safety and Hazard Investigation Board (CSB) said Monday that an accidental release of flammable chemicals ignited, creating a fire that fatally injured two employees in September.

The CSB examines the valves and interconnected piping associated with the refinery fuel gas mixing drum located in Crude Unit 1.

The fuel gas mixing drum was installed circa 2016 and combines various sources of flammable gases for use as fuel in refinery furnaces and boilers. CSB investigators are focusing on a release of flammable naphtha from the fuel gas mixing drum, based on information from various sources at the refinery.

Access to the area surrounding the fuel gas mixing drum is currently restricted due to the presence of asbestos fibres.

The CSB investigation team conducts interviews with witnesses and employees, documents the scene of the incident, collects equipment and equipment components, obtains documents and evaluates recorded process data. The CSB team has already interviewed over 80 people and plans to interview 20-30 more.

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