On September 9, 2005, Employees #1 and #2 were replacing a sump pump on a premium gasoline pump at a BP Gas station. The pump, powered by a 220 volt line, was in a sump that was used to contain fuel residue. After the installation of the new pump, it was tested and failed to operate. While Employee #1 was checking the pump voltage with a volt/ohm meter, he became distracted and allowed a meter lead to short to ground. The resultant spark ignited fuel vapors in the bottom of the sump and caused a flash fire. Employee #1 sustained first-degree burns to his hands and face. Employee #2 was hospitalized first-degree burns to his face.
Source: osha.gov
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