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Two temporary workers hired to cut and weld pipes at the Omega Protein plant in Moss Point, MS, had no idea and had no training to know the storage tank beneath them contained explosive methane and hydrogen sulfide gases, said Occupational Safety and Health Administration (OSHA) officials.

One of the two men found out later as he lay in a hospital with a fractured skull, internal injuries and broken bones. The second, Jerry Taylor, 25, died when the tank exploded July 28.

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OSHA investigated the incident and has found four companies violated safety regulations that could have prevented the tragedy. The companies are Accu-Fab & Construction Inc., Omega Protein, and JP Williams Machine & Fabrication, all in Moss Point, and Global Employment, in Pascagoula.

Proposed penalties for the four companies are $187,620.

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Accu-Fab, a metal fabricator, was under contract by Omega Protein to manufacture and erect a wastewater storage tank that required modification of existing pipes. A staffing agency, Global Employment Services, provided Accu-Fab with the employees needed at Omega. JP Williams Machine, which provides industrial service and repair, was on-site the day of the explosion performing unrelated maintenance activities.

“The Omega Protein plant explosion shines a spotlight on how critical it is for employers to verify, isolate and remove fire and explosion hazards in employee work areas,” said Eugene Stewart, OSHA’s area director in Jackson. “If the employer ensured a safe environment, this tragic incident could have been prevented.”

OSHA issued 13 citations to Omega Protein, a producer of omega-3 fish oil and specialty fish meal products, for willful, repeated and serious safety violations. OSHA issued a willful citation for exposing employees to fire and explosion hazards due to Omega management’s failure to inform Accu-Fab the storage tank contained wastewater that could generate hydrogen sulfide and methane gases, which can be highly explosive and toxic, even at low concentrations. The repeated violations involve not having standard railings on open-sided floors and platforms and failing to label electrical boxes properly.

Omega Protein faced previous citations for these same violations in 2012. Additionally, the serious hazards included allowing workers to weld and cut piping on an improperly prepared storage tank containing explosive methane and hydrogen sulfide gases and failing to label or tag the storage tank to note it contained hazardous chemicals.

OSHA cited Accu-Fab for one willful, four serious and two other-than-serious violations. The willful violation was for failure to train workers on chemical hazards in the work area, such as hydrogen sulfide, methane, welding gas and paints. Global Employment Services received a serious citation for this same hazard. Additionally, both employers ended up cited for a serious violation for failure to instruct employees about avoiding unsafe work conditions. Accu-Fab also received a citation for failure to ensure employees working on top of a storage tank at heights of up to 29 feet were wearing fall protection and for not recording this fatality or two other recordable injuries.

JP Williams ended up with one serious citation for improperly storing oxygen and acetylene cylinders. Exposure to acetylene can cause headache, dizziness, asphyxiation and even frostbite.

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