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The payment is the latest move toward resolving hundreds of violations at the plant alleged by the federal Occupational Health and Safety Administration.
BP paid $50 million in 2010 to settle some of the OSHA violations. The government had been seeking a total of $80 million in penalties, the largest fine in its history.
Resolving the fines could help BP in its effort to sell the Texas City refinery, the sixth-largest in the nation.
Overall, the company has paid more than $2 billion to settle lawsuits and fines stemming from the 2005 explosion.
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