Transocean Challenges Chemical Agency's Authority to Probe BP Gulf Blast

A federal panel that investigated the fatal 2005 Texas refinery blast that resulted in a $50 million fine for BP Plc hasn’t got the authority to probe the company’s April deep-water drilling disaster, according to rig owner Transocean Ltd.
Under federal law, floating rigs are exempt from oversight by the U.S. Chemical Safety and Hazard Investigation Board, Rachel G. Clingman, an attorney for Transocean, said in a letter to the agency obtained by Bloomberg. 
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Source: Bloomberg