More than 300 dust explosions have killed more than 120 works in grain silos, sugar plants and food processing plants over the past three decades. Most are preventable by removing fine-grain dust as it builds up, experts say.
The U.S. Chemical Safety Board concluded in a special report in 2006 that OSHA had no comprehensive regulation to prevent these explosions and their program "inadequately addresses dust explosion hazards."
The board recommended OSHA issue a comprehensive industrial standard for combustible dust.
OSHA did not issue a comprehensive industrial standard for combustible dust, as the board recommended. It did institute a national program under which sites would be inspected for various issues including combustible dust to make sure they complied with federal regulations, OSHA spokesman Mike Wald said.
The Port Wentworth site had not been inspected as part of that new program, Wald said. He said the last OSHA inspection of the facility was in June 2000, in response to an unspecified complaint, with no violations found.
per:
http://www.startribune.com/nation/15437131.html