OSHA requirements on returning collected grain dust

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

March 13, 1978
Mr. Jay Hennigh
[Recipient address omitted]
Dear Mr. Hennigh:
This is in response to your letter regarding grain elevator explosions. We appreciate receiving comments and recommendations on this subject. Please accept my apology for the delay in response.
I, too, am deeply concerned about the recent grain elevator explosions and fires which have caused high loss of life and property. Although our investigations of these catastrophes are not yet completed, I am hopeful the causes can be determined and remedial solutions be initiated as quickly as possible.
As the present time, the Occupational Safety and Health Administration has no regulation that requires grain dust to be trapped and returned to the grain. The Environmental Protection Agency does have regulations which limit the amount of grain dust that can be emitted into the atmosphere.
A Technical Exploration Meeting was convened by OSHA on December 30, 1977, to investigate whether or not OSHA and/or EPA regulations contributed to the recent explosions. Those present were in agreement that the dust collecting and controlling elements of grain elevators were not the critical issues. The disposition of the dust after collection, however, requires careful evaluation.
For your information, enclosed is a copy of the Grain Elevator Industry Hazard Alert booklet that we have sent out to the industry.
If I may be of any further assistance, please feel free to contact me.
Sincerely,
Eula Bingham
Assistant Secretary
Occupational Safety and Health
Enclosure