Archive Notice - OSHA Archive

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at

March 16, 1978

Mr. Dominque Gignoux, President
Industrial Gauging and Control, Inc.
8605 Grovemont Circle
Post Office Box 485
Gaithersburg, Maryland 20760

Dear Mr. Gignoux:

This is in response to your letter regarding grain elevator explosions. Please accept my apology for the delay in response.

We appreciate your comments on electrostatic discharge in grain storage silos as being a possible cause of fires and explosions. Our technical staff is collecting and evaluating all possible data on this subject, in order to find solutions and effective means of controlling conditions that are causing fires and explosions in the grain elevator industry.

At present, we are conducting detailed and thorough investigations of the recent grain elevator explosions. At the conclusion of these investigations, we will share our findings, facts and other information obtained with the industry and other interested parties. You may be assured that when the final report is completed, a copy will be forwarded to you.

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.


Eula Bingham
Assistant Secretary
Occupational Safety and Health