Occupational (OSHA) and Environmental Hazards/flamable storage building ventilation


At our facility we have a flammable storage building that is set up per 1926.152 (b)(4)(vi) with a mechanical system setup for 6 air exchanges per hour. The fan switch is located on the outside of the entry door w/pilot lights.

We are being told that we have to set the fans up to run 24 hours a day 7 days a week to be in compliance with this article. My questions are.

1 - Are we already in compliance already?
2 - If we are not in compliance what is the purpose of having the switches and pilot lights outside the entry door if the fan has to run 24/7?

Thank you for this question.

In my opinion, you are in compliance with the OSHA regulation. However, you have not said if this is a temporary or fixed facility, which would place you under the 1910 General Industry regulations. Also please consider what your local fire code may say in the area you are located in. It may be stricter than OSHA, which then means it has to be followed.

I hope this helps you.

Occupational (OSHA) and Environmental Hazards

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Bubba Essary


I have 27 years in the Construction Safety Industry. I can answer questions relating to construction safety for industrial, commercial, heavy high & bridge, residential, and power plants.


I have 27 years experience in both construction and general industrial safety. I have worked many projects from offshore marine construction, large industrial projects, automotive construction projects, shipyard construction, petrochemical and refinery construction, both fossil fuel and gas turbine power plants to name a few. I have worked for clients such as Fluor Daniels, Texas Utilities, Proctor & Gamble, Daimler Chrysler, General Motors and J. Ray McDermott.

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