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 https://www.osha.gov.

December 3, 1976

Mr. Robert Wiedenhoefer, P.E.
Total Comfort of Wisconsin, Inc.
302 North Pewaukee Road
Waukeshaw, Wisconsin 53186

In re: Your letter dated November 3, 1976 OSHA 1910.106 Flammable and Combustible Liquids

Dear Mr. Wiedenhoefer:

Inside storage rooms must be provided with either a gravity or a continuous mechanical exhaust ventilation system. The system shall be designed to provide for a complete change of air within the room at least six times per hour. If mechanical ventilation is provided, the make-up air may be taken from within the building but the opening shall be equipped with an approved fire door or damper.

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Very truly yours,

Assistant Regional Administrator
for Technical Support