5705.3.7 Rooms or Buildings for Quantities Exceeding the Maximum Allowable Quantity Per Control Area
Continuous mechanical ventilation shall be provided at a rate of not less than 1 cfm per square foot [0.00508 m3/(s • m2)] of floor area over the design area. Provisions shall be made for introduction of makeup air in such a manner to include all floor areas or pits where vapors can collect. Local or spot ventilation shall be provided where needed to prevent the accumulation of hazardous vapors. Ventilation system design shall comply with the International Building Code and International Mechanical Code.
Exception: Where natural ventilation can be shown to be effective for the materials used, dispensed or mixed.