During and shortly after methyl bromide application, regulation using which method is often employed?

• A. Ventilation using fans
• B. Reducing pressure
• C. Increasing humidity
• D. Cooling the area

Answer: (A)

Controlling fumigant exposure through active ventilation. During and after applying methyl bromide, moving air with fans is used to dilute and remove vapors so air concentrations drop to safe levels quickly. This purge/ventilation helps meet worker exposure limits and allows re-entry once the space is declared safe, by actively exchanging contaminated air for cleaner outside air. Humidity, cooling, or changing pressure don’t reliably achieve the same rapid, controlled reduction in airborne methyl bromide and aren’t standard regulatory methods for managing fumigation vapors.