If a hazmat incident involves a leaking flammable substance, the first responders should immediately remove all:

If a hazmat incident involves a leaking flammable substance, the first responders should immediately remove all:

• A. Ignition sources
• B. People
• C. Valves
• D. Water

Answer: (A)

Flammable vapors ignite when they encounter an ignition source, so the first priority is to remove anything that could spark or heat the atmosphere around the leak. This means eliminating electrical devices, turning off nonessential equipment, grounding and bonding to prevent static discharge, and avoiding flames or hot surfaces in the area. By getting rid of ignition sources, you dramatically reduce the chance that leaking vapors will ignite, even while you work to contain the spill. Evacuating people is crucial for safety, but the action that most directly reduces the immediate fire/explosion risk is removing ignition sources. Closing a valve to stop the leak may help, but vapors can still be present and an ignition source could ignite them; prioritizing ignition-source control minimizes that ignition risk right away. Water isn’t protective here and can spread flammable liquid or create other hazards, so it isn’t the correct immediate measure.

Flammable vapors ignite when they encounter an ignition source, so the first priority is to remove anything that could spark or heat the atmosphere around the leak. This means eliminating electrical devices, turning off nonessential equipment, grounding and bonding to prevent static discharge, and avoiding flames or hot surfaces in the area. By getting rid of ignition sources, you dramatically reduce the chance that leaking vapors will ignite, even while you work to contain the spill.

Evacuating people is crucial for safety, but the action that most directly reduces the immediate fire/explosion risk is removing ignition sources. Closing a valve to stop the leak may help, but vapors can still be present and an ignition source could ignite them; prioritizing ignition-source control minimizes that ignition risk right away. Water isn’t protective here and can spread flammable liquid or create other hazards, so it isn’t the correct immediate measure.