True or False: A chemical with a vapor density greater than one will tend to collect in low areas and below-grade places.

• A. True
• B. False
• C. Depends on the chemical
• D. Not applicable

Answer: (A)

The statement is true because a chemical with a vapor density greater than one is heavier than air. This property causes such vapors to settle and accumulate in low-lying areas and below-grade locations, such as basements or trenches, where air is less turbulent and can allow heavier vapors to gather. Understanding vapor density is crucial in hazardous materials management, as it helps in predicting the behavior of chemical vapors during a leak or spill. Consequently, monitoring and mitigating risks in these specific areas becomes essential for safety and environmental protection.