Surface contaminants are characterized by which trait?

• A. Easy to detect and remove
• B. Difficult or impossible to detect and remove
• C. Direct physical contact with contaminant
• D. Contact with person or object previously contaminated

Answer: (A)

Surface contaminants are contaminants that reside on exterior surfaces and can be removed by standard decontamination methods. Because they sit on surfaces, they are typically detectable with common field detection methods or visual cues and are removable through routine cleaning, washing, or scrubbing. This makes the trait described—easy to detect and remove—the best fit for surface contamination in practical hazmat scenarios.

The idea that surface contaminants are difficult or impossible to detect and remove describes a different, less common situation where contaminants are fixed or embedded and require special procedures. The notion of direct physical contact with the contaminant or contamination transferred from one person or object to another relates more to exposure pathways than to the defining characteristic of surface contamination itself.