When should composite wipe samples be used?

When should composite wipe samples be used?

• A. To control cost and assume dust levels are similar across rooms.
• B. To maximize detection by testing every room individually.
• C. To avoid sampling exterior surfaces.
• D. To delay sampling until all rooms are rebuilt.

Answer: (A)

Composite wipe sampling is a cost-conscious approach used when you expect dust loading to be similar across multiple rooms. By pooling surfaces into one wipe sample, you reduce the number of lab analyses, saving time and money while still providing a general sense of the dust burden in the area. It’s best when you want an overall assessment and you don’t anticipate large differences between rooms. If contamination can vary significantly from room to room, a composite result may mask hotspots or underestimate localized contamination, making individual-room samples more reliable in that case.

Composite wipe sampling is a cost-conscious approach used when you expect dust loading to be similar across multiple rooms. By pooling surfaces into one wipe sample, you reduce the number of lab analyses, saving time and money while still providing a general sense of the dust burden in the area. It’s best when you want an overall assessment and you don’t anticipate large differences between rooms. If contamination can vary significantly from room to room, a composite result may mask hotspots or underestimate localized contamination, making individual-room samples more reliable in that case.