Which surfaces are included in composite wipe sampling?

Which surfaces are included in composite wipe sampling?

• A. Bare floors, carpeted floors, window sills, window troughs, exterior surfaces
• B. Only ceilings
• C. Interior walls
• D. Inside drawers

Answer: (A)

Composite wipe sampling is about combining several wipe samples from surfaces where lead dust tends to accumulate into one analysis, to efficiently assess exposure risk. The surfaces chosen are where dust settles and where people—especially kids—are most likely to come into contact with it during normal activities. Floors, whether bare or carpeted, capture dust tracked in from outside and shed from painted surfaces. Window sills and window troughs are classic dust collectors near openings, where dust can settle from both indoor deterioration and outdoor sources. Exterior surfaces are included because dust on the outside can contribute to indoor contamination through tracking or windblown dust, so sampling them helps gauge overall exposure potential. Other surfaces like ceilings, interior walls, or items such as inside drawers aren’t typically used in composite wipe sampling because they’re less representative of the common exposure pathways or are impractical to wipe in a way that yields meaningful, comparable results.

Composite wipe sampling is about combining several wipe samples from surfaces where lead dust tends to accumulate into one analysis, to efficiently assess exposure risk. The surfaces chosen are where dust settles and where people—especially kids—are most likely to come into contact with it during normal activities. Floors, whether bare or carpeted, capture dust tracked in from outside and shed from painted surfaces. Window sills and window troughs are classic dust collectors near openings, where dust can settle from both indoor deterioration and outdoor sources. Exterior surfaces are included because dust on the outside can contribute to indoor contamination through tracking or windblown dust, so sampling them helps gauge overall exposure potential.

Other surfaces like ceilings, interior walls, or items such as inside drawers aren’t typically used in composite wipe sampling because they’re less representative of the common exposure pathways or are impractical to wipe in a way that yields meaningful, comparable results.