What are the dimensions of a standard floor sampling template?

• A. 8" x 8"
• B. 12" x 12" (1 square foot)
• C. 10" x 10"
• D. 14" x 14"

Answer: (B)

The main idea is that floor sampling uses a fixed, standard area so results can be compared to cleanup criteria. A 12 inch by 12 inch template defines exactly one square foot of surface to sample. This size is the convention because lead-dust clearance limits are expressed per square foot, so using this area lets you report results in the appropriate units without extra calculations. If a different size were used, the sampled area would change, making results harder to compare across inspections and against the standard. The 12 x 12 template also provides a clear boundary to guide the wipe or sampling method, helping ensure consistency and reliability of the sample.