In the context of lead dust assessment, which term denotes the total lead per square foot?

In the context of lead dust assessment, which term denotes the total lead per square foot?

• A. Area measurement
• B. Weight concentration
• C. Loading
• D. Wipe sampling

Answer: (C)

Loading is the total lead mass collected per unit area on a surface. When you wipe a defined area and measure how much lead is present, you divide by the wiped area to get the amount per square foot (often expressed in µg/ft^2). This is different from concentration, which would be lead per unit weight of dust (not per area), and from wipe sampling (the method) or area measurement (the area itself). So the term that denotes the total lead per square foot is loading.

Loading is the total lead mass collected per unit area on a surface. When you wipe a defined area and measure how much lead is present, you divide by the wiped area to get the amount per square foot (often expressed in µg/ft^2). This is different from concentration, which would be lead per unit weight of dust (not per area), and from wipe sampling (the method) or area measurement (the area itself). So the term that denotes the total lead per square foot is loading.