In the dust sampling procedure, which sequence correctly outlines the steps from start to finish?

In the dust sampling procedure, which sequence correctly outlines the steps from start to finish?

• A. Layout the sample area; measure the area; prepare the tube; place gloves on; wipe in an S motion; place folded wipe in the sampling tube; clean up
• B. Prepare the tube; wipe the sample area; lay out the sample area; measure
• C. Wipe the sample area first; layout the sample area; measure; prepare the tube
• D. Layout; wipe; measure; clean up; prepare tube

Answer: (A)

Planning the sampling area and controlling contamination first sets a reliable foundation for the test. By layout out the area and then measuring it, you define exactly where and how large the sample will be, which helps keep the results consistent and well documented. Next, having the tube prepared ensures a ready, clean container so the moment you collect the wipe is not delayed, reducing opportunities for contamination. Putting on gloves before handling the surface is essential to prevent skin oils and other contaminants from transferring to the wipe or the area during sampling. Wiping in an S motion across the defined surface provides a systematic, uniform collection of dust, improving representativeness. After wiping, placing the folded wipe into the sampling tube immediately protects the collected material and keeps it ready for transport to the lab. Finally, cleaning up helps return the area to its ordinary state and avoids any leftover contamination.

Planning the sampling area and controlling contamination first sets a reliable foundation for the test. By layout out the area and then measuring it, you define exactly where and how large the sample will be, which helps keep the results consistent and well documented. Next, having the tube prepared ensures a ready, clean container so the moment you collect the wipe is not delayed, reducing opportunities for contamination. Putting on gloves before handling the surface is essential to prevent skin oils and other contaminants from transferring to the wipe or the area during sampling. Wiping in an S motion across the defined surface provides a systematic, uniform collection of dust, improving representativeness. After wiping, placing the folded wipe into the sampling tube immediately protects the collected material and keeps it ready for transport to the lab. Finally, cleaning up helps return the area to its ordinary state and avoids any leftover contamination.