Which of the following is NOT part of the sampling process in a unit with high or moderate risk?

In a unit with high or moderate risk, the sampling process is critical to accurately assessing lead exposure risks. The sampling typically includes testing various surfaces that are likely to have lead-based paint or lead dust due to wear and tear.

The correct answer highlights that a floor sample in the kitchen is not part of the standard sampling process in a high or moderate risk unit. In these situations, the focus is usually on surfaces that children frequently interact with or are likely to generate lead exposure, such as window sills, window wells, and certain horizontal surfaces. While floor samples can be important in a comprehensive risk assessment, they are not prioritized in the core sampling strategy for high-risk units, which focuses on surfaces more prone to lead contamination.

The inclusion of two window wells and two window sills is pertinent because these areas are common points of lead dust accumulation due to their proximity to windows where paint can deteriorate. A blank sample is also crucial as it helps in the calibration and validation of the sampling process by providing a measure to identify contamination during testing. Thus, the kitchen floor sample does not conform to the critical areas typically examined in the initial sampling steps for assessing lead risks.