What calculation is made when the lab finds lead in a wipe sample?

When a laboratory finds lead in a wipe sample, it performs a concentration calculation that provides the amount of lead in micrograms per square foot (ug/ft²). This measurement is crucial because it helps determine the level of lead contamination on surfaces, which is vital for assessing the potential risk of exposure in environments, especially those frequented by children or pregnant women.

The concentration in micrograms per square foot gives a clear indication of the severity of contamination. Health guidelines often have specific thresholds for lead levels that dictate whether remediation is necessary. By calculating the concentration, assessors can make informed decisions about the safety of the environment and whether intervention is needed to reduce lead exposure risk.

The other processes, while related to sample collection and analysis, do not directly measure the concentration of lead in the way that this calculation does. Understanding the concentration allows for effective assessment and management of lead-related health risks.