What is the dust wipe standard for floors in a lead hazard screen?

The dust wipe standard for floors in a lead hazard screen is set at 10 micrograms per square foot (ug/ft²). This standard is crucial in determining whether intervention is needed to address lead exposure risks, especially in environments where children might be present. A lower threshold like 10 ug/ft² is indicative of stricter guidelines aimed at ensuring a safer living environment, particularly in residential settings with the potential for lead dust accumulation. This threshold reflects the recognition that even minimal lead exposure can be harmful, especially for young children, who are more susceptible to the adverse effects of lead. Setting the standard at 10 ug/ft² emphasizes the importance of maintaining a clean and lead-safe environment, reducing the risks associated with lead poisoning.

The other options represent higher thresholds, which would not align with the current understanding of lead safety guidelines aimed at preemptively identifying potential hazards before they pose serious health risks.