What is the mandated maximum lead standard for exterior living areas under Title X?

The mandated maximum lead standard for exterior living areas under Title X is 40 micrograms per square foot (mcg/ft²). This standard is important because it helps to protect public health by reducing the risk of lead exposure, particularly in children who are more vulnerable to the harmful effects of lead. The threshold is set based on research that establishes the point at which lead can become a significant risk, leading to various health issues, including developmental problems.

In the context of lead exposure regulations, the standard serves as a guideline for risk assessors and public health professionals to evaluate environmental lead hazards. By maintaining exterior living areas below this limit, the regulation aims to reduce the likelihood of lead contamination and its associated health impacts for residents, especially in older homes where lead-based paints and other sources of lead might be present.

The other options represent different measurements that may pertain to other contexts or regulations, but they do not align with the specific guidelines established for exterior living areas under Title X concerning maximum lead exposure.