True or False: It is recommended to have additional test locations for each unique foundation area, including split-level and slab-on-grade designs.

Having additional test locations for each unique foundation area is crucial for accurately assessing radon levels in a property. Different foundation designs, such as split-level homes, slab-on-grade, or homes with multiple levels, can significantly influence radon entry and concentration due to variations in construction, ventilation, and the surrounding geology.

Testing at different locations allows for a comprehensive understanding of radon exposure across the entire living space, ensuring that all potential radon entry points are evaluated. Since radon levels can fluctuate based on various factors, including the time of year and changes in the home’s ventilation, multiple testing sites are necessary to capture the complete radon profile of the home. Therefore, testing in each unique foundation area provides the best chance of identifying high levels of radon and ensuring that appropriate mitigation measures can be taken if needed.

This approach aligns with best practices in radon measurement, emphasizing the importance of thorough testing to protect occupant health.