In which part of a house are the highest lead levels found in relation to soil sampling?

The highest lead levels in relation to soil sampling are typically found at the dripline of a house. The dripline refers to the area directly beneath the eaves of a building where rainwater drips off the roof. This location often accumulates contaminants that have leached from the house's structure, including lead from paints used on exterior surfaces. Over time, lead dust and particulates can settle in this area, increasing lead concentration in the soil.

In comparison, while other areas of the yard, such as gardens and basements, may also contain lead, the proximity of the dripline to the house, combined with the combined effects of rain runoff and wear from exterior surfaces, make it a hotspot for lead contamination. Soil sampling in this location is crucial for assessing potential lead exposure risks, especially in older homes where lead-based paints were more commonly used.