To what depth do we typically sample in the soil?

The standard practice for soil sampling in lead risk assessment typically involves collecting samples from the top layer of soil, specifically focusing on the top 5/8 inch. This depth is chosen because lead is most likely to be found in the top layers due to past activities that may have deposited lead contaminants, such as the use of lead-based paints or leaded gasoline.

Sampling from this depth ensures that the results are representative of the exposure risk to children and others who might come into contact with soil. Soil near the surface is more accessible and more likely to be disturbed by activities such as playing, gardening, or landscaping, making it crucial to assess the lead levels in this specific layer. By focusing on the top 5/8 inch, professionals can better determine the potential for lead exposure and take appropriate actions to mitigate any risks.