What is the recommended depth for taking a soil sample?

The recommended depth for taking a soil sample is typically 2 inches. This depth is optimal for assessing lead contamination and other environmental factors in soil. At 2 inches, the sample captures the surface layer where disturbing activities, such as children playing or gardening, may disturb lead-contaminated dust or soil. Additionally, this depth is effective in reflecting the most relevant exposure risks, as it aligns with where individuals, particularly children, may come in contact with the soil.

Sampling at different depths can yield varying results, and deeper samples may not accurately represent the contamination level that is most pertinent for health risk assessments. Therefore, adhering to the 2-inch depth ensures that the soil sample provides a relevant indication of potential lead exposure risks in residential environments or areas with previous industrial activities.