What is the lead soil clearance value for contact areas?

What is the lead soil clearance value for contact areas?

• A. 1200 ppm
• B. 400 ppm
• C. 800 ppm
• D. 200 ppm

Answer: (B)

Soil clearance values are set differently for areas people touch versus areas they don’t. For areas that are in frequent contact with skin (contact areas), the standard you need to meet after cleaning is 400 ppm lead in soil. This stricter limit helps reduce the risk of hand-to-mouth ingestion in children who are likely to touch the soil and then put their hands in their mouths. Non-contact areas have a higher threshold (not the focus here), which is why the other numbers don’t apply to contact areas. Therefore, 400 ppm is the correct clearance value for contact areas.

Soil clearance values are set differently for areas people touch versus areas they don’t. For areas that are in frequent contact with skin (contact areas), the standard you need to meet after cleaning is 400 ppm lead in soil. This stricter limit helps reduce the risk of hand-to-mouth ingestion in children who are likely to touch the soil and then put their hands in their mouths. Non-contact areas have a higher threshold (not the focus here), which is why the other numbers don’t apply to contact areas. Therefore, 400 ppm is the correct clearance value for contact areas.