Which soil zone has the lower lead concentration limit for compliance testing?

Which soil zone has the lower lead concentration limit for compliance testing?

• A. 200 ppm play area, 800 ppm
• B. 600 ppm play area, 1200 ppm
• C. 400 ppm play area, 1200 ppm
• D. 100 ppm play area, 600 ppm

Answer: (C)

Lead exposure risk is highest where children play, so compliance testing uses a stricter soil lead limit there. The EPA guideline sets 400 ppm for play areas and 1200 ppm for all other soil around the home. So the soil zone with the lower permissible concentration is the play area, at 400 ppm, with the rest of the yard allowed up to 1200 ppm. The option that shows 400 ppm for the play area and 1200 ppm for the other area matches these standards. Other options don’t align with these EPA limits.

Lead exposure risk is highest where children play, so compliance testing uses a stricter soil lead limit there. The EPA guideline sets 400 ppm for play areas and 1200 ppm for all other soil around the home. So the soil zone with the lower permissible concentration is the play area, at 400 ppm, with the rest of the yard allowed up to 1200 ppm. The option that shows 400 ppm for the play area and 1200 ppm for the other area matches these standards. Other options don’t align with these EPA limits.