Which statement is true about high vs low soil standards?

• A. Low-contact standard is 400 ppm
• B. Low-contact standard is 800 ppm
• C. Low-contact standard is 1200 ppm
• D. Low-contact standard is not defined

Answer: (C)

In soil lead standards, how often people contact the soil matters. High-contact areas (like playgrounds or spots where kids frequently touch or mouth soil) require a stricter, lower threshold. Low-contact areas are touched much less often, so the allowable lead level is higher. That’s why the true statement is that the low-contact standard is 1200 ppm. The 400 ppm figure corresponds to high-contact areas, 800 ppm isn’t a standard threshold, and saying it’s not defined is incorrect.