Bare Soil - Building Perimeter & Yard Criteria value?

Bare Soil - Building Perimeter & Yard Criteria value?

• A. 400 ppm
• B. 5000 ppm
• C. 1200 ppm
• D. 1500 ppm

Answer: (C)

The idea being tested is how soil lead hazard thresholds are applied to bare soil around a building. Different areas have different action levels, guiding whether remediation or protective measures are needed. For bare soil in the building perimeter and yard, the threshold used is 1200 parts per million. When soil in that zone exceeds 1200 ppm, it’s treated as a lead hazard and requires action such as soil removal, covering, or other controls to reduce exposure risk. The other numbers correspond to different contexts: 400 ppm is the common threshold for bare soil in children’s play areas, where exposure risk is higher due to hand-to-mouth activity, while 5000 ppm is not the standard threshold used for this scenario.

The idea being tested is how soil lead hazard thresholds are applied to bare soil around a building. Different areas have different action levels, guiding whether remediation or protective measures are needed. For bare soil in the building perimeter and yard, the threshold used is 1200 parts per million. When soil in that zone exceeds 1200 ppm, it’s treated as a lead hazard and requires action such as soil removal, covering, or other controls to reduce exposure risk. The other numbers correspond to different contexts: 400 ppm is the common threshold for bare soil in children’s play areas, where exposure risk is higher due to hand-to-mouth activity, while 5000 ppm is not the standard threshold used for this scenario.