What defines soil lead hazards according to HUD/EPA standards?

The identification of soil lead hazards according to HUD/EPA standards is primarily based on specific concentration limits designed to protect public health, especially that of children. The correct choice states that a level of 400 parts per million (ppm) or more of lead is considered hazardous in play areas, reflecting the high vulnerability of children who frequently play in these locations. Additionally, the threshold of 1200 ppm or more in the rest of the lot recognizes the potential risks associated not only with direct play but also incidental exposure from soil that might be tracked indoors or come in contact with children.

These thresholds are based on research into the effects of lead exposure, which is particularly harmful to young children due to their developing bodies and brain. Recognizing elevated lead levels in both play areas and other parts of residential lots allows for targeted interventions to reduce risk.

The other options present different ppm cutoffs that do not align with the guidelines established by the HUD and EPA. Each specifies incorrect values for assessing lead hazards, which may fail to address the safety requirements to adequately protect children. By understanding these standards, professionals can better assess and manage lead-related hazards in the environment.