What is the maximum allowable lead concentration in recommended replacement soil?

The maximum allowable lead concentration in recommended replacement soil is established at 200 ppm (parts per million) based on health and safety guidelines. This limit is set to minimize the risk of exposure to lead, particularly for vulnerable populations such as children, who are at greater risk of lead poisoning.

Lead can cause various health problems, and since soil can be a significant source of exposure, maintaining low lead levels in replacement soil is critical to creating a safe environment. The 200 ppm threshold is in line with guidelines provided by environmental health organizations, which recommend this concentration level to ensure safety and mitigate health risks associated with lead exposure. This standard is influential in soil remediation practices to ensure that contaminated areas are restored to safe levels for residential and public use.