What is the lead concentration threshold for dust wipe samples collected from troughs?

The lead concentration threshold for dust wipe samples collected from troughs is established based on guidelines from the U.S. Environmental Protection Agency (EPA) and other regulatory bodies that address lead exposure risks. A threshold of 400 micrograms per square foot (ug/ft²) is identified as the action level for lead dust in residential environments, particularly in areas where children may be present.

This threshold is important because it reflects levels that could pose a significant risk of lead exposure, which can lead to various health issues, particularly in young children. The guideline helps in assessing the need for remediation or cleanup efforts to ensure a safe living environment.

By using this specific concentration level, health and safety professionals can effectively evaluate the presence of lead contamination within residential properties and implement necessary interventions to protect public health.