What specific wording is required for warning signs inside a work area?

The requirement for warning signs inside a work area where lead is present is focused on the specific health risks associated with lead exposure, particularly concerning reproductive health. The phrasing "Danger: Lead may damage fertility or the unborn child" meets regulatory standards by explicitly warning about the potential serious health effects that exposure to lead can have on both fertility and fetal development. This language is not only clear but also emphasizes the severity of the hazard, which is critical in environments where workers may be exposed to lead.

Other options do not adhere to the strict wording required by safety regulations. For instance, while "Caution: Lead may be present" implies a possible hazard, it lacks the urgency and specificity needed to inform workers about the serious health risks associated with exposure. Similarly, "Warning: Lead present, wear masks" suggests a preventive measure but does not convey the direct health dangers posed by lead exposure. "Alert: Lead exposure, proceed with caution" also fails to provide the necessary specificity regarding the health risks. Therefore, the selected wording is essential for ensuring worker safety and compliance with regulatory standards.