Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

What is the OSHA action level for lead exposure?

1. 400 ppm

2. 300 ppm

3. 200 ppm

4. 500 ppm

The correct answer is: 400 ppm

The OSHA action level for lead exposure is established at 30 micrograms per cubic meter of air, calculated as an 8-hour time-weighted average. To put this into context regarding the choices provided, it is essential to understand that OSHA creates guidelines to protect workers from hazardous substances, including lead. The limit presented as 400 ppm pertains to a different standard and does not accurately reflect OSHA's regulations regarding lead in terms of airborne levels. In fact, OSHA's standards focus on measuring lead in micrograms per cubic meter rather than parts per million (ppm). The confusion may arise from interpreting different aspects or contexts of lead exposure, such as environmental exposure levels versus occupational safety limits. In summary, while the action level is associated with the potential for harm and the requirement for further monitoring, training, and control measures, the actual figures in parts per million can mislead when considering specific regulations like those set by OSHA. Understanding that lead exposure regulations center around micrograms per cubic meter helps clarify the importance of adhering to established industry safety standards.