OSHA HAZWOPER 40-Hour — Study Guide
Free, topic-by-topic study notes for the OSHA HAZWOPER 40-Hour exam. Read a chapter, then practice it.
Hazard Recognition & Toxicology
Everything in HAZWOPER work begins with recognizing what can hurt you and understanding how much exposure matters. This chapter introduces the routes by which contaminants enter the body, the basics of dose and response, and the exposure limits and monitoring tools used to keep workers safe.
PPE Use & Selection
Personal protective equipment is the last line of defense when hazards cannot be fully removed by engineering or work-practice controls. This chapter explains the EPA levels of protection, the main types of respirators, and why every piece of PPE has limits that must be respected.
Safe Work Practices & Engineering Controls
Good procedures and engineering controls reduce hazards before PPE is ever needed. This chapter covers the buddy system, the three-zone site layout, confined-space precautions, ventilation, and basic spill control that keep hazardous waste work organized and safe.
Decontamination & Emergency Response
Removing contamination and responding well to emergencies protect both workers and the surrounding community. This chapter describes decontamination lines and methods, the elements of an emergency response plan, the Incident Command System, and safe evacuation.
Medical Surveillance
Medical surveillance watches over worker health across a career of potential exposures. This chapter explains baseline and periodic exams, exposure monitoring, recordkeeping, and the fitness-for-duty judgment that keeps workers safe on demanding jobs.
Site Safety & Health Personnel
Clear plans and defined roles turn safety principles into daily practice. This chapter introduces the site health and safety plan, the key personnel who run it, and the training requirements that prepare workers before they face hazards.
Practice by topic
Jump straight into free practice questions for any single OSHA HAZWOPER 40-Hour topic.