HAZWOPER course selection
HAZWOPER 24 Hour vs. 40 Hour: What Is the Difference?
HAZWOPER initial training is not one-size-fits-all. Both 24-hour and 40-hour training address hazardous-waste operations, but the appropriate level depends on a worker’s job function, likely exposure, assigned tasks, required protective equipment, and the site safety and health plan.
The 24-hour pathway may suit workers with limited, occasional site duties and lower anticipated exposure. The 40-hour pathway is generally for general-site workers whose work could expose them to hazardous substances or health hazards more broadly.
The two initial pathways
Who Each Course Is Designed For
Limited or Occasional Site Duties
The 24-hour training route may apply to employees who are on site only occasionally for specific, limited tasks and whose exposure is unlikely to exceed permissible limits or otherwise create a health hazard.
- Limited-scope work at a covered site
- Occasional site access rather than general-site operations
- One day of supervised field experience
- Annual refresher training while the worker remains covered
General-Site Hazardous-Waste Work
The 40-hour route generally applies to general-site workers who perform hazardous-substance removal or other activities that could expose them to hazardous substances, safety hazards, or health hazards.
- Broader hazardous-waste operations or cleanup duties
- Potential for exposure during assigned work
- Three days of supervised field experience
- Annual refresher training while the worker remains covered
At-a-glance comparison
24-Hour and 40-Hour HAZWOPER Requirements
| Consideration | 24-Hour HAZWOPER | 40-Hour HAZWOPER |
|---|---|---|
| Typical scope | Limited, occasional work with lower anticipated exposure. | General-site work that may expose the employee to hazardous substances or health hazards. |
| Off-site instruction | At least 24 hours. | At least 40 hours. |
| Supervised field experience | At least one day with a trained, experienced supervisor. | At least three days with a trained, experienced supervisor. |
| Refresher expectation | Annual refresher training while the worker remains subject to the requirement. | Annual refresher training while the worker remains subject to the requirement. |
| If duties increase | Additional training may be needed, including the extra training and field experience necessary to reach the 40-hour level. | Employer must still provide site-specific and task-specific training for assigned work. |
Common selection mistakes
What These Courses Do Not Decide on Their Own
Completing either initial course is an important part of the training record, but it does not independently authorize every hazardous-waste task or determine an employee’s PPE requirements.
Respirator and PPE Requirements
A 40-hour course does not automatically qualify a worker to use an SCBA or chemical-protective ensemble. Respirator use and PPE selection depend on the site hazard assessment, written program, medical evaluation, fit testing, equipment training, and assigned task.
Supervisory Responsibilities
Supervisors and on-site management responsible for hazardous-waste operations may need 40-hour initial training, supervised experience, and additional specialized instruction relevant to their responsibilities.
Choose with the employer
Three Questions to Ask Before Enrolling
What Work Will Be Performed?
Review the planned tasks, time on site, hazardous substances involved, and potential routes of exposure.
What Does the Site Plan Require?
Check the project safety and health plan, employer procedures, client requirements, and any site-specific training matrix.
What Happens After Coursework?
Confirm the required supervised field experience, site orientation, PPE instruction, and annual refresher schedule.
Online HAZWOPER training
Select the Course That Matches the Assignment
Stay Certified offers 24-hour and 40-hour HAZWOPER training, plus annual eight-hour refresher training. Confirm the required course level and field-experience arrangements with the employer before enrolling.
