OSHA 8 Hour HAZWOPER Refresher course is designed to for workers who need to refresh an existing 24 or 40-hour HAZWOPER certification. In order to comply with OSHA’s Hazardous Waste Operations and Emergency Response (HAZWOPER) Regulations, employees may need to be provided with “site-specific” information, as well as “hands-on” training, in addition to the course. This course is designed to be completed in approximately 8 hours and can complete within 2 weeks.