8 Hour HAZWOPER Refresher With Wallet ID Card. Meets Federal and State OSHA HAZWOPER refresher training requirements. Students with 24- or 40-hour OSHA HAZWOPER certification are required by OSHA to refresh their certification every year. The OSHA 8 Hour HAZWOPER Refresher course meets the requirements to refresh these certifications. There are several versions of this course to choose from, ...
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