8-hour class and practical required. Certificate good for 3 years.

Class time and previous certification required. Good for 3 years.

40 hours class time required. Certificate good for 1 year.

8-hour class and previous HazWoper completion required. Good for 1 year.

8-hour class required. Certificate good for 2 years.

10 hour class required. Certificate good for 3 years.

Written exam on Core and 1, 2, 3 or 4 Specialties must be passed, then Practical exam must be passed within 12 months of written exam date to obtain certification. Certification is good for 5 years.

24-hour class required. Certification is good for 1 year.

Certification is good for 1 year.