3 hour class is required continuing ed for currently certified  

Grade Level II installers

4 hour class is required for pump truck operators

this class will also include 3 hours credit for installer

6 hour class includes credits needed for continuing education hours needed for current installers GL III and GL IV, subsurface operators, RS, Evaluators and also includes the 4 hours needed for pumper

This class also covers hours for those seeking new installer or inspector certification