29 CFR 1910.146
Confined Space Training
A confined space has limited or restricted means for entry or exit, and it is not designed for continuous employee occupancy. Confined spaces include, but are not limited to underground vaults, tanks, storage bins, manholes, pits, silos, process vessels, and pipelines and open top spaces more than 4 feet in depth such as pits, tubs, vaults, and vessels.
CONFINED SPACE TRAINING CLASSES WE OFFER:
Confined Space Entry Training
Confined Space Entry Refresher Training
Confined Space Rescue Training
Confined Space Rescue Refresher Training