Confined or Enclosed Spaces and Other Dangerous Atmospheres » Pre-Entry (Planning)
Figure 1: Testing atmosphere in confined space
Figure 1: Testing atmosphere in confined space.

Figure 2: Ventilation leading into an enclosed space
Figure 2: Ventilation leading into an enclosed space.

Figure 3: Workers being trained in isolation areas for asbestos removal
Figure 3: Workers being trained in isolation areas for asbestos removal.
Figure 4: Rescue team practicing confined space rescue
Figure 4: Rescue team practicing confined space rescue.

Confined or enclosed spaces may present hazards such as oxygen-deficient or oxygen-enriched atmospheres, flammable atmospheres, toxic atmospheres, or a combination of these. Employers must ensure that work can be performed safely before permitting employees to enter these spaces.

During preparation for entry and work, shipyard personnel must consider safety issues including: electrical hazards, illumination, ventilation, means of access (such as ladders), fall protection, and other potential hazards.

A Marine Chemist or Shipyard Competent Person (SCP) must then conduct atmospheric testing and perform a visual inspection.

Only Marine Chemists, Shipyard Competent Persons (SCP), and Certified Industrial Hygienists (CIH) may evaluate confined and enclosed spaces.

Pre-entry evaluation should include the following: