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

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.

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

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.

Figure 3: Workers being trained in isolation areas for asbestos removal
Figure 3: Workers being trained in isolation areas for asbestos removal

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

Figure 4: Rescue team practicing confined space rescue
Figure 4: Rescue team practicing confined space rescue

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: