1 Definition of a Confined Space
From the NS regulations
An enclosed or partially enclosed space:
- not designed or intended for regular human occupancy;
- with restricted access or exit; and
- that is or may become hazardous to a person entering it because of its design, construction, location, atmosphere or the materials or substances in it or other conditions.
When considering whether a space is classified as a “confined space”, a person must not take into account the use of personal protective equipment or ventilation, as these may fail.[1]
From the Canada Occupational Health and Safety Regulations (federal regulations under the CLC Pt. II for land-based work)
An enclosed or partially enclosed space that:
- is not designed or intended for human occupancy except for the purpose of performing work,
- has restricted means of access and egress, and
- may become hazardous to any person entering it owing to
- its design, construction, location, or atmosphere,
- the materials or substances in it, or any other conditions relating to it.[2]
Typical Confined Spaces
- Vaults
- Boilers
- Waste tanks
- Pumping stations
- Pits, sumps
- Culverts
- Reservoirs
- Storage tanks
- Digesters
- Wells
- Attics
- Stacks
- Ventilation ducts
- Crawl spaces
- Manholes
- Ovens
- Storage bins
- Other similar spaces
Inventory & Signage
All confined spaces should be identified and an inventory prepared. A process should be in place for keeping the inventory current, and it should be reviewed at least every three years.
Where practical, a sign should be located at each external entry point to the confined space identifying the space as a confined space, identifying access restrictions, indicating that a permit is required prior to entry, and including contact information for persons with concerns or questions.
Exercise
List the confined spaces that you recognize in your workplace: