Confined Space training helps workers understand the hazards, procedures, and safety requirements associated with entering and working in confined spaces. The training is designed to help workers recognize confined space hazards, follow safe entry procedures, and better understand their responsibilities when working in or around confined spaces.

Confined spaces may include areas such as:

• tanks,

• vaults,

• silos,

• pits,

• tunnels,

• manholes,

• and other enclosed or partially enclosed spaces where hazards may exist.

Confined Space training commonly covers:

• hazard recognition,

• atmospheric hazards,

• entry procedures,

• ventilation,

• lockout and isolation,

• emergency procedures,

• communication,

• and worker responsibilities.

The course may include both theoretical instruction and practical discussions designed to help workers apply confined space safety principles in real workplace environments.

Confined Space training may be beneficial for workers, supervisors, attendants, and rescue personnel who work in or around confined spaces.

Industries and workplaces that commonly require confined space awareness or entry training may include:

• construction,

• manufacturing,

• industrial facilities,

• utilities,

• municipalities,

• maintenance operations,

• water treatment facilities,

• and commercial operations.

Workers involved in confined space entry, supervision, atmospheric testing, or rescue planning may require appropriate training related to confined space hazards and safe work procedures.

Confined spaces may contain a variety of serious workplace hazards that can quickly become dangerous without proper planning, hazard controls, and safe work procedures.

Common confined space hazards may include:

• oxygen deficiency or oxygen enrichment

• toxic gases or vapours

• flammable or explosive atmospheres

• engulfment hazards

• mechanical or electrical hazards

• poor ventilation

• heat stress

• restricted movement or limited visibility

Because confined space hazards can change quickly, proper hazard assessments, atmospheric testing, communication, and emergency planning are important parts of confined space safety.

Atmospheric testing is the process of monitoring the air inside a confined space to help identify hazardous conditions before and during entry.

Atmospheric testing may be used to detect:

• oxygen levels,

• flammable gases,

• toxic gases,

• and other potentially dangerous airborne hazards.

Proper atmospheric testing helps workers determine whether a confined space is safe to enter and whether additional hazard controls or ventilation may be required.

Confined Space training may include discussions related to:

• gas monitoring equipment,

• testing procedures,

• continuous monitoring,

• and atmospheric hazard awareness.

In Ontario, a confined space is generally defined as a fully or partially enclosed space that:

• is not designed for continuous human occupancy,

• has limited or restricted entry or exit,

• and may become hazardous to workers because of its atmosphere, contents, design, configuration, or the work being performed inside the space.

Confined space requirements in Ontario are governed by Ontario Regulation 632/05 under the Occupational Health and Safety Act (OHSA), which outlines requirements related to hazard assessments, entry procedures, worker training, atmospheric testing, communication, and emergency planning.

Examples of confined spaces may include:

• storage tanks,

• vessels,

• pits,

• tunnels,

• sewers,

• boilers,

• crawl spaces,

• silos,

• and underground utility vaults.

Confined spaces may contain hazards such as:

• oxygen deficiency or oxygen enrichment,

• toxic gases or vapours,

• flammable or explosive atmospheres,

• engulfment hazards,

• mechanical or electrical hazards,

• poor ventilation,

• or restricted movement.

Employers are responsible for assessing workplace spaces, identifying confined space hazards, and implementing appropriate safety procedures and worker training to help protect workers entering or working around confined spaces.

At DNT Safety Training, we believe Confined Space training should focus on practical workplace safety, hazard awareness, and real-world application — not just regulations and theory alone.

Our training is designed to help workers better understand:

• confined space hazards,

• safe entry procedures,

• atmospheric hazards,

• communication,

• emergency planning,

• and workplace responsibilities related to confined space operations.

Why workers and employers across Ottawa and Ontario choose DNT Safety Training:

• Practical and engaging confined space training

• Experienced and approachable instructors

• Training focused on real workplace hazards and procedures

• Strong emphasis on hazard recognition and worker safety

• Scenario-based learning and practical workplace discussions

• Confined Space training available across Ottawa and throughout Ontario

• Training designed to be practical, informative, and easy to follow

• Focus on communication, hazard awareness, and safe work procedures

Whether you are a worker, supervisor, attendant, or employer looking to strengthen confined space safety knowledge within your workplace, DNT Safety Training is committed to providing high-quality safety training that supports safer workplaces across Ottawa and Ontario.