Safely Enter Confined Spaces in the Workplace

Confined Space Awareness Training

Preparing Workers to Safely Enter Confined Spaces in the Workplace

Confined spaces pose unique and potentially life-threatening hazards to workers. As a responsible employer, it is your duty to ensure that your workers are adequately trained and prepared for confined space entry to protect their safety and well-being. In this comprehensive article, we will explore the critical steps and best practices for employers to safely prepare workers for entering confined spaces in the workplace.

Understanding Confined Spaces

Before delving into the preparation process, it is essential to understand what constitutes a confined space. A confined space is defined as an enclosed or partially enclosed space with limited means of entry or exit. It is not designed for continuous occupancy and may present hazards such as restricted airflow, toxic gases, or the potential for engulfment.

Confined spaces can include storage tanks, sewers, tunnels, silos, boilers, and many other workplace areas. These spaces can be dangerous due to factors such as hazardous atmospheres, mechanical hazards, or the potential for becoming trapped.

The Importance of Proper Training and Preparation

Confined space incidents can result in serious injuries or fatalities if not approached with caution and a high level of preparation. Employers must prioritize proper training and preparation to ensure the safety of workers entering confined spaces. The following steps outline how employers can safely prepare workers for such tasks.

  1. Identification and Evaluation of Confined Spaces:
    • The first step is to identify and evaluate all confined spaces within the workplace.
    • Employers should assess the potential hazards associated with each confined space, considering factors such as atmospheric conditions, physical hazards, and the need for rescue procedures.
  2. Developing a Confined Space Entry Program:
    • Employers must develop a comprehensive Confined Space Entry Program that outlines policies, procedures, and responsibilities.
    • The program should designate a competent person responsible for overseeing confined space activities and ensuring compliance with safety regulations.
  3. Worker Training and Competency:
    • All workers involved in confined space entry must receive adequate training and demonstrate competence in confined space safety.
    • Training should cover hazard recognition, emergency procedures, safe entry and exit, equipment usage, and the importance of continuous monitoring.
  4. Rescue Planning:
    • Employers must develop and document a rescue plan for each confined space entry.
    • This plan should include procedures for both self-rescue and external rescue, depending on the circumstances.
  5. Atmospheric Testing:
    • Before entry, the atmosphere within the confined space must be thoroughly tested using appropriate gas detectors and monitoring equipment.
    • Ensure that oxygen levels are within the safe range (typically 19.5% to 23.5%) and that toxic gases are below permissible exposure limits.
  6. Ventilation and Isolation:
    • Adequate ventilation should be established to ensure that the confined space atmosphere remains safe.
    • The space should also be isolated from other potentially hazardous processes, and all lines, pipes, and equipment leading into the space must be locked out or tagged out.
  7. Proper Equipment and PPE:
    • Workers should be provided with appropriate personal protective equipment (PPE) for confined space entry.
    • This may include respiratory protection, fall protection, and clothing suitable for the work environment.
  8. Communication and Monitoring:
    • Continuous communication with workers inside the confined space is critical.
    • Employers should establish a system for monitoring workers and ensuring their safety throughout the entry process.
  9. Entry Permit System:
    • Employers should implement an entry permit system that authorizes workers to enter a confined space only after the necessary precautions and safety measures have been taken.
    • The permit should detail the scope of work, potential hazards, safety measures, and rescue procedures.
  10. Emergency Response:
    • Employers must have a well-defined emergency response plan in case of a confined space incident.
    • This plan should include procedures for contacting emergency services and initiating rescue operations.
  11. Training Updates and Refresher Courses:
    • Regularly update and refresh workers’ confined space training to keep them informed about new hazards, equipment, or procedures.
    • Training should be ongoing to ensure that workers remain competent and aware of safety protocols.

Real-World Implementation

To illustrate the practical implementation of these steps, let’s consider a real-world scenario in a manufacturing plant that frequently requires workers to enter confined spaces, such as storage tanks:

Scenario: A manufacturing plant in Ontario, Canada, has several large storage tanks used for storing raw materials and chemicals. Workers often need to enter these tanks for inspection and maintenance. The employer has established a comprehensive confined space entry program.


  1. Identification and Evaluation:
    • The plant management identifies all confined spaces, including storage tanks, and conducts thorough hazard assessments.
    • The assessments reveal potential hazards like toxic gases and low oxygen levels.
  2. Confined Space Entry Program:
    • The company develops a Confined Space Entry Program, designating a competent person responsible for overseeing confined space activities.
    • The program outlines procedures for hazard assessment, atmospheric testing, and rescue planning.
  3. Worker Training:
    • All workers involved in confined space entry, including supervisors and safety personnel, undergo comprehensive confined space training.
    • Training covers atmospheric testing, equipment usage, ventilation, and emergency response.
  4. Rescue Planning:
    • A detailed rescue plan is created for each storage tank, specifying rescue equipment, communication methods, and emergency contact information.
    • Workers are trained in self-rescue and external rescue procedures.
  5. Atmospheric Testing:
    • Gas detectors and atmospheric testing equipment are used to ensure safe oxygen levels and the absence of toxic gases before any worker enters a storage tank.
  6. Ventilation and Isolation:
    • The plant installs ventilation systems in storage tanks to maintain safe atmospheric conditions.
    • All pipes leading into the tanks are locked out or tagged out during entry.
  7. Equipment and PPE:
    • Workers are provided with appropriate PPE, including respirators, fall protection, and protective clothing.
    • Equipment is regularly inspected and maintained.
  8. Communication and Monitoring:
    • A two-way communication system is established to maintain constant contact with workers inside the tanks.
    • Workers are monitored using gas detectors and visual checks.
  9. Entry Permit System:
    • An entry permit system is implemented, requiring workers to complete a permit before entering a storage tank.
    • Permits include hazard assessments, safety measures, and rescue procedures.
  10. Emergency Response:
    • The company has a well-defined emergency response plan in place, which includes contacting emergency services and trained rescue teams.
  11. Training Updates:
    • Workers undergo regular updates and refresher courses to stay informed about the latest safety protocols and equipment.


  • The company significantly reduces the risk of confined space incidents, leading to a safer working environment.
  • Workers are well-prepared and confident when entering confined spaces, contributing to increased efficiency and productivity.
  • The comprehensive program ensures regulatory compliance and peace of mind for both workers and management.

Properly preparing workers to enter confined spaces is a crucial responsibility for employers in various industries. Prioritizing training, hazard assessment, communication, and emergency response planning significantly enhances worker safety in these challenging environments. By following best practices and implementing a comprehensive Confined Space Entry Program, employers can ensure that their workers are adequately prepared and equipped to work safely in confined spaces, ultimately reducing the risk of accidents and injuries while fostering a culture of safety within the workplace.