In Canada, the requirements for confined space entry are governed by the Canada Occupational Health and Safety Regulations, which outline specific procedures and safety measures that must be followed. Here are the key requirements:

1. Entry Permit System: If required, an entry permit system must be in place, specifying the duration of the permit and recording the name of the person entering, the date and time of entry and exit, and the actual date and time of exit [1].

2. Verification Before Entry: A qualified person must verify that the atmosphere inside the confined space is safe, ensuring that the concentration of any chemical agents does not exceed permissible limits and that the oxygen level is between 19.5% and 23% by volume [2].

3. Safety Measures: The space must be free of any liquids or solids that could pose a drowning or entrapment hazard, and all hazardous materials must be secured to prevent entry [2].

4. Equipment and Training: Employees must be provided with appropriate protective equipment and trained in the procedures and emergency measures for confined space entry [3].

5. Continuous Monitoring: If continuous ventilation is required, continuous atmospheric monitoring must be conducted while the space is occupied [3].

6. Emergency Procedures: Employers must establish emergency procedures, including a plan for immediate evacuation if an alarm is activated or if there is a significant change in atmospheric conditions [4].

7. Record Keeping: Employers must keep records of all confined spaces and ensure they are up-to-date and accessible. Reports and procedures must be retained for a specified period [5].

These requirements are specific to Canada and may differ from OSHA regulations in the United States. It is important to consult the local regulations applicable to your jurisdiction for detailed guidance.