Supervisors shall identify and report all job areas and locations that are or may be confined spaces.
Maintain and provide a list of confined spaces that are identified which shall be submitted to the Safety Organization.
In addition, the designated supervisors shall carry out the following tasks:
Classify confined spaces as "permit required," “Alternate Procedure” or "non-permit required.”
Identify personnel who will enter confined spaces.
Identify the personnel under their supervision required to wear respirators.
Advise personnel on routine measurement of respiratory hazards in confined spaces.
Provide detailed instruction and training on confined space hazards and entry procedures to those who may enter confined paces.
Provide instruction to personnel on the proper use of equipment required for confined space entry.
Maintain equipment that is used to enter confined spaces.
Maintain records of equipment maintenance and employee training.
Inform employees who may enter the permit confined space by posting danger signs or by training.
Issuance and cancellation of entry permits.
Establishment of a lockout program for their department.
Identify and evaluate the hazards of permit spaces before employees enter them.
Conduct a pre-entry briefing to inform entrants of possible hazards that may be encountered.
Identify the people who will enter the confined spaces.
Take the necessary measures to prevent entrance into prohibited permit spaces.
Know the potential hazards during entry and work.
Determine if acceptable entry conditions are present at a permit space where entry is planned.
Terminate entry as required by the standard.
Verify that rescue services are readily available and the means for summoning them are operable.
Remove unauthorized individuals who enter or try to enter the permit space during entry and work.
Determine that entry and work operations remain consistent with entry permit terms and that acceptable entry conditions are maintained.
Determine if entry into confined space is necessary to perform work.
The following minimum required equipment should be on hand:
Barrier and warning signs
Gas monitor capable of measuring concentrations of oxygen, flammable gases, hydrogen sulfide and carbon monoxide.
Eliminate any unsafe conditions before the access door or cover is opened.
Test the real or potential atmospheric hazards
Oxygen content less than 19.5% or greater than 23.5%
Flammable gases and vapors greater than 10% of the LEL (Lower Explosive Limit)
Hydrogen Sulfide concentrations greater than 10 ppm (Parts per million)
Carbon Monoxide concentrations greater than 35 ppm
- Heat stress
- Entrapment hazards
Is there any hazardous atmosphere detected?
Determine and eliminate the source of the atmospheric hazards (for example: carbon monoxide from nearby truck or gas-powered generator).
When the atmosphere contains toxins or flammables, ventilate the space by drawing air out until the air has been changed over several times.
When oxygen deficient, ventilate by pushing air into the space until the air has been changed over several times.
Verify the hazardous atmosphere has been eliminated by testing the air.
- Non-Permit Space
- Alternative Entry Procedures
- Permit-Required Space
- 49. Non-Respirable Atmospheres
Notify affected departments of service interruption.
Lock-out/tag-out all sources of energy (e.g. steam, electric, mechanical) posing a risk to workers.
Install blank in affected pipes where valves are not secure or seated.
Clean and/or purge any chemical storage vessel.
Wear appropriate personal protective and respiratory protection.
Have lights and or ladder available.
If coordination is needed with contractors, see Contractor Checklist.
Have appropriate MSDS's (Material Safety Data Sheet).
Determine how often air monitoring will be conducted.
Full Name and Signature of Entry Supervisor/Authorized Personnel