13 Aug Confined Space Entry – JSA

Confined Space Entry Job Safety Analysis (JSA)

Job / Task

Entry into confined spaces and permit-required confined spaces, including tanks, vessels, vaults, pits, manholes, sewers, silos, pipelines, process equipment, and similar spaces with limited or restricted entry or exit.

Purpose

This Job Safety Analysis (JSA), also known as a Job Hazard Analysis (JHA), identifies hazards associated with confined space entry and establishes controls to prevent atmospheric exposure, engulfment, entrapment, electrical or mechanical energy exposure, falls, heat stress, fire, and delayed or improper rescue.

Personnel Qualifications

Confined space entry shall be performed only under an established confined-space program by employees trained for their assigned duties. Permit-required confined space entry shall use designated authorized entrants, attendants, entry supervisors, and rescue services as required.

Employees involved in entry shall:

• Understand the hazards of the space and the controls required for safe entry.
• Know the signs, symptoms, and consequences of exposure to identified atmospheric and physical hazards.
• Understand the entry permit, acceptable entry conditions, communication methods, and evacuation criteria.
• Use atmospheric testing, ventilation, PPE, retrieval, communication, and other equipment for which they have been trained.
• Follow lockout/tagout, blanking, blocking, disconnecting, draining, purging, or other isolation procedures as applicable.
• Immediately exit when ordered, when an alarm activates, when prohibited conditions develop, or when symptoms of exposure occur.
• Never enter a confined space to perform rescue unless trained, equipped, and authorized as part of the designated rescue system.

Required PPE

PPE shall be selected based on the hazards identified for the specific space and may include:

• Hard hat.
• Safety glasses with side protection or chemical goggles as appropriate.
• Safety footwear.
• Work gloves or chemical-resistant gloves appropriate to the exposure.
• Protective clothing appropriate to chemical, biological, thermal, or physical hazards.
• Hearing protection where required.
• High-visibility apparel where exposed to traffic or mobile equipment.
• Full-body harness and retrieval equipment when required.
• Respiratory protection when required by the hazard assessment and respiratory-protection program.
• Fall-protection equipment where required.
• Additional task-specific PPE identified by the entry permit and hazard assessment.

JSA – Job Steps, Hazards, and Controls

Step 1 – Identify and Evaluate the Confined Space

Potential Hazards

• Unrecognized permit-space hazard.
• Atmospheric exposure.
• Entrapment or engulfment.

Required Controls

• Determine whether the work area meets the definition of a confined space.
• Evaluate whether the space contains or has the potential to contain a hazardous atmosphere, engulfment hazard, inwardly converging configuration, or other serious hazard.
• Classify the space in accordance with the confined-space program.
• Review previous permits, SDSs, process information, drawings, and known space hazards.
• Do not begin entry until the space and hazards have been properly evaluated.

Step 2 – Determine the Work Scope

Potential Hazards

• New hazards introduced by work.
• Inadequate controls.

Required Controls

• Define the work to be performed and tools, chemicals, equipment, and processes that will enter the space.
• Evaluate welding, cutting, coating, cleaning, electrical work, chemical use, and other tasks for hazards they may introduce.
• Determine required permits and supporting procedures.
• Coordinate simultaneous work inside and outside the space.
• Reevaluate the entry if the work scope changes.

Step 3 – Complete the Entry Permit

Potential Hazards

• Missing hazard controls.
• Unauthorized entry.

Required Controls

• Complete the required entry permit before permit-space entry begins.
• Identify the space, purpose, duration, entrants, attendants, entry supervisor, hazards, isolation methods, acceptable conditions, testing, ventilation, communication, rescue provisions, and required equipment.
• Verify required permits such as hot-work permits are completed.
• Have the entry supervisor verify and authorize entry before employees enter.
• Make the permit available to affected employees during entry.

Step 4 – Establish the Entry Work Zone

Potential Hazards

• Unauthorized entry.
• Traffic exposure.
• Falling objects.

Required Controls

• Barricade, guard, or otherwise control the entry opening.
• Protect entrants from vehicles, mobile equipment, pedestrians, and falling objects.
• Provide warning signs where appropriate.
• Maintain adequate space for attendant, rescue, ventilation, and retrieval equipment.
• Keep emergency access clear.

Step 5 – Shut Down and Isolate the Space

Potential Hazards

• Unexpected startup.
• Electrical shock.
• Mechanical movement.
• Material release.

Required Controls

• Shut down equipment and processes connected to the space.
• Apply lockout/tagout to hazardous energy sources as required.
• Blank, blind, disconnect, block, or otherwise isolate lines that could introduce hazardous materials or energy.
• Secure mechanical components against movement.
• Verify isolation before entry begins.

Step 6 – Drain, Depressurize, Purge, or Clean the Space

Potential Hazards

• Chemical exposure.
• Pressure release.
• Oxygen deficiency.
• Flammable atmosphere.

Required Controls

• Drain and depressurize the space and connected systems as required.
• Purge, flush, clean, or inert only under an approved procedure appropriate to the hazards.
• Control discharge and waste materials.
• Do not assume purging or cleaning has made the atmosphere safe; atmospheric testing is still required.
• Evaluate residues that may release vapors or gases during entry.

Step 7 – Provide Safe Access and Egress

Potential Hazards

• Falls.
• Entrapment.
• Delayed evacuation.

Required Controls

• Inspect ladders, stairs, hatches, platforms, and access points before use.
• Provide an approved means of entry and exit.
• Keep access openings unobstructed.
• Secure ladders and access equipment as required.
• Provide fall protection where employees are exposed to fall hazards at or within the space.

Step 8 – Inspect Entry and Rescue Equipment

Potential Hazards

• Equipment failure.
• Delayed rescue.
• Communication failure.

Required Controls

• Inspect atmospheric monitors, ventilation equipment, harnesses, retrieval systems, communication devices, lighting, PPE, and rescue equipment before entry.
• Verify equipment is suitable for the identified hazards and environment.
• Check calibration or functional status of atmospheric monitors according to manufacturer and program requirements.
• Remove defective equipment from service.
• Stage equipment so it remains accessible throughout entry.

Step 9 – Test the Atmosphere Before Entry

Potential Hazards

• Oxygen deficiency or enrichment.
• Fire or explosion.
• Toxic exposure.

Required Controls

• Test the internal atmosphere with a calibrated direct-reading instrument before entry.
• Test for oxygen content, flammable gases and vapors, and potential toxic contaminants in the required order.
• Test remotely from outside the space when possible before opening or entering.
• Sample different elevations and remote areas where atmospheric stratification may occur.
• Do not enter unless atmospheric conditions meet the established acceptable entry conditions.

Step 10 – Ventilate the Space

Potential Hazards

• Hazardous atmosphere.
• Inadequate air exchange.
• Exhaust contamination.

Required Controls

• Use forced-air ventilation when required to control atmospheric hazards.
• Supply clean air from an uncontaminated source.
• Position ducts to ventilate areas occupied by entrants and potential contaminant sources.
• Prevent equipment exhaust from entering the space or ventilation intake.
• Continue ventilation for the duration required by the entry conditions and permit.

Step 11 – Conduct the Pre-Entry Briefing

Potential Hazards

• Miscommunication.
• Entrant unaware of hazards or evacuation criteria.

Required Controls

• Review hazards, acceptable conditions, work scope, PPE, communication, alarms, evacuation criteria, and rescue procedures.
• Confirm the identity and responsibilities of entrants, attendant, and entry supervisor.
• Review changes from previous entries or permits.
• Verify all personnel understand stop-work authority.
• Resolve questions before entry begins.

Step 12 – Set Up the Attendant Position

Potential Hazards

• Unmonitored entrants.
• Unauthorized entry.
• Delayed emergency response.

Required Controls

• Station the attendant outside the permit space for the duration of entry.
• Ensure the attendant can effectively communicate with entrants.
• The attendant shall maintain an accurate count and identity of entrants.
• The attendant shall not perform duties that interfere with monitoring and protecting entrants.
• The attendant shall prevent unauthorized persons from entering and initiate required emergency actions.

Step 13 – Set Up Retrieval Equipment

Potential Hazards

• Delayed rescue.
• Entrant fall.
• Entrapment.

Required Controls

• Use non-entry retrieval systems when required and when they will not increase the overall risk.
• Have entrants wear an appropriate full-body harness when retrieval is required.
• Attach retrieval lines to the designated harness connection point appropriate to the entry configuration.
• Use a mechanical retrieval device for qualifying vertical permit spaces where required.
• Position retrieval equipment to permit prompt operation without obstructing access.

Step 14 – Enter the Confined Space

Potential Hazards

• Fall.
• Atmospheric exposure.
• Pinch or entrapment hazards.

Required Controls

• Enter only after the entry supervisor has authorized the permit.
• Maintain three points of contact on ladders where applicable.
• Use required harness, PPE, and retrieval equipment.
• Keep tools and materials controlled during entry.
• Maintain communication with the attendant.

Step 15 – Continuously / Periodically Monitor the Atmosphere

Potential Hazards

• Changing atmospheric conditions.
• Toxic exposure.
• Fire or explosion.

Required Controls

• Monitor atmospheric conditions at the frequency required by the permit and hazards.
• Use continuous monitoring where conditions can change rapidly or where required by the program.
• Monitor the entrant’s work area and other relevant locations.
• Maintain records of required atmospheric test results.
• Order evacuation immediately if acceptable entry conditions are not maintained.

Step 16 – Perform Work Inside the Space

Potential Hazards

• Heat stress.
• Ergonomic strain.
• Tool hazards.
• Atmospheric changes.

Required Controls

• Use only approved tools and equipment suitable for the space.
• Maintain ventilation and atmospheric monitoring.
• Control cords, hoses, and materials to preserve access and egress.
• Limit congestion and maintain adequate working room.
• Monitor employees for fatigue, heat stress, exposure symptoms, and changing conditions.

Step 17 – Use Electrical Equipment

Potential Hazards

• Electrical shock.
• Ignition of flammable atmosphere.

Required Controls

• Use electrical equipment suitable for the environment and hazard classification.
• Inspect cords, plugs, lights, and tools before use.
• Use required GFCI protection.
• Protect electrical connections from water, damage, and conductive surfaces.
• Do not use equipment capable of ignition where a flammable atmosphere may exist unless specifically approved for that environment.

Step 18 – Perform Hot Work

Potential Hazards

• Fire.
• Explosion.
• Welding fumes.
• Oxygen displacement.

Required Controls

• Obtain required hot-work authorization before beginning.
• Verify atmospheric conditions are acceptable before and during hot work.
• Provide ventilation adequate for fumes and gases.
• Control combustible materials and provide fire protection.
• Route compressed-gas cylinders and fuel-gas sources as required; do not introduce unnecessary cylinders into the space.

Step 19 – Use Chemicals / Coatings / Solvents

Potential Hazards

• Toxic vapors.
• Skin exposure.
• Fire.

Required Controls

• Review SDS information and evaluate chemical hazards before use.
• Use ventilation adequate to control vapors.
• Use required chemical-resistant PPE.
• Control ignition sources for flammable products.
• Limit the quantity of chemicals inside the space to what is necessary for the work.

Step 20 – Manage Heat Stress and Environmental Conditions

Potential Hazards

• Heat illness.
• Cold stress.
• Fatigue.

Required Controls

• Evaluate temperature, humidity, PPE, workload, and ventilation.
• Provide work/rest schedules, hydration, cooling, warming, or other controls as appropriate.
• Monitor entrants for signs and symptoms of heat or cold stress.
• Adjust entry duration when environmental conditions warrant.
• Evacuate affected employees promptly when symptoms occur.

Step 21 – Maintain Communication

Potential Hazards

• Delayed evacuation.
• Loss of entrant status.

Required Controls

• Maintain reliable communication between entrants and the attendant.
• Use voice, radio, hard-wired, visual, or other suitable communication methods.
• Test communication equipment before entry.
• Stop work and exit if required communication cannot be maintained.
• Ensure emergency communication with rescue and emergency services is available.

Step 22 – Control Entrant Numbers and Activities

Potential Hazards

• Overcrowding.
• Blocked egress.
• Uncontrolled hazards.

Required Controls

• Limit the number of entrants to what the work and rescue plan can safely accommodate.
• Maintain clear access to exits.
• Coordinate simultaneous tasks so one activity does not endanger another entrant.
• Keep unnecessary equipment outside the space.
• The attendant shall maintain entrant accountability throughout the entry.

Step 23 – Respond to Monitor Alarm or Prohibited Condition

Potential Hazards

• Toxic exposure.
• Fire or explosion.
• Asphyxiation.

Required Controls

• Entrants shall exit immediately when an atmospheric monitor alarms or a prohibited condition develops.
• The attendant shall order evacuation when required.
• Do not silence or disregard alarms to continue work.
• Reevaluate the space and identify the cause before reentry.
• Issue or revise the permit as required before entry resumes.

Step 24 – Respond to Entrant Symptoms or Distress

Potential Hazards

• Incapacitation.
• Asphyxiation.
• Delayed rescue.

Required Controls

• The attendant shall order immediate evacuation and summon rescue services.
• Initiate non-entry retrieval when feasible and safe.
• Do not allow untrained personnel to enter the space for rescue.
• Provide first aid or emergency medical response when the entrant is removed.
• Preserve information about atmospheric conditions and exposures for responders.

Step 25 – Initiate Rescue

Potential Hazards

• Multiple casualties.
• Rescuer exposure.
• Delayed response.

Required Controls

• Use the designated rescue service identified for the entry.
• Summon rescue promptly according to the entry plan.
• Use non-entry rescue whenever feasible and appropriate.
• Entry rescue shall be performed only by trained and properly equipped rescue personnel.
• Provide rescuers with information about the space, hazards, work performed, and atmospheric conditions.

Step 26 – Coordinate Outside Rescue Services

Potential Hazards

• Rescue service unable to perform timely or effective rescue.

Required Controls

• Verify before entry that the selected rescue service can respond in a timely manner appropriate to the hazards.
• Confirm the service is equipped and capable of performing the anticipated rescue.
• Provide access to the space for planning and practice as required.
• Inform the rescue service of known hazards.
• Maintain a reliable method for summoning the service during entry.

Step 27 – Exit the Space

Potential Hazards

• Fall during exit.
• Tools or materials left behind.
• Loss of accountability.

Required Controls

• Exit in a controlled manner using the designated access system.
• Maintain communication until all entrants are out.
• Account for every entrant.
• Remove tools and materials safely.
• Report any unusual conditions or symptoms to the entry supervisor.

Step 28 – Cancel / Close the Entry Permit

Potential Hazards

• Uncontrolled reentry.
• Failure to document hazards.

Required Controls

• The entry supervisor shall terminate entry and cancel the permit when work is complete or when prohibited conditions arise.
• Secure the space against unauthorized entry after work is complete.
• Document problems or unexpected conditions encountered during entry.
• Retain permits according to the confined-space program and applicable requirements.
• Use completed permits to support program review and improvement.

Step 29 – Restore Equipment and Energy

Potential Hazards

• Unexpected startup.
• Release of material.
• Personnel exposure.

Required Controls

• Verify all entrants, tools, and temporary equipment are clear.
• Remove blinds, blocks, locks, tags, or other isolation devices only under the applicable procedure.
• Restore systems in a controlled sequence.
• Notify affected personnel before reenergization or return to service.
• Verify guards, covers, and access points are restored.

Step 30 – Post-Entry Review

Potential Hazards

• Repeated hazards.
• Uncorrected deficiencies.

Required Controls

• Review unusual conditions, alarms, equipment problems, rescue concerns, and permit deviations.
• Correct deficiencies before the next entry.
• Update procedures, hazard information, or training when necessary.
• Report incidents and near misses according to applicable procedures.
• Communicate lessons learned to affected employees.

General Safe Work Requirements

• Confined spaces shall be evaluated before entry to determine whether permit-required confined space procedures apply.
• Permit-required confined space entry shall not begin until required isolation, atmospheric testing, ventilation, communication, rescue provisions, and entry authorization are established.
• Hazardous energy and material sources shall be isolated before entry as required.
• Atmospheric testing shall be performed with appropriate calibrated direct-reading instruments before entry and during entry as required.
• Acceptable atmospheric conditions shall be maintained for the duration of entry.
• An attendant shall remain outside the permit space and perform required attendant duties throughout entry.
• Entrants shall maintain communication with the attendant and immediately evacuate when ordered or when prohibited conditions develop.
• Required retrieval equipment shall be used unless it would increase the overall risk or would not contribute to rescue.
• A rescue service capable of timely and effective response shall be identified and available before permit-space entry begins.
• Untrained employees shall never enter a confined space to attempt rescue.
• Hot work, chemical use, electrical equipment, and other tasks that may introduce hazards shall be specifically evaluated and controlled.
• Safe access and egress shall be maintained throughout entry.
• Unauthorized personnel shall be prevented from entering the space.
• Entry shall stop when atmospheric monitoring, ventilation, communication, retrieval, isolation, rescue capability, or other required controls fail.
• The entry permit shall be canceled when entry is complete or prohibited conditions arise.

Training

Employees involved in confined space entry shall receive training appropriate to their assigned roles before performing entry duties and whenever changes or deficiencies require additional training. Training shall address confined-space recognition, permit-space hazards, entry permits, atmospheric testing, acceptable entry conditions, ventilation, isolation and lockout/tagout, PPE, communication, entrant and attendant duties, entry-supervisor responsibilities, retrieval systems, evacuation, rescue procedures, and task-specific hazards. Rescue personnel shall receive specialized rescue training and practice appropriate to the spaces they may be required to enter.

References

• OSHA 29 CFR 1910.146 – Permit-Required Confined Spaces, where applicable.
• OSHA 29 CFR 1926 Subpart AA – Confined Spaces in Construction.
• OSHA 29 CFR 1926.1203 – General Requirements.
• OSHA 29 CFR 1926.1204 – Permit-Required Confined Space Program.
• OSHA 29 CFR 1926.1208 – Duties of Authorized Entrants.
• OSHA 29 CFR 1926.1209 – Duties of Attendants.
• OSHA 29 CFR 1926.1210 – Duties of Entry Supervisors.
• OSHA 29 CFR 1926.1211 – Rescue and Emergency Services.
• Applicable site procedures, manufacturer instructions, client requirements, and respiratory-protection and energy-control programs.