Confined Space Hazard Assessment Checklist [FREE PDF]

Confined space hazard assessment is a mandatory prerequisite under OSHA 29 CFR 1910.146(c)(1), requiring employers to identify all confined spaces on site and evaluate each for permit-required characteristics including atmospheric, engulfment, and configuration hazards. Failure to properly assess confined spaces is among the most frequently cited OSHA violations and is directly linked to workplace fatalities. This checklist guides Entry Supervisors and Safety Managers through a systematic hazard

Industry: General Industry
Frequency: Per Event
Estimated Time: 45-60 minutes
Role: Confined Space Entry Supervisor
Total Items: 44
Compliance: OSHA 29 CFR 1910.146, NFPA 350 (2022 Edition), ANSI Z117.1-2017, CSA Z1006-16

Space Identification & Classification

Determine whether the space meets the OSHA definition of a confined space and classify it as permit-required or non-permit.

Is the space large enough for an employee to bodily enter and perform assigned work?
Does the space have limited or restricted means of entry or exit?
Is the space not designed for continuous human occupancy?
Has this space been officially classified and documented in the facility's confined space inventory?
Is the confined space classification placard or warning sign posted at the space entry point?
Please photograph the space entry point, including any posted signage?

Permit-Required Characteristics Evaluation

Assess whether any permit-required confined space (PRCS) characteristics are present per OSHA 1910.146(b).

Does the space contain or have the potential to contain a hazardous atmosphere?
Does the space contain a material that has the potential for engulfing an entrant?
Does the space have an internal configuration that could trap or asphyxiate an entrant (e.g., inwardly converging walls, floor sloping to smaller section)?
Does the space contain any other recognized serious safety or health hazard?
Based on criteria above, is this space classified as a Permit-Required Confined Space (PRCS)?

Atmospheric Hazard Assessment

Evaluate specific atmospheric hazards present or potentially present within the confined space.

Has the space been tested for oxygen concentration prior to entry?
Has the space been tested for flammable gases and vapors?
Has the space been tested for toxic contaminants including carbon monoxide, hydrogen sulfide, and other space-specific toxics?
Are potential sources of atmospheric hazards (pipelines, process equipment, biological decomposition) identified and documented?
Is continuous atmospheric monitoring required and planned for the duration of entry?
Document the specific toxic substances or gases identified and the detection equipment to be used?

Physical & Mechanical Hazard Assessment

Identify non-atmospheric physical hazards including engulfment, entrapment, mechanical, electrical, and thermal risks.

Have all mechanical hazards (rotating equipment, agitators, augers) been identified and isolated?
Have all electrical hazards been identified and isolated or de-energized?
Have thermal hazards (extreme heat, steam lines, cryogenic materials) been assessed?
Is there a risk of sudden flooding or ingress of liquids, steam, or other materials?
Are structural hazards (unstable walls, floors, corroded surfaces, excessive loads) present in or around the space?

Isolation, Lockout/Tagout & Purging

Verify that all energy sources are isolated and the space has been properly prepared for safe entry.

Has a written lockout/tagout procedure specific to this confined space been developed and implemented?
Have all energy isolation points been verified with a zero-energy verification check?
Have all inlet and outlet lines been blanked, blinded, or double-blocked and bled?
Has the space been purged, inerted, flushed, or ventilated to eliminate or control atmospheric hazards?
Has forced-air mechanical ventilation been verified as operational and properly positioned?
Photograph the isolation points, blinds, locks, and ventilation setup?

Entry Permit Requirements & Authorization

Confirm that all permit documentation requirements are met before entry is authorized.

Has a written entry permit been completed with all required elements per OSHA 1910.146(f)?
Are the names of authorized entrants, attendant(s), and entry supervisor documented on the permit?
Has the permit been posted at the entry point and communicated to all affected workers?
Has the entry supervisor reviewed and signed the permit, confirming all conditions are acceptable for entry?
Is a permit cancellation and reauthorization procedure in place for when conditions change during entry?

Rescue & Emergency Response Planning

Verify that rescue and emergency response capabilities are in place before entry commences.

Has a rescue and emergency services plan been developed and documented for this specific space?
Is non-entry retrieval equipment (tripod, winch, lifeline, harness) available and inspected at the entry point?
Has the designated rescue team or service been notified and confirmed as available for the duration of entry?
Has the attendant been briefed on emergency communication procedures and the rescue signal?
Is emergency rescue and first aid equipment (AED, oxygen resuscitator, first aid kit) staged at the entry site?
Have all entrants and attendants received site-specific confined space training and been verified as trained?

PPE & Equipment Verification

Confirm all required personal protective equipment and detection/communication equipment is available, inspected, and assigned.

Has all required PPE (respirators, harness, gloves, chemical protective clothing) been identified and issued?
Have all atmospheric monitoring instruments been calibrated within the manufacturer's recommended interval and bump-tested today?
Is supplied-air or SCBA respiratory protection available if the atmosphere cannot be made safe?
Is two-way communication equipment available and tested for entrant-to-attendant communication?
Has all equipment been documented on the entry permit with condition status noted?

Related Confined Space Safety Checklists

Related Permit Required Checklists

Why Use This Confined Space Hazard Assessment Checklist [FREE PDF]?

This confined space hazard assessment checklist [free pdf] helps general industry teams maintain compliance and operational excellence. Designed for confined space entry supervisor professionals, this checklist covers 44 critical inspection points across 8 sections. Recommended frequency: per event.

Ensures compliance with OSHA 29 CFR 1910.146, NFPA 350 (2022 Edition), ANSI Z117.1-2017, CSA Z1006-16. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Confined Space Hazard Assessment Checklist [FREE PDF] cover?

This checklist covers 44 inspection items across 8 sections: Space Identification & Classification, Permit-Required Characteristics Evaluation, Atmospheric Hazard Assessment, Physical & Mechanical Hazard Assessment, Isolation, Lockout/Tagout & Purging, Entry Permit Requirements & Authorization, Rescue & Emergency Response Planning, PPE & Equipment Verification. It is designed for general industry operations and compliance.

How often should this checklist be completed?

This checklist should be completed per event. Each completion takes approximately 45-60 minutes.

Who should use this Confined Space Hazard Assessment Checklist [FREE PDF]?

This checklist is designed for Confined Space Entry Supervisor professionals in the general industry industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.