Confined Space Hazard Evaluation and Classification Checklist

Employers must evaluate the workplace to find permit-required confined spaces (1910.146(c)(1)) and reevaluate when conditions change. Fill in one checklist per space. Nothing you check here is saved. For a guided version, try the permit-space decision tool.

Step 1: Is it a confined space?

• Large enough to bodily enter and perform work
• Limited or restricted means of entry or exit
• Not designed for continuous employee occupancy

If any box is unchecked, it isn't a confined space. Record the reason and stop.

Step 2: Permit-space hazards

• Contains or could contain a hazardous atmosphere (oxygen, flammable, toxic, dust)
• Contains material that could engulf an entrant
• Converging walls or tapering floor that could trap or asphyxiate
• Other serious hazard: moving parts, energy, heat, falls, falling objects, noise, biological

Step 3: Hazard details

• Atmospheric sources identified (process, residue, sludge, nearby equipment, the work itself)
• Energy sources and isolation points listed
• Engulfment sources and flows listed
• Physical hazards listed
• Openings, sizes and access method recorded (vertical or horizontal; depth)

Step 4: Classification

• Non-permit confined space (no hazard capable of death or serious harm)
• Permit-required confined space: full permit program
• Permit space using alternate procedures (atmospheric hazard only, controlled by continuous forced-air ventilation, data documented)
• Permit space that can be reclassified (no atmospheric hazard; all hazards eliminated without entry; written certification)

Step 5: Controls and communication

• DANGER sign posted at every entrance (permit spaces)
• Covers locked or barriers in place if no one will enter
• Space added to the inventory with its ID and classification
• Entry procedures, rescue method and equipment noted for permit spaces
• Contractors informed of the space and its hazards
• Reevaluation triggers noted (process change, new chemicals, modifications)

Last reviewed: October 25, 2026 · Free general education based on OSHA 29 CFR 1910.146 and 29 CFR 1926 Subpart AA. It does not replace the site-specific training, written program and hands-on evaluation your employer must provide, and it does not issue a certificate. Nothing you enter on this page is saved or sent.