Select all that apply. The presence of any of these hazards classifies the space as a Permit-Required Confined Space (PRCS) under OSHA 1910.146(b), requiring a written permit before entry.
⚠️Toxic atmosphere (H2S, CO, solvents, vapours)
💨Oxygen deficiency (below 19.5%) or enrichment (above 23.5%)
🔥Flammable or explosive atmosphere
🌙Engulfment hazard (grain, liquid, loose material)
⚙️Unguarded mechanical hazards (augers, agitators)
⚡Electrical hazards (energised equipment)
🌡️Extreme heat or steam
⚠️Inwardly converging walls or sloping floor (entrapment)