(29 CFR 1926) Subpart S – Underground Construction, Caissons, Cofferdams and Compressed Air

Published on:

January 7, 2026

Published in:

1926.800 Underground construction

(d) Safety instruction. All employees shall be instructed in the recognition and avoidance of hazards associated with underground construction activities including, where appropriate, the following subjects:

(1) Air monitoring;

(2) Ventilation;

(3) Illumination;

(4) Communications;

(5) Flood control;

(6) Mechanical equipment;

(7) Personal protective equipment;

(8) Explosives;

(9) Fire prevention and protection; and

(10)Emergency procedures, including evacuation plans and checkin/check-out systems.

(g) Emergency provisions

(5) Rescue teams.

(iv) On jobsites where flammable or noxious gases are encountered or anticipated in hazardous quantities, rescue team members shall practice donning and using selfcontained breathing apparatus monthly.

1926.803 Compressed air

(a) General provisions

(2) Every employee shall be instructed in the rules and regulations which concern his safety or the safety of others.

(e) Compression

(1) Every employee going under air pressure for the first time shall be instructed on how to avoid excessive discomfort.

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