§ 33.295. Removal of combustible materials.
(a) When working about sewer or gas mains, frequent tests for gas shall be made. Gas, when found, shall be cleared out, or thorough ventilation, artificial or natural, shall be provided before workmen are permitted to enter.
(b) When oil or other highly combustible material is encountered in an excavation, other work shall be stopped until the combustible material is removed.
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