R 408.17241 Radiators and gas tanks.

Rule 7241. (1) A radiator cap shall not be removed until the pressure has been relieved. (2) Where radiators are repaired and cleaned by use of caustic solutions, the employee shall be protected by boots, gloves, rubber apron, safety glasses and face shield. A deluge water supply at a fixed location shall be available within 25 feet of the hazard source. This equipment shall be posted: "Emergency Shower." (3) When the top of an open tank or vat containing a hazardous substance is less than 36 inches from the floor, platform or ground level, a barrier shall be erected to a height of not less than 36 inches on all exposed sides. (4) Gasoline tanks shall be thoroughly evacuated and maintained free of all explosive vapors or gasoline before commencing welding or soldering repairs.