R 408.10945 Safeguards.

Rule 945. (1) Where there is a possibility that an employee may be trapped in, or enter into, an atmosphere made hazardous by a carbon dioxide discharge, the following safeguards shall be provided: (a) Predischarge and discharge alarm. (b) Warning signs. (c) Employee training. (d) Self-contained breathing apparatus. (2) Where an alarm, audible or visual, is provided to indicate system failure, it shall be distinctive from an alarm indicating operation or hazardous conditions and shall operate continuously until manually shut off. (3) Before an employee enters an area where carbon dioxide has been discharged and may be trapped, the area shall be purged or the employee shall wear approved respiratory equipment.