Which of the following is NOT a requirement for exhaust systems to discharge to a common hazardous shaft?

The requirement that exhaust systems discharging to a common hazardous shaft must all be non-toxic is not accurate. While safety considerations regarding toxicity are important in the design of exhaust systems, not all exhaust systems necessarily have to ensure that all components are completely non-toxic.

In fact, a primary function of exhaust systems is to safely remove hazardous fumes, vapors, or particulates from environments where they are generated. Therefore, specific regulations may still allow for some level of hazardous discharge, provided that the systems are designed, maintained, and operated properly and do not pose an undue risk to the environment or human health.

On the other hand, discharging from laboratory areas, complying with fire safety codes, and maintaining proper ventilation are critical requirements to ensure that exhaust systems function safely and effectively. Each of these requirements contributes to minimizing the risks associated with hazardous materials and ensuring compliance with safety standards in public health and safety regulations.

Thus, while managing exhaust toxicity is a vital concern, stating that all exhaust systems must be non-toxic goes beyond standard regulatory requirements.