What should be used to control atmospheric hazards first before using respirators?

Using engineering controls to manage atmospheric hazards is essential because these measures are designed to eliminate or reduce the hazards at the source before relying on respiratory protection. Engineering controls can include ventilation systems, process modifications, or enclosure of hazardous operations that help to lower exposure levels to harmful substances.

This proactive approach is preferred because it not only protects workers but can also create a safer work environment overall. By controlling the hazard at its source, the reliance on personal protective equipment such as respirators can be minimized, and the effectiveness of protective measures is greatly enhanced.

In contrast, while personal protective equipment provides a barrier between the worker and the hazard, it does not eliminate the hazard itself. Workplace safety policies and administrative controls can guide behavior and practices, but they often depend on worker compliance and may not sufficiently reduce hazardous exposures on their own.