When should a user conduct a fit test for their SCBA?

Conducting a fit test for a Self-Contained Breathing Apparatus (SCBA) is crucial for ensuring that the equipment provides an adequate seal and protection for the user. The correct timing for this test is before initial use and then annually thereafter. This approach guarantees that the SCBA fits properly when the user first puts it on and maintains its effectiveness over time.

Initial fit testing is essential because it determines whether the SCBA is suitable for the specific user’s facial structure, ensuring that the mask will provide the necessary protection against harmful airborne contaminants. Conducting the test annually helps to account for any physical changes that may occur in the user's face due to weight fluctuations, aging, or other factors that can affect the fit.

Periodic fit testing as described in this option is also a standard practice outlined in safety regulations and guidelines, reinforcing its importance for maintaining safety protocols in hazardous environments. This systematic approach ensures that users remain protected each time they use their SCBA, thereby enhancing their safety and effectiveness in emergency situations.