Within how many days must an employee and supervisor be notified about an STS?

The requirement to notify both the employee and the supervisor about a Standard Threshold Shift (STS) is set at 21 days. This timeframe is essential because it ensures that appropriate measures can be taken in a timely manner to address any potential hearing issues and to implement controls to protect the employee's hearing. The prompt notification allows for an effective response to any changes in hearing ability, which is critical for maintaining workplace safety and compliance with hearing conservation programs. The rationale behind this specific timeline emphasizes the importance of continual monitoring and swift action in safeguarding employees' auditory health.