What is required when an employee's hearing test indicates a significant threshold shift?

When an employee's hearing test indicates a significant threshold shift, it is essential to re-evaluate the hearing conservation program and potentially make modifications. This requirement is rooted in the goal of ensuring the safety and health of employees exposed to noise levels that could affect their hearing.

A significant threshold shift suggests that the employee's hearing has deteriorated compared to previous tests, indicating that the current program may not be adequately protecting them. Therefore, it is necessary to review the effectiveness of the existing measures, such as engineering controls, administrative controls, and the use of personal protective equipment. Adjustments might include enhanced training, improved equipment, or more frequent monitoring to mitigate further hearing loss.

The other choices do not effectively address the proactive approach needed in response to a significant threshold shift. Immediate termination is not a typical requirement and could lead to unnecessary job loss. Mandatory hearing aids for all employees is not a blanket solution, as not every individual will require them based on their hearing status. Lastly, taking no action until symptoms appear does not align with the best practices in hearing conservation, as early intervention is critical in preventing additional hearing impairment.