What consequence may an employee face if they refuse a breath test when suspected of violating drug rules?

When an employee refuses a breath test after being suspected of violating drug rules, they face immediate removal from service. This action is typically taken to ensure safety and compliance with regulations that govern substance use in the workplace, especially in industries where safety is paramount, such as transportation or construction.

Removing an employee from service after a refusal to submit to testing acts as a deterrent against non-compliance and protects both the individual and the public from potential safety hazards that could arise from operating under the influence of drugs or alcohol. The principle behind this policy is to uphold a workplace culture that prioritizes safety and accountability, ensuring that all employees adhere to the established drug and alcohol policies.

The other options do not effectively address the severity of the situation. Dismissal from the workplace is a more immediate and serious consequence than simply providing a warning or requiring retraining, which would undermine the strict stance taken against substance violations in a safety-sensitive environment.