Final answer:
The primary responsibility of the Designated Employer Representative (DER) is to ensure compliance with the Department of Transportation (DOT) regulations regarding drug and alcohol testing in the workplace.
Step-by-step explanation:
The primary responsibility of the Designated Employer Representative (DER) is to ensure compliance with the Department of Transportation (DOT) regulations regarding drug and alcohol testing in the workplace.
The DER is responsible for implementing and maintaining the DOT drug and alcohol testing program, which includes developing and enforcing policies and procedures, conducting training for employees, and monitoring program compliance.
Additionally, the DER serves as the main point of contact with the DOT, manages the drug and alcohol testing process, and handles any issues or violations that may arise.