Drug testing is required for all safety–sensitive employees. These tests are required for the following situations:

• Pre-employment, or before you start your job responsibilities.
• Reasonable suspicion/cause, when a trained supervisor reasonably believes/suspects that you are under the influence of drugs.
• Random testing, must be a truly random selection process. This is done through a consortium where a computer randomly generates employees’ names for testing. Random testing is performed quarterly.
• Return-to-duty testing, is required after a violation of the drug and alcohol rules. You cannot return to any DOT job before being tested and may be subject to unannounced testing in the first 12 months. These tests must be conducted under direct observation.
• Follow-up testing, conducted when an individual who has violated the alcohol conduct standards returns to performing safety-sensitive duties. Follow-up tests are unannounced. At least six tests must be conducted in the first 12 months after a driver returns to duty. Follow-up testing may be extended for up to 60 months following return to duty. These tests are completed in addition to other DOT-required testing.
• Post-accident testing, is required if you are involved in an accident. An alcohol test must occur within 8 hours of the accident, and a drug test within 32 hours.