1) Pre-Employment---no previous negative drug test on ﬁle.
2) Random Test Selection---employee was randomly selected during testing period.
3) Post-Accident---required for fatality, moving violation citation with disabled vehicle or moving violation citation and medical treatment for anyone away from accident.
4) Reasonable Suspicion—as determined for testing by supervisor.
5) Return-To-Duty---required testing from previous positive test.
6) Follow-Up---required additional random testing after employee returns back to duty.