Controlled Substance And Alcohol Testing40, Procedures for Transportation Workplace Drug and Alcohol Testing Programs. Medical Review Officer A carrier must use a Medical Review Officer (MRO) to review and verify individual controlled substance test results. … Retrieve Full Source FRA Alcohol/Drug Training ANSWERS TO QUIZAlcohol concentration of any measureable amount. 7. Prior to a Federal random drug test, the collector must ask the donor to remove which of the following: … Fetch Doc Read ...