Any person performing the position while under the influence of marijuana or any other illegal drug may constitute a threat to health or safety or in which a lapse of attention could result in injury, illness, or death, including without limitation a position that includes the operating, repairing, maintaining, or monitoring of heavy equipment, machinery, aircraft, motorized watercraft, or motor vehicles or handling of hazardous materials and/or waste as part of the job duties. The role of the Diesel Service Apprentice / Mechanic Intern is a part time position while enrolled at technical school established to provide the employee on-the-job training and observe the intern's technical competency, aptitude, and work attitude.