DOT: Test are required for individuals and private corporations that are under contract with or under the authority of the Department of Transportation. DOT drug testing is done at laboratories certified by the Department of Health and Human Services . The Department of Transportation (DOT) also uses five panel urine drug tests. DOT truck drivers are required to undergo a drug test prior to employment, at least once randomly per year, after most accidents, and if reasonable suspicion exists that a driver is abusing drugs. The DOT 5 panel drug test checks for THC, Opiates, PCP, Cocaine, and Amphetamines.
NON-DOT: Drug tests are dictated by each individual employer. The employer decides how to manage and run their drug testing program based on their needs. Established companies have this defined in their drug testing policy. The timing and frequency is the employers choice, as is the type of testing. They could choose to test urine, oral fluid, hair, or a combination of the three after taking into account applicable legal regulations and considerations.