Urine and saliva.: Urine toxicology screens are quite common, though some now use saliva tests which are less prone to deceptive behavior. Some employers also use hair analysis, which looks back over a longer period of time and almost eliminates any potential for deception.
Answered 8/30/2016
5.8k views
Urine primarily: followed by saliva and hair testing.
Answered 12/23/2015
3.9k views
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