I have a pre-emp drug test scheduled for tomorrow, PLanning to substitute. What are the chances of being observed on an initial drug test for a retail (in-store) position? I just found out the company doing my Pre-Emp drug test is LabCorp. I'm just wondering if there is any chance of being observed since I plan to Substitute? I checked LabCorps website and found this pertaining to observation..From this I'm assuming it's not standard procedure unless someone is suspected of adulteration...Am I correct? "Q. Does LabCorp perform direct observation collections? A. LabCorp follows all DOT and HHS rules to include direct observations in defined circumstances, including suspected adulteration."