I work for a large waste company which is a fortune 200 company. What they do is if your picked for a random they will have you clock in and then either send you to the lab or a supervisor will take you to the lab. I always walk in to work every day with my quickfix in my pocket. Like my american express card I never leave home without it. If they don't send me after I get to work then there not going to because they won't let you work till you go take the test so it has to happen when I get there and before I hit the shop floor to work.