One other thing I would like to add is do you really thing DOT guys don't drink it up on a Friday night,,, sure they do,, alcohol will be out of their system on Monday. Pot on the other hand is stored in your fat cells for 30 days or longer, and can be found in your hair, so if a DOT guy smoked a joint on Friday night after work he would be absolutely sober "not high" the next morning,, BUT he could test positive for pot up to 30 days.

I always wonder what the completely bald, no hair cops that seem to be drinking massive amounts of water are up to LOL.