yo, the facility knows your comming. they also know what your employer wants. id be prepared for 3 hrs. hearing test, vision test, touch your toes, look up down and around, ...and of course...turn your head and cough.

and yep, they will take a lotta blood. lotta blood. and they will want three samples of pee. they will want one sample for testing for blood in your piss...to eliminate chance of kidney problems...well its more of a screen.

then they will want the other two, 30 ml and 15 ml. that is for the pee test. its a 5 panel drug screen. dot is federaly regulated, so there is no chance they will hit you with anything other than a piss test. 99.9 % sure of that.

they cannot pat you down. they cannot request you be in a gown. however, if you are already in a gown for reasons pertaining to a "physical" it is well within their rights to make you piss then.

for humane reasons...they will do the pee tests first if you go in there and say your about to explode. if they say no, tell them its inhumane and you have to go really bad. if they say no, well leave and hire a lawyer.

your options are limited if you smoked within 24 hr. you want to substitute. you need clean pee. and freeze it till tomorrow AM. you need to devise a way to store it. after you take the pee test first, you will move on to other parts of the physical.

when your about to do the proverbial turn your head and cough, the doc will leave you alone to change in the gown, any one that does not should be asked to leave.

that is when you want to cleverly hide any evidence of fake pee. somewhere inside your clothing...but not your pockets...they can make you empty them. also, the doc will likely have you drop everything, so if there is an ace bandage around your leg, yep busted.

hope this helps. from my dot experience. also, you will be popped 4 times a year, randomly every three months. if you drive a cdl vehicle, or some companys do it anyway if you just drive like pickups [mine, and my reason for no more toke].