Yes and that is part of the 'medical' and not a drugs test
There was a question some time ago as to whether or not the urine sample you give at ADSC could be used to screen in advance the amount of applicants coming into the Army that had been taking drugs, the idea being if they found someone to be positive they could then hit them with CDT in phase 1 and get rid of them rapidly, but it is neither legal nor is it cost effective.
To be fair to the OP - I spent the weekend at a music festival (Isle of Wight) and despite all the police sniffer dogs there was a hell of a lot of weed being smoked. Pretty much everywhere in the crowd, then back at the campsites etc
I guess if you didn't feel the effects then you wouldn't have inhaled enough to be found in your urine though?
This is nonsense-its not like you've been hotboxing a sealed room with 3 Rastas, its someone smoking a joint 20' away outside, the concentration will be so low you'll never even notice it...its not nerve agent FFS! Unless you have been at the ganj yourself, in which case bad boy, not suitable for military life...
As long as you werent in an enclosed space at the time with plenty being smoked around like a Tent etc nothing will show up. Wouldnt really worry about it too much i have to deal with it a lot since quite a few people i know have some for medicinal use i.e Family member has recently been fighting breast cancer and hte tablets are taking a toll
they ask you if you have been in "contact" or taken drugs before the test,,, if you where around smoke it WILL show,,,, the answer you give is recorded on the bottle ect and plays a big part on there answer...