Ok, so I did some poking around and found out some info. The type of test they do for federal/military jobs is a gas spectrometer test. What that sums up as, you have to be clean. No matter what you use to try and cover it they will find out. Thats the bummer part, the good thing is that your tolerance will drop through the floor. Your already at 22 days so just keep going strong. If you have access to a sauna you might want to spend a few hours in there too. A friend of mine is active duty Marines and he smoked daily and went and spent 5 hours in a sauna (1 day) at 1 hour intervals and drank like a gallon and a half of water and he pissed clean the next day.