well let me put it to u this way. I smoked twice in a week period, got blood tested two weeks later, and i was clean. but im a small guy who at the time worked out a shitload it was my life and my metabolism is extremely fast. . my advice to u would be to do what i did work out and I mean actuallly push yourself not pussy bench 1 time then leg press one time and maybe a few crunches here and there. if u really want to pass u can do it as long as u TRY. it also worked for my friend i made him work out with me 5 days a week and he got tested about 2.5 weeks later and he was also cleared.. if u dont sweat u wont win against the test.