i had to take a urine test a week (7 days) after i smoked and tested negative.
Excercise often to make yourself sweat, after smoking weed the THC traces are stored in your fat. DRINK WATER to flush out your system (10 cups a day) and piss, piss, and piss. Do not excercise for 2 days prior to your test. The first piss of your day (morning) contain the most toxins so if its possible, do not take the test in the morning. When taking the test, the beginning of your piss and the end of your piss are prone to hold more traces, so piss in the urinal first, then piss in the cup, and finally finish it off in the urinal.