24 hours it stays in! I work offshore and they test all the time
Most UA's will show alcohol for around 24 hours. However, if you have consumed a large amount of alcohol, and especially if you are still feeling the effects, it could be longer. There are urine tests now that can detect alcohol for around 80 hours. Again, amount of consumption can affect the number of hours.
Depending on the amount of alcohol consumed, alcohol can stay in the system for up to 24 hours.
24 hours even my 10 year old cousin knows that, your weak dude