ETG Urine Lab Test

I drank 2 beer today at 3pm. I have a probation ETG test on Monday at 3pm. That gives me roughly 96 hours to clear out my system. I’m not sure what the cutoff level is. Will I test negative for alcohol. PLEASE HELP! I’m very worried because I heard from a friend that he drank 2 beers on a Friday and failed his ETG test the following Monday. Roughly 72 hours after consumption.