From what I understand consuming 4 or 5 units of alcohol a day for a two week period is enough to put you outside the limit for some of these tests. That is only a couple of large glasses of wine or a couple of pints of beer a day which is not what I would call "copious amounts", especially on holiday or at this time of year, or indicative of a problem. I wonder how many office staff (or indeed AMEs) consume more than that on their holidays or days off?