Is 36 hours long enough to pass an ETG test if you only had 1 shot of vodka?

Not really a LOT of people will fail at that point.... what happens when you fail? Are you even attending AA or a comparable program? If you are worried about passing a test and still drinking.. you have a problem that needs addressing.

ETG is not like a breathalyzer which slowing fades to zero. It detects alcohol for up to 8- hours and then looses it effectiveness