When I was a serving police officer and intoxylizer operator/trainer alcohol was ‘a colourless, oderless substance liquid at normal ambient temperature’ the security personnel who can smell alcohol on anyone’s breath hasn’t been born yet. Or this ones evidence has been miss reported. Given a regular drinkers accumulated tolerance over time I seriously doubt such a low level would actually be discernible.
still it has no valid place in the bloodstream of flight crew on the, or intending to be on the, flight deck any time soon.
be lucky
David