Let us backtrack this «little over the limit» and «not so serious» incident.
I will use the numbers in thousands, ie the limit is 0.2. Just to avoid a lot of 0.0xx.
He was apparently a little over the limit. Let’s say he tested 0.3. An adult burns off roughly 0.15 each hour. Stopped drinking (hopefully) 8 hours before duty. He was 1.2 + 0.3 = 1.5 8 hours before duty. That equals drunk 8 hours before duty.
You may fall asleep faster when under the influence, but your sleep quality is less.
There is a good chance he was feeling a bit under the weather when he went to work. And a bit dizzy since he was not sober.
I am a drinker so I know how I would have felt.
If the blood sample confirms the initial test, I don’t think this is a minor case. He either has an alcohol problem, or just had too much to drink the night before.
I think he is right where he should be, but the blood test should have been done by know.