Unforeseen hair follicle test (ETG) what are the odds?

Hi guys I’ve got a hair test coming up, My drinking history : teetotal till June, around 5 drinking epidoses in June (3 cans of gin tonic 5%an occasion), July 1 can the whole month August about 3 occasion, 2/3 a time, last occasion was 26th of August. Clearly haven’t been drunk or anything. What are the odds of me passing my hair test? It’s sometime September, I dont have an exact date

TIA