I had 2 glasses (about 14oz) of wine. When should l be clear of a 500mg/mL cutoff? I understand that EtG can be detected up to 80 hours, but that is under rare circumstances. Would the EtG be clear by 24 hours?

Actually, it's not under "rare circumstances," it is the norm. There are a lot of variables at play here.

What do you stand to lose should you fail? Was it worth it if you fail?