How long does alcohol stay in your system? For a U.A. that get's sent to California?

So, I drank three days ago ( like 5 beers ) and have a u.a. tomorrow, the kind they send out to a lab in Ca. It tests for ETG or something I've heard? Please no lectures, I've already beat myself up bad enough about it. Just someone who's maybe been through it or is in the medical field who know's for sure. Thanks