If I drank 4 beers from 11am-5:30pm. Submitted a urine test at 4:30p the next day, will there still be traces?

A pre-employment screening is way different than a court ordered drug and alcohol screening which would be far more strict.

You should pass the pre-employment one... assuming you don't drink a gallon of water... if it's a court ordered random test... you will fail.