I had my last drink (Vodka) @ approx. 9pm 9/9/14. I have to take an etoh test on 9/12. I have taken water pills, drank approx. 1 gallon of green tea and had 1500 mg of niacin. Do I have a chance of passing?

Probibly not. You pretty much sealed you fate trying to cheat on the test.

What do you stand to lose if you fail? Is it a probation test? Employment?

Without knowing how much your binge was, it is hard to say what the value will be. For example if you only had 2 Vodka Slimes than you should pass. If you had a bottle of vodka then the answer might not be so positive.

How much did you drink? How many hours between the last drink and your test? Easy on the pills, tea and supplements there, too... Is this an ETG test for alcohol or a "standard" UA test?