The results of the breath, blood or urine test will largely determine the charges brought and the possible sentences.  The so-called "per se" offense (driving over .08%) is defined by the blood-alchohol level; the "DWI" offense (driving while intoxicated) is partially proven with a rebuttable presumption of intoxication if the result is over .08%.

It is important to realize that the DWI laws relate to the blood-alchol level AT THE TIME OF DRIVING - not at the time of the test; there may be a significat difference, not to mention difficulties of proof.  It is also important to understand that tests - particularly reath tests - are unreliable and susceptible to attack by an attoreny who is knowledgable in the science of blood-alchol analysis.

Alcohol and the Human Body
A good basic discussion of the physiological process of alchol absorption and elimination, the alcohol levels of various drinks and the effects of food, tolerance, gender, etc.

How Alcohol Works
Discussion of the nature of alcohol, its metabolism and effects, by Dr. Craig Feudenrich.

Online Blood-Alcohol Calculator
A simple online questionnaire to determine your theorectical blood-alcohol level with different amounts of alcohol consumed, from the manufacturers of the Intoximeter breath analyzing machine.

"Why Breath Tests of Blood-Alcohol Don't Work"
Article by Dr. Michael Hlastala, professor of pulmonary medicine at the University of Washington.