Tests for determining BAC level include breath, urine, and blood tests. Breath Alcohol Test is the most common test and can be done road side.
Many people think chemical test evidence is required to prove you were intoxicated or impaired. However, a police officer's testimony about your appearance and behavior when arrested can provide enough evidence alone to convict you, even without a chemical test. Refusing to take the tests is a crime and there will be consequences should you make this choice.