Ten common ways to contest BAC results in an alcohol-related driving case are: 1) The breathalyzer was not calibrated correctly; 2) The technician who maintained the breathalyzer let his/her certification lapse; 3) The police officer did not administer the chemical test within two hours of the defendant driving; 4) The police failed to observe the defendant for 15 minutes before taking the chemical breath test; 5) The blood test samples were contaminated; 6) The blood tests were mixed up with another defendant's blood tests; 7) The defendant suffered from GERD, acid reflux, or auto-brewery syndrome - which may cause an elevated BAC; 8) The defendant had dental work that caused any alcohol to pool and return an elevated BAC result; 9) The defendant had just taken a medication or mouthwash that contained alcohol; and/or 10) The high BAC result was due to rising blood alcohol.