One section in the report raised issue with a lack of adjustment of a person's breath temperature.
Breath temperature can fluctuate throughout the day, but, according to the report, can also wildly change the results of an alcohol breath test. Without correction, a single digit over a normal breath temperature of 34 degrees centigrade can inflate the results by six percent -- enough to push a person over the limit.
The quadratic formula set by the Washington State Patrol should correct the breath temperature to prevent false results. The quadratic formula corrects warmer breath downward, said the report, but the code doesn't explain how the corrections are made. The corrections "may be insufficient" if the formula is faulty, the report added.
Issues with the code notwithstanding, Washington chose not to install a component to measure breath temperature, according to testimony in a 2015 hearing, and later confirmed by Draeger.