The concentration of alcohol ( ethanol ) levels are measured in parts per million ( thousandths ).
Alcohol reaches its maximum concentration after about half an hour after eating.
The results of calculations can not be evidence in court, as well as serve as a basis for challenging such as methods for determining the laboratory analysis or breathalyzer device. Calculation is conducted using mean values. Remember that the speed of intoxication and withdrawal of alcohol from the body of each person individually.