Stage II is the predominant sleep stage during a normal night's sleep. The distinct and principal EEG criterion to establish stage II sleep is the appearance of sleep spindles or K complexes. The presence of sleep spindles is necessary and sufficient to define stage II sleep.
After 5 hours â your BAC would be 0.005. Alcohol would be eliminated from the body at about 5 hours and 20 minutes (the body metabolizes alcohol at the rate of about 0.005 per twenty minutes, as 0.005 x 3 = 0.015). So it is easy to tell when your body will be free of alcohol.
Thus, if your BAC is 0.030, it would take 2 hours to have all the alcohol leave your system. Some breathalyzers are faulty and will give you inaccurate readings due to body temperature, acid reflux or a bloody mouth. Natural compounds, like ketones can be mistaken for alcohol in the blood stream also.