VO Voluntary (member consent) (collection code) Section II Terms Adulterated specimen A urine specimen containing a substance that is not a normal constituent or containing an endogenous substance at a concentration that is not a normal physiological concentration. Air blank A reading by an evidentiary breath test of ambient air containing no alcohol. Alcohol abuse Any irresponsible use of an alcoholic beverage which leads to misconduct, unacceptable social behavior, or impairment of an individual’s performance of duty, physical or behavioral health, financial responsibility, or personal relationships.