Because evidential alcohol test devices such as the Alco-Sensor IV and Alco-Sensor FST give numerical results, the operator and program administrators must be able to interpret the numerical test results to know what action might be necessary.
| Result | Consequences | Physiological Effects |
| .02% | Workplace / DOT:Immediately removed from safety-sensitive duty. | May impair complex tasks requiring divided attention, slight euphoria and loss of shyness. Depressant effects are not apparent. Mildly relaxed and maybe a little lightheaded. |
| .04% |
Workplace / DOT:Immediately removed from safety-sensitive duty, receive education and/or treatment, subject to return-to-duty and follow-up testing. |
Feeling of well-being, relaxation, lower inhibitions, sensation of warmth. Euphoria. Some minor impairment of reasoning and memory, lowering of caution. Behavior may become exaggerated and emotions intensified (good emotions are better, bad emotions are worse). |
| .05% | Law Enforcement: Legal limit for drunk driving in many European countries. | Judgment is somewhat impaired; people are less able to make rational decisions about their capabilities, for example driving |
| .08% | Law Enforcement: Legal limit for drunk driving in all 50 states | Definite impairment of muscle coordination and driving skills, increased risk of nausea and slurred speech, Legal Limit in all 50 states |
| .10% | Significant impairment of motor coordination and loss of good judgment. Speech may be slurred; balance, vision, reaction time and hearing will be impaired. | |
| .15% | Balance and movement are impaired. Risk of blackouts, accidents, nausea, passing out, and hangovers. | |
| .30% | You have little comprehension of where you are. You may pass out suddenly and be difficult to awaken. | |
| .40% | Most people pass out; death may occur. |