What a DOT alcohol test looks like
- Screening test. The employee blows into the device. A result under 0.02 ends the test.
- Waiting period. If the screen is 0.02 or higher, there is a 15-minute wait with no eating, drinking or smoking.
- Confirmation test. A second test on an EBT, started within 30 minutes of the screen. The confirmation result is the one that counts.
Under FMCSA rules, a confirmed result of 0.02 to 0.039 means the driver is off safety-sensitive work for at least 24 hours. A result of 0.04 or higher is a violation and starts the return-to-duty process.
Why the equipment matters
DOT confirmation tests have to be done on an evidential breath tester from NHTSA's conforming products list, operated by a qualified technician. We bring our own EBT, so screening and confirmation happen in the same visit without sending anyone to a second location.
When employers use it
- Post-accident, inside the 2 and 8 hour windows
- Reasonable suspicion, after a supervisor's call
- Random alcohol tests, before, during or right after safety-sensitive work
- Return-to-duty and follow-up tests
- Company-policy tests for non-DOT employees
Records
Every DOT test is recorded on the DOT alcohol testing form, with printed results attached. Non-DOT tests follow your policy and forms. Results go to your designated employer representative.
Questions
What is the difference between a screening and a confirmation test?
The screening test is the first sample. If it shows 0.02 or more, a confirmation test on an EBT follows after a 15-minute wait. Only the confirmation result is used for DOT decisions.
Can you do breath alcohol testing without a drug test?
Yes. Alcohol testing can be booked on its own or alongside a drug collection.
Who is qualified to do a DOT breath alcohol test?
A breath alcohol technician trained and proficient under 49 CFR Part 40. FieldReady is run by a certified BAT who also trains other BATs.