Combining Hearing and Breath Alcohol Testing on One Mobile Visit

Can one mobile visit cover both audiometric testing and DOT breath alcohol testing?

Yes, a single mobile visit can run both programs, but they stay procedurally separate the whole time. Annual audiograms under 29 CFR 1910.95 and DOT breath alcohol testing under 49 CFR Part 40 answer to different regulations, different document trails, and in most programs different staff roles, so "combined visit" means the same van and the same day on site, not one combined test or one shared record. The scheduling win is real: one trip covers two compliance obligations instead of two separate vendor visits, which matters most for employers running a on-site testing program across multiple shifts or multiple locations. The risk, if the two workflows get blurred, is a chain-of-custody or confidentiality problem on the BAT side, or a noise-exposure documentation gap on the hearing side. Keeping them on separate stations, separate forms, and separate staff assignments during the same visit avoids both.

Why keep the two tests procedurally separate even on the same day?

Breath alcohol testing under Part 40 has chain-of-custody and confidentiality rules that audiometric testing does not: a trained breath alcohol technician (BAT) runs the test using an approved device, completes an Alcohol Testing Form in a specific sequence, and keeps the result separate from personnel files and from any other testing record collected that day. Audiometric testing has its own rules under 1910.95, including baseline comparison, STS calculation, and retention in the employee's medical record, but none of Part 40's testing-order or device-approval requirements apply. Running both programs through the same intake desk or the same paperwork folder risks mixing a DOT-regulated alcohol result with a non-DOT medical record, which creates a confidentiality problem under Part 40 Subpart P even if no one intended it. The fix is a separate check-in line, a separate technician, and a separate results folder for each program, even when both happen in the same room on the same day.

Who needs to staff the visit, and what do they each need to bring?

How should scheduling work so random BAT selection doesn't collide with audiogram release?

Random alcohol testing selections under 49 CFR 382.305 come from the employer's or consortium's random pool and have their own notification timing requirements independent of the audiogram schedule, so the two lists should be built and released separately even though both groups walk to the same van. A practical approach is staggering release: audiogram-only employees come first in scheduled blocks, then randomly selected drivers or safety-sensitive employees get pulled individually for BAT testing as their random notification goes out, not as part of the general group release. This keeps the random test's unpredictability intact, which Part 40 requires, instead of letting a published group schedule tip off who's being tested that day. Supervisors need both lists in hand before the van arrives, and the two lists should never be merged into one combined roster that a supervisor reads from, since that undermines the randomness requirement for the alcohol test.

What does a defensible records trail look like after a combined visit?

After the visit, the employer should have two records sets that never touch: audiometric results filed per 1910.95 (baseline comparisons, STS flags, retention for the duration of employment plus the required period after), and alcohol testing results filed per Part 40 Subpart P confidentiality rules, with access restricted to the DER and specific authorized roles. An auditor reviewing the hearing conservation program should never need to see a BAT's Alcohol Testing Form, and a DOT compliance reviewer should never need to pull an audiogram. If both programs share a third-party vendor like Foster, ask the vendor to confirm in writing that results are delivered through separate channels, not bundled into one combined visit report, since a combined report is the single most common way the two record sets end up improperly mixed.

How Foster handles a combined hearing and BAT mobile visit

Foster schedules the audiometric technician and the breath alcohol technician as two separate staff assignments on the work order, even when both ride in the same van to the same site. Audiogram results go out through the standard hearing conservation report with baseline comparison and any STS flags; BAT results go out through a separate, Part 40-compliant channel to the employer's DER only, never attached to the hearing report or copied to the same contact list. Random BAT selections are pulled from the employer's existing random pool and notified the same day, independent of the audiogram release schedule, so the two groups never appear on one combined sign-in sheet. Employers booking a combined visit should confirm this separation applies before the van is scheduled.

FAQ

Does combining the two tests on one visit violate Part 40 confidentiality rules?

Not if the workflows stay separate. Part 40 Subpart P restricts who can see an alcohol test result; it does not prohibit a BAT and an audiometric technician from working out of the same mobile unit on the same day, as long as the alcohol test result never gets filed with or shared alongside the audiogram.

Can the same technician run both tests?

Only if that person holds both qualifications, CAOHC certification or equivalent for audiometry and current BAT training under Part 40 for breath alcohol testing. Most mobile programs staff the two roles separately rather than cross-training one technician for both, since a BAT must also stay current on device-specific training for whichever EBT or ASD is in use.

Does a combined visit save money compared to two separate visits?

Usually yes on trip and travel fees, since one mobile dispatch covers both programs instead of two. Per-test pricing for the audiogram and the BAT test itself does not change; the savings come from the shared trip charge, not from the testing fee.

What happens if a DOT-covered employee is also due for their annual audiogram the same day?

Nothing special changes from that employee's perspective; they complete each test in sequence with the appropriate technician, and each result is filed under its own program's rules. The only coordination point is making sure their random BAT notification, if selected, is not delayed or combined with their audiogram appointment time.

Sources

• OSHA 29 CFR 1910.95, Occupational Noise Exposure
• eCFR, 49 CFR Part 40, Procedures for Transportation Workplace Drug and Alcohol Testing Programs
• eCFR, 49 CFR 382.305, Random Alcohol and Controlled Substances Testing

Related: Mobile hearing test day: what employers need to prep before the team arrives and EBT vs ASD: which alcohol screening devices DOT accepts. See Foster's hearing testing and BAT training services, or request a quote for a combined mobile visit.