Who Belongs in Your Hearing Conservation Program?

Most enrollment lists we see at new customers are built from job titles. Production, maintenance, and shipping are on the list. Facilities, engineering, quality, and the contractor who visits four times a year are not. That is a reasonable guess about who is exposed, but it is not the test OSHA uses, and the gap between the two is where citations and missed baselines come from.

Who has to be enrolled in a hearing conservation program?

Under 29 CFR 1910.95, the hearing conservation program applies to every employee whose noise exposure equals or exceeds an 8-hour time-weighted average of 85 dBA. The test is exposure, not job title, department, or how often the person is on the floor. OSHA has been direct on this point. When asked how often an employee must be exposed before coverage applies, its answer in an interpretation letter was one word: one day. That means an engineer who visits a plant several times a year and is exposed at or above 85 dBA TWA belongs in the program. So does a part-time worker, and so does anyone who covers a shift on a noisy line. Once enrolled, the employee gets the full set of program elements: exposure monitoring, annual audiograms after a baseline, hearing protector availability, annual training, and the recordkeeping that goes with all of it.

How do you know who is at or above 85 dBA TWA?

You measure, and you keep the measurements. Job-title guesses fail in both directions. A maintenance technician who spends most of the day in a quiet shop may cross the threshold on the two hours spent beside a compressor. A machine operator with an enclosed booth may stay under it. Personal dosimetry follows the person, while area surveys with a sound level meter describe a location. Our post on dosimeters versus sound level meters covers when each one answers the question. Whichever you use, the practical rule is to enroll when the data is at or above 85 dBA or when you cannot show that it is below. Enrolling one extra person costs one audiogram a year. Missing one can mean a baseline that was never taken, and a baseline is the reference every later test is compared against.

Which employees get missed most often?

Group	Why they get missed	What to check
Occasional visitors and engineers	Not on the plant roster, exposure is a few days a year	Exposure on the days they are on the floor
Temporary and contract workers	Payroll belongs to an agency	Written agreement on who tests and who keeps records
Maintenance and facilities	Exposure comes in bursts near equipment	Dosimetry across a full shift, not a spot reading
Supervisors and quality staff	Walk the floor but sit in an office	Time spent in the noisiest areas
Second and third shift	Testing day is scheduled for first shift	Whether the mobile test day covers every shift

Temporary workers deserve their own note. Ownership of their testing is a common dispute, and we cover it in who owns hearing tests for temporary and contract workers.

When can an employee be removed from the program?

Removal has one clear path in OSHA's interpretation on removal criteria. An employee who has not been exposed at or above 85 dBA as an 8-hour TWA for the entire year following their last annual audiogram may be removed from the program. The clock starts at the last audiogram, and it requires a full year with no qualifying exposure, so a job change alone is not enough on the day it happens. A person who moves to the front office in March is still in the program until the following audiogram cycle shows a year without exposure. Removal does not erase obligations either. Under 1910.95(m), noise exposure measurements are kept for two years, and audiometric test records are kept for the duration of the affected employee's employment. Document the removal decision with the exposure data that supports it, because the file is the only proof you can show later.

What does an enrolled employee need, and by when?

• Baseline audiogram: within 6 months of first exposure at or above the action level, or within 1 year when a mobile test van is used, with hearing protectors worn in the interim.
• Annual audiogram: compared against the baseline to catch a standard threshold shift.
• Hearing protectors: made available at no cost to employees at or above the action level.
• Annual training: repeated each year for every enrolled employee.
• Records: exposure measurements for two years, audiograms for the length of employment.

How does Foster handle enrollment on a testing day?

Before we schedule a mobile hearing test day, we ask for the enrollment list and then ask who is not on it. The second question finds the engineer, the contract electrician, and the supervisor who has never had a baseline. We test everyone the employer identifies as exposed, record each person's exposure status against the roster, and flag anyone tested for the first time so the baseline date is correct from that day. Second and third shift employees get slots on the same visit rather than waiting for the next one. If you are building or auditing a list, our hearing testing and on-site testing pages describe how a visit runs, and you can start one through the quote form.

FAQ

Does a visitor who is on site twice a year need to be enrolled?

If the exposure on those days is at or above 85 dBA as an 8-hour TWA, yes. OSHA's interpretation says one day of exposure is enough to trigger coverage.

Can we skip audiograms for people who wear double protection?

No. Enrollment follows the employee's noise exposure. Protectors are one element of the program, not a substitute for the audiogram.

An employee transferred to a quiet job last month. Can we remove them now?

Not yet. OSHA's criterion is a full year without qualifying exposure after the last annual audiogram, so the employee stays enrolled until that year is documented.

Do we keep records after someone leaves the program?

Yes. Audiometric test records are kept for the duration of the affected employee's employment, and exposure measurements are kept for two years.

Sources

• OSHA, 29 CFR 1910.95 Occupational noise exposure
• OSHA interpretation: employees with occasional exposure above 85 dBA TWA must be included in the program
• OSHA interpretation: minimum exposure for inclusion in the program; removal criteria