A First-Time Program at Ridgeway Metalworks
Ridgeway Metalworks stamps and welds sheet steel on two shifts. An 8-hour dosimetry survey of the 40-person production floor found 11 employees at 87–89 dBA TWA, 9 at 92–95 dBA TWA (including a welder with nine years' service), and the remaining 20 below 82 dBA. The plant has never had a hearing conservation program. The safety manager has budget for audiometric testing, a mobile testing van that visits twice a year, and hearing protectors, but does not want to "over-comply." A new maintenance mechanic starts Monday and will work in the 94 dBA area; the next van visit is five months away. The welder says he does not need protectors because he has worn foam plugs for years and has "never had a problem."
1. Which employees must be included in a hearing conservation program, and what must the program contain at a minimum?
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Who is covered. The action level is 85 dBA as an 8-hour TWA, so the 20 employees at 87–89 and 92–95 dBA must be covered. The 20 below 82 dBA need not be enrolled now, but they should be resurveyed if processes or equipment change.
Minimum elements (29 CFR 1910.95):
- Monitoring: representative personal dosimetry, with employees notified of results.
- Audiometric testing: valid baseline within 6 months of first exposure, then annual, at no cost, supervised by a professional.
- Hearing protectors: offered at no cost at 85 dBA, mandatory at 90 dBA, at least two types available, fitted and trained, attenuation evaluated.
- Training: annual, covering effects of noise, audiometric testing, and protector use and care.
- Recordkeeping and access: noise measurements at least 2 years, audiograms for duration of employment.
- STS follow-up, reevaluation of protection, and program review.
Judgment. "Over-compliance" is a false option: the survey already establishes the triggers, and the listed elements are not discretionary once 85 dBA is reached.
2. Can the new mechanic's baseline audiogram wait for the van visit in five months? What conditions attach?
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Timing. The baseline must be obtained within 6 months of the first exposure. A van visit at five months satisfies that deadline, so waiting is lawful - but it does not delay anything else. Because he starts in a 94 dBA area, he must be enrolled on day one, trained, and issued hearing protectors before his first exposure.
The quiet period. The baseline must be preceded by at least 14 hours without workplace noise exposure. That requirement may be met by wearing hearing protectors that reduce exposure to 85 dBA or below during the preceding period. Document which condition was used, because an audiogram taken after a noisy night shift will look worse than the true baseline.
The mobile-van extension. Testing may be delayed up to one year only when the testing service is a mobile van and the employee wears hearing protectors throughout the delay. That provision is a fallback if the visit slips; the five-month visit is the cleaner, better-documented path.
3. What is the employer's obligation regarding the welder, and does his claim of years of plug use change the analysis?
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Protectors are mandatory, not optional. At 92–95 dBA TWA the employer must require protector use, not merely offer it. His nine years of foam plugs and his "no problem" assertion do not create an exemption: self-report is not evidence of adequate protection, and long tenure is a reason to compare audiograms, not to relax the rule.
Required actions:
- Offer at least two types at no cost and allow him to choose.
- Train and observe insertion (roll, pull, hold, tug-test the seal) rather than assuming competence.
- Evaluate attenuation with the OSHA method: protected TWA ≈ TWA − (NRR − 7). If the result is not below 85 dBA, choose better protection or dual protection.
- Enforce use through the plant's disciplinary policy and document refusals.
- Compare current audiograms to baseline; if a standard threshold shift exists, refit, retrain, and consider referral.
Bottom line. Refusal to wear protectors where use is required is a compliance problem for the employer, not a matter of employee preference.