Silica medical surveillance is one of the most commonly missed obligations in OSHA’s construction silica standard. Contractors usually focus on the engineering side: water on the saw, vacuums on the grinder, and Table 1. The medical side, under 29 CFR 1926.1153(h), gets overlooked until an inspection asks for exam records that do not exist.
This guide explains exactly who needs silica medical surveillance, what each exam must include, the 30-day deadlines, what medical information the employer is and is not entitled to see, and the gaps that most often lead to citations.
Who Needs Silica Medical Surveillance
The trigger is respirator use, not exposure alone. Under the silica standard for construction, employers must make medical surveillance available, at no cost and at a reasonable time and place, to each employee who will be required under the standard to use a respirator for 30 or more days per year.
Three details decide who is covered:
- Any part of a day counts. OSHA’s guidance states that if a respirator is required at any time during a day, regardless of how long, that day counts as one day toward the 30-day threshold.
- The trigger is forward-looking. The rule covers employees who will be required to wear a respirator 30 or more days a year, so plan based on upcoming work, not only past days.
- Table 1 drives many respirator days. For several Table 1 tasks, respirator requirements depend on how long the task runs in a shift or whether it is done indoors. Crews that regularly cut, grind, or chip concrete and masonry can cross 30 days quickly.
| Scenario | Counts as a day? | Why |
| Respirator required for 20 minutes of a 10-hour shift | Yes | Any required use during a day counts |
| Respirator worn voluntarily, not required by the standard | No | Only required use counts toward the trigger |
| Task done with engineering controls that make a respirator unnecessary under Table 1 | No | No respirator required that day |
| Crew scheduled for 8 weeks of indoor concrete grinding next quarter | Plan for surveillance | The trigger covers anticipated use |
What the Silica Medical Exam Must Include
The standard specifies the exam contents. All exams must be performed by a physician or other licensed health care professional (PLHCP).
| Component | Initial exam | Periodic exam | Key detail |
| Medical and work history (silica, dust, other respiratory exposures, respiratory symptoms, TB history, smoking status) | Yes | Yes | Past, current, and anticipated exposure |
| Physical exam with emphasis on the respiratory system | Yes | Yes | |
| Chest X-ray | Yes | Yes | Interpreted by a NIOSH-certified B Reader using ILO classification |
| Pulmonary function test (FVC, FEV1, FEV1/FVC) | Yes | Yes | Given by a technician with current NIOSH-approved spirometry certification |
| Test for latent tuberculosis infection | Yes | No | Required at baseline only |
| Other tests the PLHCP considers appropriate | As needed | As needed |
Two credential requirements trip up many providers: the X-ray must be read by a B Reader, and spirometry must be performed by a certified technician. An exam missing either does not meet the standard, even if the worker was seen.
Silica Medical Surveillance Deadlines
| Step | Deadline under 1926.1153(h) |
| Initial (baseline) exam | Within 30 days after initial assignment, unless the worker had a qualifying exam in the last three years |
| Periodic exam | At least every three years, or more often if the PLHCP recommends |
| PLHCP’s written report to the employee | Within 30 days of each exam |
| PLHCP’s written opinion to the employer | Obtained within 30 days of the exam; the employee also receives a copy within 30 days |
| Specialist exam, if recommended | Made available within 30 days after the employer receives the written opinion |
A specialist referral is recommended when the chest X-ray is classified 1/0 or higher by the B Reader, or when the PLHCP considers it appropriate. The standard defines a specialist as a physician board certified in pulmonary disease or occupational medicine.
What the Employer Must Provide, and What It Receives
Before the exam, the employer must give the PLHCP a copy of the standard and a description of the worker’s former, current, and anticipated duties and silica exposure levels, the PPE used or to be used and for how long, and information from prior employment-related medical exams in the employer’s control.
After the exam, the employer’s information is deliberately limited. The written opinion to the employer contains only:
- The date of the exam
- A statement that the exam met the standard’s requirements
- Any recommended limitations on respirator use
Recommended limits on silica exposure and a specialist referral recommendation go to the employer only if the worker gives written authorization. Employers should not request full exam results. Keeping the medical detail with the provider protects worker privacy and keeps the employer out of decisions it has no basis to make.
How Silica Surveillance Fits With Respirator Clearance
Silica medical surveillance is separate from the respirator medical evaluation required under OSHA’s respiratory protection standard before a worker is fit tested or uses a respirator. The two often happen together, but they answer different questions: whether the worker can safely wear a respirator, and whether silica exposure is affecting their health.
Coordinating both in one visit, along with respirator fit testing, saves crews a second trip. For a broader view of every OSHA surveillance obligation, see our guide to OSHA medical surveillance requirements.
OSHA has also made clear that offering surveillance is not the end of the obligation. Workers must be trained on the purpose and description of the medical surveillance program. A worker may decline silica surveillance, but a worker who has not been medically cleared cannot use a respirator, and so cannot be assigned work that requires one.
Recordkeeping
Silica medical surveillance records are employee medical records under OSHA’s access-to-records rule, 29 CFR 1910.1020, and must be kept for the duration of employment plus 30 years. Keep the written medical opinions, exposure data, and training records organized by worker so they can be produced quickly during an inspection or a customer audit.
Common Silica Surveillance Gaps on Construction Sites
- Nobody counts respirator days. Without a log of required respirator use by worker, no one knows who crossed 30 days.
- Missing credentials. X-rays not read by a B Reader, or spirometry by an uncertified technician.
- No TB test at baseline. The latent TB test is part of the initial exam and is often left out.
- Missed 30-day windows. New hires and transfers start respirator work before a baseline exam is offered.
- Employer collecting too much. Requesting full X-ray or spirometry results instead of the limited written opinion.
- Subcontractor blind spots. Each employer is responsible for its own workers, but a general contractor can still face scrutiny on a multi-employer site. See our guide for Texas general contractors.
What Getting Silica Surveillance Right Saves
- Citation exposure. Missing exams and records are straightforward for an inspector to verify, and OSHA’s maximum penalty for a serious violation exceeds $16,000 per violation, adjusted annually.
- Duplicate exams. Tracking qualifying exams from the last three years avoids repeating baselines for experienced hires.
- Crew downtime. Combining surveillance, respirator clearance, and fit testing in one visit, or on site, keeps crews working.
- Worker health. Silica-related lung disease is irreversible. Early detection gives the worker and the employer the chance to act before it progresses.
How Occucare Supports Silica Medical Surveillance
Occucare International runs OSHA medical surveillance programs built to the requirements of 1926.1153, with board-certified occupational medicine physicians reviewing every exam and issuing written opinions that respect the standard’s privacy limits. We coordinate pulmonary function testing, respirator clearance, and fit testing in a single visit, and our mobile testing units can bring baseline and periodic exams to your job site.
From our Houston headquarters and a network of 3,000+ vetted clinics, we support construction contractors across Texas, nationally, and internationally.
Frequently Asked Questions
Who needs silica medical surveillance in construction?
Under OSHA 29 CFR 1926.1153(h), employers must make medical surveillance available, at no cost, to each employee who will be required by the silica standard to use a respirator for 30 or more days per year. OSHA counts any day on which a respirator is required, for any length of time, as one day toward that threshold.
What does a silica medical exam include?
The initial exam includes a medical and work history, a physical exam focused on the respiratory system, a chest X-ray interpreted by a NIOSH-certified B Reader using the ILO classification, a pulmonary function test given by a technician with a current NIOSH-approved spirometry certificate, a test for latent tuberculosis infection, and any other tests the examining provider considers appropriate. Periodic exams repeat these except the TB test.
How often are silica medical exams required?
An initial exam must be made available within 30 days of initial assignment, unless the worker had an exam meeting the standard’s requirements within the last three years. Periodic exams must be offered at least every three years, or more often if the examining provider recommends it.
What medical information does the employer receive?
The employer receives a limited written medical opinion: the date of the exam, a statement that it met the standard’s requirements, and any recommended limitations on respirator use. Limitations on silica exposure and a specialist referral recommendation are shared with the employer only if the employee gives written authorization.
Can a worker decline silica medical surveillance?
The employer must offer it, and OSHA has said merely offering it does not end the employer’s obligations: workers must also be trained on the purpose of the program. Silica surveillance itself is offered, not forced, but a separate respirator medical evaluation is required before any worker can be fit tested and use a respirator.
Get Your Silica Surveillance Program Audit-Ready
Occucare will help you identify which workers cross the 30-day threshold, schedule compliant baseline and periodic exams, and keep records ready for any inspection. Request a silica medical surveillance consultation.
