16.3 Biological Monitoring and Medical Removal Protection
Key Takeaways
- Initial medical surveillance is blood lead and ZPP for employees occupationally exposed at or above the action level on any day. The full medical-surveillance program applies to employees exposed at or above the action level for more than 30 days in any consecutive 12 months.
- The 5-working-day clocks in 1926.62 are notifications after the employer receives results (air monitoring, and each employee's BLL in writing). Appendix B adds blood lead and ZPP prior to assignment for first-time assignment at or above the action level. Do not invent a 'draw blood on calendar day 5 of hire' sentence in (j).
- Construction medical removal: remove from work with exposure at or above the action level when a periodic and a follow-up blood test both indicate BLL ≥50 µg/dL. Return when two consecutive BLLs are below 40 µg/dL. Notify the employee at ≥40 µg/dL that MRP is required at the removal criterion.
- MRP benefits last up to 18 months on each removal: total normal earnings, seniority, and other employment rights as though the employee had not been removed, as long as the job continues.
- Do not use general-industry 60 µg/dL as the construction removal number. Do not confuse µg/dL blood with µg/m³ air or EPA's occupant EBL of 20 µg/dL.
50 / 40 / 18 months — construction blood lead, not EPA's EBL
Quick Answer: Initial medical surveillance under 1926.62(j)(1)(i) is blood lead and zinc protoporphyrin (ZPP) for employees occupationally exposed at or above the action level on any day. The full program in (j)(2) and (j)(3) is for employees exposed at or above the action level for more than 30 days in any consecutive 12 months. Remove an employee from work with exposure ≥ action level when a periodic and a follow-up blood test both indicate BLL ≥50 µg/dL. Return when two consecutive BLLs are below 40 µg/dL. Notify each employee of the BLL in writing within 5 working days after the employer receives the result, and at ≥40 µg/dL that the standard requires temporary medical removal with MRP benefits when the removal criterion is met. MRP maintains earnings, seniority, and other rights for up to 18 months. Construction removal is not general-industry 60 µg/dL. Blood is µg/dL, air is µg/m³, and EPA's occupant EBL is 20 µg/dL.
Section 16.1 was air. This section is blood. A worker can have an unprotected TWA of 40 µg/m³ (between AL and PEL) and a BLL of 52 µg/dL (removal). Those two 50s are not the same 50. Chapter 4 already separated EPA's 20 µg/dL EBL from OSHA. Do not put a child occupant's venous 20 on this page as a worker-removal number.
Two layers of surveillance — any day versus 30 days a year
| Layer | Who | What |
|---|---|---|
| Initial medical surveillance (j)(1)(i) | Exposed on any day at or above the action level (30 µg/m³) | Blood sampling and analysis for lead and ZPP |
| Trigger-task interim (d)(2)(v)(E) | Employees on listed (d)(2) tasks until assessment documents otherwise | Same biological monitoring: blood lead and ZPP |
| Full medical surveillance program (j)(1)(ii) | Exposed at or above the AL for more than 30 days in any consecutive 12 months | Periodic blood lead/ZPP on the (j)(2) schedule plus medical examinations in (j)(3) |
Appendix B (employee standard summary) adds a training-language point that courses repeat: blood lead and ZPP prior to assignment for each employee being assigned for the first time to an area where airborne lead equals or exceeds the action level at any time. That is a before they start the over-AL job idea, not a permission to wait a month. (j)(1)(i) itself is the any-day trigger. Together they mean: do not put someone on an over-AL or trigger-task job with no baseline BLL/ZPP.
Do not wait 30 days to do anything. The 30-day clock opens the full program (periodic exams, the every-two-months-for-six-months blood schedule). Initial blood lead and ZPP, and trigger-task BLLs, are already due on the any-day / first-assignment side.
The 5-working-day clocks are notifications, not a day-5 blood draw
Course slides often compress this into “initial BLL within 5 days of placement.” That sentence is not in 1926.62(j). The 5-working-day clocks in the standard are result notifications:
| Clock | What 1926.62 actually says | What it is not |
|---|---|---|
| 5 working days after the employer receives air-monitoring results (d)(8) | Notify each affected employee of those results, in writing or by posting | Not the deadline to take the first cassette |
| 5 working days after the employer receives biological monitoring results (j)(2)(iv)(A) | Notify each employee in writing of his or her blood lead level | Not “draw blood on calendar day 5 of employment” regardless of exposure |
| Same 5-working-day BLL notice, plus (j)(2)(iv)(B) | If BLL is ≥40 µg/dL, also tell the employee that the standard requires temporary medical removal with MRP benefits when the removal criterion is met | Not removal at 40 |
| Two weeks after the employer receives a BLL at the removal criterion (j)(2)(ii) | Provide a follow-up blood test | Not the removal itself; removal needs the pair |
| EPA 5 business days before abatement start (745.227(e)(4)) | EPA (or authorized state) notification of the job | A different statute, a different 5, and not a BLL |
If an item says “within 5 days,” recover five of what, after what event. On this chapter the safe recovery is: 5 working days after receipt of results. On Chapter 9 it is 5 business days before start. They are not interchangeable, and neither is “fire the employee on day 5.”
Blood-lead frequency after you are in the program
| Condition | Blood lead and ZPP schedule |
|---|---|
| Full-program employee ((j)(1)(ii)), BLL still below 40 | At least every 2 months for the first 6 months, then every 6 months |
| Last BLL ≥40 µg/dL (initial or full-program employee) | At least every 2 months until two consecutive tests are below 40 µg/dL |
| Medically removed for elevated BLL | At least monthly during the removal period |
| BLL at or above the removal criterion (50 µg/dL construction) | Follow-up test within two weeks of the employer receiving the first result |
Labs must be OSHA-approved for blood lead, with accuracy within ±15 percent or 6 µg/dL, whichever is greater, at 95 percent confidence. The employer makes surveillance available without cost and at a reasonable time and place. Prophylactic chelation is prohibited. Therapeutic or diagnostic chelation, if done, is a licensed physician's job in a clinical setting with monitoring — not a supervisor with a bottle of pills.
Construction removal is 50 on a pair, return is two below 40
1926.62(k)(1)(i): remove the employee from work having exposure to lead at or above the action level on each occasion that a periodic and a follow-up blood sampling test indicate BLL at or above 50 µg/dL.
Read the pair. One 52 µg/dL result is not yet removal. It is a demand for a follow-up within two weeks. If the follow-up is also ≥50, now you remove. Removal is from work ≥ action level, not only from work ≥ PEL. A 6-month wet-scrape job at 35 µg/m³ is still an AL job; a removed worker does not go back to it until the return rule is met.
Return (k)(1)(iii): for BLL removal, when two consecutive blood tests indicate BLL below 40 µg/dL. One 39 does not return the worker. Two consecutive 39s do.
Also remove on a final medical determination that the employee has a detected medical condition placing the employee at increased risk of material impairment from lead — pregnancy-related advice, respirator medical limits, and other physician findings live here. Return from that kind of removal needs a later final medical determination that the increased-risk condition is gone.
MRP benefits (k)(2): up to eighteen (18) months on each occasion of removal or medical limitation. As long as the job the employee was removed from continues, the employer maintains total normal earnings, seniority, and other employment rights and benefits, including the right to former job status, as though the employee had not been removed. The employer may condition MRP on participation in follow-up medical surveillance. MRP is not a permission to fire the worker at month 3 to stop the paycheck. It is not 18 days, 18 weeks, or workers' compensation substituting for earnings.
Worked example — 52 then 48 then 41 then 37 then 36. Periodic BLL 52 µg/dL. Follow-up within two weeks is 48 — still ≥50, so remove from ≥AL work and start monthly BLLs and MRP. Next monthly is 41 — still removed (return needs below 40, twice). Next is 37. That is one below 40. Next is 36. Now two consecutive below 40; return to former job status is required. Earnings and seniority ran through that stretch, up to the 18-month cap if it had lasted that long. A supervisor who says “48 is under 50 so go back on the gun” failed the pair rule on the way in and the two-below-40 rule on the way out.
Construction 50 is not general-industry 60, and neither is EPA 20
| Regime | Removal trigger | Return | Do not use it for |
|---|---|---|---|
| OSHA construction 1926.62 | Periodic and follow-up ≥50 µg/dL | Two consecutive below 40 µg/dL | Occupants; air PEL |
| OSHA general industry 1910.1025 | Periodic and follow-up ≥60 µg/dL, or average of last three (or 6 months) ≥50 µg/dL (with a last-test-below-40 exception) | Two consecutive below 40 µg/dL | Construction / abatement crews |
| EPA 745.223 EBL | Occupant: 20 µg/dL single venous, or 15–19 µg/dL twice 3 to 4 months apart | Not an occupational return rule | Worker MRP |
| CDC childhood BLRV | 3.5 µg/dL screening statistic | Not a work rule | Either OSHA or TSCA work practices |
Abatement is construction. Quote 1926.62: 50 on the pair, 40 twice to return, 40 to warn about MRP, 18 months of benefits. A vendor slide that still teaches “remove at 60” is teaching the wrong standard.
Worked example — units on one page. Cassette 50 µg/m³ (PEL), worker BLL 50 µg/dL (removal criterion if confirmed), child occupant 20 µg/dL (EPA EBL). All three “50 or 20” sentences can be true at once. The supervisor's OSHA file is the worker's pair of BLLs and the MRP letter. The supervisor's EPA file is the child's EBL documentation for abbreviated notice (Chapter 9). Mixing the files is how you medically remove a toddler or treat a PEL exceedance as a blood result.
Supervisor decision test. (1) Who is at or above the AL today (any-day initial BLL/ZPP) versus more than 30 days in 12 months (full program)? (2) Did every employee get a written BLL within 5 working days of receipt, and a ≥40 MRP warning when that applies? (3) Is removal waiting for the follow-up, and is return waiting for two below 40? (4) Are you quoting 50 for construction, not 60? (5) Did anyone offer chelation as a way to keep a 55 µg/dL worker on the gun?
Official sources: 29 CFR 1926.62(j), (k); 1926.62 App B; 29 CFR 1910.1025(k) (general-industry contrast only).
Which statement correctly states OSHA construction medical-removal numbers under 29 CFR 1926.62?
Which employees must be offered OSHA construction biological monitoring, and when does the full medical-surveillance program attach?
A training slide says 'initial BLL within 5 days of placement.' What are the actual 5-working-day clocks in 1926.62, and what is the real initial-surveillance trigger?
A painter certified as an EPA worker on a residential abatement has a periodic BLL of 54 µg/dL. The employer wants to keep the worker on the gun because 'general industry uses 60' and '50 is just the PEL.' What is the correct analysis?