What was present?
Identify chemicals, metals, dusts, fibers, fumes, radiation, biologic hazards, noise, vibration, heat, or other agents. Record product and trade names when the exact constituent is unknown.
Occupational exposure resource
Occupational Exposure Resource Guide.
A practical framework for documenting workplace hazards, building the medical chronology, and evaluating whether an exposure may have contributed to disease.
Start with the work
Job title alone does not define exposure.
A useful occupational-exposure assessment reconstructs what the worker actually did, the agents and processes involved, how exposure could have occurred, and when the medical condition developed. The history, objective records, clinical findings, and scientific evidence must be considered together.
Updated August 2026 · Clinician and case-review guide
Exposure profile
Describe the conditions, not just the chemical name.
What did the worker do?
Document tasks, processes, equipment, work location, proximity to the source, maintenance or upset conditions, spills, and changes in production practices.
How could exposure occur?
Consider inhalation, skin contact, ingestion, injection, and take-home exposure. Note ventilation, enclosure, hygiene practices, and personal protective equipment.
Hazard is not the same as individual dose.
A substance may be capable of causing harm, but an individualized assessment also asks whether the conditions, intensity, frequency, duration, and route of exposure were sufficient to make the claimed relationship medically plausible.
Seven-part record
Build a traceable exposure and disease chronology.
Complete work history
List every job, employer, facility, date range, task, military assignment, temporary job, and relevant hobby.
Exposure details
Record agent, route, frequency, duration, intensity clues, protective equipment, ventilation, and unusual events.
Source records
Gather safety data sheets, air or wipe sampling, biological monitoring, incident reports, industrial-hygiene surveys, and training records.
Medical timeline
Connect first and last exposure, symptom onset, work-related fluctuation, diagnosis, treatment, progression, and latency.
Objective findings
Collect examinations, laboratory tests, imaging, pathology, pulmonary testing, neurologic studies, and specialist evaluations.
Alternative causes
Evaluate smoking, age, family history, medications, disease, non-work exposures, hobbies, and other occupational agents.
Medical reasoning
Explain temporality, dose indicators, known health effects, biologic plausibility, consistency, competing explanations, and uncertainty.
Documents to request
Contemporaneous records often matter most.
- Safety Data Sheets and product inventories
- Personnel files, job descriptions, work orders, and process descriptions
- Exposure-monitoring results and industrial-hygiene reports
- Occupational medical-surveillance and biological-monitoring records
- OSHA logs, incident reports, spill records, and corrective-action reports
- Respirator fit testing, protective-equipment records, and training materials
- Coworker statements that describe shared tasks and conditions
- Complete relevant medical records and an organized chronology
Record-access point
OSHA advises that workers may request access to certain employee exposure and medical records under 29 C.F.R. § 1910.1020. The rule includes long retention periods for many occupational exposure and medical records.
Clinical interpretation
Questions that keep the analysis disciplined
DiagnosisIs the condition clearly diagnosed and phenotyped?
TimingDoes onset fit the exposure period and known latency?
IntensityWhat objective or circumstantial evidence informs magnitude?
PatternDid symptoms vary with work, shifts, weekends, or removal?
SpecificityIs the claimed effect recognized for this agent and route?
AlternativesWhat other explanations are supported by the record?
Official sources
Clinical and workplace resources
- ATSDR: Taking an Exposure History.
- OSHA: Clinicians’ occupational-health resources.
- OSHA: Access to Employee Exposure and Medical Records.
- NIOSH Health Hazard Evaluation Program.
Educational use only. This guide provides general information, not medical, industrial-hygiene, safety, or legal advice. Individual causation requires review of the complete exposure and medical record under the applicable standard.
Referral process
Four steps from inquiry to opinion.
01 · Initial inquiry
Share the referral question, jurisdiction, deadlines, and parties for conflict review—without protected health information.
02 · Scope & engagement
Confirm the materials, requested work product, timing, and terms.
03 · Secure transfer
Provide records only through the approved secure channel after engagement.
04 · Review & opinion
Receive clear communication, a thorough analysis, and the agreed deliverable.
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