A silica-exposure history is built task by task, not from a job title alone. A worker may spend one project cutting concrete indoors, another drilling outdoors with water delivery, and another near a different crew’s dry grinding. The records should show the material, tool, duration, controls and nearby dust for each period of work.
Build a project and task timeline
List each employer, project, location, trade and date range. Within each project, identify the worker’s own tasks and dust-generating work performed nearby. Payroll records, union dispatches, daily reports, badge logs, project photographs, coworker names and medical work histories can help reconstruct assignments years later.
Do not treat all cutting or drilling as one exposure. Record the material, tool, attachment, task duration, shift length, indoor or outdoor setting and distance from other work. Concrete, mortar, brick, stone and engineered materials can differ, and demolition may disturb several sources at once.
Match the control method to the actual task
29 C.F.R. section 1926.1153 is OSHA’s construction silica standard. For listed tasks, Table 1 specifies equipment, engineering controls, work practices and, in some circumstances, respiratory protection. A covered employer can instead use the standard’s alternative exposure-control approach. The investigation should identify which path the employer used.
For a claimed Table 1 method, compare the exact tool and task with the table and determine whether every listed condition was fully implemented. A wet saw does not establish adequate water flow, placement or use for the full shift. A shroud does not establish that the correct vacuum, filter and airflow were connected and maintained.
Preserve exposure and equipment records
Collect personal air-monitoring results, sampling plans, laboratory reports, objective data and communications about high readings. Record the employee sampled, task, duration, weather, nearby operations and controls in use. One short sample from a different worker or project may not represent the exposure being investigated.
Preserve tool inventories, water-delivery and vacuum specifications, filter changes, maintenance, competent-person inspections and photographs. Production records and equipment telematics may show how long the tool operated. Obtain the written exposure-control plan and the records showing how it was implemented at the particular project.
Review respirator and housekeeping evidence
When respiratory protection was required or used, obtain medical clearance, fit tests, respirator model and size, assigned protection information, cartridge or filter records, training and observations of actual use. Respirators should be evaluated with the engineering and work-practice controls rather than treated as proof that the underlying dust control was adequate.
Document cleanup practices. Dry sweeping, compressed air and accumulated dust can create exposure after the cutting or grinding stops. Water, vacuum and disposal records may show whether the stated method was available throughout the work.
Connect the occupational history to the medical record
Preserve the complete occupational history, symptom timeline, imaging, pulmonary-function testing, pathology when available, treatment records and medical opinions. The evaluation may need to consider silica exposure alongside smoking, other dusts, prior disease and non-work causes without assuming that any one factor decides the case.
OSHA’s standard includes medical-surveillance provisions for covered workers under specified conditions. Those records may help identify what was known and when, but the existence or absence of surveillance does not by itself establish medical causation.
Separate each company’s role
A long exposure history may involve direct employers, general contractors, host facilities, tool owners, material suppliers and respiratory-protection vendors. Identify who selected the material and method, controlled the area, supplied controls, performed monitoring and could stop dusty work. Contracts help locate duties and records, while site practice shows who actually made the decisions.
A Louisiana construction-injury review can separate workers’ compensation issues from potential claims involving another company or product. Our guides explain when a workplace injury may support a third-party lawsuit and the Louisiana workers’ compensation framework.
Editorial & Legal Accuracy Notice (Louisiana)
Sources checked: September 24, 2026
Exposure, diagnosis, timing, regulatory coverage and available remedies require project-specific occupational, medical and legal analysis.