Why this matters
Cutting, drilling, grinding or disturbing concrete, masonry, mortar and similar materials can create respirable crystalline silica. Health hazards are easy to underestimate because the injury may not happen immediately. Dust, fumes, vapors, fibers and chemicals can build exposure over minutes, hours or years. The crew needs to know what the substance is, how exposure occurs and which controls come before PPE.
A scenario to discuss
While performing Silica Dust Control, the HEPA, wet method, ventilation, containment, or other engineering control stops working effectively. PPE is still being worn. What is the correct response before exposure continues?
Before work starts
- Identify the product/material and review the SDS, survey or task-specific exposure information before disturbance/use.
- Set up the engineering control first: ventilation, wet method, HEPA extraction, containment or another specified control.
- Verify required PPE/respiratory protection, hygiene and cleanup methods before exposure starts.
- Identify silica-generating tasks before work begins.
- Use required engineering controls such as water delivery or local exhaust exactly as specified for the task.
Common failure points
- Relying on a respirator or gloves while the engineering control is missing or ineffective.
- Disturbing a material before confirming what it is or how exposure is controlled.
- Using dry cleanup or compressed air that puts settled contamination back into the breathing zone.
Safe work sequence / controls
- Identify silica-generating tasks before work begins.
- Use required engineering controls such as water delivery or local exhaust exactly as specified for the task.
- Do not dry sweep or use compressed air in ways that unnecessarily spread silica dust when safer methods are available.
- Use required respiratory protection when the selected control method or exposure assessment calls for it.
- Keep other workers out of dusty areas and clean using methods that minimize airborne dust.
Stop and reset the plan if...
- The material, contaminant or SDS is unknown, or the planned exposure control does not match the product/task.
- Ventilation, wet methods, HEPA collection, containment or other engineering controls are not working.
- Required respiratory/PPE program conditions cannot be met or a worker develops symptoms.
Questions worth asking the crew
- What material or contaminant are we actually dealing with, and what SDS, survey, label, or other information confirms it?
- Which engineering control is doing the real work today: ventilation, wet method, HEPA collection, containment, or substitution?
- What would tell us that control is not working well enough before someone receives a significant exposure?
- After higher-level controls are in place, what PPE/respiratory protection is required and what are its limitations?
- Has anyone noticed dust, odor, irritation or another sign that the exposure control was not keeping up? What should we change before that happens here?
Make it real on the job
Show the product/material, exposure-control equipment and cleanup method instead of only naming the PPE.
Close the talk
Before the crew starts, everyone should be able to explain the hazard, point to the control being used today, and name the condition that would make the work stop.
Related authoritative reference
29 CFR 1926.1153 - Respirable Crystalline Silica · Open reference ↗
This is a practical discussion guide, not a substitute for required training, a competent person, permits, manufacturer instructions, employer procedures, or applicable federal/state/local requirements. Adapt it to the actual task and conditions.
