Under 29 CFR 1926.1153, you must train every construction employee exposed to respirable crystalline silica, ensure they can demonstrate knowledge of specific topics, and retrain whenever workplace conditions change.
Who on your crew needs silica training?
Under 29 CFR 1926.1153, you must provide silica training to every construction employee with occupational exposure to respirable crystalline silica. The only exception is if you can objectively demonstrate that the employee's exposures will remain below 25 µg/m³ as an 8-hour time-weighted average under any foreseeable conditions. In practice, that exclusion almost never applies to crews who cut, grind, drill, jackhammer, tuckpoint, demolish, or abrasive-blast concrete, brick, stone, mortar, tile, fiber-cement board, or masonry.
If a worker performs any task listed in Table 1 of 1926.1153, training is required regardless of how long the task lasts. OSHA has carved out no de minimis duration exception. A laborer who makes a single dry cut with a handheld power saw, drills two holes with a rotary hammer, or sweeps up silica-containing slurry after wet cutting needs the same hazard awareness as a mason cutting block all day. Supervisors and foremen overseeing these tasks must also be trained so they can verify that engineering controls, work practices, and respirators are in place and functioning before each shift.
If you have designated a competent person under 1926.1153(b), that individual must be capable of identifying existing and foreseeable silica hazards. They must also have actual authority to stop work and order corrective action. Title alone does not satisfy the standard. A supervisor only fills the competent person role if formally designated and qualified. Housekeeping personnel who clean areas where silica dust accumulates also need training. Dry sweeping, dry brushing, and compressed-air cleanup are specifically prohibited under 1926.1153(f) unless infeasible.
Every bit of this training must be provided in a language and vocabulary each worker can understand. Using terms like "pulmonary fibrosis" without a plain-English explanation, or delivering training only in English to a non-English-speaking crew, fails the requirement.
What topics must the training cover?
29 CFR 1926.1153(i)(2) spells out the required content. Then 1926.1153(i)(1) makes clear that each employee must be able to demonstrate knowledge and understanding of it. A sign-in sheet or passive video does not satisfy the standard on its own.
You must cover the health hazards. That means silicosis in its chronic, accelerated, and acute forms. It means lung cancer, chronic obstructive pulmonary disease, kidney disease, and immune-system effects including the elevated risk of tuberculosis reactivation in workers with latent TB infection. Workers need to know these diseases are often irreversible, incurable, and can progress even after exposure ends. Symptoms often start silently. Later stages bring shortness of breath, persistent cough, chest tightness, and fatigue.
You must teach the specific tasks in your workplace that create exposure. That may include handheld saw cutting, walk-behind sawing, mortar removal with grinders, jackhammering, core drilling, chipping, scarifying, or demolition of silica-containing materials. Then you must explain the specific measures you have implemented to protect them. That includes engineering controls such as integrated water delivery for wet cutting and local exhaust ventilation with HEPA filtration capable of capturing 99.97 percent of particles at 0.3 micrometers. It includes work practices like wetting concrete rubble before handling and prohibiting dry sweeping. And it includes respiratory protection when engineering controls cannot reduce exposure to or below the PEL of 50 µg/m³.
Workers must also know the contents of 29 CFR 1926.1153 itself. They must understand the purpose and description of your medical surveillance program. They must know the identity of the competent person designated by the employer. They should know the numeric limits. The Action Level is 25 µg/m³ and the PEL is 50 µg/m³, both as 8-hour TWAs. Finally, you must connect silica to your Hazard Communication program under 29 CFR 1910.1200. Workers need to know how to access labels and safety data sheets.
How often must you retrain?
There is no fixed annual retraining interval in 29 CFR 1926.1153. You train before initial assignment. You retrain whenever workplace conditions change such that controls, tasks, materials, or PPE differ from what you originally taught. Examples include switching from wet cutting to local exhaust ventilation, adding a new Table 1 task to the schedule, bringing in new equipment, revising the Written Exposure Control Plan, or receiving new exposure data that changes your control strategy.
You must also retrain if you have reason to believe an employee lacks the required knowledge or understanding. Observing a worker dry sweeping silica dust, skipping a user seal check, removing a respirator in a contaminated area, or using a standard shop vac instead of a HEPA-filtered vacuum with a filter-cleaning mechanism is clear evidence that retraining is necessary.
While many employers adopt a 12-month refresher as a matter of policy, that cadence is a platform default, not a federal mandate. What is federally mandated is that your Written Exposure Control Plan be reviewed at least annually under 1926.1153(g)(2). If that annual review reveals changes to tasks or controls, updated training must follow. Additionally, 29 CFR 1910.1200(h) requires supplemental Hazard Communication training whenever a new chemical hazard is introduced into the work area.
Your written exposure control plan must be site-specific and current
A generic corporate template with no project address or task list is one of the most common citations under the silica standard. Under 1926.1153(g), you must maintain a Written Exposure Control Plan that is site-specific. It must identify each silica-generating task on the job. It must describe the engineering controls, work practices, and housekeeping methods you will use. It must name the competent person.
The plan must be on site and accessible to workers and their representatives on request. You must review it at least annually. You must also update it whenever a change occurs in the tasks, equipment, personnel, or controls. If the plan changes, your training must change with it. Treating the WECP as a back-office paper exercise is a fast path to a citation when an inspector asks a worker to name the competent person or explain the controls for the task they are performing.
What records prove your program is compliant?
Compliance is not proven by attendance alone. The standard requires demonstrated knowledge. Your records should reflect however you verify understanding. That might be documented quizzes, practical demonstrations, or signed acknowledgments that specific questions were answered correctly.
Exposure monitoring records must be retained for 30 years under 1926.1153(j) and 29 CFR 1910.1020. Objective data relied on in place of monitoring must be kept for the duration of reliance. If you perform exposure assessment, you must notify construction workers of the results within 5 working days. That is a tighter window than the 15 working days that applies to general industry.
Medical surveillance records must be retained for the duration of employment plus 30 years. In supervisor-accessible files, keep only the PLHCP Written Medical Opinion. Placing full medical examination results in personnel files violates the confidentiality requirements of 1910.1020.
When you're ready to stop juggling spreadsheets for silica training, exposure monitoring, and WECP reviews, Jobsite tracks OSHA compliance, training, certifications, and inspections for contractors. Visit our training platform to see how we keep your crew current and your records audit-ready.
FAQ
Does OSHA require annual silica refresher training for construction workers?
No. There is no fixed federal annual retraining requirement in 29 CFR 1926.1153. You must train before initial assignment and retrain when workplace conditions change or when you observe knowledge gaps. While a 12-month refresher is a common employer policy, it is not an OSHA mandate.
Is a sign-in sheet enough to prove silica training?
No. Under 29 CFR 1926.1153(i)(1), each employee must be able to demonstrate knowledge and understanding of the required topics. A sign-in sheet or passive video alone does not satisfy the standard; you need some method to verify comprehension.
Does a worker who only cuts concrete once need silica training?
Yes. OSHA provides no de minimis duration exception for Table 1 tasks. Even a single instance of a silica-generating task can create respirable exposure, so the training requirement applies regardless of how brief the cut or drill may be.
What is the difference between a supervisor and a competent person under the silica standard?
A supervisor oversees the work, but a competent person under 1926.1153(b) is a separately designated role that requires the ability to identify silica hazards and actual authority to stop work immediately. A supervisor only qualifies if formally designated and meeting the standard's three-part test.
Cited standards
See how Jobsite handles this in practice: Training & certifications on the platform →
About the author
The Jobsite Editorial Team — Construction safety & OSHA compliance
The Jobsite Editorial Team writes the safety and compliance library behind Jobsite, the construction safety, OSHA compliance, and training platform for contractors. Every article starts from the primary regulatory text — the CFR section itself, not a summary of it — and is fact-checked against that source before it publishes, so what you read here is what the standard actually requires of small and mid-size contractors in the field.