The construction silica rule addresses exposure to airborne respirable crystalline silica. The safety review needs the actual material, task, equipment and controls, together with the exposure information or specified-control approach the employer uses.
Under the alternative exposure-control provisions, the permissible exposure limit is 50 micrograms per cubic meter of air, calculated as an eight-hour time-weighted average. The action level is 25 micrograms per cubic meter as an eight-hour average. These are different values with different roles in the standard. 1926.1153(d)(1), 1926.1153(b)
This article is general information, not legal advice.
Check The Scope For The Actual Work
Section 1926.1153 applies to construction exposures to respirable crystalline silica, except where employee exposure remains below 25 micrograms per cubic meter as an eight-hour average under any foreseeable conditions. The exception needs that full condition, not simply a visual impression that the work produces little dust. 1926.1153(a)
Identify the material and the operation before deciding the approach. Cutting, drilling, grinding and other activities can have different equipment and control requirements. Include nearby workers whose exposure may be affected by the operation.
The planning discussion should identify who evaluates the task, what control approach applies and who checks that the arrangement is maintained while work is underway.
Table 1: Specified Controls For Listed Tasks
For a task identified in Table 1, the employer must fully and properly implement the engineering controls, work practices and respiratory protection specified for that task, unless it uses the alternative assessment and control provisions in paragraph (d). 1926.1153(c)(1)
Read the complete row for the equipment and activity. Table 1 can distinguish indoor or enclosed work from outdoor work, and its respiratory-protection columns distinguish tasks lasting up to four hours per shift from those lasting more than four hours. The requirements vary by row. 1926.1153(c), Table 1
Use the actual setup to check the row. The tool, dust-control equipment, operation and maintenance instructions all matter. Selecting a familiar task name without checking the specified arrangement leaves the control decision incomplete.
The Alternative Exposure-Control Route
For tasks outside Table 1, or where its controls are not fully and properly implemented, paragraph (d) applies. It requires the employer to keep exposure within the permissible limit and assess workers who are or may reasonably be expected to be exposed at or above the action level. 1926.1153(d)(1), (2)(i)
The assessment can use a performance option based on sufficient air-monitoring or objective data, or the scheduled-monitoring option. The performance data must accurately characterize the worker's exposure. 1926.1153(d)(2)(ii), (iii)
Engineering and work-practice controls must reduce and maintain exposure within the limit unless the employer demonstrates they are not feasible. Where feasible controls are insufficient, the employer must still use them to reduce exposure as far as feasible and supplement with respiratory protection. 1926.1153(d)(3)(i)
Use the person responsible for the exposure assessment to establish the required approach. Video and photos do not measure airborne silica concentration or establish that the exposure limit is met.
Put The Controls In A Written Plan
The employer must establish and implement a written exposure control plan describing the tasks involving exposure, the controls and respiratory protection for each task, housekeeping measures, and procedures for restricting access where necessary to minimize exposure. That includes exposure generated by other employers or sole proprietors. 1926.1153(g)(1)(i) Through (iv)
The plan's effectiveness must be reviewed at least annually and updated as necessary. It must be readily available for examination and copying to covered workers, their designated representatives and the agency officials identified in the rule. 1926.1153(g)(2), (3)
Make the plan usable for the people doing the work. They need to identify the task and the control arrangement that applies to it. Review changes in equipment, location or nearby activity with the people responsible for the plan.
Assign The Competent Person
The employer must designate a competent person to make frequent and regular inspections of jobsites, materials and equipment to implement the written plan. 1926.1153(g)(4)
The silica standard's definition combines the ability to identify existing and foreseeable silica hazards with authority to take prompt corrective measures to eliminate or minimize them. It also requires the knowledge and ability needed for the written-plan responsibilities. 1926.1153(b)
Identify that contact in the work handoff. The crew should know who checks the controls and who can resolve a concern when the task or conditions change. Our competent-person guide explains related construction role definitions.
Housekeeping Has Silica-Specific Requirements
Dry sweeping or brushing cannot be allowed where it could contribute to silica exposure unless wet sweeping, HEPA-filtered vacuuming or another exposure-minimizing method is not feasible. 1926.1153(f)(1)
Compressed air cannot be used to clean clothing or surfaces where it could contribute to exposure unless an effective dust-capture ventilation system is used with it or no alternative method is feasible. 1926.1153(f)(2)(i), (ii)
Include the cleaning method in task planning. The crew finishing an operation and the people removing waste need the same understanding of the controls. Our construction housekeeping guide covers the general debris and access rules alongside this silica-specific review.
Explain The Task And Controls To Workers
Covered workers must be able to demonstrate understanding of the silica health hazards, exposure-generating tasks, protective measures, the standard, the competent person's identity and the medical surveillance program's purpose and description. 1926.1153(i)(2)(i)
The standard also has separate respiratory-protection, medical-surveillance and recordkeeping duties. Review those provisions for the actual exposure and work arrangement. 1926.1153(e), 1926.1153(h), 1926.1153(j)
Use a familiar work example when explaining the plan. Identify the task, the chosen control approach and how the crew contacts the competent person. A practical explanation helps workers recognize what to check before starting and what to report during the operation.
Questions Before A New Task Starts
Use these planning questions with the people responsible for the operation:
- Which material and equipment will the crew use?
- Does the complete Table 1 row fit the operation, or is the alternative route being used?
- What controls and respiratory protection apply to the actual conditions?
- How will cleaning and waste removal follow the plan?
- Who is the competent person, and how does the crew contact them?
- What nearby work could affect exposure or access?
Keep the answers connected to the written plan. When equipment, location or surrounding work changes, identify who reviews the new arrangement before the task proceeds.
Where Osha Ask Helps
Osha Ask reviews job site video and photos and checks what it sees against OSHA requirements. It flags hazards and missing safety measures so your safety team can act on them sooner. Visible PPE and housekeeping concerns can prompt a closer on-site review, while the responsible people handle the silica assessment and control plan.
AI helps your safety team see more; your people still make the call.
Explore the construction safety guide, OSHA compliance software and AI video safety monitoring. The PPE guide explains related selection and fit questions.
Osha Ask is an independent software product and is not affiliated with OSHA or the U.S. Department of Labor.