Skip to content
All safety questions
Asked by a personGeneral — US and Canadaen-US

Write a safe work procedure for Silica Awareness Safety Training in Construction workplaces, involving, excavation, cutting concrete, ashphalt, removing dry wall and demo debris, drilling, etc

A person submitted this question to Rosie's free generator. The asker's identity is neither imported nor published.

Rosie's answer

Published by SALUS

Silica Awareness Safety Training and Safe Work Procedure for Construction Activities ====================================================================================

Document Number: \[SWP-NUMBER]

Revision Date: \[DATE]

Next Review Date: \[NEXT REVIEW DATE]

Department: \[DEPARTMENT NAME]

1\. Scope

This safe work procedure applies to construction activities that may generate respirable crystalline silica dust, including excavation and earth drilling, concrete and asphalt cutting, drilling, grinding, jackhammering, drywall removal and finishing, demolition, and handling of demolition debris. It covers planning, hazard assessment, exposure control, dust suppression, housekeeping, personal hygiene, PPE, respiratory protection, exposure monitoring, training, and emergency response. The procedure is intended for outdoor and indoor work, including enclosed or partially enclosed areas, where silica-containing materials such as concrete, masonry, stone, mortar, asphalt, drywall compounds, and related construction materials may be disturbed. It is limited to tasks where silica exposure can be controlled through engineering controls, work practices, and respiratory protection as required by the applicable standard. It does not replace site-specific exposure control plans, manufacturer instructions, or regulatory requirements, and it must be adapted when conditions change, when visible dust persists, when equipment malfunctions, or when work occurs in regulated or restricted access areas.

2\. Definitions

Respirable crystalline silica Very small airborne particles of crystalline silica that are small enough to penetrate deep into the lungs when materials such as concrete, brick, stone, mortar, sand, or asphalt are cut, ground, drilled, crushed, or otherwise disturbed. Exposure assessment A workplace evaluation used to determine whether respirable crystalline silica is present at or above the action level and to identify the amount of exposure created by specific tasks and conditions. Local exhaust ventilation (LEV) An engineering control system that captures dust at or near the point of generation and removes it from the breathing zone before it becomes airborne. Wet method A dust control method that uses water delivered to the cutting, drilling, grinding, or breaking point to suppress dust generation and reduce the amount of respirable crystalline silica released into the air. HEPA filtration High-efficiency particulate air filtration used on vacuums or dust collection systems to capture fine dust particles, including respirable silica, during cleanup or source capture operations.

3\. Responsibilities

3\.1 Supervisors

  • Plan the work so that silica-generating tasks are identified before work begins, and ensure the appropriate controls are selected for each task based on the material, tool, duration, and work environment.
  • Ensure an exposure assessment is completed when required and verify that the action level and permissible exposure limit are not exceeded through the use of effective engineering controls, work practices, and respiratory protection where necessary.
  • Implement and enforce the written exposure control plan, designate a competent person, and ensure regulated or restricted access areas are clearly marked and access is limited to authorized personnel.
  • Provide workers with task-specific training, fit testing, and respiratory protection program support when respirators are required, and ensure all dust control equipment is maintained in good working order.
  • Stop work and reassess conditions when visible dust is not controlled, when equipment fails, when water supply or ventilation is inadequate, or when site conditions change in a way that could increase exposure.

3\.2 Workers

  • Follow the safe work procedure, use the assigned dust controls exactly as trained, and never bypass, disable, or remove guards, shrouds, water delivery systems, or vacuum attachments.
  • Wear the required PPE and respiratory protection correctly, perform user seal checks where applicable, and report any respirator fit, comfort, damage, or seal concerns immediately.
  • Inspect tools, hoses, filters, shrouds, and water delivery components before use, and remove defective equipment from service until repaired or replaced.
  • Maintain good hygiene by washing hands and face before eating, drinking, smoking, or leaving the work area, and by changing out of dusty clothing before going home when required.
  • Report visible dust, malfunctioning controls, slurry buildup, housekeeping issues, near misses, symptoms of overexposure, and any unsafe condition to the supervisor without delay.

3\.3 Health and Safety Representative

  • Support hazard identification and worker consultation by reviewing silica-generating tasks, observing work practices, and helping verify that controls are practical and consistently applied.
  • Participate in training reviews, exposure control plan reviews, and incident trend analysis to identify recurring deficiencies and recommend corrective actions.
  • Assist in communicating worker concerns regarding dust exposure, housekeeping, respiratory protection, and access control to management for timely resolution.

4\. Potential Hazards and Risks

HazardRiskControl Measures
Cutting, drilling, grinding, or crushing silica-containing materials such as concrete, masonry, stone, mortar, asphalt, and drywall compoundsGeneration of respirable crystalline silica dust that can be inhaled deep into the lungs, causing silicosis, lung cancer, COPD, kidney disease, and other serious respiratory illness.Use the most effective source-control method available for the task, such as integrated water delivery, wet cutting, or vacuum dust collection with HEPA filtration. Select tools and methods that match the material and operation, and follow manufacturer instructions to minimize dust emissions. If controls cannot keep exposure below the applicable limit, implement respiratory protection and additional ventilation.
Dry sweeping, dry brushing, or compressed air cleanup of silica dust and slurryDust becomes airborne again and increases worker inhalation exposure, including secondary exposure to nearby workers.Use wet sweeping or HEPA-filtered vacuuming instead of dry sweeping or compressed air whenever feasible. Clean slurry before it dries, and do not use compressed air to clean clothing, surfaces, or filters unless an effective ventilation system captures the dust cloud.
Inadequate water flow, clogged hoses, damaged nozzles, or worn blades/bits on wet-cutting equipmentDust suppression fails, visible dust increases, and workers may be exposed above acceptable limits.Inspect hoses, nozzles, water supply, and cutting surfaces before each use. Ensure water continuously reaches the blade or bit, replace damaged components, and maintain equipment according to manufacturer instructions. Stop work if water delivery is not functioning properly.
Use of handheld grinders, saws, drills, jackhammers, or milling equipment in enclosed or poorly ventilated areasDust accumulates in the breathing zone and exposure increases for operators and nearby workers.Provide additional mechanical ventilation such as exhaust trunks, portable exhaust fans, air ducts, or other means to move contaminated air away from workers. Position ventilation to avoid obstruction and verify airflow is effective. Use LEV and HEPA vacuum systems where wet methods alone are not sufficient.
Demolition, excavation, and handling of debris containing silica-bearing materialsDisturbance of hidden dust and debris can create airborne silica exposure for operators, laborers, and adjacent trades.Conduct a pre-job hazard assessment to identify silica-containing materials and likely dust-generating activities. Restrict access to active dust-generating areas, use enclosed cabs where required for heavy equipment, and apply water suppression or dust collection during demolition and debris handling.
Improper respirator selection, poor fit, or use with facial hair that interferes with the sealRespiratory protection may fail, allowing inhalation of hazardous silica dust.Provide only approved respirators suitable for the exposure level and task, ensure fit testing and training are completed, and prohibit tight-fitting respirator use when facial hair prevents a proper seal. Use the respirator only as part of a complete respiratory protection program.
Dust accumulation on clothing, skin, tools, vehicles, and work surfacesSecondary exposure can occur during the shift and dust can be carried home, exposing family members and others.Use HEPA vacuuming or wet cleaning for clothing and surfaces, change into clean clothing before leaving the site, and shower when facilities are available. Do not brush or blow dust from clothing, and do not eat, drink, or smoke in dusty areas.

5\. Personal Protective Equipment (PPE)

Personal protective equipment is the last line of defense and must be used together with engineering controls, work practices, and housekeeping measures. PPE does not replace dust suppression or exposure control, but it is essential when residual exposure remains or when site conditions require additional protection.

  • Respiratory Protection: Use a respirator that is appropriate for the task and exposure level when engineering and work practice controls cannot keep silica exposure below the applicable limit or when Table 1 or the site exposure control plan requires it. Respirators must be part of a written respiratory protection program, and workers must be trained, medically cleared, and fit tested as required. Select the respirator type based on the operation, such as an N95 filtering facepiece for lower-risk tasks where permitted, or higher protection where exposure is greater. For abrasive blasting, use the required supplied-air or Type CE respiratory protection. [2]

[5] [2]

  • Do not use a tight-fitting respirator with facial hair that breaks the seal.
  • Perform a user seal check each time the respirator is donned.
  • Replace damaged, dirty, or poorly fitting respirators immediately.
  • Eye Protection: Wear safety glasses with side shields or goggles when cutting, drilling, grinding, jackhammering, or handling dusty debris to protect against airborne dust, slurry splash, and flying particles. Choose eye protection that remains effective when wet methods are used and that does not interfere with the respirator seal or other PPE. [14]

[18]

  • Use sealed goggles where splash or slurry is likely.
  • Replace scratched or damaged lenses that reduce visibility.
  • Protective Clothing: Wear disposable or washable work clothing that covers the body to reduce contamination of personal clothing and vehicles. Clothing should be selected to minimize dust retention and should be removed or cleaned before leaving the worksite. If facilities are available, shower and change into clean clothes before going home. [1]

[4]

  • Do not brush or blow dust from clothing.
  • Use HEPA vacuuming or wet cleaning for dusty clothing when appropriate.
  • Hand Protection: Wear durable work gloves suitable for the task to reduce contact with slurry, sharp debris, abrasive surfaces, and contaminated materials. Gloves should allow safe tool handling and should be cleaned or replaced when heavily contaminated or damaged. [14]
  • Select gloves that maintain grip when wet.
  • Remove gloves before eating, drinking, or smoking.
  • Head and Hearing Protection: Use hard hats and hearing protection as required by the site hazard assessment and the equipment in use. Cutting, drilling, grinding, jackhammering, and milling operations often create high noise levels and overhead hazards in addition to silica exposure. [18]
  • Ensure hearing protection is compatible with the respirator and eye protection.
  • Inspect hard hats for cracks, UV damage, and suspension defects.

Inspect all PPE before each use for damage, contamination, fit, and serviceability. Respirators must be checked for proper seal and cleanliness, eye protection must be free of cracks and excessive scratching, gloves must be intact and suitable for wet or abrasive work, and protective clothing must be clean enough to prevent secondary contamination. Replace disposable items when damaged, contaminated, or no longer effective, and clean reusable PPE according to manufacturer instructions and site procedures. Store PPE in a clean, dry location away from silica dust and other contaminants. [2] [17]

6\. Equipment and Tools

Dust-generating construction tools must be selected, operated, and maintained so that silica exposure is controlled at the source. Equipment condition, water delivery, shrouds, vacuum performance, and ventilation effectiveness must be verified before work begins and monitored throughout the task.

  • Wet-Cutting Saws and Drills with Integrated Water Delivery: Use saws, drills, and core equipment equipped with an integrated water delivery system that continuously feeds water to the blade or bit. Water must reach the cutting surface consistently and in sufficient volume to minimize visible dust. This equipment is appropriate for many concrete, masonry, and asphalt cutting tasks when operated according to manufacturer instructions. [16]

[8]

  • Check hoses for cracks, leaks, and secure connections.
  • Adjust nozzles so water reaches the blade or bit.
  • Verify water supply before starting and during operation.
  • Vacuum Dust Collection System with HEPA Filtration: Use a commercially available dust collection system or shroud attached to the tool and connected to a vacuum with HEPA filtration when wet methods are not feasible or when additional control is needed. The system must capture dust at the point of generation and be maintained so airflow and filtration remain effective. [9]

[5]

  • Keep hoses clear of kinks, debris, and tight bends.
  • Replace or clean filters and bags as directed by the manufacturer.
  • Do not overfill collection bags.
  • Local Exhaust Ventilation and Portable Exhaust Fans: Provide local exhaust ventilation or supplemental mechanical ventilation in enclosed or poorly ventilated areas to move contaminated air away from workers' breathing zones. Ventilation must not be blocked by doors, windows, or worker movement, and it should be positioned to capture or displace dust effectively. [16]

[7]

  • Use exhaust trunks, air ducts, or portable fans as needed.
  • Verify airflow direction before starting work.
  • Reassess ventilation when the work area changes.
  • HEPA Vacuum for Housekeeping and Clothing Cleanup: Use a HEPA-filtered vacuum for cleaning settled dust, slurry residue, and dusty clothing where permitted. This equipment helps prevent dust from becoming airborne during cleanup and reduces the risk of carrying silica off site. [4]

[13]

  • Use wet cleanup or HEPA vacuuming instead of dry sweeping.
  • Do not use compressed air unless dust is captured by ventilation.
  • Clean slurry before it dries.
  • Ground-Fault Circuit Interrupters and Watertight Electrical Connections: When water is used for dust suppression, use GFCIs and watertight, sealable electrical connectors for electric tools and equipment. This reduces the risk of electrical shock and equipment failure in wet work conditions. [12]
  • Inspect cords and connectors before use.
  • Remove damaged electrical equipment from service immediately.

Inspect all dust-control equipment before each shift and after any change in conditions. Confirm that hoses are connected and undamaged, nozzles are aimed correctly, water flow is adequate, shrouds fit properly, filters are clean, vacuum suction is sufficient, and collection bags are not overfilled. Maintain equipment in accordance with manufacturer instructions, replace worn blades or bits, and remove defective tools from service until repaired. If visible dust persists, stop work and correct the control failure before resuming. [10] [9] [16]

7\. Pre-Job Requirements

7\.1 Training and Competency

Training and Competency: Workers must be trained to recognize silica hazards, understand the tasks that generate respirable crystalline silica, and apply the correct controls for each operation. Training must cover the health effects of silica exposure, the use and limitations of wet methods, LEV, vacuum systems, housekeeping restrictions, PPE, respiratory protection, and emergency response. Supervisors and competent persons must be able to identify silica dust hazards, enforce the exposure control plan, and stop work when controls are not effective. [2] [14]

7\.2 Pre-Job Briefing

Pre-Job Briefing: Before work starts, conduct a toolbox talk or pre-task briefing to review the day’s silica-generating activities, the materials involved, the selected dust controls, access restrictions, PPE requirements, emergency arrangements, and any changes in site conditions. Confirm that workers understand who is responsible for monitoring controls, who will inspect equipment, and what to do if visible dust or equipment problems occur. The briefing should also identify nearby trades or public exposures and establish communication methods for stopping work if conditions become unsafe. [4] [13]

7\.3 Work Area Preparation

Work Area Preparation: Prepare the work area by identifying silica-containing materials, establishing boundaries around dust-generating operations, and restricting access to essential personnel only. Set up water supply, ventilation, vacuum systems, electrical protection, and housekeeping tools before cutting, drilling, grinding, or demolition begins. Where heavy equipment or demolition is involved, ensure the operator has the required enclosed cab or other approved controls and that nearby workers are protected from drifting dust. [1] [11]

8\. Safe Work Procedure Steps

  1. 1\. Review the task and identify silica-generating activities: Confirm the exact work to be performed, the materials involved, and whether the task includes excavation, cutting, drilling, grinding, jackhammering, drywall removal, demolition, or debris handling. Determine whether the operation will disturb concrete, masonry, stone, mortar, asphalt, or drywall compounds that may contain crystalline silica. If the task is short duration, do not assume it is exempt; evaluate the exposure potential and apply controls accordingly. [6]

[11]

  • Review the site plan, material information, and any prior exposure data.
  • Identify nearby workers and adjacent operations that could be affected.
  • Stop and reassess if the material composition is uncertain.
  1. 2\. Conduct the pre-task hazard assessment and confirm controls: Assess the work area for dust sources, ventilation limitations, electrical hazards, access issues, and the need for regulated or restricted access areas. Select the primary control method for the task, such as wet cutting, LEV, or vacuum dust collection, and confirm that the equipment is available and suitable for the tool and material. Verify whether exposure monitoring or an exposure assessment is required for the planned work. [1]

[3]

  • Confirm the action level and PEL requirements for the site.
  • Identify whether Table 1 methods apply or whether exposure-based controls are needed.
  • Document any unusual conditions such as enclosed spaces or high dust potential.
  1. 3\. Inspect tools, water systems, ventilation, and vacuums before use: Inspect all equipment before starting work. Check hoses, fittings, nozzles, shrouds, filters, collection bags, power cords, and connectors. Confirm that water reaches the cutting or drilling point, that vacuum airflow is adequate, and that ventilation is positioned to move contaminated air away from the breathing zone. Remove defective equipment from service immediately. [8]

[15]

  • Verify water supply and flow before the first cut or drill.
  • Check that vacuum hoses are clear, connected, and not kinked.
  • Ensure GFCIs and watertight connectors are used where water is present.
  1. 4\. Establish access control and communicate the work boundaries: Set up barriers, signs, or other controls to keep unauthorized personnel out of the dust-generating area. Inform nearby workers of the silica hazard, the controls in use, and the need to avoid entering the area without authorization and required PPE. If the work is in a regulated or restricted access area, ensure the area is clearly demarcated and access is limited to trained and protected personnel. [5]

[11]

  • Use signage that identifies silica dust hazards and required PPE.
  • Coordinate with other trades to prevent cross-exposure.
  • Assign a spotter or monitor when visibility or traffic is limited.
  1. 5\. Apply wet methods or source-capture controls during the task: Operate the tool with the selected dust control active from the start of the task. For cutting and drilling, use continuous water delivery to the blade or bit where feasible. For grinding or other tasks where wet methods are not practicable, use a shroud and HEPA-filtered vacuum or LEV. Maintain steady work practices so the control remains effective and visible dust is minimized. [17]

[9]

  • Keep water flowing continuously to the cutting surface.
  • Do not defeat shrouds or disconnect vacuum systems during operation.
  • Adjust work pace if needed to maintain control effectiveness.
  1. 6\. Use respiratory protection when required: If engineering and work practice controls cannot keep exposure below the applicable limit, or if the task requires respirators under the applicable standard or exposure control plan, wear the assigned respirator before entering the work area. Ensure the respirator is correctly selected, fit tested, and used as part of a compliant respiratory protection program. Do not rely on a respirator as the only control when source suppression or ventilation can be improved. [1]

[3]

  • Perform a seal check each time the respirator is donned.
  • Replace damaged or contaminated respirators immediately.
  • Do not enter the work area without the required respiratory protection.
  1. 7\. Manage slurry, dust, and debris during and after the task: Clean slurry and settled dust before it dries and becomes airborne again. Use wet cleanup methods or HEPA-filtered vacuuming, and place debris in designated containers or disposal areas to prevent re-entrainment. Do not dry sweep, dry brush, or use compressed air unless no feasible alternative exists and dust is effectively captured by ventilation. [10]

[13]

  • Clean work surfaces as the task progresses when practical.
  • Keep debris piles damp and controlled.
  • Dispose of collected dust and slurry according to site procedures.
  1. 8\. Complete post-job cleanup and decontamination: After the task is complete, clean tools, hoses, shrouds, and surrounding surfaces using wet methods or HEPA vacuuming. Remove dusty disposable clothing or clean reusable clothing before leaving the site, wash hands and face, and shower if facilities are available. Ensure vehicles and break areas are not contaminated with silica dust. [4]

[1]

  • Vacuum clothing rather than brushing or blowing it off.
  • Change into clean clothes before leaving the site.
  • Inspect the area for residual dust before demobilizing.

9\. Precautions and Safety Measures

  • Use substitution and planning to reduce silica exposure before work begins. - Choose less hazardous materials or methods where feasible, and avoid sand or other blasting media containing more than 1% crystalline silica. [1]

[2]

  • Restrict housekeeping practices that re-entrain dust into the air. - Use wet sweeping or HEPA-filtered vacuuming instead of dry sweeping, dry brushing, or compressed air whenever feasible. [7]
  • Keep eating, drinking, smoking, and cosmetic application out of dusty areas. - Provide clean break areas and require hand and face washing before meals, smoking, or leaving the work area. [2]

[14]

  • Limit access to active silica-generating work zones. - Use barriers, signs, and supervision to keep unprotected personnel away from dust sources and to prevent cross-exposure from nearby trades. [1]
  • Maintain dust-control systems in good working order. - Inspect filters, hoses, water delivery components, and ventilation equipment routinely and repair or replace defective parts immediately. [1]

[4]

10\. Emergency Procedures

10\.1 General Emergency Response

If an emergency occurs, stop the task immediately, make the area safe if it can be done without risk, and notify the supervisor. Move affected workers to fresh air if dust exposure is suspected, provide first aid within the scope of training, and call emergency services for serious injury, respiratory distress, electrical shock, or uncontrolled equipment failure. Preserve the scene for investigation when safe to do so, and do not restart work until the hazard has been identified and corrected. [5]

10\.2 Specific Emergency Scenarios

  • Visible dust is escaping from the tool, slurry is drying, or the dust control system fails during cutting, drilling, grinding, or demolition.: Stop work immediately and isolate the area. Shut down the tool, inspect the water delivery system, shroud, vacuum, or ventilation equipment, and correct the failure before restarting. If exposure may have exceeded the limit, notify supervision and arrange for exposure assessment or monitoring as required. [8]

[11]

  • A worker develops coughing, shortness of breath, chest tightness, dizziness, or other symptoms during silica-generating work.: Remove the worker from the dusty area, provide fresh air, and seek medical evaluation promptly. Report the symptoms to supervision and document the task, duration, controls used, and any equipment problems so the exposure can be reviewed. Do not allow the worker to resume exposure until medically cleared if required by company policy or the respiratory protection program. [4]

[2]

  • Electrical equipment is used with water suppression and a shock, short circuit, or damaged cord is discovered.: Stop work, de-energize the equipment if it can be done safely, and keep workers clear of the area. Remove damaged electrical equipment from service, use GFCI protection and watertight connectors, and have a qualified person inspect the system before reuse. [12]
  • A jackhammer, saw, grinder, or drill creates uncontrolled dust in a confined or enclosed area.: Stop the operation, increase ventilation, and reassess whether additional controls or a different method are required. Limit access to the area, verify that the water spray, LEV, or vacuum system is functioning, and resume only when dust is controlled and workers are properly protected. [18]

[16]

10\.3 Emergency Contact Information

Emergency contact information, site first aid resources, and external emergency numbers must be posted or otherwise made readily available at the worksite before silica-generating work begins. Workers must know how to contact supervision, site emergency response personnel, and local emergency services.

Approved by: \[NAME AND POSITION]

Date: \[APPROVAL DATE]

Safety powered by SALUS

18 source record(s)

Sources used for this answer

[1] OSHA Fact Sheet - Control Of Silica Dust In Construction: Handheld Power Saws

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION Handheld Power Saws Using a handheld power saw (also called a cut-off saw) to cut masonry, concrete, stone, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of dust that gets into the air when using handheld power saws with an integrated water delivery system as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. This fact sheet does not apply to handheld saws used to cut fiber-cement board. ## Engineering Control Method: Water applied continuously to the saw blade ## Wet Cutting Many handheld power saws come equipped with an integrated water delivery system designed to cool the blade by directing a continuous stream of water onto the blade where it wets the material being cut and reduces the amount of dust generated when cutting. Water can be supplied to the saw by either a pressurized container or by a constant water supply such as a hose connected to a faucet or construction site water supply. Water flow rates must be sufficient to minimize release of visible dust. Photo courtesy of OSHA The saw must be operated and maintained in accordance with manufacturer's instructions to minimize dust emissions. Focus on the following areas: • Check that hoses are securely connected and are not cracked or broken. . Adjust nozzles so that water goes to the blade and wets the cutting area. - Inspect the saw blade before use to be sure it is in good condition and does not show excessive wear. - Maintain and operating the saw's dust-control equipment based on the manufacturer's instructions. Clean up any slurry produced to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using, for ex…

[2] OSHA Fact Sheet - Control Of Silica Dust In Construction: Walk-Behind Milling Machines and Floor Grinders

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION Walk-Behind Milling Machines and Floor Grinders Using walk-behind milling machines and floor grinders on concrete or other silica- containing materials can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of airborne dust when using walk-behind milling machines and floor grinders as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. ## Engineering Control Method: Wet methods OR Vacuum Dust Collection Systems Two methods for controlling dust when using walk-behind milling machines and floor grinders are: (1) an integrated water delivery system that continuously delivers water to the cutting surface, or (2) a commercially available vacuum dust collection system. In each case the milling machine or grinder must be operated and maintained in accordance with manufacturer's instructions to minimize dust emissions. ## Wet Methods Use of wet methods effectively reduces the amount of silica dust that becomes airborne when milling or grinding silica containing materials because it controls the exposure at its source. The silica standard specifies the use of walk-behind milling machines and floor grinders that are equipped with an integrated water delivery system that continuously delivers water to the cutting surface. Employers are responsible for keeping equipment in good condition to minimize dust and for training workers on how to use the equipment. Make sure to: • Check that hoses are securely connected and are not cracked or broken. - Adjust nozzles so that water goes to the grinding surface or cut point. Water flow rates must be sufficient to minimize the release of visible dust. . Ensure an adequate supply of water is available. Clean up any slurry produced to preven…

[3] OSHA Fact Sheet - Control Of Silica Dust In Construction: Walk-Behind Saws

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION Walk-Behind Saws Using a walk-behind saw to cut masonry, concrete, stone, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of dust that gets into the air when using walk-behind saws as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. ## Engineering Control Method: Water continuously fed to saw blade ## Wet Cutting Wet cutting is an effective method to reduce exposure to silica dust when using walk-behind saws equipped with an integrated water delivery system that directs a continuous stream of water onto the blade where it wets the material being cut and reduces the amount of dust generated. These saws have built-in water tanks, or water is supplied to the saw from a source such as a hose connected to a faucet or portable tank. Water flow rates must be sufficient to minimize the release of visible dust. Worker using a walk-behind saw with an integrated water delivery system to cut asphalt roadway. The saw must be operated and maintained in accordance with manufacturer's instructions to minimize dust emissions. Focus on the following: • Check that hoses are securely connected and are not cracked or broken. • Adjust nozzles so that water goes to the blade and wets the cutting area. . Inspect the saw blade before use to be sure it is in good condition and does not show excessive wear. Clean up any slurry produced during wet cutting to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using, for example, shovels or a vacuum equipped with a HEPA filter. ## Indoors or in Enclosed Spaces Using wet methods indoors or in an enclosed area may not reliably keep exposure low, so e…

[4] Water Spray Control of Hazardous Dust When Breaking Concrete with a Jackhammer

Page 3

Open source document

Source excerpt

# Water Spray Control of Hazardous Dust When Breaking Concrete with a Jackhammer (cont.) ## Site Set-Up (cont.) In Figure 3. Water tank mounted on compressor trailer - Minimize the number of workers in the construction area where jackhammers are used. - Post signs to warn workers about the hazard and to inform them of required protective equipment. Workers should also be cautioned about icing, slips, and falls (particularly if they make a mud hole), and about ground faults for any electrical system in use. ■During jackhammer use, perform air monitoring of respirable crystalline silica exposures to make sure the engineering controls are working and to deter- mine whether workers need respiratory protection. ■Make medical examinations available to all workers exposed to crystalline silica. ## Engineering Controls ■Equip jackhammers with dust-reduction control de- vices such as the water-spray attachment described in this report. When a water-spray attachment can- not be used (for example, on the upper floor inside an occupied building), use other control measures such as a vacuum or other local exhaust ventilation (LEV) device [Echt et al. 2003]. Spraying the work area with a garden hose is not an appropriate replace- ment for the water-spray control. - Train workers in the proper use and maintenance of the dust-reduction device. Make sure that the con- trol is working properly and test the water flow rate before and after each shift; a watch with a second hand and a kitchen measuring cup could be used for this task. An 8-ounce cup should fill in about 40 sec- onds. ## Personal Hygiene and Protective Clothing ■Wash hands and face before eating, drinking, or smok- ing. Do not eat, drink, or use tobacco products in the work area. ■ Change into disposable or washable work clothes at the worksite. If possible, shower and change into clean clothes before leaving the worksite. If it is not possible to shower or change into clean clothes, use a vacuum to remo…

[5] IHSA Safety Tool Box talks

Page 117

Open source document

Source excerpt

# Silica ## Explain dangers Silica dust and particles are a hazard on many jobsites. Silica dust and particles are generated from - Cutting and drilling concrete - Sandblasting concrete - Cutting and drilling masonry • Grinding concrete and masonry - Sanding drywall. If we breathe silica dust and particles into our lungs often enough and long enough, we can get a disease caused silicosis. Silicosis is a disabling, progressive, non-reversible, and often deadly lung disease. You may show no symptoms in the early stages and severe breathing problems in the later stages. Many workers with silicosis can develop other health problems such as tuberculosis and lung cancer. They can also develop complications such as heart disease. ## Identify controls There are three basic ways to control silica dust on a site: 1. Prevent silica dust from getting in the air 2. Remove silica dust from the air 3. Prevent workers from inhaling silica dust. When you're doing a job that generates silica particles—or working close by-you need protection. - Wear a particulate respirator if no other control methods are available. Minimum protection is a half-facepiece air-purifying respirator with an N95 filter. As silica dust increases, you'll need more protection. - An N95 filtering facepiece respirator (i.e., dust mask) may be appropriate when doing short- duration tasks, when local exhaust ventilation is available on tools, or when working outside. • Required personal protective equipment also includes eye protection and clothing that covers the body. Gloves or barrier cream is recommended for workers with sensitive skin. - Use WATER whenever possible to control dust. Wet cutting and other wet methods can keep dust levels very low. • If water isn't practical, attach a dust collector to the tool or equipment. - Use a HEPA vacuum to clean the work area and your work clothes. Do not allow silica dust to accumulate. Never use dry sweeping methods or compressed air t…

[6] Hazard Alert: Silica

Page 1

Open source document

Source excerpt

HAZARD ALERT SILICA CPWR 【● THE CENTER FOR CONSTRUCTION RESEARCH AND TRAINING ## Are you in danger? Silica can be found in many building materials, including... ‣ sand - concrete - rock - mortar ‣ masonry - and some paints If you do the following to these materials... ‣ abrasive or sand blast grind - cut or saw - drill ▸ jackhammer - or crush/demolish Then the answer is YES. The dust around you contains silica - and breathing it can be deadly. ## Why it's deadly You can be in danger even if you don't see the dust. When you breathe dust that contains silica, the tiny particles damage your lungs. The lung disease silicosis can form in your lungs in as little as a few weeks of very high dust exposure. Even breathing small amounts over time can cause disease years later. By the time it gets hard to breathe, you are already sick and there is no cure for silicosis. Silica dust also causes lung cancer, increases your chance of getting tuberculosis, and has been linked to COPD and other illnesses. ## Learn more about silica: - Work Safely with Silica is a one-stop resource about exposures and controls including a free planning tool (www.silica-safe.org) - Occupational Safety and Health Administration's Final Rule to Protect Workers from Exposure to Respirable Crystalline Silica (https://www.osha.gov/ dsg/topics/silicacrystalline/construction.html) - The National Institute for Occupational Safety and Health (NIOSH) - Silica (https://www.cdc.gov/niosh/topics/ silica/) ## Protecting Yourself - Three Methods 1 ## Use Water Water can keep silica dust out of the air - and out of your lungs. Use tools with water attachments to control dust at the source. Water can also keep dust down during activities like sweeping and demolition. The International 2 ## Use a Vacuum Use tools with vacuum attachments to capture the dust right where it starts. Dust is drawn into a hood or cover attached to the tool, through a hose, and into a …

[7] Toolbox Talk: Silica

Page 1

Open source document

Source excerpt

CPWR TOOLBOX THE CENTER FOR CONSTRUCTION RESEARCH AND TRAINING TALK Silica is in many materials common at construction sites, such as sand, concrete, rock, mortar, and brick. During tasks that disturb these materials (cutting, grinding, blasting, and jackhammering, for example), dust containing crystalline silica can be released into the air. Workers who inhale this dust are at risk of developing serious, sometimes fatal illnesses such as a lung disease called silicosis, lung cancer, and chronic obstructive pulmonary disease (COPD). It has also been linked to illnesses such as kidney disease. ## Frank's Story Frank has been a laborer for 22 years. His work frequently involved cutting, jackhammering, and drilling concrete. Water or vacuums were not used to control the dust, and he rarely was given a respirator. He began to have shortness of breath, wheezing, and tiredness after even short periods of work. Frank went to the doctor and told him about his work history. The doctor had Frank's x-ray read by a certified Class B reader because of the possible silica exposure. The results helped in diagnosing Frank's silicosis. Have you ever been exposed to silica dust from the work you were doing or from work going on nearby? # Silica ## * How could this illness have been prevented? ## Remember This ➤ Use vacuums and/or water to reduce dust at the source, before it becomes airborne. When these controls are not enough, use respiratory protection. - Keep dust control systems in good working order, and check vacuum filters and hoses regularly to make sure they are not clogged. - Do not use sand (or other substances containing more than 1% crystalline silica) for abrasive blasting. Substitute less hazardous materials. - If a less hazardous material is not available, use the appropriate respiratory protection. ➤ Avoid eating, drinking, and smoking in areas where there is silica dust. A good practice is to first leave the dusty area and wash your hands and face. …

[8] OSHA Letter of Interpretation | Types of construction work excluded from the Silica standard

Page 2

Open source document

Source excerpt

# Occupational Safety and Health Administration (cont.) Note that during an inspection, an OSHA compliance safety and health officer might conduct sampling when he/she has reason to believe that exposures may reach or exceed the AL. The persistent presence of visible dust, an equipment malfunction, or another unexpected event that could affect employee exposures may indicate that it is no longer reasonable to expect employee exposures to remain below the AL. Question 2: Does the RCS construction standard apply to tasks like drilling holes in silica-containing materials with handheld drills or certain activities like manual or mechanical mixing of mortar or concrete if they are performed for short durations of time, e.g., 15 minutes or less per day? Response: The RCS construction standard does not include a specific exemption for RCS-generating tasks that involve only short-term exposures (e.g., tasks with exposures for 15 minutes a day or less). We recommend that you review the Frequently. Asked Questions ("FAQs") for Occupational Exposure to Respirable Crystalline Silica, 29 CFR 1926.1153, in the Construction Industry on OSHA's website,¹ specifically FAQ 2, which provides a detailed explanation for coverage under the standard of employees who perform silica-generating tasks for only 15 minutes or less a day. Question 3: The first entry in Table 1 of OSHA's RCS construction standard is titled "(i) Stationary masonry saws." The term "masonry" is not defined in the regulatory text. Would users of stationary tile saws that involve wet cutting methods, regardless of whether water is "fed" to the blade or if the blade simply runs partially submerged in water, be in compliance with the standard while using such saws when cutting porcelain, natural stone, and ceramic tile? Response: OSHA considers stationary tile saws used to cut silica-containing masonry materials such as porcelain, stone, and tile to be stationary masonry saws under the RCS construction standard (se…

[9] OSHA Fact Sheet - Control Of Silica Dust In Construction: Stationary Masonry Saws

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION # Stationary Masonry Saws Using a stationary masonry saw to cut bricks, concrete blocks, pavers, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled over time, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of airborne dust when using stationary masonry saws as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. ## Engineering Control Method: Water applied continuously to the saw blade ## Wet Cutting When using a stationary masonry saw, wet cutting with an integrated water delivery system that continuously feeds water to the blade is an effective way to reduce exposure to silica dust. Many stationary masonry saws come equipped with a water basin that holds several gallons of water. A pump recirculates the water through a nozzle that directs a continuous stream onto the blade where it wets the material being cut and reduces the amount of dust generated. FELK A worker cutting masonry block on a stationary masonry saw that continuously feeds water to the blade. The saw must be operated and maintained in accordance with the manufacturer's instructions to minimize dust emissions. Focus on the following areas: - Check that hoses are securely connected and are not cracked or broken. • Ensuring that water flows at the rates recommended by the manufacturer. Water flow rates must be sufficient to minimize the release of visible dust. - Adjust nozzles so that water goes to the blade and wets the cutting area. • Rinsing or replacing water filters at recommended intervals. • Replace basin water when it gets gritty or begins to silt up with dust. • Inspect the saw blade before use to be sure it is in good condition and does not show excessive wear. ## Indoors or in Enclosed Areas …

[10] OSHA Fact Sheet - Control Of Silica Dust In Construction: Rig-Mounted Core Saws or Drills

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION Rig-Mounted Core Saws or Drills The use of rig-mounted core saws or drills to cut holes in concrete, masonry, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled over time, the small particles of silica can irreversibly damage the lungs. This fact sheet describes methods to minimize the amount of airborne dust when using core saws or drills as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. ## Engineering Control Method: Water applied to cutting surface ## Wet Methods Wet cutting is an effective way to reduce the amount of silica dust when using a rig-mounted core saw or drill. Many types of core saws and drills come equipped with an integrated water delivery system that directs a continuous stream onto the blade/drill bit where it wets the material being drilled and reduces the amount of dust generated. Water flow rates must be sufficient to minimize the release of visible dust. The rig-mounted core saw or drill must be operated and maintained in accordance with manufacturer's instructions to minimize dust emissions. Focus on the following areas: • Check and make sure that hoses are securely connected and are not cracked or broken. • Adjust nozzles so that water goes to the blade and wets the cutting area. . Inspect the saw blade/drill bit to be sure it is in good condition and does not show excessive wear. Clean up any slurry produced to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using, for example, shovels or a wet vacuum equipped with a HEPA filter. ## Indoors or in Enclosed Areas Using wet methods indoors or in an enclosed area may not reliably keep exposure low, so extra ventilation may be needed to reduce visible airborne dust. Extra ventilation can be supplied by using: . Exhaust trunks • Portable e…

[11] It’s not just dust! What you should know about crystalline silica, silicosis, and Oregon OSHA silica rules

Page 9

Open source document

Source excerpt

# Regulated and restricted access areas ([redacted phone]) (cont.) ## The written exposure control plan (cont.) Exposure control at construction sites: For construction activities, you must designate a competent person to implement the written exposure control plan and reg- ularly inspect job sites, materials, and equipment. You can designate any of your employees to be a compe- tent person if the person: • Can identify silica dust hazards at the construction site - Is authorized to promptly eliminate or minimize the hazards at the site • Has the knowledge and ability to implement the written exposure control plan for the site Yearly review of written exposure control plan: You must review and evaluate the effectiveness of the written exposure control plan at least once a year and update it as necessary to ensure the information is current. Availability of the written exposure control plan: Allow the written exposure control plan to be viewed or cop- ied by each employee covered by Oregon OSHA's silica rules and their designated representatives. Abrasive blasting: If your employees do abrasive blast- ing that uses crystalline silica blasting agents you must follow all of the requirements for the written exposure control plan and the requirements in Oregon OSHA's ventilation rules (see [redacted phone].94). ## Respiratory protection ([redacted phone]) Employees exposed to silica dust must wear respirators when: • Engineering controls are being installed or work practice controls implemented and their exposures exceed the PEL - Engineering and work practice controls are not feasible and their exposures exceed the PEL • Engineering and work practice controls are not suf- ficient to keep their exposures at or below the PEL • They are working in a regulated or restricted access area When respirators are required, you must also have a respiratory protection program that meets the require- ments of Oregon OSHA's respiratory protection rules (see 1910.134). …

[12] OSHA Letter of Interpretation | Respirable Crystalline Silica Focused Inspection Initiative in the Engineered Stone Fabrication and Installation Industries

Page 4

Open source document

Source excerpt

# Occupational Safety and Health Administration (cont.) 。 Where workers are exposed above the PEL, CSHOS should inquire as to the location of regulated areas and ensure through interviews that the employer demarcates and limits access to any regulated area(s) and requires the use of respirators by workers in those areas. • Methods of Compliance (29 CFR § 1910.1053(f) and 29 CFR § 1926.1153(d)(3)). 。 o CSHOS should verify the dust controls and safer work methods employers use to protect workers from silica exposures above the PEL. According to the OSHA and NIOSH Hazard Alert, the following are control options for countertop manufacturing and finishing operations: 。 Using water spraying systems and remote-controlled tools at the impact site where a saw or grinder generates dust. 。 Large bridge or gantry-like saws usually use water sprays and can be remote-controlled for dust control and cooling. 。 Hand-held angle grinders can be modified to deliver water to the point of contact with the stone. 。 Wet-edge milling machines or stone routers can replace dry grinders in shops. They provide a clean edge profile with a diamond wheel. 。 Using hand tools (e.g., drills, masonry saws, grinders) equipped with a shroud and a vacuum with a high efficiency particulate air (HEPA)-filter when wet methods are not practicable. - o Installing local exhaust ventilation (LEV) systems at fixed locations to capture dust at its point of origin. 。 Using a combination of both water and ventilation controls, if necessary. 。 Using - wet sweeping or HEPA-filtered vacuuming instead of dry sweeping or compressed air. 。 Replacing water and air filters as needed in accordance with manufacturer's instructions to control dust. • Adjusting water flow as necessary to control dust, following manufacturers' recommendations for water flow rates. - o Pre-washing stone slabs prior to cutting. - o Implementing regular and thorough housekeeping procedures for water slurry and settled dust…

[13] Crystalline Silica Exposure

Page 1

Open source document

Source excerpt

WORK SAFE KENTUCKY Free safety resources provided by KEMI HOME SAFETY RESOURCES SAFETY TRAINING SAFETY BLOG ABOUT KEMI CONTACT US O # Crystalline Silica Exposure ## Print a Sign-In Sheet | Spanish Version ## What Is Crystalline Silica? Crystalline silica is a basic component of soil, sand, granite, and many other minerals. Quartz is the most common form of crystalline silica. Cristobalite and tridymite are two other forms of crystalline silica. All three forms may become respirable size particles when workers chip, cut, drill, or grind objects that contain crystalline silica. ## What Are the Hazards of Crystalline Silica? • Silica exposure remains a serious threat to nearly 2 million U.S. workers. - High-risk jobs include: abrasive blasting, foundry work, stonecutting, rock drilling, quarry work, and tunneling. - Crystalline silica has been classified as a human lung carcinogen. • Breathing crystalline silica dust can cause silicosis, which in severe cases can be disabling, or even fatal. • The respirable silica dust enters the lungs and causes the formation of scar tissue, thus reducing the lungs' ability take in oxygen. • There is no cure for silicosis. • Since silicosis affects lung function, it makes one more susceptible to lung infections like tuberculosis. In addition, smoking causes lung damage and adds to the damage caused by breathing silica dust. ## Where Are Construction Workers Exposed to Crystalline Silica? Exposure occurs during many different construction activities including: • Abrasive blasting with sand to remove paint and rust from bridges, tanks, concrete structures, and other surfaces. • Keep records of workers' silica exposure and medical exams. • Jackhammering. • Rock/well drilling. • Concrete mixing and drilling B. • Brick and concrete block cutting. ## Where Are General Industry Employees Exposed to Crystalline Silica Dust? General Industry exposures to crystalline silica result from a variety of manufacturing and ma…

[14] OSHA Fact Sheet - Control Of Silica Dust In Construction: Drivable Saws

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION ## Drivable Saws Using a drivable saw to cut masonry, concrete, stone, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of airborne dust when using drivable saws as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. Engineering Control Method: Water continuously fed to saw blade ## Wet Cutting Wet cutting is an effective method to reduce exposure to silica dust when outdoors using drivable saws equipped with an integrated water delivery system. This system directs a continuous stream of water onto the blade where it wets the materials being cut and reduces the amount of dust generated. These saws have built-in water tanks, or water is supplied to the saw from a source such as a hose connected to a faucet or portable tank. Water flow rates must be sufficient to minimize the release of visible dust. A construction worker cutting pavement using a drivable saw with an integrated water delivery system. The saw must be operated and maintained in accordance with manufacturers' instructions to minimize dust emissions. Focus on the following areas: • Check that hoses are securely connected and are not cracked or broken. . Adjust nozzles so that water goes to the blade and wets the cutting area. . Inspect the saw blade before use to be sure it is in good condition and does not show excessive wear. Clean up any slurry produced during wet cutting to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using shovels or a wet vacuum equipped with a HEPA filter. If employers operate drivable saws indoors or in an enclosed area, they must conduct an exposure assessment and may need to take…

[15] Toolbox Talk: Silica in Construction

Page 2

Open source document

Source excerpt

# SILICA IN CONSTRUCTION (cont.) ## HOW CAN YOU PROTECT YOURSELF FROM SILICA EXPOSURE IN THE WORKPLACE? • Employers are required to evaluate procedures to identify if they create silica dust and might overexpose you and conduct a silica exposure assessment to determine if respirable silica is present at or above the action level (25 μg/m3) and in what quantities in accordance with WAC [redacted identifier]. the • Use local exhaust or ventilation systems that capture the dust at the source and collect it in a system with HEPA filtration or water to reduce or eliminate dust at the source before it becomes airborne. When these controls are not enough, use respiratory protection. Routinely maintain dust control systems to keep them in good working order. • Use wet methods when cutting, grinding, or breaking concrete, brick, mortar, block, or similar materials. • Do not use sand or other substances containing more than 1% crystalline silica as abrasive blasting materials. Substitute less hazardous materials. - Use NIOSH-approved respirators when exposure cannot be maintained below the permissible exposure level (PEL) (50 μg/m3) in accordance with WAC 296- 842 for Respirators and WAC [redacted identifier]. - Wear disposable or washable work clothes and shower if facilities are available. Vacuum (equipped with HEPA filtration) the dust from your clothes and change them into clean clothing before leaving the work site. Do not brush or blow the dust off! Do not bring dust home! • Restrict access to areas on the site where silica dust is being generated. • Avoid eating, drinking, and smoking in areas where silica dust is present. Wash your hands and face outside dusty areas before performing any of these activities. - Restrict housekeeping practices, such as sweeping, blowing, or disturbing dust that may expose workers to silica where feasible alternatives are available. • Wet dust before sweeping or vacuum dust (with a dust collection system equipped with HEPA f…

[16] OSHA Fact Sheet - OSHA’s Respirable Crystalline Silica Standard for Construction

Page 1

Open source document

Source excerpt

OSHA FactSheet CONTROL SILICA DUST Breathe Easier # OSHA's Respirable Crystalline Silica Standard for Construction Workers who are exposed to respirable crystalline silica dust are at increased risk of developing serious silica-related diseases. OSHA's standard requires employers to take steps to protect workers from exposure to respirable crystalline silica. ## What is Respirable Crystalline Silica? Crystalline silica is a common mineral that is found in construction materials such as sand, stone, concrete, brick, and mortar. When workers cut, grind, drill, or crush materials that contain crystalline silica, very small dust particles are created. These tiny particles (known as "respirable" particles) can travel deep into workers' lungs and cause silicosis, an incurable and sometimes deadly lung disease. Respirable crystalline silica also causes lung cancer, other potentially debilitating respiratory diseases such as chronic obstructive pulmonary disease, and kidney disease. In most cases, these diseases occur after years of exposure to respirable crystalline silica. ## How are Construction Workers Exposed to Respirable Crystalline Silica? Exposure to respirable crystalline silica can occur during common construction tasks, such as using masonry saws, grinders, drills, jackhammers and handheld powered chipping tools; operating vehicle- mounted drilling rigs; milling; operating crushing machines; using heavy equipment for demolition or certain other tasks; and during abrasive blasting and tunneling operations. About two million construction workers are exposed to respirable crystalline silica in over 600,000 workplaces. ## What Does the Standard Require? The standard (29 CFR 1926.1153) requires employers to limit worker exposures to respirable crystalline silica and to take other steps to protect workers. Employers can either use a control method laid out in Table 1 of the construction standard, or they can measure workers' exposure to silica and independen…

[17] OSHA Fact Sheet - Control Of Silica Dust In Construction: Handheld Grinders for Tasks Other Than Mortar Removal

Page 2

Open source document

Source excerpt

# CONTROL OF SILICA DUST IN CONSTRUCTION Handheld Grinders for Tasks Other Than Mortar Removal (cont.) ## Make sure to: (cont.) Clean up any slurry produced to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using, for example, shovels or a wet vacuum equipped with a HEPA filter. ## Vacuum Dust Collection System (VDCS) Employers can also comply with Table 1 in the silica standard by using a VDCS to control dust when using a handheld grinder. Use a: . Commercially available shroud and dust collection system on the grinding wheel appropriate for the grinder and wheel size. . Vacuum that provides at least 25 cubic feet per minute (cfm) of airflow per inch of blade to capture dust at the point of grinding. For example, a 5" grinding wheel would require a rating of 125 cfm of air flow or more for effective capture. . Vacuum equipped with a cyclonic pre- separator or filter-cleaning mechanism with a filter that has 99 percent or greater collection efficiency for respirable-sized particles. - Vacuum exhaust hose capable of providing the airflow recommended by the tool manufacturer. A 1.5" to 2" diameter vacuum exhaust hose is typically adequate. Make sure to: - Keep the vacuum hose clear and free of debris, kinks, and tight bends. • Follow the equipment manufacturer's directions on how to reduce dust buildup on the filter. - Change vacuum-collection bags as directed by the manufacturer. Do not overfill the bag. • Set a regular schedule for maintenance and filter cleaning of the drill and VDCS. • Avoid exposure to dust when changing vacuum bags and cleaning or replacing air filters. Exhaust Hose Shroud Grinding Wheel Illustration courtesy of NIOSH Detail of grinder with vacuum dust collection system attachment. ## Respiratory Protection When properly used, wet methods can effectively control exposure to silica dust. Therefore, Table 1 does not require the use of respiratory protection when operating h…

[18] Local Emphasis Program for Respirable Crystalline Silica

Page 20

Open source document

Source excerpt

# TABLE OF CONTENTS (cont.) ## Construction Activities that May Involve RCS Exposure The following list is provided to help UOSH with focusing on construction worksites by listing operations likely to have exposures to RCS, as described in the Occupational Exposure to Respirable Crystalline Silica preamble, pages [redacted postal code] and [redacted postal code]: • Abrasive blasting - Drywall finishing • Earth drilling • Heavy equipment operations (excavating, grading, abrading, or fracturing RCS-containing materials, or demolishing concrete or masonry structures) - Concrete and masonry hole drilling using handheld or stand-mounted drills - Jackhammering and powered, handheld, chipping of concrete and masonry • Masonry, concrete, or fiber-cement board cutting using portable saws, walk-behind saws, drivable or ride-on saws, rig-mounts core saws and drills, or stationary saws • Milling of asphalt using portable or mobile machines, such as walk-behind milling machines, floor grinders, or drivable milling machines • Rock and concrete drilling using vehicle-mounted drilling rigs and dowel drilling rigs • Mobile concrete crushing machines • Tuckpointing and grinding using handheld grinders for mortar removal and other than mortar removal (Reference: 81 FR at [redacted postal code], [redacted postal code]) See also the specific equipment and tasks in the left-hand column of 29 CFR § 1926.1153(c)(1), Table 1, and the OSHA Small Entity Compliance Guide for the Respirable Crystalline Silica Standard for Construction, available at https://www.osha.gov/Publications/OSHA3902.pdf. For videos of several of these tasks, see the following: • Stationary Masonry Saws, https://www.youtube.com/watch?v=Eu0s4- ZLW91&feature=youtu.be • Handheld Power Saws, https://www.youtube.com/watch?v=pfYI31pF4Ng&feature=youtu.be • Handheld and Stand-Mounted Drills, https://www.youtube.com/watch?v=Yzo- SZ PSic&feature=youtu.be • Jackhammers or Handheld Powered Chipping Tools, https…

Related Q&A

Keep exploring.

Human questionUS

Write a toolbox talk on Moving and positioning drill rigs

Before moving or positioning a drill rig, conduct a documented pre-task hazard assessment/JSA covering overhead power lines, underground utilities, traffic, pedestrians, ground conditions, suspended loads, blind spots, swing radius, pinch points, and line-of-fire exposures. The source JSA for geotechnical drilling

Read the thread
Human questionGeneral

Generate HS Manual for Construction Project

Construction Project Health and Safety Manual ============================================= This manual outlines the health and safety requirements for the construction project. It details critical safety procedures, risk assessments, emergency response plans, and compliance measures to ensure a safe working

Read the thread
Human questionUS

Trenching Safety

Excavation and Trenching Safety =============================== *Date:** 2025-07-24 *Duration:** \[DURATION] minutes *Presenter:** \[PRESENTER NAME] *Location:** \[LOCATION] Objective The objective of this toolbox talk is to ensure all employees understand the hazards associated with excavation and trenching, and the

Read the thread
Human questionUS

What should a HSE Manager inspect when visiting a customers site?

Here's a checklist for HSE Managers when visiting a customer site, incorporating elements from OSHA standards relevant to Texas [1]: *HSE Manager Customer Site Inspection Checklist** *Purpose:** To ensure compliance with safety regulations and promote a safe working environment at customer sites. *Instructions:**

Read the thread
Human questionUS

do you know the em 385 standard

EM 385-1-1 is the U.S. Army Corps of Engineers Safety and Health Requirements Manual. In practice, it functions as a comprehensive construction and operational safety manual for Corps activities and operations, and it is widely treated as a governing safety document on USACE work. OSHA has recognized EM-385-1-1 by

Read the thread
Discussion thread

Add your experience.

Community answers can add practical context. They are moderated, but they are not SALUS-reviewed safety guidance.

New contributions are temporarily closed while the moderation queue is configured.

Community answers(0)

No community answers have been approved yet.

Comments on Rosie's answer(0)

No comments have been approved yet.

Ready to put operational safety to work?

Join 400K users across 150K sites already on SALUS.

Request a demo

No commitment · 30-minute personalized walkthrough