Safe Work Procedure: Silica Dust Control
Document Number: [SWP-NUMBER] Revision Date: [DATE] Next Review Date: [NEXT REVIEW DATE] Department: [DEPARTMENT NAME]
1. Scope
This Safe Work Procedure (SWP) outlines the necessary steps and precautions to control silica dust exposure in the workplace. It applies to all activities where silica-containing materials are disturbed, such as cutting, grinding, drilling, or crushing of concrete, stone, and other similar materials. This procedure aims to minimize the risk of respiratory health issues associated with silica dust inhalation. This SWP is applicable in all areas where such activities are performed. It should be used in conjunction with the product's Safety Data Sheet (SDS) .
2. Definitions
Silica Dust: Respirable crystalline silica (RCS) is very small particles of silica that can be inhaled deeply into the lungs.
Hazardous Substance: A substance that can cause harm to people's health or safety .
SDS (Safety Data Sheet): A document that provides information on the properties of hazardous chemicals and how they affect health and safety .
HEPA Filter: High-Efficiency Particulate Air filter, designed to capture very small particles.
3. Responsibilities
3.1 Supervisors
- Ensure workers are trained and competent in the safe work procedures for silica dust control.
- Provide the necessary equipment and PPE for workers to perform their tasks safely.
- Monitor work activities to ensure compliance with this SWP and relevant regulations.
- Ensure that up-to-date SDSs are available for all silica-containing materials .
3.2 Workers
- Follow the safe work procedures outlined in this SWP.
- Use the provided PPE properly and maintain it in good condition.
- Report any hazards or unsafe conditions to the supervisor immediately.
- Participate in training programs and pre-job briefings.
3.3 Health and Safety Representative
- Assist in the development and review of this SWP.
- Conduct workplace inspections to identify potential silica dust hazards.
- Provide recommendations for improving silica dust control measures.
4. Potential Hazards and Risks
| Hazard | Risk | Control Measures |
|---|---|---|
| Inhalation of silica dust | Silicosis, lung cancer, respiratory irritation | Use engineering controls (e.g., water suppression, ventilation), wear respirators, implement dust collection systems |
| Eye contact with silica dust | Eye irritation, corneal abrasion | Wear safety glasses or goggles |
| Skin contact with silica dust | Skin irritation | Wear gloves and protective clothing |
| Unguarded machinery | Lacerations, abrasions, crushing injuries | Ensure machinery is properly guarded and maintained |
| Slips, trips, and falls | Injuries ranging from minor to severe | Maintain good housekeeping, clear pathways, wear appropriate footwear |
5. Personal Protective Equipment (PPE)
Always use proper PPE .
- Respirator: Use an approved respirator (e.g., N95, P100) appropriate for the concentration of silica dust present. Ensure it is properly fitted and maintained .
- Safety Glasses/Goggles: Wear safety glasses with side shields or goggles to protect eyes from dust and debris.
- Gloves: Wear appropriate gloves to prevent skin contact and irritation.
- Protective Clothing: Wear long-sleeved shirts and pants to minimize skin exposure.
- Hearing Protection: If the equipment generates high noise levels, wear hearing protection.
Inspect PPE before each use for damage or defects. Replace damaged PPE immediately.
6. Equipment and Tools
Always use proper equipment and tools.
- Water Suppression Systems: Use water hoses, sprayers, or integrated water systems on tools to suppress dust at the source.
- Dust Collection Systems: Use vacuum systems with HEPA filters to capture dust generated by tools .
- Ventilation Systems: Use local exhaust ventilation to remove dust from the work area .
- Cutting/Grinding Tools: Use tools designed with dust extraction ports and shrouds.
- Respirator Fit Testing Equipment: Use equipment to ensure proper respirator fit.
Inspect equipment and tools before each use for damage or defects. Maintain equipment according to manufacturer's instructions.
7. Pre-Job Requirements
7.1 Training and Competency
- Workers must complete a silica awareness training program.
- Workers must be trained on the proper use and maintenance of PPE and equipment.
- Supervisors must be trained on their responsibilities for silica dust control.
7.2 Pre-Job Briefing
- Conduct a pre-job briefing to discuss the tasks, hazards, and control measures.
- Review the SDS for silica-containing materials .
- Confirm that all workers understand the safe work procedures.
7.3 Work Area Preparation
- Establish a designated work area with proper ventilation.
- Implement dust control measures (e.g., water suppression) before starting work.
- Ensure all necessary equipment and PPE are available and in good condition.
- Post warning signs to alert others of the potential silica dust hazard .
8. Safe Work Procedure Steps
8.1 Planning and Preparation
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Review the task to identify potential silica exposure.
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Select appropriate dust control methods (e.g., water suppression, ventilation).
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Ensure all workers are trained and equipped with the necessary PPE.
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Sub-step 8.1.1: Check the weather forecast and plan work to minimize dust exposure during dry and windy conditions.
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Sub-step 8.1.2: Ensure adequate lighting is available in the work area.
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Sub-step 8.1.3: Barricade the work area to prevent unauthorized access.
Safety considerations: Ensure all control measures are in place before starting work.
8.2 Dust Control Implementation
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Use water suppression techniques to wet down materials before cutting, grinding, or drilling.
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Operate dust collection systems to capture dust at the source.
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Use local exhaust ventilation to remove dust from the work area .
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Sub-step 8.2.1: Continuously monitor dust levels and adjust control measures as needed.
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Sub-step 8.2.2: Avoid dry sweeping or compressed air for cleaning; use wet methods or HEPA vacuums instead .
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Sub-step 8.2.3: Regularly inspect and maintain dust control equipment.
Safety considerations: Ensure dust control measures are effective and do not create other hazards (e.g., slips from excessive water).
8.3 Work Execution
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Perform tasks in a manner that minimizes dust generation.
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Keep the work area clean and free of accumulated dust.
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Use proper tools and equipment for the task.
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Sub-step 8.3.1: Avoid dropping materials from heights to prevent dust clouds.
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Sub-step 8.3.2: Use shrouds and dust extraction attachments on power tools.
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Sub-step 8.3.3: Position ventilation systems to capture dust away from workers' breathing zones.
Safety considerations: Maintain awareness of surroundings and potential dust exposure.
8.4 Cleanup and Disposal
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Clean the work area using wet methods or HEPA vacuums .
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Dispose of waste materials in sealed containers.
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Decontaminate tools and equipment before storage.
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Sub-step 8.4.1: Do not allow dust to accumulate on surfaces.
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Sub-step 8.4.2: Label waste containers appropriately.
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Sub-step 8.4.3: Follow local regulations for waste disposal .
Safety considerations: Prevent dust from becoming airborne during cleanup and disposal.
9. Precautions and Safety Measures
- Substitution: Use non-hazardous substances instead of hazardous ones whenever possible .
- Hygiene: Wash hands and face thoroughly after working with silica-containing materials .
- Housekeeping: Keep the work area clean to prevent dust accumulation.
- Equipment Maintenance: Regularly inspect and maintain dust control equipment.
- Air Monitoring: Conduct air monitoring to assess the effectiveness of control measures .
10. Emergency Procedures
10.1 General Emergency Response
- In case of a medical emergency, call [EMERGENCY PHONE NUMBER] immediately.
- Provide first aid as necessary.
- Evacuate the area if there is a significant release of silica dust.
10.2 Specific Emergency Scenarios
- Eye Exposure: Flush eyes with water for at least 15 minutes and seek medical attention.
- Inhalation: Move to fresh air and seek medical attention if experiencing respiratory distress.
- Skin Irritation: Wash affected area with soap and water. Seek medical attention if irritation persists.
10.3 Emergency Contact Information
- [Emergency Contact Name]: [PHONE NUMBER]
- [Health and Safety Department]: [PHONE NUMBER]
- [Local Hospital]: [PHONE NUMBER]
11. Incident Reporting and Investigation
Report all incidents, near-misses, and hazards to the supervisor immediately. Conduct a thorough investigation to determine the root cause and implement corrective actions.
12. References and Related Documents
- Canada Occupational Health and Safety Regulations (SOR/86-304) , , , , , ,
- WHMIS Safety Data Sheet (SDS) ,
- Equipment Operation and Maintenance Manuals , , , , , , , , , ,
Approved by: [NAME AND POSITION] Date: [APPROVAL DATE]
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