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Create a safe work procedure for silica dust control

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Published by SALUS

Respirable Crystalline 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 safety requirements for controlling respirable crystalline silica dust exposure during construction activities. It applies to all tasks that disturb silica-containing materials, such as concrete, brick, and mortar. The goal is to minimize worker exposure to respirable crystalline silica and prevent related health issues.

2\. Definitions

Respirable Crystalline Silica Quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particle-size- selective samplers specified in the International Organization for Standardization (ISO) 7708:1995\. [1]

Silica Process A process that could release uncombined silica, as defined in subsection 389(1\), in a crystalline form in concentrations likely to exceed the contamination limits. [12]

Specialist An American Board Certified Specialist in Pulmonary Disease or an American Board Certified Specialist in Occupational Medicine. [1]

3\. Responsibilities

3\.1 Supervisors

Ensure all workers are properly trained and competent to perform the task.
Provide all necessary PPE and ensure it is in good condition.
Enforce all safety procedures and guidelines.
Conduct regular site inspections to identify and correct hazards.
Ensure proper ventilation and dust control measures are in place.
Investigate all incidents and near misses.

3\.2 Workers

Use all required PPE as outlined in this procedure.
Participate in all required training sessions.
Report any equipment malfunctions or safety concerns to the supervisor immediately.
Follow all safety procedures and guidelines outlined in this document.
Cooperate with exposure monitoring and health surveillance programs.

4\. Potential Hazards and Risks

Hazard	Risk	Control Measures
Cutting concrete or masonry [1] [3]	Inhalation of respirable crystalline silica dust.	Use wet cutting methods to suppress dust. Ensure adequate water flow to the blade. Use tools equipped with integrated water delivery systems.
Drilling concrete or masonry [9] [9] [9]	Inhalation of respirable crystalline silica dust.	Use drills equipped with commercially available shrouds or cowlings with dust collection systems. Ensure dust collectors have filters with 99% or greater efficiency and filter-cleaning mechanisms. Use HEPA-filtered vacuums when cleaning holes.
Jackhammering or chipping concrete [9] [15]	Inhalation of respirable crystalline silica dust.	Use jackhammers with water delivery systems that supply a continuous stream or spray of water at the point of impact. Alternatively, use tools equipped with commercially available shrouds and dust collection systems.
Grinding concrete or masonry [8]	Inhalation of respirable crystalline silica dust.	Use grinders equipped with commercially available shrouds and dust collection systems. Ensure dust collectors provide adequate airflow and have filters with 99% or greater efficiency and a cyclonic pre-separator or filter-cleaning mechanism.
Operating crushing machines [2] [2] [2]	Inhalation of respirable crystalline silica dust.	Use equipment designed to deliver water spray or mist for dust suppression at the crusher and other points where dust is generated. Operate and maintain the machine in accordance with the manufacturer's instructions to minimize dust emissions. Use a ventilated booth or remote control station.
Operating heavy equipment and utility vehicles [2] [2]	Inhalation of respirable crystalline silica dust.	Apply water and/or dust suppressants as necessary to minimize dust emissions. When the equipment operator is the only employee engaged in the task, operate equipment from within an enclosed cab.
Operating small drivable milling machines [4] [4]	Inhalation of respirable crystalline silica dust.	Use machines equipped with supplemental water sprays designed to suppress dust. Water must be combined with a surfactant. Operate and maintain the machine to minimize dust emissions.

5\. Personal Protective Equipment (PPE)

All workers involved in tasks with potential silica exposure must wear appropriate personal protective equipment (PPE).

Respirator (NIOSH-approved): Provide respiratory protection in accordance with regulatory requirements. Ensure proper fit testing and training. [6]
Eye Protection: Wear safety glasses or goggles to protect eyes from dust and debris.
Gloves: Wear gloves to prevent skin contact with silica-containing materials. [13]

[14]

Protective Clothing: Wear long-sleeved shirts and pants to minimize skin exposure. [13]

[14]

Hard Hat: Wear a hard hat to protect from head injuries.
Safety Boots: Wear appropriate footwear to protect feet from hazards.

Inspect PPE before each use for damage or defects. Clean and maintain PPE according to the manufacturer's instructions. Replace damaged or worn PPE immediately.

6\. Equipment and Tools

All equipment and tools used during tasks with potential silica exposure must be inspected before use to ensure they are in safe operating condition.

Wet Saws: Use wet saws equipped with integrated water delivery systems to continuously feed water to the blade. [1]

[3]

Drills with Dust Collection: Use drills equipped with commercially available shrouds or cowlings with dust collection systems. [9]
Jackhammers with Water Delivery: Use jackhammers with water delivery systems that supply a continuous stream or spray of water at the point of impact. [9]
Grinders with Dust Collection: Use grinders equipped with commercially available shrouds and dust collection systems. [8]
HEPA-Filtered Vacuums: Use HEPA-filtered vacuums for cleaning work areas. [9]

Ensure that all tools and equipment are regularly inspected and maintained according to the manufacturer's recommendations. Defective equipment must be taken out of service immediately.

7\. Pre-Job Requirements

7\.1 Training and Competency

Training and Competency: All workers must receive training on the hazards of respirable crystalline silica, the proper use of control measures, and the requirements of this SWP. Training records must be maintained.

7\.2 Pre-Job Briefing

Pre-Job Briefing: Conduct a pre-job briefing with all workers to discuss the tasks, hazards, and control measures. Review this SWP and ensure everyone understands their roles and responsibilities.

7\.3 Work Area Preparation

Work Area Preparation: Establish a designated work area with clear hazard signs. Ensure adequate ventilation and dust control measures are in place before starting work. Keep the work area clean and free of obstructions.

8\. Safe Work Procedure Steps

Exposure Assessment: Assess the potential for silica exposure by identifying tasks that disturb silica-containing materials.
Engineering Controls: Select and implement appropriate engineering controls, such as wet cutting methods, dust collection systems, and ventilation.
- Ensure water flow is sufficient to minimize dust release.
- Verify dust collectors have adequate airflow and filter efficiency.
- Maintain ventilation systems to prevent dust accumulation.
Respiratory Protection: When engineering controls are not sufficient, provide appropriate respiratory protection. Ensure proper fit testing and training on respirator use.
PPE Requirements: Wear required PPE, including respirators, eye protection, and protective clothing.
Safe Work Practices: Position yourself upwind of dust sources whenever possible. Use tools and equipment in accordance with manufacturer's instructions to minimize dust emissions.
Housekeeping: Regularly clean the work area using wet methods or a HEPA-filtered vacuum. Avoid dry sweeping or using compressed air. [11]
Exposure Monitoring: Monitor worker exposure to respirable crystalline silica to ensure that control measures are effective. Document all monitoring results. [5]

[7]

Decontamination: After completing the task, remove work clothes and place them in a closed bag. Clean work clothes using a wet cloth or a vacuum cleaner equipped with a high-efficiency filter. [11]

9\. Precautions and Safety Measures

Implement engineering controls such as wet cutting methods, dust collection systems, and ventilation to minimize dust generation. - Ensure that all engineering controls are properly installed, maintained, and used correctly. [5]

[10]

Use work practices that minimize dust exposure, such as positioning workers upwind of dust sources and avoiding dry sweeping. - Train workers on proper work practices and ensure they are followed consistently.
Provide respiratory protection when engineering and work practice controls are not sufficient to reduce exposure to or below the permissible exposure limit (PEL). - Ensure that respirators are properly fitted, maintained, and used in accordance with a written respiratory protection program. [10]
Regularly clean work areas using wet methods or HEPA-filtered vacuums to prevent dust accumulation. - Avoid dry sweeping or using compressed air, which can create airborne dust. [12]
Monitor worker exposure to respirable crystalline silica to ensure that control measures are effective. - Conduct air sampling and analysis in accordance with established protocols. Provide workers with the opportunity to observe monitoring activities. [5]

[10]

10\. Emergency Procedures

10\.1 General Emergency Response

In the event of a dust exposure incident: 1\. Immediately move the affected worker to fresh air. 2\. If symptoms such as coughing, shortness of breath, or irritation of the eyes, nose, or throat develop, seek medical attention. 3\. Report the incident to the supervisor and safety department. 4\. Document the incident and any medical treatment provided.

10\.3 Emergency Contact Information

In case of emergency, contact emergency services immediately. Provide the location and nature of the incident. Follow established emergency response protocols.

11\. Incident Reporting and Investigation

All incidents, including near misses and potential exposures, must be reported to the supervisor immediately. A formal incident report must be completed and submitted to the safety department within 24 hours.

The safety department will investigate all reported incidents to determine the root cause and implement corrective actions to prevent recurrence. The investigation will involve interviews with involved personnel, site inspections, and review of relevant documentation.

Approved by: \[NAME AND POSITION]

Date: \[APPROVAL DATE]

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15 source record(s)

Sources used for this answer

[1] Sika - Sikasil WS-305 AM

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# Sikasil® WS-305 AM (cont.) ## SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION (cont.) Safety Data Sheet # Sikasil® WS-305 AM Jika ® Revision Date 11/20/2020 Print Date 02/26/2021 <table><tr><th>silicon dioxide, chemically prepared</th><th>112945-52-5</th><th>TWA (Dust)</th><th>20 Million parti- cles per cubic foot (Silica)</th><th>OSHA Z-3</th></tr><tr><td></td><td></td><td>TWA (Dust)</td><td>80 mg/m3 / %SiO2 (Silica)</td><td>OSHA Z-3</td></tr><tr><td>Quartz (SiO2)</td><td>[redacted postal code]-60-7</td><td>TWA (Res- pirable par- ticulate mat- ter)</td><td>0.025 mg/m3</td><td>ACGIH</td></tr><tr><td></td><td></td><td>TWA (Res- pirable dust)</td><td>0.05 mg/m3</td><td>OSHA Z-1</td></tr><tr><td></td><td></td><td>TWA (respir- able)</td><td>10 mg/m3 / %SiO2+2</td><td>OSHA Z-3</td></tr><tr><td></td><td></td><td>TWA (respir- able)</td><td>250 mppcf / %SiO2+5</td><td>OSHA Z-3</td></tr><tr><td></td><td></td><td>TWA (respir- able dust fraction)</td><td>0.1 mg/m3</td><td>OSHA P0</td></tr><tr><td></td><td></td><td>TWA (Res- pirable par- ticulate mat- ter)</td><td>0.025 mg/m3 (Silica)</td><td>ACGIH</td></tr><tr><td></td><td></td><td>TWA (respir- able dust fraction)</td><td>0.1 mg/m3</td><td>OSHA P0</td></tr><tr><td></td><td></td><td>TWA (Res- pirable par- ticulate mat- ter)</td><td>0.025 mg/m3</td><td>ACGIH</td></tr><tr><td></td><td></td><td>TWA (Res- pirable par- ticulate mat- ter)</td><td>0.025 mg/m3 (Silica)</td><td>ACGIH</td></tr></table> The above constituents are the only constituents of the product which have a PEL, TLV or other rec- ommended exposure limit. At this time, the other constituents have no known exposure limits. ## Engineering measures : Use of adequate ventilation should be sufficient to control worker exposure to airborne contaminants. If the use of this product generates dust, fumes, gas, vapor or mist, use pro- cess enclosures, local exhaust ventilation or other engineer- ing controls to keep worker exposure below any recommend- ed or statu…

[2] Construction Safety and Health Standards (MIOSHA)

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# 1926.1153 RESPIRABLE CRYSTALLINE SILICA PARAGRAPHS (C) THROUGH (J) ## 1926.1153(c) SPECIFIED EXPOSURE CONTROL METHODS 1926.1153(c)(1) For each employee engaged in a task identified on Table 1, the employer shall fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task on Table 1, unless the employer assesses and limits the exposure of the employee to respirable crystalline silica in accordance with paragraph (d) of this section. <table><tr><th colspan="4">Table 1 Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica</th></tr><tr><td rowspan="2">Equipment/task</td><td rowspan="2">Engineering and work practice control methods</td><td colspan="2">Required respiratory protection and minimum assigned protection factor (APF)</td></tr><tr><td>≤4 hours/shift</td><td>>4 hours/shift</td></tr><tr><td>(i) Stationary masonry saws</td><td>Use saw equipped with integrated water delivery system that continuously feeds water to the blade Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions</td><td>None</td><td>None</td></tr><tr><td rowspan="4">(ii) Handheld power saws (any blade diameter)</td><td>Use saw equipped with integrated water delivery system that continuously feeds water to the blade</td><td></td><td></td></tr><tr><td>Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions:</td><td></td><td></td></tr><tr><td>-When used outdoors</td><td>None</td><td>APF 10</td></tr><tr><td>-When used indoors or in an enclosed area</td><td>APF 10</td><td>APF 10</td></tr><tr><td>(iii) Handheld power saws for cutting fiber-cement board (with blade diameter of 8 inches or less)</td><td>For tasks performed outdoors only: Use saw equipped with commercially available dust collection system Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions Dust col…

[3] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) <table><tr><th>(vii) Handheld and stand- mounted</th><th>Use drill equipped with commercially available shroud or cowling</th><th>None</th><th>None.</th></tr><tr><td>drills (including impact and rotary</td><td>with dust collection system</td><td></td><td></td></tr><tr><td>hammer drills)</td><td></td><td></td><td></td></tr><tr><td></td><td>Operate and maintain tool in accordance with manufacturer's</td><td></td><td></td></tr><tr><td></td><td>instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>Dust collector must provide the air flow recommended by the tool</td><td></td><td></td></tr><tr><td></td><td>manufacturer, or greater, and have a filter with 99% or greater</td><td></td><td></td></tr><tr><td></td><td>efficiency and a filter-cleaning mechanism</td><td></td><td></td></tr><tr><td></td><td>Use a HEPA-filtered vacuum when cleaning holes</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(viii) Dowel drilling rigs for concrete</td><td>For tasks performed outdoors only:</td><td></td><td></td></tr><tr><td></td><td>Use shroud around drill bit with a dust collection system. Dust</td><td>APF 10</td><td>APF 10.</td></tr><tr><td></td><td>collector must have a filter with 99% or greater efficiency and a</td><td></td><td></td></tr><tr><td></td><td>filter-cleaning mechanism</td><td></td><td></td></tr><tr><td></td><td>Use a HEPA-filtered vacuum when cleaning holes</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(ix) Vehicle-mounted drilling rigs for</td><td>Use dust collection system with close capture hood or shroud around</td><td>None</td><td>None.</td></tr><tr><td>rock and concrete</td><td>drill bit with a low-flow water spray to wet the dust at the discharge</td><td></td><td></td></tr><tr><td></td><td>point from the dust collector</td><td></td><td></td></tr><tr><td></td><td>OR</td><td></td><td></td></tr><t…

[4] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) <table><tr><th></th><th>Dust collector must provide the air flow recommended by the</th><th></th><th></th></tr><tr><td></td><td>manufacturer, or greater, and have a filter with 99% or greater</td><td></td><td></td></tr><tr><td></td><td>efficiency and a filter-cleaning mechanism</td><td></td><td></td></tr><tr><td></td><td>When used indoors or in an enclosed area, use a HEPA-filtered</td><td></td><td></td></tr><tr><td></td><td>vacuum to remove loose dust in between passes</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(xiv) Small drivable milling</td><td>Use a machine equipped with supplemental water sprays designed to</td><td>None</td><td>None.</td></tr><tr><td>machines (less than half- lane)</td><td>suppress dust. Water must be combined with a surfactant</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain machine to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(xv) Large drivable milling machines</td><td>For cuts of any depth on asphalt only: Use machine equipped with</td><td>None</td><td>None.</td></tr><tr><td>(half-lane and larger)</td><td>exhaust ventilation on drum enclosure and supplemental water sprays</td><td></td><td></td></tr><tr><td></td><td>designed to suppress dust</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain machine to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>For cuts of four inches in depth or less on any substrate:</td><td></td><td></td></tr><tr><td></td><td>Use machine equipped with exhaust ventilation on drum enclosure</td><td>None</td><td>None.</td></tr><tr><td></td><td>and supplemental water sprays designed to suppress dust</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain machine to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>OR</td><td></td><td></td></tr><tr><td></td><td>Use a mac…

[5] Construction Safety and Health Standards (MIOSHA)

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# Table 1 Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica (cont.) ## 1926.1153(d) ALTERNATIVE EXPOSURE CONTROL METHODS (cont.) 1926.1153(d)(2)(v) Methods of sample analysis. The employer shall ensure that all samples taken to satisfy the monitoring requirements of paragraph (d)(2) of this section are evaluated by a laboratory that analyzes air samples for respirable crystalline silica in accordance with the procedures in Appendix A to this section. - 1926.1153(d)(2)(vi) Employee notification of assessment results. 1926.1153(d)(2)(vi)(A) Within five working days after completing an exposure assessment in accordance with paragraph (d)(2) of this section, the employer shall individually notify each affected employee in writing of the results of that assessment or post the results in an appropriate location accessible to all affected employees. 1926.1153(d)(2)(vi)(B) Whenever an exposure assessment indicates that employee exposure is above the PEL, the employer shall describe in the written notification the corrective action being taken to reduce employee exposure to or below the PEL. 1926.1153(d)(2)(vii) Observation of monitoring. 1926.1153(d)(2)(vi)(A) Where air monitoring is performed to comply with the requirements of this section, the employer shall provide affected employees or their designated representatives an opportunity to bserve any monitoring of employee exposure to respirable crystalline silica. 1926.1153(d)(2)(vi)(B) When observation of monitoring requires entry into an area where the use of protective clothing or equipment is required for any workplace hazard, the employer shall provide the observer with protective clothing and equipment at no cost and shall ensure that the observer uses such clothing and equipment. ## 1926.1153(d)(3) Methods of compliance 1926.1153(d)(3)(i) Engineering and work practice controls. The employer shall use engineering and work practice controls to reduce and maintain em…

[6] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) <table><tr><th></th><th></th><th></th><th></th></tr><tr><td>(xvi) Crushing machines</td><td>Use equipment designed to deliver water spray or mist for dust</td><td>None</td><td>None.</td></tr><tr><td></td><td>suppression at crusher and other points where dust is generated (e.g.,</td><td></td><td></td></tr><tr><td></td><td>hoppers, conveyers, sieves/sizing or vibrating components, and</td><td></td><td></td></tr><tr><td></td><td>discharge points)</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain machine in accordance with manufacturer's</td><td></td><td></td></tr><tr><td></td><td>instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>Use a ventilated booth that provides fresh, climate-controlled air to</td><td></td><td></td></tr><tr><td></td><td>the operator, or a remote control station</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(xvii) Heavy equipment and utility</td><td>Operate equipment from within an enclosed cab When employees</td><td>None</td><td>None.</td></tr><tr><td>vehicles used to abrade or</td><td>outside of the cab are engaged in the task, apply water and/or</td><td></td><td></td></tr><tr><td>fracture silica-containing materials</td><td>dust suppressants as necessary to minimize dust emissions</td><td></td><td></td></tr><tr><td>(e.g., hoe-ramming, rock ripping)</td><td></td><td></td><td></td></tr><tr><td>or used during demolition activities</td><td></td><td></td><td></td></tr><tr><td>involving silica- containing</td><td></td><td></td><td></td></tr><tr><td>materials</td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(xviii) Heavy equipment and utility</td><td>Apply water and/or dust suppressants as necessary to minimize dust</td><td>None</td><td>None.</td></tr><tr><td>vehicles for tasks such as grading</td><td>emissions OR</td><td></td><td></td></tr><tr><td>and ex…

[7] LATICRETE - 253 Gold Rapid II

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# 253 Gold Rapid Safety Data Sheet According To Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules And Regulations And According To The Hazardous Products Regulation (February 11, 2015). <table><tr><th>Québec</th><th>VEMP (mg/m3)</th><th>5 mg/m3 (containing no Asbestos and <1% Crystalline silica-respirable dust)</th></tr><tr><td>Saskatchewan</td><td>OEL STEL (mg/m3)</td><td>4 mg/m3 (respirable fraction)</td></tr><tr><td>Saskatchewan</td><td>OEL TWA (mg/m³)</td><td>2 mg/m3 (respirable fraction)</td></tr><tr><td>Yukon</td><td>OEL STEL (mg/m³)</td><td>20 mg/m3</td></tr><tr><td>Yukon</td><td>OEL TWA (mg/m³)</td><td>30 mppcf 10 mg/m3</td></tr><tr><td>Calcium sulfate (7778-18-9)</td><td colspan="2"></td></tr><tr><td>USA ACGIH</td><td>ACGIH TWA (mg/m3)</td><td>10 mg/m3 (inhalable particulate matter)</td></tr><tr><td>USA OSHA</td><td>OSHA PEL (TWA) (mg/m3)</td><td>15 mg/m3 (total dust) 5 mg/m3 (respirable fraction)</td></tr><tr><td>USA NIOSH</td><td>NIOSH REL (TWA) (mg/m3)</td><td>10 mg/m3 (total dust) 5 mg/m3 (respirable dust)</td></tr><tr><td>Alberta</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3</td></tr><tr><td>British Columbia</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3 (inhalable)</td></tr><tr><td>Manitoba</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3 (inhalable particulate matter)</td></tr><tr><td>New Brunswick</td><td>OEL TWA (mg/m3)</td><td>10 mg/m3 (particulate matter containing no Asbestos and <1% Crystalline silica)</td></tr><tr><td>Newfoundland & Labrador</td><td>OEL TWA (mg/m3)</td><td>10 mg/m3 (inhalable particulate matter)</td></tr><tr><td>Nova Scotia</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3 (inhalable particulate matter)</td></tr><tr><td>Nunavut</td><td>OEL STEL (mg/m3)</td><td>20 mg/m3 20 mg/m3</td></tr><tr><td>Nunavut</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3 10 mg/m3</td></tr><tr><td>Northwest Territories</td><td>OEL STEL (mg/m3)</td><td>20 mg/m3 20 mg/m3</td></tr><tr><td>Northwest Territories</td><td>OEL TWA (mg/m³)</td><td>10 mg/m3 10 mg/…

[8] Occupational Health and Safety Regulations (Nu Reg 003-2016)

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# Asbestos Waste (cont.) ## Interpretation (cont.) "silica process" means a process that could release uncombined silica, as defined in subsection 389(1), in a crystalline form in concentrations likely to exceed the contamination limits set out in Schedule O, such as (a) sandblasting as defined in subsection 390(1), (b) the freeing of the castings from adherent sand or other substance containing more than 5% uncombined silica, such as the removal of cores and the general smoothing of the castings when that freeing is done, but excluding the freeing of castings from scale formed during annealing or heat treatment, (c) the abrasive blasting, grinding or dressing of a surface containing more than 5% uncombined silica, including the engraving or abrasive cleaning of gravestones or structures, (d) the getting, cutting, splitting, crushing, grinding, milling, drilling, sieving or other mechanical manipulation of gravel or other siliceous stone or rock containing more than 5% uncombined silica, (e) a process where silica flour is used, or (f) the manufacture of silica-containing bricks and the dismantling or repair of silica-containing refractory linings of furnaces. (travaux de silice) ## Application of Part 381. This Part applies to a work site where a silica process is used. ## Warning of Workers 382. An employer shall warn workers who are likely to be engaged in a silica process or are likely to be exposed to silica dust of the dangers to health from the inhalation of dust containing silica. - Cleaning of Blasting Equipment 383. An employer shall take reasonable steps to prevent the inhalation of silica dust or the dissemination of silica dust into the air at the work site during the cleaning or maintenance of blasting equipment, blasting enclosure, ventilating system or separating equipment. - Cleaning of Work Sites 384. An employer shall ensure that a work site, where dust from a silica process could affect the health or safety of a worker, is re…

[9] LATICRETE - 253 Gold Rapid I

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[10] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) <table><tr><th>other than mortar removal</th><th>integrated water delivery system that continuously feeds</th><th></th><th></th></tr><tr><td></td><td>water to the grinding surface</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain tool in accordance with manufacturer's</td><td></td><td></td></tr><tr><td></td><td>instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>OR</td><td></td><td></td></tr><tr><td></td><td>Use grinder equipped with commercially available shroud and dust</td><td></td><td></td></tr><tr><td></td><td>collection system</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain tool in accordance with manufacturer's</td><td></td><td></td></tr><tr><td></td><td>instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>Dust collector must provide 25 cubic feet per minute (cfm) or greater</td><td></td><td></td></tr><tr><td></td><td>of airflow per inch of wheel diameter and have a filter with 99% or</td><td></td><td></td></tr><tr><td></td><td>greater efficiency and a cyclonic pre- separator or</td><td></td><td></td></tr><tr><td></td><td>filter-cleaning mechanism:</td><td></td><td></td></tr><tr><td></td><td>-When used outdoors</td><td>None</td><td>None.</td></tr><tr><td></td><td>-When used indoors or in an enclosed area</td><td>None</td><td>APF 10.</td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(xiii) Walk-behind milling machines</td><td>Use machine equipped with integrated water delivery system that</td><td>None</td><td>None.</td></tr><tr><td>and floor grinders</td><td>continuously feeds water to the cutting surface</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain tool in accordance with manufacturer's</td><td></td><td></td></tr><tr><td></td><td>instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td></td><td>OR</td><td></td><td></td></tr><tr><td></td><t…

[11] Construction Safety and Health Standards (MIOSHA)

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# Table 1 Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica (cont.) 926.1153(c)(2) When implementing the control measures specified in Table 1, each employer shall: 926.1153(c)(2)(i) For tasks performed indoors or in enclosed areas, provide a means of exhaust as needed to minimize the accumulation of visible airborne dust; 26.1153(c)(2)(ii) For tasks performed using wet methods, apply water at flow rates sufficient to minimize release of visible dust; 6.1153(c)(2)(iii) For measures implemented that include an enclosed cab or booth, ensure that the enclosed cab or booth: 1926.1153(c)(2)(iii)(A) Is maintained as free as practicable from settled dust; 1926.1153(c)(2)(iii)(B) Has door seals and closing mechanisms that work properly; 1926.1153(c)(2)(iii)(C) Has gaskets and seals that are in good condition and working properly; 1926.1153(c)(2)(iii)(D) Is under positive pressure maintained through continuous delivery of fresh air; 1926.1153(c)(2)(iii)(E) Has intake air that is filtered through a filter that is 95% efficient in the 0.3-10.0 um range (e.g., MERV-16 or better); and 1926. 1153(c)(2)(iii)(F) Has heating and cooling capabilities. - 1926.1153(c)(3) Where an employee performs more than one task on Table 1 during the course of a shift, and the total duration of all tasks combined is more than four hours, the required respiratory protection for each task is the respiratory protection specified for more than four hours per shift. If the total duration of all tasks on Table 1 combined is less than four hours, the required respiratory protection for each task is the respiratory protection specified for less than four hours per shift. ## 1926.1153(d) ALTERNATIVE EXPOSURE CONTROL METHODS For tasks not listed in Table 1, or where the employer does not fully and properly implement the engineering controls, work practices, and respiratory protection described in Table 1: 1926. 1153(d)(1) Permissible exposure limit (PEL) The…

[12] Safety Code for the Construction Industry (CQLR c. S-2.1, r.4)

Page 114

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# OCCUPATIONAL HEALTH AND SAFETY — CONSTRUCTION - SAFETY CODE (b) the work that exposes workers to crystalline silica dust; (c) the effects of exposure to crystalline silica dust on health; (d) safe working methods and procedures; (e) the use and care of control equipment and tools for crystalline silica dust; (f) the wearing and care of individual and common protective equipment. The information and training provided for in the first paragraph must have previously been established in writing. O.C. 820-2023, S. 4. 3.25.8. Delimitation of the work area: When the work provided for in section 3.25.6 is carried out, the work area must be delimited by hazard signs. The delimitation must allow workers outside the work area to remain at a safe distance from the area where the work is carried out. Only workers wearing a protective respiratory apparatus in compliance with section 3.25.6 may access that work area. O.C. 820-2023, S. 4. 3.25.9. Cleaning of work clothes: Before leaving the work area referred to in section 3.25.8, the worker must remove the work clothes worn and place them in a closed bag supplied by the employer or clean them using either a wet cloth or a vacuum cleaner equipped with a high-efficiency filter. O.C. 820-2023, S. 4. 3.25.10. Cleaning: When the work area and equipment are being cleaned, it is prohibited to use work methods that may cause dust from materials presumed to contain or containing crystalline silica to become suspended in the air, such as dry sweeping or the use of compressed air. Cleaning must be carried out by means of wetting or using a vacuum cleaner equipped with a high- efficiency filter. O.C. 820-2023, S. 4. 3.25.11. Debris of materials: Where work is carried out in a building, the debris of materials presumed to contain or containing crystalline silica that is liable to become dispersed in the air must be wetted or placed in closed containers and clearly identified. Where work is carried out outside, as defined i…

[13] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) meet this requirement. In representative sampling, the employer shall sample the employee(s) who are expected to have the highest exposure to respirable crystalline silica. 2. If initial monitoring indicates that employee exposures are below the action level, the employer may discontinue monitoring for those employees whose exposures are represented by such monitoring. 3. Where the most recent exposure monitoring indicates that employee exposures are at or above the action level but at or below the PEL, the employer shall repeat such monitoring within six months of the most recent monitoring. 4. Where the most recent exposure monitoring indicates that employee exposures are above the PEL, the employer shall repeat such monitoring within three months of the most recent monitoring. 5. Where the most recent (non-initial) exposure monitoring indicates that employee exposures are below the action level, the employer shall repeat such monitoring within six months of the most recent monitoring until two consecutive measurements, taken seven or more days apart, are below the action level, at which time the employer may discontinue monitoring for those employees whose exposures are represented by such monitoring, except as otherwise provided in subsection (d)(2)(D). (D) Reassessment of exposures. The employer shall reassess exposures whenever a change in the production, process, control equipment, personnel, or work practices may reasonably be expected to result in new or additional exposures at or above the action level, or when the employer has any reason to believe that new or additional exposures at or above the action level have occurred. (E) Methods of sample analysis. The employer shall ensure that all samples taken to satisfy the monitoring requirements of subsection (d)(2) are evaluated by a laboratory that analyzes air samples for respirable crystalline silica in accordance with …

[14] Construction Safety and Health Standards (MIOSHA)

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# Table 1 Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica <table><tr><th rowspan="2">Equipment/task</th><th rowspan="2">Engineering and work practice control methods</th><th colspan="2">Required respiratory protection and minimum assigned protection factor (APF)</th></tr><tr><td><4 hours/shift</td><td>>4 hours/shift</td></tr><tr><td>(viii) Dowel drilling rigs for concrete</td><td>For tasks performed outdoors only: Use shroud around drill bit with a dust collection system. Dust collector must have a filter with 99% or greater efficiency and a filter-cleaning mechanism Use a HEPA-filtered vacuum when cleaning holes</td><td>APF 10</td><td>APF 10</td></tr><tr><td rowspan="3">(ix) Vehicle-mounted drilling rigs for rock and concrete</td><td>Use dust collection system with close capture hood or shroud around drill bit with a low-flow water spray to wet the dust at the discharge point from the dust collector</td><td>None</td><td>None</td></tr><tr><td>OR</td><td></td><td></td></tr><tr><td>Operate from within an enclosed cab and use water for dust suppression on drill bit</td><td>None</td><td>None</td></tr><tr><td rowspan="8">(x) Jackhammers and handheld powered chipping tools</td><td>Use tool with water delivery system that supplies a continuous stream or spray of water at the point of impact:</td><td></td><td></td></tr><tr><td>-When used outdoors</td><td>None</td><td>APF 10</td></tr><tr><td>-When used indoors or in an enclosed area</td><td>APF 10</td><td>APF 10</td></tr><tr><td>OR</td><td></td><td></td></tr><tr><td>Use tool equipped with commercially available shroud and dust collection system Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions</td><td></td><td></td></tr><tr><td>Dust collector must provide the air flow recommended by the tool manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism:</td><td></td><td></td></t…

[15] Construction Safety Orders (CAL/OSHA)

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## § 1532.3. Occupational Exposures to Respirable Crystalline Silica. (cont.) Respirable Crystalline Silica means quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particle-size- selective samplers specified in the International Organization for Standardization (ISO) 7708:1995: Air Quality - Particle Size Fraction Definitions for Health-Related Sampling. Specialist means an American Board Certified Specialist in Pulmonary Disease or an American Board Certified Specialist in Occupational Medicine. This Section means this respirable crystalline silica standard, Section 1532.3. (c) Specified exposure control methods. (1) For each employee engaged in a task identified on Table 1, the employer shall fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task on Table 1, unless the employer assesses and limits the exposure of the employee to respirable crystalline silica in accordance with subsection (d). Table 1 - Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica <table><tr><th></th><th></th><th colspan="2">Required respiratory</th></tr><tr><td></td><td></td><td colspan="2">protection and mimimum</td></tr><tr><td></td><td></td><td colspan="2">assigned protection factor</td></tr><tr><td>Equipment/task</td><td>Engineering and work practice control methods</td><td>(APF)</td><td></td></tr><tr><td></td><td></td><td>≤ 4 hours/shift</td><td>> 4 hours/shift</td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>(i) Stationary masonry saws</td><td>Use saw equipped with integrated water delivery system that</td><td>None</td><td>None.</td></tr><tr><td></td><td>continuously feeds water to the blade</td><td></td><td></td></tr><tr><td></td><td>Operate and maintain tool in accordance with manufacturer's</td><td></td><td></td></tr><tr><td><…

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Original answer: Jul 25, 2025

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3\.1 Supervisors

3\.2 Workers

7\.1 Training and Competency

7\.2 Pre-Job Briefing

7\.3 Work Area Preparation

10\.1 General Emergency Response

10\.3 Emergency Contact Information

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