HSA Ireland – Crystalline Silica Dust

A Practical Guide to Controlling Respirable Crystalline Silica (RCS) at Work

 

LEVCentral Expert Commentary

Respirable Crystalline Silica (RCS) remains one of the most significant occupational health hazards affecting workers throughout Europe. Although this information sheet has been produced by the Health and Safety Authority (HSA) Ireland, the advice it contains is equally applicable to UK workplaces and closely reflects the principles contained within the UK’s Control of Substances Hazardous to Health (COSHH) Regulations and HSE guidance.

The HSA information sheet provides a concise but comprehensive overview of crystalline silica, explaining where exposure occurs, the diseases it can cause and the practical measures employers should implement to reduce risk. It is particularly useful because it presents technical information in a format that can easily be understood by employers, supervisors and employees alike.

For LEV professionals, the document reinforces one of the most important principles in occupational hygiene:

Respirable crystalline silica is too small to see, yet it can cause permanent and life-changing lung disease.

Consequently, effective engineering controls—including Local Exhaust Ventilation (LEV) and water suppression—must be considered essential components of any silica control strategy rather than optional additions.

View HSA Guidance

Key Learning Points

The information sheet explains:

• What crystalline silica is.
• Where respirable crystalline silica (RCS) is encountered.
• Industries at risk, including:
  • Construction.
  • Quarrying.
  • Mining.
  • Foundries.
  • Brick and tile manufacture.
  • Ceramics.
  • Stone masonry.
  • Demolition.
• How respirable silica enters the lungs.
• The Occupational Exposure Limit.
• Health effects including:
  • Chronic silicosis.
  • Accelerated silicosis.
  • Acute silicosis.
  • Lung cancer.
• The importance of risk assessment.
• Applying the Hierarchy of Control.
• Water suppression techniques.
• Local Exhaust Ventilation (LEV).
• Containment measures.
• Respiratory Protective Equipment (RPE).
• Face-fit testing.
• Health surveillance.
• Safe systems of work.

Source Information

Organisation: Health and Safety Authority (HSA), Ireland

Document: Crystalline Silica Dust – Information Sheet

Publication Date: January 2022

Document Type: Information Sheet

Primary Topics: Respirable Crystalline Silica, Silicosis, Lung Cancer, LEV, Water Suppression, COSHH Principles, Occupational Hygiene.

Audience: Employers, Construction Companies, Quarry Operators, Stonemasons, Foundries, Ceramic Manufacturers, LEV Designers, Occupational Hygienists and Health & Safety Professionals.

LEVCentral Perspective

Although this publication originates from Ireland, readers in the UK will find that its recommendations closely mirror HSE guidance.

The document follows the same hierarchy promoted under COSHH:

• assess the risk;
• eliminate or substitute where possible;
• use engineering controls;
• provide suitable respiratory protection where necessary; and
• support these measures with health surveillance.

One particularly valuable aspect is the explanation of the three forms of silicosis—chronic, accelerated and acute. Many workers assume silica-related disease only develops after decades of exposure. The HSA highlights that very high exposures can result in accelerated or acute disease developing much more rapidly, emphasising why effective dust control is needed from the very first day of exposure.

The guidance also reminds employers that LEV is rarely the sole engineering solution. The most effective silica control usually combines wet working methods, source extraction, good housekeeping, appropriate RPE and health surveillance within a single management programme.

Further Resources

For UK readers, this HSA publication is well supported by a comprehensive range of HSE guidance, including:

• HSG201 – Controlling Exposure to Stone Dust
• INDG463 – Control of Exposure to Silica Dust
• EH40 – Workplace Exposure Limits
• Health Surveillance for Those Exposed to Respirable Crystalline Silica (G404)
• HSE ST Series – Silica Guidance for Stonemasonry
• HSE QY Series – Silica Guidance for Quarries
• COSHH Essentials – Silica Direct Advice Sheets
• HSG258 – Controlling Airborne Contaminants at Work

Recommended Learning

• M200 Basic Principles in Occupational Hygiene
• M501 Measurement of Hazardous Substances
• M505 Control of Hazardous Substances
• M507 Health Effects of Hazardous Substances
• P304 Fundamentals of CoSHH Risk Assessment & Control
• P603 CoSHH PPE
• P600 Methods for Testing Performance of LEV
• P601 LEV Thorough Examination & Testing
• P602 LEV Basic Design Principles
• P604 LEV Commissioning & Performance Evaluation

Thought Leadership

One of the strengths of the HSA guidance is that it reinforces a simple truth recognised by occupational hygienists worldwide:

Silica-related diseases are entirely preventable—but only if exposure is controlled before damage occurs.

The health effects of respirable crystalline silica often develop slowly and without obvious early symptoms. By the time silicosis is diagnosed, the damage to the lungs is irreversible. This makes prevention through engineering control far more important than treatment after exposure.

From a LEVCentral perspective, this publication complements HSE guidance exceptionally well. Although written for Irish workplaces, its messages are universal: assess the risk, prevent dust becoming airborne wherever possible, capture any remaining dust using effective Local Exhaust Ventilation, maintain those controls, and ensure workers understand both the risks and the reasons behind the precautions.

These principles remain the foundation of effective silica dust management in every industry where respirable crystalline silica is generated.