Navigating Hazardous Substance Prioritisation: A Step-by-Step Guide

One of the critical elements of workplace safety involves managing hazardous substances effectively. However, many organisations fall into the trap of treating COSHH assessments as mere procedural checklists, often relying too heavily on safety data sheets without a deeper analysis. It’s time to shift this paradigm and transform how we approach hazardous substance management. Here’s why prioritising these substances is crucial and how you can streamline your COSHH assessments for better safety and resource efficiency.

Understanding the Real Goal of a COSHH Assessment

A COSHH assessment isn’t just a copy-paste job from the safety data sheet. It’s a comprehensive evaluation of how a substance can cause harm, considering:

• The inherent hazards of the substance.
• The specific ways the substance is used in your operations.
• The environmental conditions in which the substance is used.

Once this detailed analysis is done, you can then focus on how to mitigate the risks, whether by changing how the substance is used, improving protective measures, or ideally, replacing it with a safer alternative.

Why Prioritise?

Most businesses already have a variety of hazardous substances in their storerooms, all marked with warning labels. Prioritising these substances allows you to manage your risk assessment process more effectively. Let’s break down how you can do this systematically.

Step 1: Refer to the Safety Data Sheet

Start with the manufacturer’s safety data sheet (SDS), specifically looking at section 2, which includes H-statements or hazard statements. These statements detail the hazards associated with the substance, providing a foundation for your risk assessment.

Step 2: Rate the Hazard Level

Assess the severity of these hazards. For instance, a substance causing mild skin irritation is less dangerous than one suspected of causing cancer. This initial rating helps in categorising the substances based on their inherent risk.

Step 3: Analyse Volatility and Dustiness

Assess how the substance is used and its likelihood of becoming airborne:

• Liquids: Evaluate the volatility, which involves looking at the substance’s boiling point relative to the ambient temperature where it’s used. For example, a liquid with a boiling point of 50°C used in an environment of 25°C poses a higher risk than a liquid with a boiling point of 300°C.
• Solids: Evaluate the dustiness. Solids in pellet form are low-risk, granular or crystalline solids are medium-risk, and fine powders or light dusts are high-risk due to their potential to become airborne.

Step 4: Gauge Usage Quantity and Frequency

Consider both the quantity and how often the substance is used:

• Quantity: Measure from small quantities (millilitres or grams) to large volumes (cubic meters or tons).
• Frequency: Determine whether the substance is used hourly, daily, weekly, or monthly.

Step 5: Prioritise Based on Combined Risk Factors

By combining the hazard level, dustiness or volatility, quantity, and usage frequency, you can create a priority rating. Using a simple spreadsheet (linked below), you can multiply these factors to arrive at a clear priority rating. This helps you identify which substances need immediate attention and which can be assessed later.

Spreadsheet Tool for Prioritisation

To make this process even more straightforward, we’ve developed a spreadsheet to help you rate your hazardous substances quickly and effectively. This tool will save you time and provide a clear overview of where you stand with your COSHH assessments.

Conclusion

Prioritising your hazardous substances not only improves workplace safety but also ensures that your resources are used efficiently. By understanding the real goal of a cost assessment and systematically evaluating substances based on their risks and usage patterns, you’ll be better equipped to manage hazards in your business.