Understanding the Hierarchy of Control

Understanding the Hierarchy of Control

The Hierarchy of Control is a fundamental framework in Work Health and Safety (WHS) and occupational hygiene, designed to systematically manage workplace risks. It provides a structured approach to eliminating or minimising hazards, ensuring worker safety and compliance with SafeWork NSW regulations and the Work Health and Safety Act 2011 (NSW).

The Five Levels of Control Measures

The hierarchy consists of five levels, ranked from the most effective (elimination) to the least effective (PPE):

1. Elimination (Most Effective)

·       Completely removing the hazard from the workplace.

·       Example: Substituting a hazardous chemical with a non-toxic alternative or redesigning work processes to eliminate exposure.

2. Substitution

·       Replacing the hazardous material or process with a safer alternative.

·       Example: Using water-based paints instead of solvent-based paints to reduce exposure to toxic fumes.

3. Engineering Controls

·       Implementing physical changes to the workplace to isolate or reduce exposure to hazards.

·       Example: Installing local exhaust ventilation systems to control airborne contaminants in confined spaces.

4. Administrative Controls

·       Implementing policies, procedures, and training to minimise risk.

·       Example: Implementing job rotation to limit individual exposure to hazardous substances.

5. Personal Protective Equipment (PPE) (Least Effective)

·       Providing protective gear such as gloves, respirators, and eyewear.

·       Example: Ensuring workers handling asbestos wear P2 respirators and disposable coveralls.

Legal Requirements in NSW

Under the Work Health and Safety Regulation 2017 (NSW), businesses must apply the hierarchy of control when managing risks, particularly for hazardous substances, noise exposure, and airborne contaminants. SafeWork NSW enforces compliance through audits, guidance materials, and penalties for non-compliance.

Duty of PCBUs (Persons Conducting a Business or Undertaking)

·       Identify hazards and assess risks.

·       Apply the highest level of control reasonably practicable.

·       Regularly review and maintain control measures to ensure effectiveness.

Why the Hierarchy of Control is Crucial in Occupational Hygiene

In occupational hygiene, effective hazard control protects workers from long-term health risks, such as respiratory diseases, chemical exposures, and ergonomic injuries. Applying the hierarchy of control ensures workplaces meet SafeWork NSW standards and create safer environments for employees.

Ensuring Compliance and Best Practices

·       Conduct risk assessments regularly.

·       Implement training and awareness programs for employees.

·       Maintain compliance with WHS legislation and industry best practices.

·       Engage certified occupational hygienists to assess and mitigate workplace hazards.

By adhering to the Hierarchy of Control, businesses can significantly reduce workplace risks, ensuring legal compliance and protecting worker health in alignment with SafeWork NSW guidelines.

For expert guidance on WHS compliance and occupational hygiene assessments, contact Confluence Environmental today.