Introducing new or modified equipment in Ontario industrial establishments requires more than installation and testing. Before machinery is put into operation, regulatory requirements must be met to ensure hazards are properly controlled. This is where a PHSR plays a critical role.

Pre-start reviews are designed to identify hazards before equipment is energized or used in production. Rather than reacting to issues after installation, a PHSR evaluates risks during the final stages of project development.

A pre-start health and safety review ensures that equipment, processes, and protective systems meet the requirements of Ontario Regulation 851 before commissioning. Facilities that complete a PHSR in Ontario early in the project lifecycle are better positioned to avoid delays, reduce rework, and maintain compliance.

This approach supports prevention by ensuring that safety controls are in place before workers interact with equipment. It also helps organizations confirm that regulatory obligations have been addressed before operations begin.

What a PSR Assessment Evaluates

A pre-start health and safety review is a detailed engineering evaluation focused on identifying hazards tied to equipment and process design. The review assesses how systems function under normal and abnormal conditions and whether safeguards are adequate.

Key areas evaluated during a PHSR in Ontario include machine guarding, control systems, access points, and exposure to hazardous energy. The assessment also considers how equipment interacts with surrounding systems and whether layout conditions introduce additional risks.

This comprehensive evaluation ensures that hazards are not overlooked during installation or commissioning.

Key Aspects of PSR Assessments for Compliance

A PSR assessment plays a critical role in ensuring equipment and processes meet regulatory requirements before operation. Key aspects include:

  • Identifies Regulatory Gaps
    A licensed professional engineer reviews equipment to confirm compliance with applicable standards such as CSA Z432 and CSA Z460 before start-up.
  • Mandatory Scenarios
    PSRs are required when installing or modifying equipment related to flammable liquid storage, machine guarding, lifting and hoisting systems, racking structures, or hazardous processes.
  • Mitigates Legal and Safety Risk
    The assessment identifies deficiencies that could lead to Ministry of Labour work stoppages, penalties, or worker injuries, supporting proactive compliance.
  • Focuses on Change Management
    PSRs ensure that equipment modifications are safely integrated into existing systems and align with original design specifications.
  • Provides Documentation
    A sealed engineering report is produced and must be available for review by the Joint Health and Safety Committee, demonstrating due diligence.

Common Exemptions and Triggers

Understanding when a PSR is required—and when it may not be—is essential for compliance planning.

  • Exemptions
    Certain situations may qualify for exemption, such as limited storage volumes of flammable liquids below 235 litres in approved cabinets, specific racking configurations, or select portable extraction systems.
  • Triggers
    A PSR is triggered when new equipment is introduced or when an existing process is modified within an industrial establishment in Ontario.

Benefits of Early Action

Conducting a PSR early in the project lifecycle provides significant operational advantages.

  • Identifies potential compliance issues before installation
  • Allows design modifications to be implemented efficiently
  • Reduces downtime during commissioning
  • Minimizes the need for costly post-installation changes

Performing a preliminary assessment at the manufacturer’s stage, rather than after installation, supports smoother project execution and stronger compliance outcomes.

Common Risks Identified During Reviews

During a PHSR, several types of risks are commonly identified. These risks often stem from design or installation decisions that were not fully evaluated earlier in the project.

Frequent findings include inadequate machine guarding, insufficient separation between hazardous components and worker access points, and control systems that do not reliably prevent unsafe conditions. Layout issues may also be identified, particularly where equipment placement affects safe movement within the facility.

By identifying these risks early, a pre-start health and safety review helps prevent incidents and ensures that corrective actions can be implemented before start-up.

Engineering Controls and Required Modifications

When hazards are identified during a PHSR in Ontario, engineering controls are often required to address them. These controls may include redesigning guarding systems, modifying control logic, or adjusting equipment placement to improve safety.

Engineering modifications ensure that hazards are controlled at their source rather than managed solely through procedures. This approach aligns with Ontario’s regulatory focus on prevention through design.

Implementing these changes before equipment is put into operation reduces the need for costly retrofits and minimizes disruption to production schedules.

Ensuring Readiness for Inspection and Operation

A completed PHSR provides documented evidence that equipment has been evaluated and meets regulatory requirements. This documentation is essential for demonstrating compliance during inspections.

Facilities that conduct a pre-start health and safety review before commissioning are better prepared for regulatory oversight. They can show that hazards have been identified, assessed, and controlled in accordance with Ontario Regulation 851.

This level of preparation supports smoother start-up processes and reduces the likelihood of enforcement action.

Use PSRs to Avoid Delays and Compliance Gaps

PSR assessments are a key component of safe and compliant equipment commissioning in Ontario. By evaluating hazards before start-up, a PHSR helps organizations prevent incidents, reduce project delays, and maintain regulatory compliance.

Facilities that integrate pre-start health and safety review processes into project planning are better equipped to manage risk and support safe operations.

SAFE Engineering Inc. provides PHSR services that help industrial establishments complete compliant PHSR in Ontario assessments and ensure equipment is ready for safe operation. For more information, contact us today!