CO 4 lists the requirements for routine and periodic safety and occupational health-related inspections and assessments (e.g., documentation, tracking, and follow-up) to ensure a safe and healthful workplace.

CO 4 focuses on:

• Assessing and analyzing hazards and countermeasures
• Impact of changes to operations
• Self-inspections, surveys, and assessments
• Written hazard reporting procedures
• Monitoring, evaluating, and communicating hazards, risks, and controls
• External evaluations/audits