Write a risk assessment for Site hazard identification

A sound workplace risk assessment and site hazard identification procedure should be systematic, task-based, and documented. In practice, it should identify hazards, evaluate the likelihood and severity of harm, prioritize risks, implement controls using the hierarchy of controls, verify effectiveness, and communicate results to workers and supervisors. The process should cover routine and non-routine work, changing site conditions, affected persons, and legal requirements. [1] [7]

1. Plan the assessment: appoint a competent assessor or team, involve supervisors, workers, and the health and safety committee or representative, and define the job, area, process, or activity to be assessed.
2. Break the work into steps: divide the job or process into tasks so hazards can be identified at each stage, including startup, normal operation, maintenance, cleaning, shutdown, and emergencies.
3. Identify hazards: inspect the site, review the physical environment, equipment, materials, products, work organization, and interactions with other activities. Include routine and non-routine tasks, all shifts, off-site work, contractors, visitors, and the public where relevant.
4. Use multiple information sources: observations, inspections, job safety analysis, incident and near-miss records, worker reports, SDSs, manufacturer instructions, exposure monitoring, and prior experience.
5. Consider hazard categories: biological, chemical, ergonomic, physical, psychosocial, and safety hazards.
6. Assess risk for each hazard: determine who may be harmed, how exposure occurs, how often and how long exposure may occur, the number of people exposed, and the potential consequence if controls fail.
7. Rank and prioritize risks: use a qualitative or semi-quantitative matrix based on probability and severity so the highest-risk hazards are addressed first.
8. Select controls using the hierarchy of controls: elimination, substitution, engineering controls, administrative controls/work practices, and PPE as the last line of defense.
9. Implement mitigation actions, assign responsibilities and deadlines, and stop work immediately where risk is intolerable until controls are in place.
10. Verify and review: monitor control effectiveness, repeat field-level assessments as conditions change, investigate incidents and near misses, and update the assessment when equipment, materials, staffing, or processes change.
11. Document and communicate: record hazards, consequences, risk level, priority, controls, and approvals; ensure workers understand hazards, controls, and safe work procedures before starting work.

[7] [6] [9] For site hazard identification, the assessment should look beyond obvious hazards and capture both existing and potential conditions. Review the work area before each shift and while work is underway, especially when conditions change. Include abnormal conditions such as sudden emissions, power outages, shutdowns, extreme weather, removed guards, and emergency situations. A field-level risk assessment is especially useful for dynamic worksites because it allows the team to identify hazards in real time, confirm whether current controls are adequate, and add further controls before work begins. [2] [7] [9]

Typical hazards to identify include:

• Biological hazards such as bacteria, viruses, fungi, insects, plants, and animals
• Chemical hazards from liquids, gases, solids, mists, vapours, and other hazardous substances
• Ergonomic hazards such as repetitive motion, awkward postures, forceful exertion, and poor workstation setup
• Physical hazards such as noise, vibration, radiation, temperature extremes, pressure extremes, and electricity
• Psychosocial hazards such as stress, violence, harassment, fatigue, and isolation
• Safety hazards such as slips, trips, falls, moving equipment, falling objects, sharp edges, machine guarding deficiencies, and equipment malfunction

[5] Risk evaluation should be based on both probability and severity. A practical method is to assign each hazard a likelihood rating and a consequence rating, then use a risk matrix to determine priority. Higher-risk tasks require immediate action, while medium-risk tasks require prompt controls and low-risk tasks still need confirmation that no regulatory requirement has been overlooked. Risk evaluation should also consider exposure route, frequency and duration of exposure, number of people affected, worker competence, location, tools and machinery used, and possible interaction with nearby work. [4] [3] [10]

Recommended control measures and mitigation actions:

• Eliminate the hazard where possible, such as removing the hazardous task, substance, or exposure entirely.
• Substitute with a safer material, process, tool, or method.
• Apply engineering controls such as machine guarding, local exhaust ventilation, isolation, barriers, interlocks, automation, noise control, or ergonomic redesign.
• Apply administrative controls and safe work practices such as permits, SOPs, training, supervision, restricted access, signage, housekeeping, preventive maintenance, exposure time limits, traffic management, lockout/tagout, and emergency preparedness.
• Use hygiene practices and facilities where relevant, including handwashing, decontamination, change areas, and proper storage.
• Provide PPE only after higher-level controls have been considered, and ensure it is hazard-specific, durable, properly fitted, maintained, and workers are trained in its use and limitations.
• Assign corrective actions with owners and due dates, and verify completion before work proceeds where residual risk remains unacceptable.

[9] [3] [11] Safe work practices should be built directly into the procedure. At minimum, require pre-job planning, review of the risk assessment before work starts, verification that workers are trained and authorized, inspection of tools and equipment, confirmation that guards and safety devices are in place, housekeeping of the work area, control of simultaneous operations, and stop-work authority when conditions change. Workers new to the task should review procedures, labels, SDSs, warnings, and the relevant risk assessment before starting. [8] [7]

Incident prevention depends on using the assessment proactively and learning from events. Review injury records, incident investigations, near misses, and worker hazard reports to identify trends and weak controls. Reassess after incidents, after changes to equipment or processes, and during regular inspections. This approach helps prevent recurrence, reduces complacency, and supports continuous improvement. [3] [2] [15]

PPE requirements should be determined through a documented PPE hazard assessment tied to the job and task. The assessment should identify the hazard type and source, body parts at risk, severity, probability, risk code, and control method. Common PPE categories include eye/face, head, hearing, hand, foot, leg, body, respiratory, fall protection, and personal flotation devices where applicable. PPE selection must match the hazard and should not replace feasible engineering or administrative controls. [14] [13] [11]

For compliance with occupational health and safety requirements, the procedure should be documented, communicated, and reviewed. It should identify applicable legal requirements for the jurisdiction, involve required workplace parties, maintain records of assessments and certifications where required, and ensure workers are informed of hazards and protective measures. If work is performed at multiple sites, assess each site because hazards and controls may differ. Documentation should record the process used, the hazards identified, who may be affected, risk level, priority, controls selected, and how decisions were made. [4] [7] [12] [15]

A practical site procedure can therefore require the following minimum records for each assessment: location, date, assessor(s), job/task, task steps, identified hazards, persons at risk, existing controls, likelihood, severity, risk rating, priority, additional controls, responsible person, completion date, verification of effectiveness, worker communication, and review date. This creates a defensible and usable system for hazard identification, risk reduction, PPE selection, and regulatory compliance. [12] [9] [15]