Site Safety Awareness, Hazard Identification and Risk Assessment
Site safety awareness begins with observation: knowing what normal looks like on your machine and your work area so that abnormal conditions stand out. Candidates should be able to distinguish a hazard (something with potential to cause harm) from a risk (the likelihood and severity of that harm), and to apply the risk assessment process: identify hazards, decide who might be harmed and how, evaluate risks, implement controls, record, and review. The hierarchy of control should be second nature: eliminate, substitute, engineering controls, administrative controls, then PPE as a last line of defence.
On an excavator site, typical hazards include pedestrians in the working area, ground instability and voids, overhead power lines, buried services, other plant, falling loads, noise, dust, and the machine's own movement envelope. Dynamic risk assessment is the live version of this: conditions change through the day as trenches deepen, deliveries arrive, or weather worsens. Toolbox talks, permits to dig, and exclusion zones are administrative controls that only work if followed.
Traps in questions: offering PPE as the first control when elimination or engineering is better; treating a near miss as unimportant (it is a free lesson and should be reported); assuming a risk assessment done at the start of the job still covers the job after conditions change; and confusing hazard with risk. Another trap is the suggestion that a banksman removes the need for physical segregation.
Rule of thumb: no one enters the slewing radius without the operator's knowledge and agreement, and the operator stops work if a person enters unannounced. Worked example: a trench edge has cracked and slumped. The hazard is collapse; the risk to a worker in the trench is high severity. Control: stop work, withdraw people, barricade and reassess before any further entry.