Write a risk assessment for Can you please generate a risk assessment for the operation of a Hino FM2632 Non-Destructive Digging/Vacuum truck

A safe operating procedure for a Hino FM2632 non-destructive digging and vacuum truck should be based on a documented risk assessment, site-specific job safety analysis, utility plans and permits, and the manufacturer’s operating instructions. Before work starts, the employer or supervisor should identify excavation hazards, soil conditions, underground and overhead services, traffic exposure, atmospheric hazards, and the specific risks from vacuum suction and high-pressure air or water. Operators should understand the job site, read and follow the operator’s manual, and use equipment that is appropriately sized and maintained for the task. [1] [3] [9]

Key hazards to identify

• Striking buried electrical, gas, water, sewer, or telecommunications services
• Contact with overhead power lines during truck positioning or boom/hose handling
• Excavation collapse, ground instability, tension cracks, water ingress, and undermining
• Workers or bystanders being struck by moving plant, reversing vehicles, hoses, tools, or flying debris
• Falls while climbing on and off the truck, slips on wet or muddy ground, and falls into open excavations
• Exposure to low oxygen, hazardous gases, vapours, dust, noise, and contaminated spoil
• Injury from high-pressure air or water injection, hose whip, uncontrolled release, or suction entrapment
• Manual handling injuries during hose handling, cover lifting, spoil management, and maintenance tasks

[1] [1] [1] [1] Control measures should follow the hierarchy of controls: eliminate or isolate hazards first, then use engineering controls, administrative controls, and PPE. Establish exclusion zones around the excavation, truck, boom, and hose operating area. Keep spoil, pipes, and materials at least 1 metre back from the excavation edge. Barricade or guard the excavation, provide safe access and egress, manage water accumulation, and stop work if cracks, seepage, undermining, or instability are observed. A competent person should inspect the excavation at the start of each shift and after any event that could affect stability, such as rain, vibration, or adjacent plant movement. [2] [2] [2] [2]

Underground utility location is a critical control. Before excavation, obtain current utility information, contact utility owners, and have services positively identified and marked. When approaching the estimated utility location, use safe and acceptable exposure methods such as careful hand digging or vacuum excavation/potholing to visually confirm the exact location and depth. Do not assume the utility runs straight or at constant depth between potholes. De-energize or isolate services where necessary, maintain emergency contact numbers, and use non-conductive tools where appropriate. [1] [1] [6] [6] [10]

For suction and high-pressure air or water hazards, never direct air or water at people, never use the lance or wand blindly near known or suspected utilities, and keep hands, feet, and body parts clear of the nozzle and suction end. Use the lowest effective pressure, maintain hose integrity, secure couplings, and control hose movement to prevent whip. Establish a no-go zone around the suction hose and excavation edge, and ensure communication between operator and spotter is clear before starting. Stop immediately if unexpected resistance, arcing, gas odour, damaged coating, or exposed utility is encountered. Treat all exposed services as live until confirmed otherwise. [3] [3] [6]

Operator competency and supervision

• Operators must be trained, authorised, and competent in the specific vacuum excavation truck, its controls, shutdown systems, and manufacturer limits
• Competency should cover excavation hazards, utility locating, potholing techniques, traffic management, emergency response, hose and pressure hazards, and daily inspections
• A competent person should supervise excavation safety and inspect the work area and excavation regularly
• Use a spotter where visibility is restricted, when working near overhead lines, utilities, pedestrians, or traffic
• Workers entering excavations or pits should also be trained in excavation hazards, access/egress, atmospheric hazards, and rescue arrangements

[2] [3] [3] [7] Pre-start inspection

• Confirm the risk assessment, permits, utility plans, dial-before-you-dig information, and site briefing are complete
• Inspect the truck, brakes, steering, lights, reversing alarm, tyres, mirrors, cameras, and warning devices
• Check PTO, vacuum system, water or air system, pressure gauges, relief devices, hoses, couplings, boom, nozzle, lance, tank, locks, and emergency stop functions
• Verify all guards, warning labels, ladders, access steps, and handholds are in good condition
• Ensure fire extinguisher, first aid kit, communication devices, spill kit, and rescue equipment are available
• Remove defective equipment from service and ensure scheduled maintenance and inspections are current

[3] [3] [3] [3] Excavation safety controls should include confirming soil conditions, selecting protective measures appropriate to depth and ground conditions, keeping people out of unsupported excavations where collapse is possible, and providing safe entry and exit. Ladders should be secured and located so workers do not have to travel excessive distance to escape. If the excavation could contain hazardous atmospheres, test the air before entry and monitor as needed. If the excavation meets the definition of a confined space, apply the confined space entry program, including isolation, atmospheric monitoring, communication, attendant arrangements, and rescue planning. [1] [2] [2] [2] [12]

Traffic management is required whenever the truck operates on or near roads, mobile plant routes, or public areas. Prepare a traffic management plan that addresses vehicle approach, parking, reversing, pedestrian separation, cones, barriers, signage, lighting, and spotters or traffic controllers where needed. Position the truck to minimise reversing and avoid setting up where workers are exposed between the truck and excavation. All personnel exposed to traffic should wear high-visibility clothing. [2] [2] [5]

PPE

• Hard hat
• Safety glasses, with face shield where splash or flying debris risk exists
• Gloves suitable for abrasion, cuts, wet work, and utility exposure
• Safety boots with protective toe and slip-resistant sole
• High-visibility clothing
• Hearing protection where noise levels are elevated
• Respiratory protection if dust, vapours, aerosols, or contaminated atmospheres cannot be otherwise controlled
• Protective clothing appropriate to mud, contaminated spoil, weather, and high-pressure water exposure

[3] [9] [4] Emergency procedures should cover utility strike, gas release, electric contact, trench collapse, engulfment, hose failure, pressure injection injury, fire, vehicle incident, medical emergency, and environmental spill. Stop work, isolate the area, shut down equipment if safe to do so, and contact emergency services and the relevant utility owner immediately. Do not attempt rescue from an unstable excavation without proper controls and trained rescue capability. Keep first aid equipment on site, maintain reliable communications, and ensure all workers know emergency contacts and escalation steps. Any suspected high-pressure injection injury requires urgent hospital treatment even if the wound appears minor. [1] [2] [2] [12]

Maintenance requirements should include planned preventive maintenance, daily operator checks, defect reporting, lockout or isolation before repair, and servicing only by qualified personnel. Hoses, couplings, pressure systems, vacuum components, tank closures, ladders, guards, and emergency devices should be inspected regularly and replaced when worn or damaged. Keep maintenance records, inspection checklists, and evidence that warning labels remain legible and safety-critical systems are functional. [3] [3] [4] [4]

For WHS/OHS compliance, the employer should ensure the work is planned, risk assessed, supervised, and carried out by competent persons; utilities are located by safe and acceptable means; excavations are inspected by a competent person; safe access, barriers, and traffic controls are provided; atmospheric hazards and confined space risks are managed; PPE is selected through hazard assessment; and training, inspections, maintenance, and emergency arrangements are documented. In an Australian WHS/OHS context, this procedure should be aligned with the applicable state or territory WHS/OHS Act and Regulations, excavation work requirements, plant regulations, high risk construction work obligations where applicable, utility owner rules, and relevant codes of practice for excavation work, managing risks of plant, confined spaces, hazardous manual tasks, PPE, and traffic management. [1] [2] [11] [8] [8]