Edit Risk Assessment

Reference: RA-2026-CbskRMVA

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Risk Assessment Matrix

SN Activity Hazard Consequence Groups Exposed Controls Initial Risk Additional Controls Residual Risk Actions
1
Complete HDPE Duct Infill
1. Vehicle movement and traffic hazards 2. Manual handling during loading/unloading 3. Uneven ground conditions
Personal injury, property damage
Site Personnel, Subcontractors, Public
1. Implement traffic management plan 2. Designated walkways 3. Mandatory PPE 4. Speed limit enforcement
P 3 × S 3
9
1. Comply with ADOSH SF CoP 27.0 2. Daily vehicle inspection 3. Toolbox talk
P 2 × S 2
4
2
Site mobilization and setup of temporary
Passing high-speed public traffic and moving site vehicles
Personal injury, property damage
Site Personnel, Subcontractors, Public
Approved TTM plan, high-visibility clothing (Class 3), physical water-filled/concrete barriers, advanced warning signs, and trained flagmen.
P 3 × S 3
9
Deployment of Truck Mounted Attenuators (TMA) and enforcement of reduced speed limit zone in coordination with local traffic authorities.
P 2 × S 2
4
3
Trench excavation and sub-surface ground preparation
Accidental strike on existing buried live electrical cables or gas utilities
Personal injury, property damage
Site Personnel, Subcontractors, Public
Utility mapping review, CAT & Genny cable avoidance scanning, and manual trial pits (pot-holing) prior to mechanical excavation.
P 3 × S 3
9
Mandatory Permit to Dig system, use of insulated hand tools near identified utilities, and continuous competent supervision.
P 2 × S 2
4
4
Uncoiling, handling, and positioning HDPE pipe
Sudden release of stored mechanical spring energy in coiled HDPE pipe
Personal injury, property damage
Site Personnel, Subcontractors, Public
Use of specialized pipe reeler/uncoiler frame, controlled strap cutting procedures, and establishing exclusion zones.
P 3 × S 3
9
Mandatory deployment of safety restraints/bands before unstrapping and wearing high-impact resistant safety glasses and gloves.
P 2 × S 2
4
5
HDPE pipe jointing via electrofusion and
High-temperature heating elements, hot molten plastic, and portable electrical generators
Personal injury, property damage
Site Personnel, Subcontractors, Public
Certified welding equipment, RCD-protected generators, heat-resistant safety gloves, and portable fire extinguishers nearby.
P 3 × S 3
9
Hot Work Permit implementation, provision of localized exhaust ventilation or respiratory protection (FFP3) in confined areas.
P 2 × S 2
4
6
Entry into underground chambers and manholes
Hazardous atmosphere (oxygen deficiency, toxic gases like H2S/methane), engulfment, or fall from height
Personal injury, property damage
Site Personnel, Subcontractors, Public
Confined Space Entry Permit, pre-entry 4-gas atmospheric testing, forced air ventilation, and tripod rescue system with harness.
P 3 × S 3
9
Continuous multi-gas monitoring during entry, dedicated trained top-person/standby monitor, and verified emergency rescue plan.
P 2 × S 2
4
7
Mechanical winch pulling of HDPE sub-ducts
High-tension winch wire snap, rotating capstans, and pinch/nip points
Personal injury, property damage
Site Personnel, Subcontractors, Public
Properly rated winching wire with calibrated weak-link swivel, emergency stop switches, and safety guards over rotating parts.
P 3 × S 3
9
Integrated load monitoring with automatic shut-off at peak tension limits and strict exclusion zones along the tension line.
P 2 × S 2
4
8
Duct proving (mandrel testing) and air
Uncontrolled high-pressure compressed air release and projectile ejection of foam pig or mandrel
Personal injury, property damage
Site Personnel, Subcontractors, Public
Calibrated pressure relief valves, secure containment/catcher cage at receiving duct end, clear exclusion zone enforcement.
P 3 × S 3
9
Mandatory Pressure Testing Permit, full-face protection shields for operators, and calibrated double-gauge manifolds.
P 2 × S 2
4
9
Pre-excavation scanning and utility route survey
Unidentified underground live high/medium voltage electrical cables and utilities
Electric shock, electrocution, severe arc flash burns, structural power disruption
Surveyors, Cable Avoidance Tool (CAT) operators, site supervisors
Obtain current utility drawings; perform mandatory Cable Avoidance Tool (CAT) and Signal Generator (Genny) scanning; mark identified cable lines with ground spray paint; issue Dig Permit prior to work.
P 4 × S 5
20
Enforce hand-digging trial holes along marked routes; implement daily supervisor sign-off on Permit to Dig; mandate zero mechanical digging within 500mm of identified live services.
P 1 × S 5
5
10
Loading, transport, and offloading of concrete route markers and posts
Heavy manual lifting, unstable loads, awkward postures, and sharp edges
Musculoskeletal disorders (MSDs), spinal injuries, crushed hands or feet, lacerations
Lorry drivers, logistics crew, groundworkers
Utilize mechanical lifting aids (vehicle cranes/tail lifts) where feasible; conduct team lifts for items over 20kg; wear cut-resistant gloves and steel toe safety boots.
P 4 × S 3
12
Provide pre-task manual handling refresher training; restrict maximum single-person manual lift to 25kg; inspect all lifting gear and slings prior to use.
P 2 × S 2
4
11
Vehicle positioning and working near live public roadways / highways
Passing third-party vehicular traffic, low-visibility conditions, reversing vehicles
Severe collision, personnel impact causing critical injuries or fatality
Field technicians, traffic marshals, public road users
Implement Temporary Traffic Management (TTM) in accordance with Chapter 8 / local roadwork standards; wear High-Vis clothing (Class 3); operate amber warning beacons on all work vehicles.
P 3 × S 5
15
Deploy trained vehicle banksmen for all reversing maneuvers; set up physical cone barriers and warning signage at appropriate safe stopping distances.
P 1 × S 4
4
12
Hand digging foundation holes for marker post installation
Striking hidden underground electrical cables with sharp hand tools, buried sharp objects
Electrical arc flash, severe electric shock, puncture wounds, localized hand injuries
Excavation operatives, groundworkers
Use fully insulated non-conductive hand excavation tools (rated to 1000V, BS EN 60900); excavate carefully using soft-dig techniques (e.g., digging side-to-side, not pitching down); wear dielectric boots.
P 3 × S 5
15
Continuous scanning with CAT tool as excavation progresses vertically; halt work immediately and report if unidentified tiles, warning tape, or concrete slabs are struck.
P 1 × S 4
4