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Reference: RA-2026-D6M6SNqI

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Geophysical Layout-NDRC-3.pdf

AP Aug 13, 2026 07:05 1084.1 KB
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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
Unloading and Manual Handling of Busbars and Sheet Metal
Sharp metal edges, heavy loads, awkward lifting postures
Musculoskeletal injuries, spinal strain, severe cuts, lacerations, foot impact injuries
Fabrication Technicians, Store Keepers, Material Handlers
Mandatory cut-resistant gloves (Level D/E), safety boots, manual handling training, use of overhead cranes and forklifts for heavy loads
P 4 × S 3
12
Enforce team lifting policy for loads exceeding 20 kg, conduct daily pre-use inspections on lifting gear and slings
P 2 × S 2
4
10
Hydraulic Shearing and Cutting of Metal Enclosures and Busbars
Exposed high-speed shear blades, moving mechanical parts, pinch points
Traumatic finger or limb amputation, severe crushing injuries, lacerations
Machine Operators, Fabrication Helpers
Two-hand safety control mechanisms, fixed perimeter guarding, emergency stop buttons, safety glasses, and cut-resistant gloves
P 4 × S 4
16
Install interlocked light curtains, implement strict Lockout/Tagout (LOTO) protocols during blade changes and maintenance
P 1 × S 3
3
11
Hydraulic Busbar Bending and Punching Operations
High-pressure hydraulic clamping, pinch points, metal ejection under force
Pinch injuries, hand/finger fractures, high-pressure fluid injection injuries
Machine Operators, Electrical Assemblers
Enclosed punching dies, foot pedal shrouds to prevent accidental actuation, routine hydraulic hose pressure inspection
P 3 × S 4
12
Mandatory usage of holding jigs to keep hands outside the hazard zone, schedule quarterly preventive hydraulic maintenance
P 1 × S 2
2
12
Welding (TIG/MIG) and Metal Frame Fabrication
Ultraviolet/Infrared arc radiation, toxic welding fumes, high-voltage electrical arc
Arc eye (photokeratitis), skin burns, respiratory illness, electrical shock
Welders, Fabricators, Nearby Personnel
Auto-darkening welding helmets, flame-retardant leather jackets and aprons, local exhaust ventilation (LEV), welding screens surrounding workspace
P 4 × S 3
12
Provide Powered Air-Purifying Respirators (PAPR) for prolonged welding operations, perform annual LEV extraction efficiency testing
P 2 × S 2
4
13
New Activity 125879654
Identify hazards here
Describe consequences
All personnel
List control measures
P 3 × S 3
9
Additional controls
P 2 × S 2
4