Excavation
CompletedReference: RA-2026-aIbxLKkI
Total Activities
8
High Risk
0
Medium Risk
8
Low Risk
0
📄 Method Statement
No method statement was uploaded for this assessment.
Risk Assessment Matrix
| SN | Activity | Hazard | Consequence | Groups Exposed | Controls | Initial Risk | Additional Controls | Residual Risk |
|---|---|---|---|---|---|---|---|---|
| 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
|
Activity Log
System
•
created
1 week ago