Water Proofing
CompletedReference: RA-2026-RjCfc5vF
Total Activities
12
High Risk
2
Medium Risk
10
Low Risk
0
📄 Method Statement
WATER PROOFING.docx
356.1 KB
docx
📎 Associated Documents
Documents uploaded for different statuses
Status Timeline
Current:
Completed
History:
AEN - Approved except as Noted
(Aug 16)
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
|
| 9 | Pre-work site inspection and electrical isolation (LOTO) in areas requiring waterproofing | Presence of energized electrical panels, switchgear, or exposed cables in damp environments | Electrocution, electric shock, arc flash, fatal injury, secondary trauma from falls | Waterproofing technicians, electrical technicians, site supervisors | Verify Lockout/Tagout (LOTO) and de-energization with a multi-meter; issue Permit to Work (PTW); install physical insulated barriers and IP-rated temporary covers over adjacent live components; use intrinsically safe portable lighting (24V/battery-operated). |
P
4
×
S
5
=
20
|
Continuous supervision by a qualified electrical safety observer; mandatory daily safety briefing on dead-work boundaries. |
P
1
×
S
4
=
4
|
| 10 | Mechanical surface preparation (grinding/wire brushing) near electrical penetrations and switchgear | Conductive dust ingress into electrical assemblies, flying debris, hand-arm vibration, high noise | Short circuit, equipment failure, eye injury, lacerations, noise-induced hearing loss | Applicators, nearby electrical operators | Use HEPA-filtered vacuum-attached shrouded grinders; seal all electrical panels and bus ducts with heavy-duty polyethylene sheeting and fire-retardant duct tape; mandate safety goggles, cut-level 5 gloves, and hearing protection. |
P
4
×
S
3
=
12
|
Implement rotation schedule to limit vibration exposure; conduct thermal imaging / dust checks before unsealing electrical equipment. |
P
2
×
S
2
=
4
|
| 11 | Torch-applied bituminous waterproofing membrane on substation roof/plinth | Open flame from LPG torches near combustible electrical insulation, cables, and cable trays | Major fire outbreak, explosion of nearby gas/transformer oil, structural damage, burn injuries | Waterproofing crew, substation operators, site personnel | Obtain Hot Work Permit; ensure 2x 9kg DCP and 1x CO2 fire extinguishers on hand; maintain minimum 1.5m clearance from cable penetrations; deploy fire-resistant ceramic blankets over exposed cable trays. |
P
4
×
S
5
=
20
|
Designate a dedicated trained fire watch during work and for a minimum 60-minute post-work cool-down period; enforce combustible gas monitoring. |
P
1
×
S
4
=
4
|
| 12 | High-pressure chemical injection polyurethane grouting to seal leaking cable ducts and conduits | High injection pressure (up to 200 bar), hose burst, chemical splash of isocyanate/polyurethane resins | High-pressure injection injury, severe chemical eye damage, skin sensitization, acute respiratory irritation | Grouting operators, helpers | Inspect pump, hoses, and mechanical packers prior to pressurization; equip pump with calibrated pressure relief valves; mandate full-face shield, chemical safety goggles, chemical-resistant nitrile gauntlets, and chemical coveralls. |
P
3
×
S
4
=
12
|
Install whip-checks on all high-pressure hose couplings; keep emergency eyewash station within 10 meters of application zone. |
P
1
×
S
3
=
3
|
Activity Log
System
•
uploaded document for status: AEN
4 weeks ago
System
•
uploaded document for status: AEN
4 weeks ago
System
•
created
1 month ago