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Example Risk Assessment for Excavations Title: Risk assessment for excavations to construct a strip foundation and sewer for a small site (2 houses)
What are the hazards?
Company name: Sure Foundations Ltd
Date assessment was carried out: 10/01/11
Date of next review: 10/01/12
Assessment carried out by: J. Surebrick
Who might be harmed and how?
What further action do you need to take?
What are you already doing?
Who needs to carry out the action?
When is the action needed by?
Done
Buried Services
Plant operators and any other workers in the vicinity.
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Use CAT to locate services and mark Hand-digging measures to be used to expose existing services.
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Banksman to observe area being excavated for any undiscovered services.
JS
14/02/11
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Overhead lines
Plant operators and any other workers in the vicinity.
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Liaise with line operator to see if line can be made dead or diverted.
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If lines remain live select plant or modify so that it can not reach the lines.
JS
From: 14/02/11
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•
Erect goalposts on all traffic routes under overhead power lines.
JS
From: 14/02/12
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•
Supervisor to monitor
JS
From: 14/02/11
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Worker falling into excavation
Serious injury or fatal injury could occur if a worker falls into an excavation.
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Physical barriers to be erected at excavation edge.
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What are the hazards?
Who might be harmed and how?
Plant falling into excavation e.g. concrete lorry overrunning edge of excavation
Serious injury or fatal injury could occur to those working within excavation and to the plant operator if plant topples into it.
Risks of sides of 1.5m deep strip foundation of excavation collapsing
Serious injury or fatal injury could occur if the excavation collapses in on worker.
Risks of sides of 12m long, 1.2m-2.0m deep excavation for sewers collapsing
What further action do you need to take?
What are you already doing?
Who needs to carry out the action?
When is the action needed by?
Done
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Vehicle routes are planned.
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Routes marked with baulks of timber and / or fencing.
JS
From: 14/02/11
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•
Provide secured stop blocks.
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Banksman to assist in safe use of plant.
JS
From: 14/02/11
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•
Foreman to check plant reports.
JS
From: 14/02/11
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Ground conditions suitable for sides of 1.5m deep excavation not to be supported.
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1.5m deep excavation to be carried out and foundations poured in on the same day.
JS
14/02/11
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•
No operatives to enter 1.5m deep excavation.
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Supervisor to monitor.
JS
14/02/11
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Serious injury or fatal injury could occur if the excavation collapses in on worker.
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Use a drag box to provide support to the sides of the excavations for the sewers.
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Operators must work within the confines of the drag box.
JS
14/02/11
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Serious injury or fatal injury could occur if the excavation collapses in on worker.
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Groundworks foreman to check safety of both excavations in accordance with CDM Regulations & record weekly inspections.
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Excavated material to be stockpiled remotely from the excavation (at least 2m away).
JS
From: 14/02/11
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Page 2 of 3
What are the hazards?
Who might be harmed and how?
What further action do you need to take?
What are you already doing?
Who needs to carry out the action?
When is the action needed by?
Done
Risk of sides of excavation collapsing due to ground / surface water
Serious injury or fatal injury could occur if the excavation collapses in on worker.
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Site investigation identified there should be no significant ground water.
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Ensure water pump is available on site. In period of heavy rain pump to be lifted in and out without entering excavation.
JS
14/02/11
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Ground contaminated connecting to existing foul manhole
Workers contract gastroenteritis or hepatitis A or Leptopirosis (Well’s disease).
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Provision of PPE, waterproof / abrasionresistant gloves, footwear, eye & respiratory protection.
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Inoculation to reduce risk of contracting hepatitis A. Workers to be advised off symptoms.
JS
15/01/11
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Provision of good site welfare facilities.
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Supervisor to monitor.
JS
15/01/11
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Use gas tester to check atmosphere in foul manhole before entering.
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If flammable / toxic gases are present, purge manhole & repeat atmosphere check.
JS
From: 14/02/11
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Inhalation of toxic gas and oxygen deficiency
Workers could be asphyxiated and / or poisoned.
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Assessment Review Date: 10/01/2012
Example Risk Assessment for Excavations Published by HSWNI, 10/11.
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