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Risk Assessment Activity: Site: Supervisor Date

Digging 1.8m foundations and trench filling with gen 3 concrete School Building Alex Dibble 14/02/2014

Hazard Identification and Risk Evaluation Hazards

Who is affected?

Falling into the trench Tripping over work tools left out Vibration damaging walls Existing Services in the trench being dug through Ground Collapsing into trench Plant driving around the site and running over a worker Someone falling into wet concrete Hazardous substances in the soil when being dug out harming workers

Workers Workers, pedestrians

Risk Evaluation 4x2=8 4x2=8

Nearby buildings and their occupants

3 x 4 = 12

2x4=8

Workers, nearby buildings and their occupants Workers

4 x 3 = 12

2x3=6

3x3=9

1x3=3

Workers, Pedestrians

3 x 5 = 15

2 x 5 = 10

Workers

3 x 4 = 12

2x4=8

Workers, nearby buildings and their occupants

2 x 5 = 10

1x5=5

Residual Risk 2x2=4 3x2=6

Control Measures The hazards (problems) above relate to the control measures (solutions) below. Implementing these measures will reduce the risk. 1

Fencing erected around the trenches and signs put on the fence to make it more obvious and visible.

2

Implement site rules and certain places for workers to leave tools.

3

Use as much low impact machinery as possible, reinforce buildings and check after first few uses to check if any surrounding buildings are damaged.

4

Get a thorough site survey and all previous plans for the area. Dig slowly just in case there is some unaccounted pipe work in the soil


Risk Evaluation=

Likelihood

Likelihood x Severity 1

Very Unlikely

2

Unlikely

3

Possible

4

Likely

5

Very Likely

A freak combination of factors would be required for an accident/incident to occur

A rare combination of factors would be required for and accident/incident to occur

Could happen when accidental factors are present

Not certain to happen but an additional factor may result in and accident/incident

Almost inevitable that an accident/incident would result

Severity How serious would the consequences be? Consider the type of hazard: physical, biological, chemical, ergonomic

1

2

3

4

5

Negligible

Slight

Moderate

High

Very High

Negligible injury, no absence from work

Minor injury requiring first aid treatment

Injury leading to lost time

Involving a single person, serious injury or death

Involving multiple persons, serious injury or death

Low 1

Low 2

Low 3

Low 4

Low 5

Low 2

Low 4

Low 6

Low 3

Low 6

High 9

High 12

High 15

Low 4

Medium 8

High 12

High 16

High 20

Low 5

Medium 10

High 15

High 20

High 25

Medium Medium 8 10


How often does the hazard occur? Consider the task, frequency, duration, method of work and employees involved

Risk

Score

Comment

LOW

1-6

Usually an acceptable level provided that the control measures are adhered to

MEDIUM

8-10

HIGH

12-25

Further controls may be needed .e.g. better equipment, strict supervision of task, additional training Task must not proceed. Reassess the risks for all hazards and introduce better control measures.


Risk assessment