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Assessing noise risks for larger / more dynamic sites

You need to be able to properly assess or estimate noise levels for larger / more dynamic sites so that you can put in place appropriate controls. The Noise Regulations define ‘exposure action values’ – levels of noise exposure which, if exceeded, require you to take specific action. There are ‘lower’ and ‘upper’ action values.

Where your employees are likely to be exposed at or above the upper exposure action value, you must take action to reduce noise exposure with a planned programme of noise control. Follow the control solutions listed accordingly. Some tasks with indicative noise levels at or above the upper exposure action value are given below. Actual levels can vary (possibly significantly) from this depending on what you are doing and where you are doing it. The specific equipment and how well it is maintained / used can have a particularly big impact.

Task Average Noise level (LEP,d)
Carpentry 92
Concrete
  • chipping / drilling
  • floor finishing
  • grinding
  • concrete worker

85+
85
85+
89
Driving a dumper or roller 85+
Formwork 92
Labouring:
  • concrete pour
  • digging / scabbling
  • shovelling hardcore
  • shuttering
  • angle grinding / cutting

97
100
94
91
90 – 110
M&E general installation 89
Piling:
  • operator
  • worker

85+
100+
Reinforcement work 86

The noise exposure calculator and ready reckoner can also help you work out your daily noise exposure, weekly noise exposures, and estimate the performance of hearing protection. Use manufacturers’ noise data but check it is relevant to the work you are doing. Detailed historic noise level data for a range of general site activities is contained within the BSI standard (BS 5228-1:2009 – Code of practice for noise and vibration control on construction and open sites). Further information on assessing noise exposures. Seek specialist help if you are unsure.

Updated 2014-09-11