no loose fixings causing rattling;  Using the most modern equipment available and ensuring such equipment is properly maintained and operated by trained staff;  Using silenced equipment where possible, in particular silenced power generators if night time power generation is required for site security or lighting;  Ensuring that vehicles and mobile plant are well maintained such that loose body fittings or exhausts do not rattle or vibrate;  Ensuring plant machinery is turned off when not in use;  Imposition of vehicle speed limits for heavy goods vehicle traffic travelling on access roads close to key receptors and ensuring that vehicles do not park or queue for long periods outside residential properties with engines running unnecessarily;  Ensuring, where practicable, that site access routes are in good condition with no pot- holes or other significant surface irregularities;  Maintaining good public relations with local residents. Example measures for how this could be undertaken are given in the East Anglia ONE CoCP (included in Volume 3, Appendix 5.1);  Provision of contact details for a site representative in the event that disturbance due to noise or vibration from the construction works occurs; and  ensuring that any complaints are dealt with promptly and that subsequent resolutions are communicated to the complainant.


If night time works are envisaged then a Section 61 Prior Consent Notice should be sought from SCC, SCDC and MSDC. This is a formal agreement that construction noise will be managed in accordance with ‘best practicable means’ (as outlined above).


130. BS 5228 states that where a barrier completely screens line-of-sight of a noise source, a reduction of around 10dB can be expected. Any barrier should be of a substantial construction, with no holes or gaps and be approximately 10kg/m2 in density.


131. Table 26.21 presents the residual impacts providing the measures outlined in Table 26.20 are fully implemented.


Table 26.21


Receptor ID


NSR1 NSR2 NSR3 NSR4 NSR5 NSR6 NSR7


Residual impacts from on-site construction works – assuming 10dBmitigation Property


Low Farm Dukes Hill


Cherry Tree Farm Glebe Farm The Common


Copenhagen Cottage Bullenhall Farm


Noise from cable installation dB LAeq 12hr 57 54 56 56 57 57 51


Residual Magnitude


Negligible Negligible Negligible Negligible Negligible Negligible Negligible


Impact Significance


Negligible Negligible Negligible Negligible Negligible Negligible Negligible


132. Table 26.21 demonstrates that residual negligible impacts are predicted at all receptors close to the cable route.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 26 Noise and Vibration Page 35


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