equipment and activities on site. Pre-determined locations junction pit will be constructed and the cable pulled through fromthe preceding junction pit. Joints in the cable will be made at the jointing pits to enable easy access and servicing.
124. The need to build construction access road is minimised through making optimal use of existing farm access tracks. In this way bulkmaterial movement is minimised. Light construction plant can be used to construct junction pits and to pull the cable through.
125. A construction noise screening exercise was undertaken using a 65dB(A) impact buffer. An overview of the 65dB(A) construction noise buffer is shown in Figure 26.3.
126. The predicted noise level at each of the selected receptors is presented in Table 26.19.
Table 26.19
Recepto r ID
NSR1 NSR2 NSR3 NSR4 NSR5 NSR6
NSR7 Property
Construction noise levels calculated at specific identified receptors Impact magnitude
Low Farm Dukes Hill
Noise from cable installation dB LAeq 11hr 67 64
Cherry Tree Farm 66 Glebe Farm The Common
Copenhagen Cottage
Bullenhall Farm
66 67 67
61 Low
Negligible Low Low Low Low
Negligible Impact Significance
Minor adverse Negligible
Minor adverse Minor adverse Minor adverse Minor adverse
Negligible 127. Table 26.19 shows that certain receptors may experience a minormagnitude effects.
128. It is not considered that other site or off-site mitigation is required for receptors expected to experience low impacts, due to the small exceedance of the construction noise ‘limit’ and the relatively short duration of the impact.
129. A range of industry standard and recommended mitigation measures are available to reduce impacts. These are presented in Table 26.20 below.
Table 26.20 Potential mitigation measures in relation to construction noise Mitigation measures
A set of generic Best Practice working practices referred to as Best Practicable Means (BPM) would be included in the noise and vibration management scheme, and Construction Code of Practice (CoCP) for East Anglia THREE. Examples include: Locating static noisy plant in use as far away from noise sensitive receptors as is feasible for the particular activity; Ensuring that plant and equipment covers and hatches are properly secured and there are
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 26 Noise and Vibration Page 34
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