133. It is not deemed that other site or off-site mitigation is required for receptors expected to experience minor impacts, due to the small exceedance of the construction noise ‘limit’ and the relatively short duration of the impact.
134. CCSs will be established close to the landfall, along the cable route and for the converter stations. The CCSs will generally be used for storage of materials, equipment and plant. The selected CCS locations are not in the immediate vicinity of residential properties. As such, it is considered that they will not result in any significant construction noise affecting receptors and will therefore have a negligible effect.
Scenario 2: Open Trenching and Laying Ducts
135. Under Scenario 2 a programme of installing four cables and up to four ducts along the cable corridor will be undertaken. In order to facilitate the construction work a temporary haul road will be built along much of the onshore cable route and then removed once works have been completed. In eight locations HDD will be used to install a series of ducts under obstacles, water courses or sensitive areas. A more detailed description of the proposed works is provided in Chapter 5 Description of the Development of this PEIR and the onshore cable route shown in Figure 26.1.
136. A construction noise screening exercise was undertaken using a 65dB LAeq, 12hr impact buffer. An overview of the 65dB LAeq, 12hr construction noise buffer is shown in Figure 26.3.
137. The predicted noise level at each of the selected receptors is presented in Table 26.20.
Table 26.22
Receptor ID
NSR1
NSR2 NSR3
NSR4
NSR5 NSR6
NSR7 Construction noise levels calculated at specific identified receptors Property
Noise from cable installation dB LAeq 12hr
Low Farm 73 Dukes Hill
Cherry Tree Farm
Glebe Farm
The Common
Copenhage n Cottage
Bullenhall Farm
Preliminary Environmental Information May 2014
69 72
71
73 74
65
Noise from major HDD dB LAeq 12hr ----
62 ---- ---- 66 ---- 58
Total Noise dB LAeq,12h 73
70 72
71
74 74
66 East Anglia THREE Offshore Windfarm
Impact magnitude
Medium
Medium Medium
Medium
Medium Medium
Low
Impact Significance
Moderate adverse
Moderate adverse
Moderate adverse
Moderate adverse
Moderate adverse
Moderate adverse
Minor adverse
Chapter 26 Noise and Vibration Page 36
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