9. With the exception of receptors R7 and R8, the existing LAeq day noise levels at the measurement locations are below the 65dB(A) minimum limit for construction noise assessed in accordance with BS5228. The threshold level for construction noise is therefore 65dB(A) during the day, except at R7 (threshold level of 66dB(A)) and R8 (threshold level of 68dB(A)). The night-time levels are below the BS5228 night time minimum limit of 45dB(A) with the exception of R10. Therefore 45dB(A) is used for the threshold level for HDD noise during the night for all receptors, with the exception of R10, where the threshold level is 59dB(A).
Converter Station Compound 10.
The Converter Station Compound is situated in a quiet, rural area and as such there are few dominant noise sources. During daytime hours, increased traffic levels on the nearby A14 and A1071 make a significant contribution to the ambient and background noise levels. Peak noise levels are generally as a result of individual vehicles passing close to a receptor location, farm vehicles in the fields or noise from animals such as dogs or geese. Whilst it was possible to see the active National Grid Bramford substation from the monitoring positions, including vehicle movements from ongoing construction works, no on-site activity was audible during the measurement times.
11. At night, the existing Bramford substation is a noise feature in the area, although it is less so during the daytime. Other noise sources include high altitude aircraft, wind in the trees and birds.
12.
Figure 26.2 shows the Indicative Converter Station Buildings, with the receptors and monitoring locations highlighted. The following is a description of the receptors and monitoring locations chosen.
Location MP1 – Bullenhall Farm, NGR TM102 466 13.
The daytime monitoring was undertaken on the grassed area immediately to the front of Bullenhall Farm house. The existing substation was not audible at the location, which is in a hollow with no line of sight to the substation. The area was quiet with the dominant noise being from wind in the nearby trees. There was a very distant hum audible from traffic noise. Other noise events that occurred during the monitoring period included: geese (64dB(A)); residents talking; phone ringing; vehicle movements; and high level aircraft (41-45dB(A))
14. Night-time monitoring was conducted on the access lane to the property at the entrance to the yard, approximately 70m from the façade of the property. This location was used at the request and advice of the resident due to the potential for
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Appendix 21.6 Baseline noise survey and supporting information Page 4
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46