3. Summary

A baseline noise survey was undertaken to characterise the existing noise climate within the onshore development area of Berwick Bank Onshore Substation (OnSS). Surveys were undertaken between 7th and 20th May 2021 and between 25th June and 5th July 2021.

The data collected during the baseline noise survey was analysed in order to determine a representative background (LA90) noise level during the daytime and night-time at the identified noise sensitive receptors. Table 14 and Table 15 below shows the representative LA90 determined for each location.

Table 14 – Baseline Noise Data Summary, Daytime

Receptor Identifier

Average, dBLA90,15min

Mode, dBLA90,15min

Standard Deviation

Determined Representative LA90

SSR1

34

31

4.8

31

SSR2

46

48

6.3

45

SSR3

33

32

3.6

31

SSR4

46

44

2.5

44

SSR5

36

35

4.2

34

SSR6

35

33

4.2

33

 

Table 15 – Baseline Noise Data Summary, Night-time

Period

Average, dBLA90,15min

Mode, dBLA90,15min

Standard Deviation

 

SSR1

32

32

5.0

30

SSR2

35

31

5.6

30

SSR3

29

31

3.4

28

SSR4

45

44

2.4

44

SSR5

31

31

4.8

28

SSR6

34

35

4.0

33