environmental statement - Rotherham's Online Application for ...

Morthen (H1)
Brampton-en-le-morthen
(H2)
Thurcroft (H3)
Ulley (H4)
9.29 Tables 9.3 and 9.4 detail the prevailing background noise, relevant criteria
and predicted wind turbine noise levels for amenity hours and night-time
operation. The tables also show the exceedance level which is the level of
turbine noise relative to the noise criteria. A negative exceedance level
indicates satisfaction of the noise criteria. Due to the lack of noise data
during the night time at wind speeds >10.6ms-1, the background noise
levels and hence noise exceedance levels could not be calculated and are
left blank in Table 9.4. It is reasonable to assume that background noise
levels will not decrease at windspeeds >10.6ms-1, therefore if turbine
noise meets the noise limits at 10.6ms-1 (which it does at all receptors)
there is a low likelihood of exceedance at windspeeds between 10.6 and
12ms-1.
Table 9.3 Exceedances of the ETSU-R-97 Derived Quiet Daytime Criterion
Curves by the Predicted LA90 Wind Farm Noise Immission Levels at each of the
Noise Assessment Locations
Location
216
Wind Speed
3 4 5 6 7 8 9 10 11 12
Prevailing Background Noise Level: Amenity Hours 46.5 47.8 49.1 50.4 51.7 53.0 54.3 55.6 56.9 58.2
Lower Noise Criterion : ETSU-R-97 51.5 52.8 54.1 55.4 56.7 58.0 59.3 60.6 61.9 63.2
Upper Noise Criterion : ETSU-R-97 51.5 52.8 54.1 55.4 56.7 58.0 59.3 60.6 61.9 63.2
Predicted Wind Turbine Noise LA90 - - 36.1 39.9 40.7 40.8 40.8 40.8 40.8 40.8
Exceedance Level LA90 - - -18.0 -15.5 -16.0 -17.2 -18.5 -19.8 -21.1 -22.4
Prevailing Background Noise Level: Amenity Hours 43.3 45.1 46.7 48.2 49.6 50.9 52.1 53.2 54.1 55.0
Lower Noise Criterion : ETSU-R-97 48.3 50.1 51.7 53.2 54.6 55.9 57.1 58.2 59.1 60.0
Upper Noise Criterion : ETSU-R-97 48.3 50.1 51.7 53.2 54.6 55.9 57.1 58.2 59.1 60.0
Predicted Wind Turbine Noise LA90 - - 38.0 41.8 42.6 42.7 42.7 42.7 42.7 42.7
Exceedance Level LA90 - - -13.6 -11.4 -12.0 -13.2 -14.3 -15.4 -16.4 -17.2
Prevailing Background Noise Level: Amenity Hours 42.8 44.2 45.7 47.3 49.0 50.6 52.1 53.4 54.5 55.3
Lower Noise Criterion : ETSU-R-97 47.8 49.2 50.7 52.3 54.0 55.6 57.1 58.4 59.5 60.3
Upper Noise Criterion : ETSU-R-97 47.8 49.2 50.7 52.3 54.0 55.6 57.1 58.4 59.5 60.3
Predicted Wind Turbine Noise LA90 - - 33.1 36.9 37.7 37.8 37.8 37.8 37.8 37.8
Exceedance Level LA90 - - -17.6 -15.4 -16.3 -17.8 -19.3 -20.6 -21.7 -22.5
Prevailing Background Noise Level: Amenity Hours 42.2 43.3 44.3 45.3 46.3 47.2 48.2 49.1 50.1 51.2
Lower Noise Criterion : ETSU-R-97 47.2 48.3 49.3 50.3 51.3 52.2 53.2 54.1 55.1 56.2
Upper Noise Criterion : ETSU-R-97 47.2 48.3 49.3 50.3 51.3 52.2 53.2 54.1 55.1 56.2
Predicted Wind Turbine Noise LA90 - - 40.7 44.5 45.3 45.4 45.4 45.4 45.4 45.4
Exceedance Level LA90 - - -8.6 -5.8 -6.0 -6.8 -7.8 -8.7 -9.7 -10.8
Penny Hill Wind Farm
Environmental Statement