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

Receptor Easting (m) Northing (m) Elevation (m
AOD)
214
Approximate
Distance to
Nearest Turbine
(m)
Hardwick (H8) 448166 386415 112 890
9.21 The background noise survey was undertaken over the period 9th May
2008 to 3rd July 2008. The sound level meters were set to log the LA90 and
LAeq noise levels over the required ten minute intervals continuously over
the deployment period.
9.22 Simultaneous wind speed and direction measurements were measured
using anemometry equipment located at 10 metres and 38m height
respectively on a 60m mast located within the proposed wind farm site. A
rain gauge was also installed at H5 to monitor rainfall over the duration of
the noise monitoring survey.
9.23 Wind speed/direction data and rainfall data were collected over the same
time-scale, and averaged over the same ten minute periods as the noise
data to provide the analysis of the measured background noise as a
function of wind speed and direction. The clocks on the sound level meters
were set to the BT Talking Clock (British Summer Time (BST)) and the
anemometry mast was set up to Greenwich Mean Time (GMT). The data
from the anemometry mast data was converted to BST (GMT+1hr) to
correspond with the noise data monitoring periods.
9.24 The noise meters were calibrated on deployment. Calibration and battery
changes took place at approximately weekly intervals. No drifts greater
than 0.2 dB(A) in calibration were found to have occurred on any of the
noise meters. This is within the normal tolerances for such measurements.
9.25 Table 9.2 provides a summary of the range of background noise levels
measured during the monitoring period. Background noise levels during
periods of rainfall have been excluded from this data in order to provide an
accurate account of the background noise levels.
Table 9.2 Summary of Background Noise Levels (dB(A))
Receptor Quiet Daytime LA90, 10 min Night-time LA90, 10 min
Morthen (H1) 29.2 – 61.2 29.2 – 58.1
Brampton-en-lemorthen
(H2)
28.0 – 67.6 24.9 – 57.1
Thurcroft (H3) 26.1 – 58.2 22.3 - 57.3
Ulley (H4) 31.7 – 62.5 26.4 – 56.3
Penny Hill (H5) 45.2 – 63.5 37.2 – 58.8
Penny Hill Wind Farm
Environmental Statement