1.2.3 Equipment and Procedure
Measurements would be taken in accordance with procedures within BS 7445: Description and measurement of environmental noise using Type 1 / Class 1 sound level measuring equipment.
1.2.4 Results
The results of the measurements would be documented in a format suitable for submission to the local authority. If a significant impact was identified, mitigation measures would be recommended to reduce the noise levels. Further compliance testing would be undertaken to identify whether the measures had successfully reduced noise levels such that the noise impact was deemed not significant.
1.3 Converter Station Noise Monitoring
1.3.1 Rationale Should complaints be received as a result of noise from the operation of the Converter Station, noise measurements will be undertaken to identify whether noise level criteria for significant effect is being exceeded. The noise level criteria for significant operational noise effect are provided within Volume 3, Chapter 26.
1.3.2 Method
Measurements shall be taken by a suitably qualified acoustician in the vicinity of the property or properties from which the complaint originated. Where access to a property is not granted to undertake such measurements, measurements shall be undertaken at a location that is considered by the suitably qualified acoustician to be representative of noise levels at the property or properties in question.
Measurements would be taken for a period of an hour during the quietest part of the night (assumed 12:00-04:00) during a time when the Converter Station is known to be fully operational on full load.
Where appropriate, transient noise sources associated with noise sources other than the Converter Station (or other industrial noise sources in the area) will be isolated and removed from the measurements. In addition, consideration will be given to logarithmically subtracting baseline background noise levels measured in 2011 from the Converter Station measurements where appropriate (baseline levels dominated by the existing Bramford substation should not be subtracted as the Bramford Substation is considered within the cumulative assessment).
1.3.3 Equipment and Procedure
Measurements would be taken in accordance with procedures within BS 7445: Description and measurement of environmental noise using Type 1 / Class 1 sound level measuring equipment.
EAOW
Noise Prediction Methodology P41388
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