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The Clocaenog Forest Wind Farm Order 2014
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- art. 36(1A) inserted by S.I. 2017/1197 art. 4(2)
1.—(1) Values of the LA90,10min noise statistic shall be measured at the complainant’s property using a sound level meter of EN 60651/BS EN 60804 Type 1, or EN 61672 Class 1 quality (or the replacement thereof) set to measure using a fast time A-weighted response as specified in BS EN 60651/BS EN 60804 or BS EN 61672-1 (or the equivalent UK adopted standard in force at the time of the measurements). This shall be calibrated in accordance with the procedure specified in BS 4142:1997 (or its replacement). These measurements shall be made in such a way that the requirements of paragraph 3 shall also be satisfied.E+W
(2) The microphone should be mounted at 1.2 to 1.5 m above ground level, fitted with a two layer windshield (or suitable alternative approved in writing from the relevant planning authority), and placed outside the complainant’s dwelling. Measurements should be made in “free-field” conditions. To achieve this, the microphone should be placed at least 3.5m away from the building facade or any reflecting surface except the ground at a location that shall be agreed with the relevant planning authority.
(3) The LA90,10min measurements shall be synchronised with measurements of the 10-minute arithmetic mean average wind speed and with operational data, including power generation information for each wind turbine, from the turbine control systems of the authorised development.
(4) The undertaker shall continuously log arithmetic mean wind speed and arithmetic mean wind direction data in 10 minute periods from the hub height of anemometers located on the site permanent mast unless otherwise requested by the relevant planning authority to enable compliance with the requirements to be evaluated. The mean wind speed data shall be ‘standardised’ to a reference height of 10 metres as described in ETSU-R-97(1) at page 120 using a reference roughness length of 0.05 metres. It is this standardised 10m height wind speed data which is correlated with the noise measurements of paragraph 2(1) in the manner described in paragraph 2(3).
Commencement Information
I1Sch. 1 Pt. 4 para. 1 in force at 2.10.2014, see art. 1
(1)
“The Assessment and Rating of Noise from Wind Farm” (1997) published by the Energy Technology Support Unit (ETSU) for the Department of Trade and Industry (DTI).
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