Camilty Wind Farm - Partnerships for Renewables

Camilty Wind Farm - Partnerships for Renewables Camilty Wind Farm - Partnerships for Renewables

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Camilty Wind Farm 8 Noise 8.1 Introduction and Overview 8.1.1 This chapter assesses the potential noise and vibration effects of the proposed wind farm with respect to construction, operation and decommissioning. 8.1.2 The chapter describes the methods used to gather baseline data representative of the closest identified noise sensitive receptors, likely construction, operational and decommissioning effects, mitigation measures required to prevent, reduce or offset any significant adverse effects predicted, and the significance of any residual effects after these measures have been implemented. 8.1.3 This chapter is necessarily technical in nature; a glossary of acoustic terms is presented as Appendix 8.1. Background information on wind turbine noise is provided in Appendix 8.2. 8.2 Methodology Policy and Guidance Planning Policy and Legislative Context 8.2.1 The following policy and guidance documents have been referred to for the purposes of this assessment: • The Control of Pollution Act (CoPA) 1974, Part III; • Planning Advice Note (PAN) 1/2011;Planning and Noise; • The Working Group on Noise from Wind Turbines The Assessment & Rating of Noise from Wind Farms (ETSU-R-97) (1996); • Institute of Acoustics (IoA) Bulletin article Volume 34 No. 2, March / April 2009; • IoA consultation paper July 2012 A good practice guide to the application of ETSU-R- 97 for wind turbine noise assessment. 8.2.2 These documents are described in more detail below. The Control of Pollution Act 1974, Part III 8.2.3 Section 60, Part III of the Control of Pollution Act 1974 (CoPA) refers to the control of noise on construction sites. It provides legislation by which local authorities can control noise from construction sites to limit noise disturbance. 8.2.4 Section 72, Part III of the CoPA refers to best practicable means (BPM). It defines BPM as reasonably practicable, having regards among other things to local conditions and circumstances, to the current state of technical knowledge and to the financial implications, whilst Means refers to the design, installation, maintenance and manner and periods of operation of plant and machinery, and the design, construction and maintenance of buildings and acoustic structures. March 2013 8-1 ES Chapter 8 Noise Copyright Partnerships for Renewables Development Co. Ltd 2013 ©

Camilty Wind Farm Planning Advice Note (PAN) 1/2011 Planning and Noise 8.2.5 This Planning Advice Note provides advice on the role of the planning system in helping to prevent and limit the adverse effects of noise. Information and advice on noise impact assessment methods is provided in the associated Technical Advice Note Assessment of Noise. It is considered to reflect current advice from the Scottish Government. 8.2.6 PAN1/2011 and the associated TAN refer the assessor to the guidance set out in ETSU-R-97 to determine the effect of wind energy developments on nearby sensitive receptors. The TAN makes reference to summary findings of the IoA Bulletin paper (see below) concerning recommended methodology for assessing local wind shear and the propagation of sound from operational turbines. It also refers to the agreement amongst the authors of the paper that there is no robust evidence of the adverse effects of low frequency sound, infrasound and ground borne vibration from operational turbines. The Working Group on Noise from Wind Turbines The Assessment & Rating of Noise from Wind Farms (ETSU-R-97) 8.2.7 ETSU-R-97, published in September 1996, was the result of deliberations of the Working Group on Noise from Wind Turbines, which was set up in 1993 by the Department of Trade and Industry (DTI) to derive guidelines for assessing noise from wind turbines. It provides a recognised and accepted method for assessing wind turbine noise and, in particular, for setting external noise limits to protect residential amenity and prevent sleep disturbance. 8.2.8 The assessment considers predicted levels of operational turbine noise in relation to derived limits across the relevant range of wind speeds, typically considered to be wind speeds up to 12m/s. The limit at each wind speed, when corrected to 10m above local ground height, is derived in relation to prevailing background noise level. For quiet daytime periods, the limit should be in the range of 35 – 40dB L A90,10min or 5dB(A) above measured background, whichever is the greater. For night time periods, the limit should be 43dB L A90,10min or 5dB(A) above measured background, whichever is the greater. 8.2.9 ETSU-R-97 allows for an increased lower fixed limit where residents are financially involved with the wind farm development (page 66). There are no financially involved properties with respect to the proposed wind farm. 8.2.10 The prevailing background noise level across the relevant range of wind speeds is determined as the best-fit regression curve when the measured background noise values, in 10-minute periods (L A90,10min ), are plotted against concurrent average wind speed standardised to 10 m above local ground height, also in 10-minute periods. 8.2.11 The quiet daytime periods are chosen to reflect times when people might be outside in their gardens and are defined as: • All weekday evenings from 6 pm to 11 pm; • Saturday afternoon and evenings from 1 pm to 11 pm; and • All day Sunday 7 am to 11 pm. 8.2.12 For the quiet daytime periods, the limit selected between 35 and 40 dB L A90,10min should depend on: • The number of dwellings in the neighbourhood of the wind farm; • The effect of noise limits on the number of kWh generated; and March 2013 8-2 ES Chapter 8 Noise Copyright Partnerships for Renewables Development Co. Ltd 2013 ©

<strong>Camilty</strong> <strong>Wind</strong> <strong>Farm</strong><br />

8 Noise<br />

8.1 Introduction and Overview<br />

8.1.1 This chapter assesses the potential noise and vibration effects of the proposed wind farm<br />

with respect to construction, operation and decommissioning.<br />

8.1.2 The chapter describes the methods used to gather baseline data representative of the closest<br />

identified noise sensitive receptors, likely construction, operational and decommissioning<br />

effects, mitigation measures required to prevent, reduce or offset any significant adverse<br />

effects predicted, and the significance of any residual effects after these measures have been<br />

implemented.<br />

8.1.3 This chapter is necessarily technical in nature; a glossary of acoustic terms is presented as<br />

Appendix 8.1. Background in<strong>for</strong>mation on wind turbine noise is provided in Appendix 8.2.<br />

8.2 Methodology<br />

Policy and Guidance<br />

Planning Policy and Legislative Context<br />

8.2.1 The following policy and guidance documents have been referred to <strong>for</strong> the purposes of this<br />

assessment:<br />

• The Control of Pollution Act (CoPA) 1974, Part III;<br />

• Planning Advice Note (PAN) 1/2011;Planning and Noise;<br />

• The Working Group on Noise from <strong>Wind</strong> Turbines The Assessment & Rating of Noise<br />

from <strong>Wind</strong> <strong>Farm</strong>s (ETSU-R-97) (1996);<br />

• Institute of Acoustics (IoA) Bulletin article Volume 34 No. 2, March / April 2009;<br />

• IoA consultation paper July 2012 A good practice guide to the application of ETSU-R-<br />

97 <strong>for</strong> wind turbine noise assessment.<br />

8.2.2 These documents are described in more detail below.<br />

The Control of Pollution Act 1974, Part III<br />

8.2.3 Section 60, Part III of the Control of Pollution Act 1974 (CoPA) refers to the control of noise<br />

on construction sites. It provides legislation by which local authorities can control noise from<br />

construction sites to limit noise disturbance.<br />

8.2.4 Section 72, Part III of the CoPA refers to best practicable means (BPM). It defines BPM as<br />

reasonably practicable, having regards among other things to local conditions and<br />

circumstances, to the current state of technical knowledge and to the financial implications,<br />

whilst Means refers to the design, installation, maintenance and manner and periods of<br />

operation of plant and machinery, and the design, construction and maintenance of buildings<br />

and acoustic structures.<br />

March 2013 8-1 ES Chapter 8<br />

Noise<br />

Copyright <strong>Partnerships</strong> <strong>for</strong> <strong>Renewables</strong> Development Co. Ltd 2013 ©

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