CHERRY TREE WIND FARM ENVIRONMENTAL NOISE … · Cherry Tree Wind Farm Environmental Noise...

Sonus Pty Ltd 17 Ruthven Avenue

ADELAIDE SA 5000 Phone: 08 8231 2100

Facsimile: 08 8231 2122 www.sonus.com.au

ABN: 67 882 843 130

CHERRY TREE WIND FARM

ENVIRONMENTAL NOISE ASSESSMENT

S3768C3

18th April 2012

Cherry Tree Wind Farm Environmental Noise Assessment S3768C3 18th April 2012

Page ii TABLE OF CONTENTS

INTRODUCTION .................................................................................................................. 1

THE NEW ZEALAND STANDARD ....................................................................................... 2

Criteria ............................................................................................................................... 2

High Amenity Areas ........................................................................................................... 2

Landowners with Commercial Agreements ........................................................................ 3

Background Noise Monitoring ............................................................................................ 3

SUBSTATION NOISE ........................................................................................................... 6

ASSESSMENT ..................................................................................................................... 7

ISO 9613-2:1996 ............................................................................................................... 8

Predicted Turbine Noise Levels ......................................................................................... 9

Infrasound ....................................................................................................................... 10

Substation ....................................................................................................................... 11

CONCLUSION .................................................................................................................... 13

APPENDICES..................................................................................................................... 14

Appendix A: Location of Operational Noise Sources........................................................ 14

Appendix B: Residence Locations ................................................................................... 15

Appendix C: Photographs of Logger Locations ................................................................ 18

Appendix D: Noise Correlations ....................................................................................... 20

Appendix E: Predicted Wind Farm Noise and Relevant Criteria ....................................... 22

Appendix F: Noise Contour .............................................................................................. 25


Page 1 INTRODUCTION

Sonus Pty Ltd has been engaged by Infigen Energy to conduct an environmental noise

assessment of the proposed Cherry Tree Wind Farm, located near Seymour, Victoria.

The assessment has been conducted in accordance with New Zealand Standard

NZS 6808:2010 “Acoustics – Wind Farm Noise” (the New Zealand Standard), and has been

based on:

The layout of the proposed wind farm, detailed in Appendix A;

The location of residences in the vicinity of the proposed wind farm, detailed in

Appendix B;

Vestas V112 3MW wind turbines being used for the proposed layout; and,

Background noise monitoring conducted at 3 relevant locations between the 23rd of

November and the 21st of December 2011.


Page 2 THE NEW ZEALAND STANDARD

The Policy and planning guidelines for development of wind energy facilities in Victoria1

require that an acoustic assessment is conducted in accordance with the New Zealand

Standard.

Criteria

Section 5.2 of the New Zealand Standard states:

As a guide to the limits of acceptability at a noise sensitive location, at any wind speed

wind farm sound levels LA90(10min) should not exceed the background sound level by more

than 5dB, or a level of 40 dB LA90(10min), whichever is the greater.

High Amenity Areas

The New Zealand Standard contains provisions for residences situated in high amenity

areas, deemed applicable when “a plan promotes a higher degree of protection of amenity

related to the sound environment of a particular area”. In high amenity areas, the noise limit

becomes the background noise level plus 5 dB(A), or a level of 35 dB(A), whichever is

greater.

Dwellings within the vicinity of the proposed wind farm are located within a “Farming Zone”

of the Mitchell and Murrindindi shire councils. For the purposes of this assessment, it is

assumed that such a zone does not promote a specific and higher degree of protection of

amenity.

1 Policy and planning guidelines for development of wind energy facilities in Victoria, Victorian

Department of Planning and Community Development, August 2011


Page 3 Landowners with Commercial Agreements

The landowners of several residences have entered into commercial agreements with the

developer of the wind farm (associated landowners). The associated landowners are listed in

Appendix B.

Suitable noise criteria will be agreed between the developer and the associated landowner.

However, to protect associated landowners in this project from unreasonable interference

to amenity, reference has been made to the WHO Guidelines 2 . The WHO Guidelines

recommend an indoor level of 30 dB(A) is achieved to protect against sleep disturbance. The

indoor limit of 30 dB(A) equates to an outdoor noise level of 45 dB(A) with windows open or

52 dB(A) with windows closed.

It is proposed that the base noise level at associated landowners achieve the

recommendations of the WHO Guidelines. The WHO Guidelines recommended levels are

not as onerous as the New Zealand Standard’s limits of acceptability.

Background Noise Monitoring

Initial predictions of noise from the wind farm resulted in noise levels below 35 dB(A) at all

dwellings without a commercial agreement (non-associated landowners). The New Zealand

Standard does not require background noise monitoring where the predicted noise level is

below 35 dB(A), however 3 monitoring locations (R20, R42 and R75) were selected, where

preference was given to non-associated landowners with the highest predicted noise levels,

subject to access being granted.

The background noise levels were measured between the 23rd of November and the 21st of

December 2011, in accordance with the New Zealand Standard.

2 “WHO Guidelines for Community Noise” World Health Organisation, 1999


Page 4 The background noise was measured with Rion NL21 type 2 sound level meters, which have

a noise floor less than 20 dB(A), calibrated at the beginning and end of the measurement

period with a Rion NC74 Calibrator. All microphones were fitted with 90mm diameter

weather proof windshields, with the microphone approximately 1500mm above ground level.

Each noise logger was positioned at an equivalent distance from the facade of the dwelling

as any significant trees at that location, whilst minimising the influence of fixed noise sources

such as local domestic pumps or air conditioning units. The background noise level was

measured in 10 minute intervals at each of the monitoring locations. Photographs of the

noise monitoring equipment at each location are provided in Appendix C.

During the background noise monitoring campaign Infigen Energy measured the wind speed

with a locally positioned meteorological mast, in 10 minute intervals at various heights.

Details of the meteorological mast are provided below in Table 1.

Table 1: Meteorological Mast Details

Measurement Heights (m)

Position (NAD 83 – Zone55)

Easting Northing

80.4, 66, 41.2, 11.2 346685 5892457

During the background noise measurement periods, rainfall and wind speed at the

microphone height (approximately 1.5m above ground level) were also measured at

Residence R75, using a HOBO Micro Station Logger H21-002. The rainfall and wind speed

data collected were used to determine the periods when weather directly on the microphone

may have affected the background noise measurement. This affected noise data was

discarded before further analysis. The discarded data is for periods where rainfall was

measured and/or where the measured wind speed exceeded 5 m/s at the microphone for

more than 90% of the measurement period.

In addition to weather, other noise events have been excluded. Specifically, where the

LA90,10min noise level rose sharply for a short period of time, indicating a local intermittent

event. An activity log was maintained by the residents at R75, which was used to assist in

the removal of data at this location.


Page 5 Table 2 summarises the number of remaining data points at each monitoring location,

following the removal procedure. It is noted that the New Zealand Standard requires a

minimum of 10 days of logging, which typical results in 1440 useable data points.

Table 2: Useable Data Points at Monitoring Location

Residence ID Number of Remaining

Data Points

R20 3428

R42 3398

R75 3333

The resultant background noise data collected at the monitoring locations were correlated

with wind speed data at the top of the local meteorological mast. A least squares regression

analysis of the data was undertaken to determine the line of best fit for the correlations in

accordance with the New Zealand Standard. The data and the regression curves are shown

in Appendix D. Based on this regression analysis, the background noise level (LA90,10min) at a

range of wind speeds within the operating range of the turbines is shown in Table 3 below.

Table 3: Background Noise Levels at Monitoring Location (dB(A))

80.4m AGL Wind Speed (m/s)

4 5 6 7 8 9 10 11 12 13

R20 35 35 36 36 37 37 38 38 39 40

R42 30 30 30 30 31 31 32 33 35 36

R75 25 27 29 31 32 34 35 36 38 39

From the above, the assessment criteria at each residential location have been determined

for both associated and non-associated landowners, summarised in Appendix E. Generally,

the background noise level measurements are used to represent dwellings where noise

monitoring was not conducted. In these circumstances, it is common practice to adopt the

criteria of the monitoring location which best represents that dwelling. However, in this

instance, a conservative approach has been taken and the lowest measured background

level at any of the 3 locations has been applied at all other dwellings to derive the criteria.


Page 6 SUBSTATION NOISE

To assess substation noise the Noise from Industry in Regional Victoria Guidelines3 (the

NIRV) has been referenced. The NIRV specifically excludes the assessment of wind energy

facilities, except for noise from substations and transmission infrastructure.

The NIRV provides recommended maximum noise levels based on the planning zone of the

noise source and noise receiver. Based on the “Farming Zone” in which the turbines and

relevant residences are located, the most onerous (i.e. lowest) criterion is 36 dB(A) LAeq4.

3 Noise from Industry in Regional Victoria, EPA Victoria, October 2011.

4 This criterion corresponds to the recommended night-time (10pm to 7am) maximum noise level.


Page 7 ASSESSMENT

Noise from the wind farm has been predicted based on the use of Vestas V112 3MW model

turbines. The proposed wind farm consists of 16 turbines with the coordinates of each given

in Appendix A.

The predictions of turbine noise have been based on manufacturers sound power level data.

The octave band sound power levels used to predict noise from the wind farm are provided

below in Table 4.

Table 4: Vestas V112 Sound Power Levels (dB(A))

Octave Band Centre

Frequency (Hz)

Hub-Height Wind Speed (m/s)

4 5 6 7 8 9 10 11 12 13

31.5 65.2 66.8 68.7 70.5 73.8 76.0 77.1 77.6 77.5 77.4

63 75.4 77.0 78.9 80.9 84.5 87.4 89.5 90.2 90.4 90.4

125 82.3 83.9 86.0 88.2 91.2 93.5 95.2 95.8 96.0 96.1

250 85.2 86.8 89.0 91.4 93.8 95.8 97.0 96.6 96.1 95.8

500 87.5 89.1 91.3 93.9 96.6 98.5 99.4 99.0 98.5 98.1

1000 89.4 91.0 93.1 95.6 98.7 100.5 101.4 101.6 101.7 101.6

2000 88.3 89.9 92.2 95.1 96.3 97.4 98.4 99.5 100.0 100.3

4000 82.7 84.3 86.5 89.2 90.5 91.2 91.9 94.3 95.1 95.6

8000 66.7 68.3 70.7 73.7 77.8 79.7 80.7 83.9 85.3 86.4

Total 94.5 96.1 98.3 100.9 103.3 104.5 106.1 106.4 106.5 106.5

The predictions have been conducted without a penalty for the presence of tonal

characteristics. To provide certainty with respect to tonality, it is recommended that a

guarantee is sought that the manufacturers achieve a “tonal audibility” (ΔLa,k) of 0 dB when

assessed in accordance with IEC61400-115 at a distance specified in that standard. The

guarantee should be specified as part of the procurement process.

5 IEC61400-11 Wind turbine systems – Part 11: Acoustic noise measurement techniques


Page 8 As well as separately considering noise from the substation against the NIRV, noise from the

substation has been included in the wind turbine noise predictions, to provide a conservative

assessment approach. It is proposed that a 45 MVA transformer is to be located in the

position listed in Appendix A. The octave band sound power levels of the transformer have

been derived from the Australian/New Zealand Standard AS/NZS 60076.10:20096. Table 5

lists the octave band sound power levels used to predict the transformer noise.

Table 5: 45MVA Transformer, Sound Power Levels (dB(A))

Octave Band Centre Frequency

(HZ) 63 125 250 500 1000 2000 4000 8000 Total

SWL (dB(A)) 68.3 76.3 83.8 86.2 78.4 75.6 68.4 64.3 89.1

It is recommended that a guarantee is sought as part of the procurement process that the

transformer combined with ancillary equipment achieves the above sound power levels.

ISO 9613-2:1996

Noise predictions were conducted using the propagation model, ISO 9613-2:1996 “Acoustics

– Attenuation of sound during propagation outdoors” (ISO 9613). This noise propagation

model is widely accepted as an appropriate model for the assessment of wind farms when

appropriate inputs are used. The ISO 9613 model has the ability to take into account the

distance between the source and receiver, topography, hardness of the ground and

atmospheric absorption at different frequencies.

The ISO-9613 model is based on “meteorological conditions favourable to propagation…

These conditions are for downwind propagation...or, equivalently, propagation under a well

developed moderate ground based temperature inversion” (ISO-9613).

6

Australian/New Zealand Standard AS/NZS 60076.10:2009, Power Transformers Part 10:

Determination of sound levels (IEC 60076-10, Ed.1 (2001) MOD).


Page 9 The assessment has been based on the following inputs, agreed upon by UK experts7 in a

joint paper:

Unwarranted sound power levels

10°C temperature

70% relative humidity

Acoustically hard ground

Barrier attenuation of no greater than 2 dB(A)

1.5m receiver height

Predicted Turbine Noise Levels

An analysis of the effect of wind turbine hub-height on the predicted noise level was

conducted for available hub-heights of the Vestas V112 of between 84 and 100m. The

change in the hub-height has a negligible effect on the predicted noise levels. For the

purposes of this assessment the noise predictions were therefore conducted at a hub-height

of 84m above ground level, which is of a similar order to the top of the meteorological mast.

The predicted noise from the wind farm has been assessed against the criteria contained

within the New Zealand Standard. Appendix E lists the predicted noise from the turbines and

the criteria for each residence at each relevant wind speed. Based on the predicted noise

levels shown in Appendix E, the turbines are predicted to easily comply with the relevant

criteria at all residences (both with and without an agreement) for all wind speeds.

To supplement the assessment summary in Appendix E, a noise contour map has been

included as Appendix F. The contour map has been generated for the wind speed

associated with the highest sound power level of the Vestas V112 model turbine (13m/s).

The highest predicted noise level for a non-associated residence is 33 dB(A), at residence

R62 for a wind speed of 13 m/s. At such levels, a background noise analysis is not required,

and the “high amenity” criteria set aside by the Standard would also be achieved.

7 Institute of Acoustics Vol 34 No.2 March/April 2009, “Prediction and Assessment of Wind Turbine

Noise – Agreement about relevant factors for noise assessment from wind energy projects”


Page 10 Whilst the Vestas V112-3MW wind turbine model has been considered for the proposed

layout and found to easily achieve the criteria provided by the New Zealand Standard for any

hub-height up to 100m, it may not be the final turbine selection for the wind farm.

Notwithstanding, any other model of wind turbine with equivalent or lower sound power

levels will also easily achieve the New Zealand Standard.

Infrasound

Infrasound is generally defined as noise at frequencies less than 20 Hz. The generation of

infrasound was detected on early turbine designs, which incorporated the blades ‘downwind’

of the tower structure. The mechanism for the generation was that the blade passed through

the wake caused by the presence of the tower.

Modern turbines locate the blades upwind of the tower and it is found that turbines of

contemporary design produce much lower levels of infrasound.

Infrasound is often described as inaudible, however, sound below 20 Hz remains audible

provided that the sound level is sufficiently high. The thresholds of hearing for infrasound

have been determined in a range of studies. Non-audible perception of infrasound through

felt vibrations in various parts of the body only occurs at levels well above the threshold of

hearing.

Weighting networks are applied to measured sound pressure levels to adjust for certain

characteristics. The A-weighting network (dB(A)) is the most common, and it is applied to

simulate the human response for sound in the most common frequency range. The A-

weighting network is used by the New Zealand Standard. The G-weighting network has been

standardised to determine the human perception and annoyance due to noise that lies within

the infrasound frequency range.


Page 11 A common audibility threshold from the range of studies is an infrasound noise level of

85 dB(G) or greater. This is used by the Queensland Department of Environment and

Resource Management’s draft Guideline for the assessment of low frequency noise as the

acceptable level of infrasound in the environment from a noise source to protect against the

potential onset of annoyance and is consistent with other approaches, including the UK

Department for Environment, Food and Rural Affairs.

Whilst the aerodynamic noise from a rotating turbine blade produces energy in the

infrasound range, a large range of measurements of infrasound noise emissions from

modern upwind turbines indicates that at distances of 200 metres, infrasound is in the order

of 25 dB below the recognised perception threshold of 85 dB(G). A 25 dB difference is

significant and represents at least a 100 fold difference in energy content. Infrasound also

reduces in level when moving away from the source, and separation distances between wind

farms and dwellings are well in excess of 200m.

Notwithstanding the above, there are natural sources of infrasound including wind and

breaking waves, and a wide range of man-made sources such as industrial processes,

vehicles and air conditioning and ventilation systems that make infrasound prevalent in the

natural and urban environment at a similar or greater level than that regularly measured

within 200m of a modern wind turbine.

Substation

Noise from the substation has been included into the wind farm predictions. At residence

R70, the worst case residence (closest to the proposed substation location), located

approximately 1840m from the proposed substation, the predicted substation noise is

14 dB(A). This level easily achieves the criterion of 36 dB(A) recommended by the NIRV,

and as such will not adversely impact on the amenity of residences in the locality of the wind

farm.


Page 12 It is understood that the location of the substation has not been finalised, and flexibility in its

location is desired. Based on predictions of noise from the substation, its location can vary

anywhere within a 1km radius of the nominated location, whilst maintaining compliance with

the NIRV and the New Zealand Standard at all residences.


Page 13 CONCLUSION

An environmental noise assessment of the proposed Cherry Tree Wind Farm, comprising a

16 turbine layout, has been made. Noise from operation of the wind farm has been assessed

against the New Zealand Standard.

It is predicted that the wind farm will easily achieve the New Zealand Standard at all

dwellings for the proposed layout and a Vestas V112-3MW model turbine selection with hub-

heights up to 100m.

In addition, any turbine with sound power levels equal to or less than that assessed for the

V112 turbines, will also easily achieve the New Zealand Standard.

Noise from the proposed substation has been assessed against the provisions of the Noise

from Industry in Regional Victoria Guidelines (the NIRV), and conservatively included in the

wind farm predictions. Based on the nominated location of the substation, it is predicted that

the substation will easily comply with the NIRV at all relevant dwellings.


Page 14 APPENDICES

Appendix A: Location of Operational Noise Sources

Turbine ID Easting Northing Turbine ID Easting Northing

WT01 345477 5893385 WT10 345251 5892059

WT02 345762 5893250 WT11 345019 5892053

WT03 346068 5893036 WT12 345186 5891362

WT04 346317 5892775 WT13 344782 5892039

WT05 346579 5892639 WT14 344561 5891994

WT06 346834 5892599 WT15 344335 5891945

WT07 347081 5892580 WT16 344661 5891298

WT08 346010 5892384 Substation

WT09 345517 5892182 - 345987 5892820


Page 15 Appendix B: Residence Locations

Residence ID Associated Easting Northing Closest Turbine

R1 No 346453 5886700 WT12, 4831(m)

R2 No 346908 5887108 WT12, 4589(m)

R3 No 344570 5887559 WT16, 3740(m)

R4 No 348443 5887575 WT12, 4995(m)

R5 No 344679 5887658 WT16, 3640(m)

R6 No 346167 5887743 WT12, 3750(m)

R7 No 345923 5887770 WT12, 3667(m)

R8 No 343899 5887831 WT16, 3550(m)

R9 No 343866 5887841 WT16, 3547(m)

R10 No 343242 5887846 WT16, 3732(m)

R11 No 343790 5887865 WT16, 3542(m)

R12 No 346323 5887931 WT12, 3614(m)

R13 No 342703 5888009 WT16, 3828(m)

R14 No 345869 5888142 WT12, 3292(m)

R15 No 343728 5888180 WT16, 3255(m)

R16 No 345828 5888214 WT12, 3213(m)

R17 No 342914 5888415 WT16, 3371(m)

R18 No 342609 5888531 WT16, 3445(m)

R19 Yes 345005 5888658 WT16, 2662(m)

R20 No 343961 5888709 WT16, 2682(m)

R21 No 342279 5889027 WT16, 3291(m)

R22 No 342699 5889038 WT16, 2993(m)

R23 No 342386 5889243 WT16, 3066(m)

R24 No 342781 5889258 WT16, 2774(m)

R25 No 342594 5889326 WT16, 2857(m)

R26 No 343459 5889638 WT16, 2049(m)

R27 No 343306 5889696 WT16, 2098(m)

R28 No 341827 5889798 WT16, 3206(m)

R29 No 341500 5889850 WT16, 3477(m)

R30 No 341443 5890171 WT15, 3393(m)

R31 No 341272 5890283 WT15, 3485(m)

R32 No 341834 5890335 WT15, 2974(m)

R33 No 341462 5890366 WT15, 3278(m)

R34 No 341789 5890426 WT15, 2965(m)


Page 16


R35 No 340986 5890512 WT15, 3643(m)

R36 No 340877 5890846 WT15, 3628(m)

R37 Yes 343008 5891173 WT15, 1535(m)

R38 No 340559 5891245 WT15, 3840(m)

R39 No 350774 5891683 WT07, 3800(m)

R40 No 350970 5891704 WT07, 3986(m)

R41 No 340635 5891704 WT15, 3708(m)

R42 No 349889 5891767 WT07, 2923(m)

R43 No 340873 5891863 WT15, 3463(m)

R44 No 340925 5892051 WT15, 3412(m)

R45 No 340693 5892056 WT15, 3644(m)

R46 No 340640 5892106 WT15, 3699(m)

R47 No 340894 5892185 WT15, 3449(m)

R48 No 339443 5892193 WT15, 4898(m)

R49 No 340678 5892206 WT15, 3666(m)

R50 No 340803 5892304 WT15, 3550(m)

R51 No 340653 5892361 WT15, 3705(m)

R52 No 340697 5892405 WT15, 3667(m)

R53 No 340559 5892516 WT15, 3819(m)

R54 No 339554 5892606 WT15, 4826(m)

R55 No 341835 5892666 WT15, 2602(m)

R56 No 340593 5892834 WT15, 3846(m)

R57 No 340491 5892907 WT15, 3963(m)

R58 No 339523 5892935 WT15, 4913(m)

R59 No 340303 5893001 WT15, 4168(m)

R60 No 340493 5893002 WT15, 3985(m)

R61 No 340702 5893129 WT15, 3821(m)

R62 No 349075 5893204 WT07, 2089(m)

R63 No 341863 5893215 WT15, 2779(m)

R64 No 340048 5893234 WT15, 4477(m)

R65 No 339588 5893324 WT15, 4943(m)

R66 No 349542 5893386 WT07, 2590(m)

R67 No 349611 5893391 WT07, 2657(m)

R68 No 341385 5893536 WT15, 3352(m)

R69 No 340258 5894454 WT15, 4787(m)

R70 Yes 346788 5894467 WT02, 1592(m)

R71 Yes 346803 5894681 WT02, 1770(m)


Page 17


R72 No 349586 5894817 WT07, 3358(m)

R73 No 340692 5894848 WT15, 4658(m)

R74 No 349156 5894899 WT07, 3112(m)

R75 No 346231 5895523 WT01, 2267(m)

R76 No 348851 5895524 WT07, 3435(m)

R77 No 346397 5895702 WT01, 2493(m)

R78 No 348321 5895798 WT07, 3449(m)

R79 No 349304 5896007 WT07, 4085(m)

R80 No 346374 5896055 WT01, 2817(m)

R81 No 341909 5896089 WT01, 4477(m)

R82 No 346495 5896143 WT01, 2940(m)

R83 No 348831 5896261 WT07, 4076(m)

R84 No 348605 5896979 WT07, 4656(m)

R85 No 345303 5897688 WT01, 4307(m)

R86 No 344847 5897831 WT01, 4490(m)

R87 No 346275 5897925 WT01, 4610(m)

R88 No 345975 5897958 WT01, 4600(m)

R89 No 345271 5898009 WT01, 4629(m)

R90 No 345540 5898038 WT01, 4653(m)

R91 No 344911 5898083 WT01, 4732(m)

R92 No 345968 5898092 WT01, 4733(m)

R93 No 344826 5898092 WT01, 4752(m)

R94 No 344781 5898107 WT01, 4773(m)

R95 No 346319 5898128 WT01, 4817(m)

R96 No 344435 5898187 WT01, 4914(m)


Page 18 Appendix C: Photographs of Logger Locations

R20

R42


Page 19

R75


Page 20 Appendix D: Noise Correlations


Page 21


Page 22 Appendix E: Predicted Wind Farm Noise and Relevant Criteria

Criteria (dB(A)) Predicted Noise Level (dB(A))

Wind Speed (m/s)

4 5 6 7 8 9 10 11 12 13 4 5 6 7 8 9 10 11 12 13

R1 40 40 40 40 40 40 40 40 40 41 14 15 17 20 23 24 26 26 26 26

R2 40 40 40 40 40 40 40 40 40 41 14 15 17 20 23 24 26 26 26 26

R3 40 40 40 40 40 40 40 40 40 41 16 17 19 22 24 26 28 28 28 28

R4 40 40 40 40 40 40 40 40 40 41 13 15 17 19 22 24 26 26 26 26

R5 40 40 40 40 40 40 40 40 40 41 16 17 20 22 25 26 28 28 28 28

R6 40 40 40 40 40 40 40 40 40 41 16 17 19 22 24 26 28 28 28 28

R7 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R8 40 40 40 40 40 40 40 40 40 41 16 17 20 22 25 26 28 28 28 28

R9 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 28 29 28 28

R10 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R11 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 26 28 28 28 28

R12 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R13 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 28 29 29 28

R14 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 29 29 29

R15 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R16 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 30 30 30 29

R17 40 40 40 40 40 40 40 40 40 41 17 18 20 23 26 27 29 29 29 29

R18 40 40 40 40 40 40 40 40 40 41 17 18 20 23 26 27 29 29 29 29

R19 45 45 45 45 45 45 45 45 45 45 18 20 22 24 27 29 31 31 31 31

R20 40 40 41 41 42 42 43 43 44 45 18 20 22 24 27 28 30 30 30 30

R21 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 30 30 30 30

R22 40 40 40 40 40 40 40 40 40 41 18 19 22 24 27 28 30 30 30 30

R23 40 40 40 40 40 40 40 40 40 41 18 19 22 24 27 28 30 30 30 30

R24 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 29 31 31 31 30

R25 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 29 31 31 31 30

R26 40 40 40 40 40 40 40 40 40 41 20 22 24 26 29 30 32 32 32 32

R27 40 40 40 40 40 40 40 40 40 41 20 22 24 26 29 30 32 32 32 32

R28 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 28 30 30 30 30

R29 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 30 30 30 30

R30 40 40 40 40 40 40 40 40 40 41 18 19 21 24 27 28 30 30 30 30

R31 40 40 40 40 40 40 40 40 40 41 17 19 21 24 26 28 30 30 30 30

R32 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 30 30 30 30

R33 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 28 30 30 30 30


Page 23


Wind Speed (m/s)

4 5 6 7 8 9 10 11 12 13 4 5 6 7 8 9 10 11 12 13

R34 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 30 30 30 30

R35 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 29 30 29 29

R36 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 30 29 29

R37 45 45 45 45 45 45 45 45 45 45 23 25 27 30 32 34 36 36 36 35

R38 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R39 40 40 40 40 40 40 40 40 40 41 15 16 18 21 23 25 27 27 27 27

R40 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 26 27 27 27

R41 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R42 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 29 29 29

R43 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 29 29 29

R44 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 28 29 30 30 29

R45 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R46 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R47 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 29 29 29

R48 40 40 40 40 40 40 40 40 40 41 12 14 16 18 21 23 25 25 25 25

R49 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R50 40 40 40 40 40 40 40 40 40 41 17 18 21 23 26 27 29 29 29 29

R51 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R52 40 40 40 40 40 40 40 40 40 41 17 18 20 23 26 27 29 29 29 29

R53 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 29 29 29 29

R54 40 40 40 40 40 40 40 40 40 41 13 14 16 19 21 23 25 25 25 25

R55 40 40 40 40 40 40 40 40 40 41 18 20 22 25 27 29 31 31 31 31

R56 40 40 40 40 40 40 40 40 40 41 16 17 20 22 25 26 28 28 28 28

R57 40 40 40 40 40 40 40 40 40 41 16 17 19 22 24 26 28 28 28 28

R58 40 40 40 40 40 40 40 40 40 41 12 14 16 18 21 23 25 25 25 25

R59 40 40 40 40 40 40 40 40 40 41 15 17 19 21 24 26 28 28 28 28

R60 40 40 40 40 40 40 40 40 40 41 16 17 19 22 24 26 28 28 28 28

R61 40 40 40 40 40 40 40 40 40 41 16 17 19 22 24 26 28 28 28 28

R62 40 40 40 40 40 40 40 40 40 41 21 23 25 27 30 31 33 33 33 33

R63 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 29 30 31 30 30

R64 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R65 40 40 40 40 40 40 40 40 40 41 14 15 17 20 22 24 26 26 26 26

R66 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 28 30 30 30 30

R67 40 40 40 40 40 40 40 40 40 41 18 19 21 24 27 28 30 30 30 30


Page 24


Wind Speed (m/s)

4 5 6 7 8 9 10 11 12 13 4 5 6 7 8 9 10 11 12 13

R68 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R69 40 40 40 40 40 40 40 40 40 41 13 15 17 19 22 24 26 26 26 26

R70 45 45 45 45 45 45 45 45 45 45 26 28 30 32 35 36 38 38 38 38

R71 45 45 45 45 45 45 45 45 45 45 25 26 28 31 34 35 37 37 37 37

R72 40 40 40 40 40 40 40 40 40 41 17 18 20 23 25 27 29 29 29 29

R73 40 40 40 40 40 40 40 40 40 41 14 15 17 20 22 24 26 26 26 26

R74 40 40 40 40 40 40 40 40 40 41 17 19 21 23 26 27 29 29 29 29

R75 40 40 40 40 40 40 40 41 43 44 21 22 24 27 29 31 33 33 33 32

R76 40 40 40 40 40 40 40 40 40 41 18 20 22 24 27 28 30 30 30 30

R77 40 40 40 40 40 40 40 40 40 41 21 22 25 27 30 31 33 33 33 33

R78 40 40 40 40 40 40 40 40 40 41 18 19 21 24 26 28 30 30 30 30

R79 40 40 40 40 40 40 40 40 40 41 16 18 20 22 25 27 28 29 28 28

R80 40 40 40 40 40 40 40 40 40 41 20 21 23 26 29 30 32 32 32 32

R81 40 40 40 40 40 40 40 40 40 41 15 16 18 21 24 25 27 27 27 27

R82 40 40 40 40 40 40 40 40 40 41 19 20 22 25 27 29 31 31 31 31

R83 40 40 40 40 40 40 40 40 40 41 17 18 20 22 25 27 29 29 29 29

R84 40 40 40 40 40 40 40 40 40 41 15 17 19 21 24 26 28 28 28 28

R85 40 40 40 40 40 40 40 40 40 41 15 17 19 21 24 26 28 28 28 28

R86 40 40 40 40 40 40 40 40 40 41 15 16 19 21 24 25 27 27 27 27

R87 40 40 40 40 40 40 40 40 40 41 15 16 18 21 24 25 27 27 27 27

R88 40 40 40 40 40 40 40 40 40 41 15 16 18 21 23 25 27 27 27 27

R89 40 40 40 40 40 40 40 40 40 41 15 16 18 21 23 25 27 27 27 27

R90 40 40 40 40 40 40 40 40 40 41 15 16 18 21 23 25 27 27 27 27

R91 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R92 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R93 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R94 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R95 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 27 27 27 27

R96 40 40 40 40 40 40 40 40 40 41 14 16 18 20 23 25 26 27 27 27


Page 25 Appendix F: Noise Contour

CHERRY TREE WIND FARM ENVIRONMENTAL NOISE … · Cherry Tree Wind Farm Environmental Noise...

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