to: paul carter, department of environment ......enclosure (2) 2 d ve g d d d e d h ce o d g t d d d...
TRANSCRIPT
MEMORANDUM
TO: PAUL CARTER, DEPARTMENT OF ENVIRONMENT AND CONSERVATION OF NEWFOUNDLAND AND LABRADOR
FROM: SHANT DOKOUZIAN, ENG.
SUBJECT: FERMEUSE WIND FARM – NOISE SIMULATIONS – REVISION 1
DATE: 2008-06-12
CC: JULIE TURGEON, ENG. - HELIMAX, CHARMAINE THOMPSON, SKYPOWER CORP.
This document provides an addition to the Environmental Assessment of the Fermeuse Wind Farm, submitted to federal and provincial agencies in March 2008. As requested, this document presents details on the noise simulation conducted for the Fermeuse Wind Farm Project and an additional noise simulation. Noise simulations are produced using industry standard software, such as WindFarmer in the case of Fermeuse. The software is based on the currently approved ISO 9613 standard. This standard provides a model for the calculation of the equivalent continuous A-weighted sound pressure level at a distance from one or more point sources under meteorological conditions favourable to propagation from sources of sound emission. These conditions are for downwind propagation and propagation under a well-developed moderate ground-based temperature inversion, such as commonly occurs at night. The method consists of octave-band algorithms (i.e. with nominal mid-band frequencies from 63 Hz to 8 kHz) for calculating the attenuation of the emitted sound. The algorithm takes into account the following physical effects:
• Geometrical divergence – attenuation due to spherical spreading from the sound source;
• Atmospheric absorption – attenuation due to absorption by the atmosphere;
• Ground effect – attenuation due to the acoustical properties of the ground.
ISO-9613 input parameters are ambient air temperature, ambient barometric pressure, humidity, source ground factor, middle ground factor, receptor ground factor, receptor height and wind turbine characteristics, amongst others. In addition to being internationally recognized, ISO 9613 is the calculation methodology strongly recommended by CanWEA (2007) and provinces such as Ontario (NPC-252) and Quebec (Instruction Note 98-01). This methodology was used in both simulations attached hereto. Differences between provincial jurisdictions mainly lie in the input parameters used for the simulations, namely the turbine characteristics and the recommended maximum noise levels at dwellings. In absence of provincial guidelines, the initial noise simulation produced by Helimax followed national best practices and was based on the worst case scenario principle by using the maximum noise output of the wind turbine, regardless of wind speed. This simulation is included in the Noise and Visual Analysis Study
Report presented to the DEC and to the Town of Fermeuse, last March. Initially, the Project was configured to comply with the Health Canada Wind Farm Fact Sheet (2006) which recommends that the simulated noise generated from wind turbines should not exceed 45 dBA outside dwellings. The noise isocontour map in the report showed clearly that no dwellings were within the 45 dBA limits. For illustrative purposes, we have attached the same map to this memo, but added the 40 dBA isocontour; the map shows that dwellings are also outside the 40 dBA limits. Once again, this represents a worst-case scenario, as the model considers the following:
• that turbines are spinning at maximum noise output; • the model takes into account the cumulative effect of all turbines; • the model assumes that the dwellings are always downwind from all turbines; • the model does not include any screening from vegetation.
The second simulation, and also attached hereto, follows CanWEA guidelines (2007) (as used in Ontario–NPC-252) which recommend using the noise output of the wind turbine when the wind speed is 6 m/s at a height of 10 m above ground level, whilst respecting 40 dBA at dwellings. Thus, the latter is somewhat less conservative as the wind turbines do not produce as much noise at 6 m/s, and the results are clearly illustrated in the attached map. In summary:
• The initial noise simulation was done as per ISO 9613 with the maximum sound power level (SPL) of the Vestas V90 turbine (109.4 dBA);
• The second noise simulation was done as per ISO 9613 with the sound power level (SPL) of the turbine at winds of 6 m/s (at 10m above ground level), equivalent to 106.0 dBA, as recommended in the CanWEA guidelines;
For both simulations, the results show that all permanent dwellings, which are located in the Town of Fermeuse, are below the limit of 40 dBA. Please feel free to contact us on the matter, if need may be. Best regards,
Shant Dokouzian, Eng. Wind Farm Specialist 4100, rue Molson, bureau 100 Montréal (Quebec) H1Y 3N1 Tel.: (514) 272-2175 ext. 234 Fax: (514) 272-0410 [email protected] Enclosure (2)
2
Martins Pond
Lumley Cove
Merry meetingPond
Riverhead Pond
Mulberry Pond
WobblePond
Litt le BoughPlace
Randy BooPond
BigButterpot
Bear Cove Pond
Big Pond Rock Pond
Firs t Pond
Paddy ReddysPond
Renews
Fermeuse
FerrylandAquaforte
Port Kirwan
10
10
10
98
76
5
4
32
1
Flat Rock
Aquaforte
Fermeuse
Kingman's
Port Kirwan
345000
345000
346000
346000
347000
347000
348000
348000
349000
349000
350000
350000
351000
351000
352000
352000
353000
353000
354000
354000
355000
355000
356000
356000
5200
000
5201
000
5201
000
5202
000
5202
000
5203
000
5203
000
5204
000
5204
000
5205
000
5205
000
5206
000
5206
000
5207
000
5207
000
5208
000
5208
000
53°2'24"W
53°1'48"W
53°1'48"W
53°1'12"W
53°1'12"W
53°0'36"W
53°0'36"W
53°0'0"W
53°0'0"W
52°59'24"W
52°59'24"W
52°58'48"W
52°58'48"W
52°58'12"W
52°58'12"W
52°57'36"W
52°57'36"W
52°57'0"W
52°57'0"W
52°56'24"W
52°56'24"W
52°55'48"W
52°55'48"W
52°55'12"W
52°55'12"W
52°54'36"W
52°54'36"W
52°54'0"W
52°54'0"W
52°53'24"W
52°53'24"W46
°56'
24"N
46°5
6'24
"N
46°5
7'0"
N
46°5
7'0"
N
46°5
7'36
"N
46°5
7'36
"N
46°5
8'12
"N
46°5
8'12
"N
46°5
8'48
"N
46°5
8'48
"N
46°5
9'24
"N
46°5
9'24
"N
47°0
'0"N
47°0
'0"N
47°0
'36"
N
47°0
'36"
N
0 0.5 10.25kilometres
Legend
Wind Turbine
Wind Monitoring Tower
Radiocommunication Tower
Building
Cabin
Cabin (Approximate Position)
Transformer Station
Transmission Line
Access Road
Road
Limited-use Road
ATV and Snowmobile Trail
Contour (interval: 10 m)
Watercourse
Mining Site
Peatland (Site Visit)
Municipality
Waterbody
Simulated Noise Level40 - 45 dB(A)
45 and More dB(A)
152-219-260508-0 1-CLA
May 26, 2008Projection: UTM Zone 22, NAD83
© Her Majesty the Queen in Right of Canada, Department o f Natural Resources.All rights reserved.
Geobase®
Sources: NTDB 1:50 000, Geobase and Envirotel 3000
PROJECT LAYOUT ANDNOISE ISO-CONTOURS(WIND TURBINES V90
AT MAXIMUM SPL - 109.4 dBA)
Fermeuse Wind Farm
Layout: L0 9-152FER(VW22901)-20080215 -SD00
Noise Analysis:ICB03-152Fermeuse-9ms-20080219-MS00
RenewsFermeuse
Ferryland
St. John's
Atlantic OceanNewfoundland
Martins Pond
Lumley Cove
Merry meetingPond
Riverhead Pond
Mulberry Pond
WobblePond
Litt le BoughPlace
Randy BooPond
BigButterpot
Bear Cove Pond
Big Pond Rock Pond
Firs t Pond
Paddy ReddysPond
Renews
Fermeuse
FerrylandAquaforte
Port Kirwan
10
10
10
98
76
5
4
32
1
Flat Rock
Aquaforte
Fermeuse
Kingman's
Port Kirwan
345000
345000
346000
346000
347000
347000
348000
348000
349000
349000
350000
350000
351000
351000
352000
352000
353000
353000
354000
354000
355000
355000
356000
356000
5200
000
5201
000
5201
000
5202
000
5202
000
5203
000
5203
000
5204
000
5204
000
5205
000
5205
000
5206
000
5206
000
5207
000
5207
000
5208
000
5208
000
53°2'24"W
53°1'48"W
53°1'48"W
53°1'12"W
53°1'12"W
53°0'36"W
53°0'36"W
53°0'0"W
53°0'0"W
52°59'24"W
52°59'24"W
52°58'48"W
52°58'48"W
52°58'12"W
52°58'12"W
52°57'36"W
52°57'36"W
52°57'0"W
52°57'0"W
52°56'24"W
52°56'24"W
52°55'48"W
52°55'48"W
52°55'12"W
52°55'12"W
52°54'36"W
52°54'36"W
52°54'0"W
52°54'0"W
52°53'24"W
52°53'24"W46
°56'
24"N
46°5
6'24
"N
46°5
7'0"
N
46°5
7'0"
N
46°5
7'36
"N
46°5
7'36
"N
46°5
8'12
"N
46°5
8'12
"N
46°5
8'48
"N
46°5
8'48
"N
46°5
9'24
"N
46°5
9'24
"N
47°0
'0"N
47°0
'0"N
47°0
'36"
N
47°0
'36"
N
0 0.5 10.25kilometres
Legend
Wind Turbine
Wind Monitoring Tower
Radiocommunication Tower
Building
Cabin
Cabin (Approximate Position)
Transformer Station
Transmission Line
Access Road
Road
Limited-use Road
ATV and Snowmobile Trail
Contour (interval: 10 m)
Watercourse
Mining Site
Peatland (Site Visit)
Municipality
Waterbody
Simulated Noise Level35 - 40 dB(A)
40 - 45 dB(A)
152-220-260508-0 1-CLA
May 26, 2008Projection: UTM Zone 22, NAD83
© Her Majesty the Queen in Right of Canada, Department o f Natural Resources.All rights reserved.
Geobase®
Sources: NTDB 1:50 000, Geobase and Envirotel 3000
PROJECT LAYOUT ANDNOISE ISOCONTOURS -
WIND TURBINES V90 AT SPL = 106.0 dBA
(for wind speed of 6 m/s at 10 m agl)
Fermeuse Wind Farm
Layout: L0 9-152FER(VW22901)-20080215 -SD00
Noise Analysis:CB152Fermeuse-6ms-20080 523-SD00
RenewsFermeuse
Ferryland
St. John's
Atlantic OceanNewfoundland