st. columban wind project - veresen · regional roads. for the purposes of this report, all project...

Zephyr North Ltd.

850 LEGION ROAD UNIT 20BURLINGTON ON L7S 1T5CANADA

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ST. COLUMBAN WIND PROJECT

TRANSFORMER NOISE ASSESSMENT

REPORTRevision 0

For

By

J. R. SalmonS. J. Corby

2012 August 10

J. Menéndez, P.Eng.For St. Columban Energy LP

ST. COLUMBAN WIND PROJECT— Transformer Noise Assessment Report Revision 0

2

DISCLAIMER OF WARRANTIESAND

LIMITATION OF LIABILITIES

This Report was prepared by Zephyr North Ltd. of Burlington Ontario Canada as an account of work sponsored by St. Columban Energy LP (St. Columban). Neither Zephyr North Ltd. nor any person acting on its behalf:(a) Makes any warranty or representation whatsoever,

express or implied, (i) with respect to the use of any information, apparatus, method, process, or similar item disclosed in this report, including merchantability and fitness for a particular purpose, or (ii) that such use does not infringe on or interfere with privately owned rights, including any party's intellectual property, or (iii) that this report is suitable to any particular user's circumstance, or

(b) Assumes responsibility for any damages or other liability whatsoever (including any consequential damages, even if Zephyr North Ltd. or its representatives have been advised of the possibility of such damages) resulting from your selection or use of this report or any information, apparatus, method, process or similar item disclosed in this report.


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Table of Contents 1 INTRODUCTION...................................................................................6

1.1 Purpose............................................................................................6 1.2 Revision 0........................................................................................6 1.3 Brief Project Description................................................................6 1.4 Reporting Details............................................................................7 1.5 Sound Level Limits for Wind Farms..............................................7

2 PROJECT LAYOUT...............................................................................8 2.1 Project Site......................................................................................8 2.2 Project Details — Turbines............................................................8 2.3 Municipal Zoning..........................................................................10 2.4 Adjacent Projects..........................................................................10 2.5 Substations...................................................................................10

2.5.1 St. Columban Wind Project...................................................10 3 DESCRIPTION OF RECEPTORS.......................................................11

3.1 Definition......................................................................................11 3.2 Determination of Receptors and Participants.............................11 3.3 Vacant Lots...................................................................................11 3.4 Methodology..................................................................................12 3.5 Concordance Table........................................................................12

4 DESCRIPTION OF SOURCES............................................................13 4.1 Wind Turbines..............................................................................13

4.1.1 St. Columban Wind Project...................................................13 4.2 Sub-Stations..................................................................................13

4.2.1 St. Columban Wind Project...................................................13 4.2.1.1 Transformer...................................................................13

5 NOISE EMISSION RATINGS.............................................................14 5.1 Wind Turbines..............................................................................14


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5.1.1 Turbine Noise Definition Standard......................................14 5.1.2 St. Columban Wind Project...................................................14

5.2 Site-Specific Vertical Wind Shear Exponent...............................14 5.3 Sub-Stations..................................................................................14

5.3.1 St. Columban Wind Project...................................................14 6 IMPACT ASSESSMENT......................................................................16

6.1 Methodology..................................................................................16 6.2 Specific Parameters......................................................................16 6.3 Additional parameters and conditions.........................................17 6.4 Results...........................................................................................17

7 NOISE LEVEL SUMMARY TABLES.................................................18 8 NOISE LEVEL ISOPLETH MAP........................................................19 9 EXAMPLE CALCULATION................................................................21

9.1 Method of Calculation...................................................................21 9.2 Example........................................................................................22

10 CONCLUSIONS.................................................................................24 11 REFERENCES...................................................................................25 12 APPENDIX A — TURBINE, RECEPTOR, VACANT LOT AND PARTICIPANT LOCATIONS................................27 13 APPENDIX B — ADDITIONAL DOCUMENTATION.....................29


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List of FiguresFigure 1-1 Project location map.................................................................6Figure 2-1 Transformer sub-station details map......................................9Figure 8-1 40 dBA noise isopleth map for 6 ms-1 (10 m) for 1.5 and 4.5 m

receptor heights.......................................................................20

List of TablesTable 5-1 Project transformer station acoustic emissions summary......15Table 6-1 Sorted highest noise levels at receptors..................................17Table 7-1 Receptor noise level summary table........................................18Table 7-2 Participant noise level summary table....................................18Table 9-1 Sample calculation for receptor and turbine...........................23Table 9-2 Sample calculation for single receptor R2011 and transformer

Tr100...........................................................................................23


1 INTRODUCTION

1.1 PurposeThis Noise Assessment Report (NAR) describes the results of a noise impact assessment for the transformer sub-station associated with the St. Columban Energy LP (St. Columban) proposed St. Columban Wind Project. The transformer sub-station is located approximately 35 km north-northeast of the project turbines. Separate reports (Zephyr North, 2012a, 2012b, 2012c, 2012d) describe noise assessment of the project turbines.

1.2 Revision 0This revision (Revision 0) is the original Transformer Noise Assessment Report.

1.3 Brief Project DescriptionThe St. Columban Wind Project consists of two Ontario Feed-In Tariff (FIT) wind energy projects with two distinct points of connection into the local distribution grid, and a remote transformer sub-station. The two projects and the transformer sub-station are referred to herein and collectively as the St. Columban Wind Project.The turbines are sited in the Municipality of Huron East in Huron County. They are located in two wind farm clusters — one consisting of 8 turbines for a capacity of approximately 17 to 18 MW, and another consisting of 7 turbines for a capacity of approximately 15 MW.The project power transformer sub-station is located approximately 35 km north-northeast of the project turbines in the Township of Howick. A transmission line running through the Municipality of Huron East, the Municipality of

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Figure 1-1 Project location map.


Morris-Turnberry, and the Township of Howick links the turbine site to the transformer sub-station.Figure 1-1 shows the location of the project within Ontario.

1.4 Reporting DetailsThis report has been prepared to meet all reporting requirements related to wind project noise for a Renewable Energy Approval (REA) under the Green Energy and Green Economy Act 2009 (Government of Ontario, 2009)A noise impact assessment was carried out for this project under Section 55.(3) of O. Reg 359/09 (Government of Ontario, 2009b) and amendments (O.Reg. 521/10, Government of Ontario, 2010; O.Reg. 231/11, Government of Ontario, 2011). The assessment methodology and calculations conform to the ISO 9613-2 International Standard (ISO, 1996). Results of the analysis have been interpreted using Ministry of Environment Guidelines (MoE, 2008). This latter document generally provides guidelines, clarifications and additional requirements for the application of MoE regulations document NPC-232 (MoE, 1995) to wind farm projects.This report will show that the estimated noise levels generated by the project power transformer meet the MoE (2008) prescribed limits at all qualified receptors.

1.5 Sound Level Limits for Wind FarmsMoE (2008) lists the sound level limits for wind farms (based on the NPC-205 (MoE, 1995a) and NPC-232 (MoE, 1995b) publications and a consideration of the background ambient wind-induced sound level) as follows. Note that noise contributions from other project hardware, such as switching stations, transformer sub-stations, etc., must be included in the cumulative noise assessment.

Summary of Sound Level Limits for Wind Turbines

Wind speed (ms-1) at 10 m height 4 5 6 7 8 9 10

Wind turbine sound level limits Class 3 Area, dBA 40.0 40.0 40.0 43.0 45.0 49.0 51.0

Wind turbine sound level limits Class 1 Area, dBA 45.0 45.0 45.0 45.0 45.0 49.0 51.0

Reference wind induced background sound level L90, dBA 30.0 31.0 33.0 36.0 38.0 42.0 44.0

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2 PROJECT LAYOUT

2.1 Project SiteThe St. Columban Wind Project power transformer sub-station is located in the Township of Howick in Huron County. Transformer site details along with typical topographic map features are included in Figure 2-1 which shows the project area surrounding the power transformer.Within the project power transformer domain, the topography can be characterized as very gently rolling to the point of being almost flat. In Figure 2-1, the contour lines (5 m contour interval) confirm this. Note that the topographic elevation in the vicinity of the transformer sub-station is about 345 m above sea level (a.s.l).The surface roughness of the project domain is typical of Ontario rural terrain with a heterogeneous mixture of agricultural fields, woodlots, farm buildings, dwellings, rural settlements, and small villages and towns.The primary activity in this area is agriculture.The St. Columban Wind Project power transformer sub-station site features a population density typical of southern Ontario rural communities — a relatively sparse population in the countryside except for a small number of settlement clusters (villages and towns). The hamlet of Wroxeter is located about 1.7 km to the north-northeast of the transformer site.

2.2 Project Details — TurbinesSince the project turbines are located some 35 km to the south-southwest of the power transformer under consideration in this report, they will not be described here. A full description can be found in Zephyr North (2012a, 2012b, 2012c, 2012d).

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Figure 2-1 Transformer sub-station details map.


2.3 Municipal ZoningTypically, the project area is zoned as Agricultural.

2.4 Adjacent ProjectsSt. Columban Energy LP (St. Columban) has stated that it is not aware of any other planned wind energy projects nor transformer sub-stations in the vicinity of the presently described sub-station.

2.5 Substations

2.5.1 St. Columban Wind ProjectThe St. Columban Wind Project turbines are connected into the low voltage electrical distribution system at two different points. In the case of the St Columban 1 wind farm (~17 MW capacity), an approximately 43 km buried interconnection line will link the project to a single transformer located on a project property situated about 35 km north-northeast of the turbines, and about 1.7 km south-southwest of the hamlet of Wroxeter. This 15/20 MVA step-up transformer will operate at 44 kV/34.5 kV.Figure 2-1 shows the prospective transformer, point of reception (receptor), and participating point of reception (participant) locations. The transformer is designated with the prefix ‘Tr’, receptors are designated with ‘R’, and participants with ‘P’.The project transformer substation is located within an agricultural field. It will occupy approximately 0.06 ha (~20 m x 30 m). An access road will run from the adjacent highway (McDonald Line) to the sub-station. The latter will be surrounded by a security fence, but not a noise barrier as the latter is not required to achieve noise compliance.The Ontario NPC designation for the project property would be Class 3 — Rural. Typical background sound levels for this area would be generated by residential and agricultural activities, ambient sound from wind, and vehicle noise from regional roads. For the purposes of this report, all project areas have been considered to be NPC Class 3.As specified by O.Reg 359/09, the St. Columban Wind Project (including its power transformer) is a Class 4 Wind Project.

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3 DESCRIPTION OF RECEPTORS

3.1 DefinitionReceptors (non-participating points of reception), vacant lot surrogate receptors (VLSRs), and participants (participating points of reception) are defined in Ontario MoE NPC-232 (MoE, 1995b) and Noise Guidelines publication (MoE, 2008), and in Ontario O.Reg. 359-09 and amendments (Government of Ontario; 2009b, 2010, 2011).

3.2 Determination of Receptors and ParticipantsReceptors and participants appropriate to the present noise assessment were identified through mapping and aerial photographs of the power transformer portion of the project area. For verification of details, on-site surveys were carried out. All known receptors and participants within 1,000 m of the project transformer were identified.Typically, for the project area, receptors are residential dwellings of individuals and families not associated with the project. Section 12 (Appendix A) lists limited details for all known receptors and participants situated within the project area. Their locations are shown in Figure 2-1. All receptors within 1,000 m of the project transformer have been included and reported in this noise impact analysis. All receptors have been considered to be designated as rural (NPC Class 3).For the purposes of noise assessment, participants have been defined as dwellings occupied by landowners who receive financial compensation for the placement of project hardware (turbines, cables, roads, transformers, etc.) on their properties.For this project, 7 receptors (non-participating points of reception) and 1 participant (participating point of reception) were determined to be within 1,000 m of the project transformer.

3.3 Vacant LotsThe MoE (2008) Guidelines document also requires prediction of the noise levels on “...vacant lots that have been zoned by the local municipality to permit residential or similar noise-sensitive uses...”. However, for the present assessment, the 40 dBA

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isopleths (for 1 and 2 storey dwellings) are confined entirely within the property to the north and and the property to the south (see Figure 8-1). Both of these properties contain dwellings — a participant dwelling to the north and a receptor dwelling to the south. There are no other properties that can be impacted by the transformer with noise levels greater than 40 dBA. As a consequence of this, no vacant lots were designated, and no vacant lot surrogate receptors (VLSRs) were assigned.

3.4 MethodologyISO 9613-2 modelling was carried out for all receptors and participants.A calculated receptor sound pressure level for each receptor was determined as stipulated in Section 6.3.2 of MoE (2008) as the present calculations apply only to the project transformer.The heights of dwellings designated as 1-, 2-, and 3-storeys were set to be 1.5, 4.5, and 7.5 m respectively.As noted above, a participating receptor (referred to herein as a participant) has also been surveyed and is shown in Figure 2-1 and listed in Section 12 (Appendix A). An estimate of the sound pressure level was also made for this participant location.It should be noted that the receptors and participant listed in Section 12 include only those that are closer than or equal to 1,000 m from the project transformer noise source.

3.5 Concordance TableSince there are no existing or proposed neighbouring wind energy projects (including transformer sub-stations), “concordance tables” that rationalize the identification of receptors and VLSRs between the subject and neighbouring projects have not been included.

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4 DESCRIPTION OF SOURCES

4.1 Wind Turbines

4.1.1 St. Columban Wind ProjectSince the project turbines are located some 35 km to the south-southwest of the power transformer sub-station under consideration in this report, they will not be described nor considered here. Should the reader require turbine information, full descriptions can be found in Zephyr North (2012a, 2012b, 2012c, 2012d).

4.2 Sub-Stations

4.2.1 St. Columban Wind ProjectAs noted previously, the off-site project sub-station transformer considered in this report is located about 35 km to the north-northeast of the project turbines.

4.2.1.1 Transformer

The following table describes the single sub-station power transformer.

Sub-Station Wind Farm Transformer

Type AC power transformer; details to be finalized

Operating voltages 44kV output / 34.5kV inputRating ~18 MVAHeight to be determinedCore tank size to be determinedSource location outsideSound characteristics steady, tonalNoise control measures none

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5 NOISE EMISSION RATINGS

5.1 Wind Turbines

5.1.1 Turbine Noise Definition StandardAs noted previously, since the project turbines are located some 35 km to the south-southwest of the power transformer under consideration in this report, they will not be considered here and, as a consequence the turbine noise definition Standard is not relevant to this report. If required, a description of the Standard can be found in Zephyr North (2012a, 2012b).

5.1.2 St. Columban Wind ProjectAs noted previously, since the project turbines are located some 35 km to the south-southwest of the power transformer under consideration in this report, they will not be considered here.

5.2 Site-Specific Vertical Wind Shear ExponentAs no turbines are under consideration in this noise assessment report, the site-specific vertical wind shear exponent is not relevant here.

5.3 Sub-Stations

5.3.1 St. Columban Wind ProjectBecause it is not fiscally prudent to purchase or even to order a large power transformer such as required for this project before receiving confirmation that the project will be permitted to proceed, only limited information is available for the transformer and its source noise.While the specific transformer model has not yet been determined for the project, it has been specified that the broadband source sound power level for the transformer should not exceed 72.0 dBA. This value has been determined from the CAN/CSA C88-M90 Standard (CAN/CSA, 2011a) for transformers with 44 kV and 20 MVA ratings.

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For the purposes of this report, octave band source sound power levels characteristic of a typical power transformer were adjusted to reflect the maximum 72.0 dBA broadband level. These are listed in Table5-1 along with a 5 dB tonal penalty assessed to all frequencies. The net octave band source sound power levels are also shown, as is the resulting broadband source sound power levels before and after assessment of the penalties.Note that the tonal penalties have been applied for all calculations in this report.No attenuation due to acoustic barriers has been included in the present calculations.St. Columban Energy LP (St. Columban) has undertaken to provide full transformer and substation details as soon as they become available.

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Table 5-1 Project transformer station acoustic emissions summary.

Operating voltage: 44kV output; 34.5kV input

Core tank size: To be finalizedSource height (m): 4.0 (to be finalized)Source location: outsideSound characteristics: steady, tonalNoise control measures: uncontrolled

63 50.5 5.0 55.5125 62.6 5.0 67.6250 65.1 5.0 70.1500 70.5 5.0 75.5

1000 67.7 5.0 72.72000 63.9 5.0 68.94000 58.7 5.0 63.78000 49.6 5.0 54.6

72.0 77.0

Make and Model: AC power transformer; details to be finalized

Rating: ~18 MVA

Frequency (Hz)

Source sound

power level (dBLin)

Tonal penalty

(dB)

Net source sound power level

(dBLin)

Broadband (dBA)


6 IMPACT ASSESSMENT

6.1 MethodologyCumulative transformer sound pressure levels were estimated at each of the receptors using the ISO 9613-2 Standard (ISO, 1996). Transformer octave band and A-weighted sound power values, standardized meteorological conditions, transformer location, receptor/participant locations, and characteristics were used to determine the A-weighted sound pressure levels at all receptors.

6.2 Specific Parametersa)

Analysis was carried out for transformer source sound power levels in eight octave bands (63 to 8,000 Hz) corresponding to 10 m (a.g.l.) ambient wind speeds of 6, 7, 8, 9, and 10 ms-1.

b)

ISO 9613-2 parameters, as prescribed in the MoE (2008) Noise Guidelines were set as follows:

Ambient air temperature: 10 CAmbient humidity: 70 %

The required atmospheric attenuation coefficients to be used in the ISO 9613-2 modelling of noise propagation are prescribed in MoE (2008). These have been used in the present assessment, and are shown in the following table.

Atmospheric Absorption Coefficients

Centre Octave Band Frequency (Hz) 63 125 250 500 1000 2000 4000 8000

Atmospheric Absorption Coefficient (dB/km) from MoE Oct 2008 document

0.1 0.4 1.0 1.9 3.7 9.7 32.8 117.0

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c)

The ISO 9613-2 term for Ground Attenuation was calculated using the “General” Method (Section 7.3.1 of the ISO 9613-2 Standard). Ground factors were assigned the following values as required by the MoE (2008) Guidelines.

Source ground factor: 1.0 (soft ground)Middle ground factor: 0.8 (soft ground)Receptor ground factor: 0.5 (hard/soft ground)

6.3 Additional parameters and conditionsSound pressure levels were not calculated for any receptor further than 1,000 m from the project transformer.No additional adjustments were made for wind speed or direction since ISO 9613-2 assumes worst-case conditions for these parameters with respect to noise impact.

6.4 ResultsResults are reported in Tables 7-1 and 7-2 found in Section 7 and the noise level isopleth map of Section 8 (Figure 8-1).Table 6-1 briefly summarizes the results of the noise assessment. It is a sorted list of the highest sound pressure levels determined in the analysis for receptors.

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Table 6-1 Sorted highest noise levels at receptors.

Receptor IDSPrL (dBA)

Height (m)

Nearest Noise

Source

Project or Other Noise

Source

Distance (m)

R2011 23.4 4.5 Tr100 P 151

R2009 13.4 4.5 Tr100 P 386

R2008 11.8 4.5 Tr100 P 456

R2013 9.9 4.5 Tr100 P 549

R2014 7.5 4.5 Tr100 P 686

R2007 4.5 4.5 Tr100 P 899

R2023 3.7 4.5 Tr100 P 968

WindFarm layout file: StC05-WFL049.WFL


7 NOISE LEVEL SUMMARY TABLES

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Table 7-1 Receptor noise level summary table.

Point of Reception

IDDescription

Height (m)

Distance to Nearest Project

Turbine/ Transformer (m)

Nearest Project Turbine/

Transformer

Calculated Sound Level at Selected Wind Speeds (dBA)

Sound Level Limit (dBA)

6.0 7.0 8.0 9.0 10.0 6.0 7.0 8.0 9.0 10.0

R2007 Residence 4.5 899 Tr100 4.5 4.5 4.5 4.5 4.5 40.0 43.0 45.0 49.0 51.0

R2008 Residence 4.5 456 Tr100 11.8 11.8 11.8 11.8 11.8 40.0 43.0 45.0 49.0 51.0

R2009 Residence 4.5 386 Tr100 13.4 13.4 13.4 13.4 13.4 40.0 43.0 45.0 49.0 51.0

R2011 Residence 4.5 151 Tr100 23.4 23.4 23.4 23.4 23.4 40.0 43.0 45.0 49.0 51.0

R2013 Residence 4.5 549 Tr100 9.9 9.9 9.9 9.9 9.9 40.0 43.0 45.0 49.0 51.0

R2014 Residence 4.5 686 Tr100 7.5 7.5 7.5 7.5 7.5 40.0 43.0 45.0 49.0 51.0

R2023 Residence 4.5 968 Tr100 3.7 3.7 3.7 3.7 3.7 40.0 43.0 45.0 49.0 51.0

Table 7-2 Participant noise level summary table.

Point of Reception ID

Description Height (m)

Distance to Nearest Project

Turbine/ Transformer (m)

Nearest Project Turbine/

Transformer

Calculated Sound Level at Selected Wind Speeds (dBA)

6.0 7.0 8.0 9.0 10.0

P2010 Residence 1.5 223 Tr100 19.0 19.0 19.0 19.0 19.0


8 NOISE LEVEL ISOPLETH MAP

Figure 8-1 is a 40 dBA isopleth map of the sound pressure levels (dBA) due to the project transformer over the project area. The noise levels are calculated for receptors with 1.5 m (1 storey) and 4.5 m (2 storeys) heights.

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Figure 8-1 40 dBA noise isopleth map for 6 ms-1 (10 m) for 1.5 and 4.5 m receptor heights.


9 EXAMPLE CALCULATION

9.1 Method of CalculationThe calculation of cumulative receptor noise levels from turbines and transformers uses the methodology of ISO 9613-2, ‘Acoustics — Attenuation of sound during propagation outdoors: Part 2: General method of calculation’ (ISO, 1996).The calculation is based on equation (5) from ISO 9613-2, shown here:

whereLAT (DW) is the equivalent continuous A-weighted downwind sound pressure level at a receptor location,n is the number of turbines/transformers,Af (j) is the standard A-weighting for octave band j,j is an index indicating the eight standard octave-band mid-band frequencies from 63 Hz to 8 kHz,LfT(ij) ≡ LfT(DW) is the equivalent continuous downwind octave-band sound pressure level at a receptor location for turbine/transformer i and octave band j, and is given by

whereLW is the octave-band sound power level, in decibels, produced by the point sound source relative to a reference sound power of one picowatt,DC is the directivity correction in decibels,A is the octave-band attenuation, in decibels, that occurs during propagation from the turbine/transformer to receptor, and is given by

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LAT DW =10 log10{∑i=1n [∑j=1

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100.1[L fT ij A f j]]}

L ft DW =LWDC−A


whereAdiv is the attenuation due to geometrical divergence,Aatm is the attenuation due to atmospheric absorption,Agr is the attenuation due to the ground effect,Abar is the attenuation due to a barrier,Amisc is the attenuation due to miscellaneous other effects,Aatm is given by

whereα is the atmospheric attenuation coefficient, in decibels per kilometre, for each octave band at the midband frequency,d is the distance from the turbine/transformer to the receptor.Note that Abar and Amisc are not used here.

9.2 ExampleThe following sample calculation presents intermediate octave-band results of calculations for A-weighted sound pressure levels corresponding to a 10 m (a.g.l.) wind speed of 6 ms-1. All model parameters are the same as previously tabulated.Table 9-1 lists the intermediate sound pressure levels calculated at receptor R2011 due to the single transformer Tr100. Receptor and turbine are separated by 151 m.

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A=AdivAatmAgrAbarAmisc

A= d1000


In the table:LW is the octave-band sound power level, in decibels (A-weighted), produced by the point sound source relative to a reference sound power of one picowatt,Adiv is the attenuation due to geometrical divergence,Aatm is the attenuation due to atmospheric absorption,Agr is the attenuation due to the ground effect,LfT(DW) is the equivalent continuous downwind octave-band sound pressure level.

Table 9-2 shows intermediate octave band values of the calculations for the A-weighted sound pressure levels at receptor R2011 due to the single transformer Tr100.

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Table 9-1 Sample calculation for receptor and turbine.

Intermediate calculations for receptor R2011 and transformer Tr100

1 63 29.3 52.7 0.0 -3.0 -20.42 125 51.5 52.7 0.0 2.1 -3.43 250 61.5 52.7 0.1 4.3 4.44 500 72.3 52.7 0.2 1.5 17.85 1000 72.7 52.7 0.5 -0.4 20.06 2000 70.1 52.7 1.2 -0.8 17.07 4000 64.7 52.7 4.0 -0.8 8.78 8000 53.5 52.7 14.2 -0.8 -12.7

Octave band

Mid-band frequency

(Hz) LW (dBA) A

div (dB) A

atm (dB) A

gr (dB)

LfT(DW)

(dBA)

Table 9-2 Sample calculation for single receptor R2011 and transformer Tr100.

Intermediate calculations for single receptor R2011 and multiple turbines/transformers

63 125 250 500 1000 2000 4000 8000Tr100 151 5.8 12.7 13.0 21.0 20.0 15.8 7.7 -11.6 23.4

Turbine/ Transformer

IDDistance

(m)

Turbine/Transformer Lft contribution (dB) in frequency band (Hz) Turbine/

Transformer LAT

(dBA)


10 CONCLUSIONS

This noise impact assessment for the proposed St. Columban Wind Project transformer sub-station has determined that the estimated sound pressure levels at receptors in the project area comply with the Ministry of the Environment sound level limits at all qualified points of reception.

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11 REFERENCES

CAN/CSA, 2011a: Power Transformer and Reactor Bushings, CAN/CSA-C88.1-96 Standard, Published 1996, Reaffirmed 2011. Canadian Standards Association.

CAN/CSA, 2011b: Three-Phase Pad-Mounted Distribution Transformers with Separable Insulated High-Voltage Connectors, CAN/CSA-C227.4-06 Standard, Published 2006, Reaffirmed 2011. Canadian Standards Association.

Government of Ontario, 1990: Environmental Assessment Act, R.S.O. 1990, Chapter E.18. http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_90e18_e.htm

Government of Ontario, 1990: Environmental Protection Act, R.S.O. 1990, Chapter E.19. http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_90e19_e.htm

Government of Ontario, 2009: Green Energy Act, 2009, http://www.search.e-laws.gov.on.ca/en/isysquery/abaf99f7-8e6f-4ea9-b8a4-d6d8b0435bac/1/doc/?search=browseStatutes&context=#BK7

Government of Ontario, 2009b: Ontario Regulation 359/09, made under the Environmental Protection Act, Renewable Energy Approvals under Part V.0.1 of the Act. http://www.search.e-laws.gov.on.ca/en/isysquery/e366a7f1-5b0c-4468-b87d-479b33d386b4/1/frame/?search=browseStatutes&context=

Government of Ontario, 2010: O.Reg. 521/10 made under the Environmental Protection Act amending O.Reg. 359/09. http://www.e-laws.gov.on.ca/html/source/regs/english/2010/elaws_src_regs_r10521_e.htm

Government of Ontario, 2011, O.Reg. 231/11 made under the Environmental Protection Act amending O.Reg. 359/09.

IEEE, 2010: IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers, ANSI/IEEE C57.12.90-2010.

International Electrotechnical Commission (IEC), 2002: International Standard, Wind turbine generator systems – Part 11: Acoustic noise measurement techniques. Second edition 2002-12. http://webstore.iec.ch/preview/info_iec61400-11%7Bed2.0%7Den.pdf

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http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_90e19_e.htm


International Standards Organization (ISO), 1993: 9613-1 International Standard: Acoustics — Attenuation of sound during propagation outdoors — Part 1: Calculation of the absorption of sound by the atmosphere. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=17426

International Standards Organization (ISO), 1996: 9613-2 International Standard: Acoustics — Attenuation of sound during propagation outdoors — Part 2: General method of calculation. http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=20649

Ontario Ministry of the Environment (MoE), Date unknown: Sound Level Adjustments, Publication NPC-104. http://www.ene.gov.on.ca/stdprodconsume/groups/lr/@ene/@resources/documents/resource/std01_079360.pdf

Ontario Ministry of the Environment (MoE), 1995a: Sound Level Limits for Stationary Sources in Class 1 & 2 Areas (Urban), Publication NPC-205. October 1995. http://www.ene.gov.on.ca/stdprodconsume/groups/lr/@ene/@resources/documents/resource/std01_079360.pdf

Ontario Ministry of the Environment (MoE), 1995b: Sound Level Limits for Stationary Sources in Class 3 Areas (Rural), Publication NPC-232. October 1995. http://www.ene.gov.on.ca/envision/gp/3405e.pdf

Ontario Ministry of the Environment (MoE), 2008: MoE Noise Guidelines for Wind Farms; Interpretation for Applying MOE NPC Publications to Wind Power Generation Facilities (October 2008). http://www.ene.gov.on.ca/publications/4709e.pdf. 20 pp.

Zephyr North, 2012a: St. Columban Wind Project, Noise Assessment Report, Revision 5-101. Dated: 2012/06/12. By Zephyr North Ltd. – [email protected].

Zephyr North, 2012b: St. Columban Wind Project, Noise Assessment Report, Revision 5-113. Dated: 2012/06/12. By Zephyr North Ltd. – [email protected].

Zephyr North, 2012c: St. Columban Wind Project, Noise Assessment Report, Revision 5-101 Addendum 1. Dated: 2012/07/09. By Zephyr North Ltd. – [email protected].

Zephyr North, 2012d: St. Columban Wind Project, Noise Assessment Report, Revision 5-113 Addendum 1. Dated: 2012/07/09. By Zephyr North Ltd. – [email protected].

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12 APPENDIX A — TURBINE, RECEPTOR, VACANT LOT AND PARTICIPANT LOCATIONS

This appendix contains lists of transformer, receptor, and participant locations. Coordinates are given in the Universal Transverse Mercator (UTM) Zone 17N projection. The datum is North American Datum 1983 (NAD83, Canada).For reference, the project (turbine/transformer) layout identifier is StC05-WFL049.wfl.

TransformerTable: Transformer Location

Project Name: St. Columban Wind Project (Transformer NAR)Datum: NAD83 (Canada) Projection: UTM 17N

Equipment Identifier Make and Model X(E,m) Y(N,m) Transformer To be determined 487630 4854885

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Points of Reception (Receptors)Table - Point of Reception Locations


Point of Reception Height NPC ID Description (m) Class X(E,m) Y(N,m) R2007 Residence 4.5 3 488384 4855375 R2008 Residence 4.5 3 487553 4855334 R2009 Residence 4.5 3 487453 4855228 R2011 Residence 4.5 3 487678 4854742 R2013 Residence 4.5 3 487448 4854367 R2014 Residence 4.5 3 488099 4854385 R2023 Residence 4.5 3 487292 4855792

Participating Receptors (Participants)

Table: Participating Receptor Locations


Point of Reception Height NPC ID Description (m) Class X(E,m) Y(N,m) P2010 Residence 1.5 3 487682 4855102

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13 APPENDIX B — ADDITIONAL DOCUMENTATION

There is no additional documentation associated with this noise assessment report at this time.

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END

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