Big Thunder Wind Park, Draft Environmental Noise Impact Report

Transcription

1 May 4, 2011 Nhung Nguyen Horizon Wind Inc. Attention: Reference: Ms. Nhung Nguyen Big Thunder Wind Park, Draft Environmental Noise Impact Report Dear Ms. Nguyen, We are pleased to present a draft copy of the Environmental Noise Impact Report for the Big Thunder Wind Park. This report provides the noise results and conclusions for the R13.E82.H98.18 (1.3.7) turbine layout, excluding turbines 10 and 11, which were recently removed from the design. This report contains eight sections that describe the site, the methodology, interpretation of results, and conclusions. Four appendices are included which outline land use data, noise calculations, and turbine noise specifications. The modeling performed incorporated a 1.5 db(a) safety factor applied on top of the maximum sound power level guaranteed by the wind turbine manufacturer. The manufacturer recommends a 1 db(a) safety factor to account for potential measurement error. No noise report is required as part of the Renewable Energy Approvals process for this project, since the minimum separation distance between any Big Thunder turbine and point of reception exceeds 850 m (O. Reg. 359/09 Section 55). This report was prepared despite this, as requested by Horizon Wind Inc. Although it is not required, it is planned that this report will be included in the eventual Renewable Energy Approval Application submission to the Ministry of the Environment. It is concluded that the Big Thunder Wind Park turbines will have acceptably low noise impacts on the surrounding residences to meet Ministry of the Environment requirements. Sincerely, M. K. INCE AND ASSOCIATES LTD. Martin Ince, P. Eng.

2 Big Thunder Wind Park DRAFT Environmental Noise Impact Report Prepared by: M.K. Ince and Associates Ltd. May 4, 2011

3 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report TABLE OF CONTENTS 1 INTRODUCTION GENERAL DESCRIPTION OF PROJECT SITE AND SURROUNDINGS WIND PARK LOCATION ZONING POINTS OF RECEPTION (POR) TOPOGRAPHY DESCRIPTION OF RECEPTORS BIG THUNDER WIND PARK MODELED NOISE RECEPTORS Nearby Residences and Vacant Lots Loch Lomond Ski Area BIG THUNDER WIND PARK NOISE LIMIT CLASSIFICATIONS RECEPTOR AND CALCULATION ASSUMPTIONS DESCRIPTION OF SOURCES WIND TURBINE DESCRIPTION WIND FARM LAYOUT WIND TURBINE NOISE EMISSION RATING TONALITY IMPULSIVITY OCTAVE BAND DATA TRANSFORMER NOISE IMPACT ASSESSMENT CALCULATED NOISE LEVELS MITIGATION MEASURES CUMULATIVE IMPACTS CONCLUSIONS AND RECOMMENDATIONS QUALIFICATIONS AND LIMITATIONS LIST OF TABLES TABLE 1: POINT OF RECEPTION DESCRIPTIONS AND LOCATIONS... 6 TABLE 2: WIND TURBINE LOCATIONS TABLE 3: WIND TURBINE ACOUSTIC EMISSIONS SUMMARY TABLE 4: WIND TURBINE NOISE IMPACT SUMMARY LIST OF FIGURES FIGURE 2-1: BIG THUNDER WIND FARM TURBINE LAYOUT MAP... 4 FIGURE 6-1: BIG THUNDER WIND PARK NOISE ASSESSMENT MAP M.K. Ince and Associates Ltd. i

4 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 1 INTRODUCTION M. K. Ince and Associates Ltd. (MKI) was retained by Horizon Wind Inc. to prepare an Environmental Noise Impact Assessment for the proposed 32 MW Big Thunder Wind Park (the Project) in the Municipality of Neebing, Ontario. This project will be composed of 16 Enercon E82 turbines, with a manufacturer rated sound power level of db(a). Ontario Regulation (O. Reg.) 359/09 outlines the requirements of noise reporting. Under Section 54 of O. Reg. 359/09, no turbine can be placed within 550 m of a noise receptor. Section 55 of O. Reg. 359/09 outlines when a noise report is required based on the location of turbines and the nearest noise receptors. For the Big Thunder Wind Park a noise report would be required if the distance between the nearest noise receptor and wind turbine was less than 850 m. The minimum distance between any wind turbine and any noise receptor as defined in O. Reg. 359/09 is 1171 m. Additionally, receptor points were modeled at the nearby Loch Lomond Ski Area to determine noise levels at the Ski Hill, although these points are not required to be modeled as noise receptors. The results of noise modeling for the Big Thunder Wind Park are summarized within this report. This report has been prepared in accordance with the publication of the Ministry of the Environment entitled Noise Guidelines for Wind Farms dated October 2008, as referenced in O. Reg. 359/09, which includes the following: a) Outline all points of reception within 2 km of the nearest wind turbine b) Outline and define the noise area classification of all points of reception. c) Summarize background information on noise calculation method and parameters. d) Provide a summary table of the level of noise at all points of reception at a range of wind speeds, as predicted by the required ISO (Acoustics - Attenuation of sound during propagation outdoors) method. e) Provide a map of the project area with the turbine layout, noise receptors, and noise contour lines for a wind speed of 6 m/s at 10 m height. The noise level limit at any point of reception, specified by the Ministry of the Environment in the documents described above, is 40 dba at wind speeds of 6 m/s, which is equivalent to the noise level in a quiet room 1. More information on MOE noise limits is included in Table 4. Noise Limits at the Loch Lomond Ski Area are not governed by the aforementioned documents and are presented in this report for reference only. 1 Canadian Centre for Occupational Health and Safety website (Retrieved May 14, 2010) M.K. Ince and Associates Ltd. 1

5 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 2 GENERAL DESCRIPTION OF PROJECT SITE AND SURROUNDINGS 2.1 Wind Park Location The proposed wind park location is on the Nor Wester Mountains within the Municipality of Neebing, Ontario, southwest of the City of Thunder Bay. The wind park area is roughly bounded by Highway 61 to the northwest, Fort William First Nation reserve to the northeast and Loch Lomond to the east. The project will consist of 16 Enercon E82 wind turbines, with a project nameplate capacity of 32 MW. The turbines will be equipped with transformers at each base, and will be installed on 98 metre tall towers. Figure 2-1 shows the wind park location and location of proposed turbines in relation to the City of Thunder Bay. Figure 6-1 shows the location of the turbines, nearby noise receptors, and noise isolines. Receptor coordinates can be found in Table 1. Wind turbine coordinates can be found in Table Zoning The Official Plan for the Municipality of Neebing designates the project area as Environmental Protection (EP) and Watershed Reserve (WSR). A zoning map is provided as Appendix A. 2.3 Points of Reception (POR) Points of reception within a 2 km radius of any turbine, and several beyond, were analyzed and are outlined and defined in Section 3. UTM coordinates for all receptors are given in Table 1. All points of reception have been modeled using methods recommended in the Noise Guidelines for Wind Farms (Ministry of the Environment, October 2008) for two storey residences. This conservative assumption ensures that all points meet requirements for both one and two storey dwellings. The list of receptors has been updated since the report issued in May Lot boundaries were acquired, and vacant lots were added to the model. Some existing receptor locations were also updated using lot line information. Furthermore, five receptors were added at various locations on the Loch Lomond Ski Area for additional modeling. 2.4 Topography The topography of the wind park area is varied, with elevation varying from 280 m at the shore of Loch Lomond to 450 m at the peak of some hills in the area. The land cover is natural woodland with some areas of exposed rock north of the wind park area. The ground surrounding the Big Thunder Wind Park turbines and receptors is mainly forested with some exposed rock faces north of the site. A ground factor of 0.4 was chosen to conservatively M.K. Ince and Associates Ltd. 2

6 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report represent the ground cover. A ground factor of 0.4 is consistent with ground that is 40% porous and 60% hard and reflective. This is a conservative estimate of the ground cover in the project vicinity, as less than 60% of the ground surface is rock. This is a conservative assumption because porous ground causes greater noise attenuation than hard ground. Exposed rock cliffs are located north of the wind park area, between turbines and noise receptors. However, due to the relative orientation of wind turbines, cliffs and noise receptors, no amplification or echo effects are expected. For echoes to be produced, noise sources and receptors must be on the same side of a cliff to allow sound waves to bounce back from cliff faces. As the cliff faces are located between wind turbines and noise receptors, and are oriented to face noise receptors, these effects are not expected. M.K. Ince and Associates Ltd. 3

7 Big Thunder Wind Park Environmental Noise Impact Report February 10, 2011 Figure 2-1: Big Thunder Wind Farm Turbine Layout Map Figure 2-1: Big Thunder Wind Farm Turbine Layout Map 4

8 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 3 DESCRIPTION OF RECEPTORS 3.1 Big Thunder Wind Park Modeled Noise Receptors This report includes all homes or points of reception (receptors) within 2,000 metres of a wind turbine belonging to the project. Several receptors that lie more than 2,000 metres away from any turbines were also included for reference only. Five additional receptors were chosen for the Loch Lomond Ski Area which was modeled after requests for noise studies by the owner of the ski hill and members of the public Nearby Residences and Vacant Lots An initial list of all receptors surrounding the project was compiled by Horizon Wind Inc. through field visits. The coordinates provided by Horizon Wind Inc. were improved using satellite imagery. Lot boundaries were used to add receptors for vacant lots. Vacant lots were modeled as points either at locations consistent with local development (required by the Noise Guidelines for Wind Farms, Ministry of the Environment, October 2008) or at the centre of the lot (definition in O. Reg. 359/09). In each case, the method resulting in the receptor being placed closest to the wind farm was chosen. There are no participating receptors associated with the Big Thunder Wind Park. Figure 6-1 illustrates the receptor locations in relation to the turbine layout for the project. Receptor descriptions and coordinates are given in Table Loch Lomond Ski Area Five receptor locations were chosen at the Loch Lomond Ski Area. Three of these locations are at lift locations, one at the base of the ski hill and one on the run nearest to a turbine. All five locations where chosen based on satellite imagery. Figure 6-1 illustrates the locations of the five receptors at the Loch Lomond Ski Area in relation to the turbine layout for the project. Receptor descriptions and coordinates are given in Table Big Thunder Wind Park Noise Limit Classifications For the purposes of the calculation, all noise receptors were classified into a noise area dominated by natural sounds and with little to no road traffic. The acoustical characteristics of this area are consistent with that of a Class 3 Area as defined by the publication NPC 232 required by Noise Guidelines for Wind Farms (Ministry of the Environment, October 2008). M.K. Ince and Associates Ltd. 5

9 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Table 1 provides descriptions and locations for all receptors included in the analysis. Some receptors are single storey buildings, and some are two storey buildings however all residence and vacant lot receptors were modeled as two storey residences to be conservative. Two story residences were defined as points 4.5 m above the ground at the centre of the residence as per Section of Noise Guidelines for Wind Farms (Ministry of the Environment, October 2008). Table 1: Point of Reception Descriptions and Locations Point of Reception ID Description UTM Coordinates (NAD83) Easting (m) Northing (m) A Assumed 2 storey residence 324,880 5,352,699 B Assumed 2 storey residence 324,878 5,352,638 C Assumed 2 storey residence 325,016 5,352,588 D Assumed 2 storey residence 324,887 5,352,535 E Assumed 2 storey residence 324,877 5,352,477 F Assumed 2 storey residence 324,875 5,352,275 G Assumed 2 storey residence 325,009 5,352,145 H Assumed 2 storey residence 324,997 5,352,044 I Assumed 2 storey residence 324,932 5,351,918 J Assumed 2 storey residence 324,872 5,351,961 K Assumed 2 storey residence 324,931 5,351,869 L Assumed 2 storey residence 324,941 5,351,779 M Assumed 2 storey residence 324,849 5,351,641 N Assumed 2 storey residence 325,182 5,351,731 O Assumed 2 storey residence 325,208 5,351,610 P Assumed 2 storey residence 325,278 5,351,602 Q Assumed 2 storey residence 325,332 5,351,592 R Assumed 2 storey residence 325,389 5,351,594 S Assumed 2 storey residence 325,910 5,351,623 T Assumed 2 storey residence 325,899 5,351,850 U Assumed 2 storey residence 324,793 5,352,899 V Assumed 2 storey residence 324,885 5,352,762 W Assumed 2 storey residence 323,199 5,351,300 M.K. Ince and Associates Ltd. 6

10 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Point of Reception ID Description UTM Coordinates (NAD83) Easting (m) Northing (m) X Assumed 2 storey residence 324,752 5,352,139 Y Vacant Lot 324,635 5,352,276 Z Vacant Lot 324,154 5,352,292 AA Assumed 2 storey residence 323,988 5,352,087 AB Assumed 2 storey residence 323,847 5,352,127 AC Assumed 2 storey residence 323,764 5,352,155 AD Assumed 2 storey residence 325,260 5,351,713 AE Assumed 2 storey residence 324,397 5,352,059 AF Assumed 2 storey residence 324,991 5,352,674 AG Assumed 2 storey residence 324,974 5,352,725 AH Vacant Lot 323,966 5,352,316 AI Vacant Lot 324,291 5,352,287 AJ Vacant Lot 324,426 5,352,283 AK Vacant Lot 324,773 5,352,001 AL Vacant Lot 324,819 5,351,787 AM Vacant Lot 325,321 5,351,715 AN Vacant Lot 325,379 5,351,714 AO Vacant Lot 325,525 5,352,682 AP Vacant Lot 325,915 5,352,668 AQ Vacant Lot 326,323 5,352,600 AR Vacant Lot 324,259 5,351,451 AS LLSA - Chair 1 325,611 5,351,089 AT LLSA - Chair 2 326,349 5,351,786 AU LLSA - Chair 3 326,459 5,352,042 AV LLSA - Base 325,975 5,351,590 AW LLSA - Nearest Run 325,563 5,350,807 AX Vacant Lot 325,015 5,351,509 M.K. Ince and Associates Ltd. 7

11 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 3.3 Receptor and Calculation Assumptions Noise levels at potential receptors are predicted with the ISO calculation method Acoustics Attenuation of sound during propagation outdoors. This method accounts for site geometry, atmospheric conditions, and terrain type. For this calculation several assumptions are made: No noise obstacles such as specific buildings, cliffs, or vegetation are used. Atmospheric conditions for least impeded noise propagation are used. No meteorological correction factor is used. A ground factor of 0.4 is used for surrounding terrain. All receptors are 4.5 m off the ground. Receptors are at the centre of the residence, as specified in the Ministry of the Environment Noise Guidelines for Wind Farms document. The turbines could generate the maximum guaranteed sound power level at any wind speed as measured 10 m above the ground. A safety factor of 1.5 db(a) was added to the guaranteed sound power level. This is greater than the 1 db(a) safety factor recommended by the manufacturer to account for potential measurement error. A detailed discussion of wind turbine noise emissions can be found in Section 5 of this document. Sample calculations are provided in Appendix B. These assumptions result in conservative modeling of noise attenuation. These assumptions are all in accordance with the publication of the Ministry of the Environment entitled Noise Guidelines for Wind Farms dated October 2008, as referenced in O. Reg. 359/09. M.K. Ince and Associates Ltd. 8

12 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 4 DESCRIPTION OF SOURCES 4.1 Wind Turbine Description The Enercon E82 turbine proposed for use in the Big Thunder Wind Farm is a horizontal axis turbine with a three-bladed, 82 m diameter upwind rotor. The turbines will be mounted at a hub height of 98 metres. The turbines are gearless with active yaw and pitch regulation. They have synchronous generators and operate at rotational speeds between 6 and 18 rpm. Each turbine will be equipped with a transformer at the base. These transformers will take in 0.6 kv from the turbines, and output 25kV. Twenty-five kilovolt lines will transmit power from the transformers to two switching stations. These switching stations will collect the electricity transmitted by the internal electrical taplines and connect them to the electrical taplines leading out from the wind park to the points of interconnection. Switching stations will house meters, switches, controls and communications and do not contain any significant noise emitting equipment. They may require small 25 kv - 208/120V, 50 kva transformers to provide power for metering equipment on site. Noise Guidelines for Wind Farms (Ministry of the Environment, October 2008) do not require such transformers to be modeled as noise sources, since transformers of this size do not produce significant noise. Appendix C provides the general specifications for the Enercon E82 wind turbine. 4.2 Wind Farm Layout The Big Thunder Wind Farm consists of 16 Enercon E82 wind turbines. Wind turbine descriptions and locations are included in Table 2 on the following page. A map illustrating the wind park layout is shown in Figure 2-1. M.K. Ince and Associates Ltd. 9

13 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Table 2: Wind Turbine Locations Project Name: Big Thunder Wind Park Identifier Equipment Make and Model UTM Coordinates (NAD83) Easting (m) Northing (m) 1 Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height Enercon E82, 98 m hub height M.K. Ince and Associates Ltd. 10

14 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 5 WIND TURBINE NOISE EMISSION RATING The noise emission data for the E82 was provided by Enercon. Table 3 summarizes the acoustic emission information for the turbines, including the guaranteed sound power levels provided by the turbine manufacturer plus a 1.5 db(a) safety factor, and also the adjusted emission levels used in modeling. Appendix C contains the turbine specifications provided by Enercon. The complex terrain and annual average wind shear at the Big Thunder Wind Park warrants a shift of the noise emission curve toward higher sound levels at lower wind speeds. In order to take the wind shear into account in a conservative manner, the maximum guaranteed sound power level plus a 1.5 db(a) safety factor (105.0 db(a)) was used in the calculations at all wind speeds, as indicated in Table 3. This is a conservative assumption, assuming that the highest possible sound power level plus a 1.5 db(a) safety factor could be generated at any wind speed. This means that the noise contour line map predicted for wind speeds of 6 m/s is the same as that for 10 m/s. Table 3: Wind Turbine Acoustic Emissions Summary Make and Model: Enercon E82 Electrical Rating: 2.0 MW Hub Height (m): 98 Wind shear coefficient 1 : Conservatively Large 2 Octave Band Sound Power Level (db) Manufacturer's Emission Levels 3 Adjusted Emission Levels 4 Wind Speed (m/s) Frequency (Hz) 63 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA A-weighted As per Section of the Noise Guidelines for Wind Farms (Ministry of the Environment, October 2008). M.K. Ince and Associates Ltd. 11

15 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 2 The guaranteed maximum sound power level plus a 1.5 db(a) safety factor was used at all wind speeds. 3 A-weighted levels are the Enercon guaranteed sound power levels for the E82 at 98 m hub height. Appendix C contains the Enercon guaranteed sound power levels as provided by Enercon. Manufacturers choose guaranteed sound power levels which are higher than any measured sound power level. This means that measured octave band data is frequently not available for guaranteed sound power levels, as is the case for the E82. 4 A-weighted levels are the Enercon guaranteed sound power level for the E82 at 98 m hub height plus a 1.5 db(a) safety factor. This sound power level is higher than any measured sound level from the E82, therefore no octave band data was available from Enercon. The octave band data was generated by WindPro2.7 for an E82 with 98 m hub height. 5.1 Tonality Tonality refers to higher levels of noise emitted from a narrow band of frequencies. Most modern turbines do not have a perceptible tonal quality associated with their noise emissions. MOE rules state that if significant tonality is associated with wind turbine noise emissions a noise penalty may be applied. The ENERCON Sound Power Level Guarantee included in Appendix C indicates that A tonal audibility of La,k 2 db can be expected over the whole operational range (valid in the near vicinity of the turbine according to IEC ed.2). The turbine manufacturer has stated that the sound emitted by the E82 does not have a tonal quality significant enough to require a noise penalty. 5.2 Impulsivity Impulsivity refers to short bursts of noise, such as those created by hammering. Impulsive noise is generally not associated with modern wind turbines. The Enercon sound power level guarantee included in Appendix C indicates that no impulsive noise is generated by the E Octave Band data Octave band data used in the calculations was generated by WindPro 2.7. Octave band data was not provided by Enercon for the sound power level used. The generated octave band data is typically based on turbine sound power levels, rotor dimensions and RPM, and has no tonal quality (see Section 5). Generated data is provided in Table 4. M.K. Ince and Associates Ltd. 12

16 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 5.4 Transformer Noise Transformers will be installed at the base of each turbine, to bring the voltage from 0.6 kv as generated at the turbine to 25 kv for electricity distribution. The noise emitted by these transformers is typically negligible and as per MOE guidelines, and has not been included in this assessment. The low height above ground of the transformers is not conducive to significant noise propagation over long distances to receptors. The MOE guidelines state that transformers tying into lines with voltage below 50kV need not be included in the analysis. As described in Section 4.1 above, the switching substations do not contain any significant noise emitting equipment. M.K. Ince and Associates Ltd. 13

17 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 6 IMPACT ASSESSMENT 6.1 Calculated Noise Levels Calculated noise levels for each receptor are listed in Table 4, along with comparisons to the Ministry of the Environment noise limit at each wind speed evaluated. Additional details are included in Appendix D. Figure 6-1 below shows noise isolines indicated on a map along with all receptors and wind turbines. These isolines are valid for all wind speeds, as described in Section 5. All noise levels at receptors are calculated using the conservative parameters described in this report, and are within MOE noise emission limits for all wind speeds. Residences were modeled as 4.5 m tall points at the centre of the residence, as described in Section 3. Distances shown are the shortest horizontal distances from the source to the centre point of the residence. M.K. Ince and Associates Ltd. 14

18 Big Thunder Wind Park Environmental Noise Impact Report February 10, 2011 Figure 6-1: Big Thunder Wind Park Noise Assessment Map Figure 6-1: Big Thunder Wind Park Noise Assessment Map 15

19 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Table 4: Wind Turbine Noise Impact Summary Point of Reception ID Description Height Distance to Nearest Turbine Nearest Turbine ID Calculated Sound Levels at Selected Wind Speeds (db(a)) Ministry of the Environment Sound Level Limit (db(a))* A Assumed 2 storey residence 4.5 m B Assumed 2 storey residence 4.5 m C Assumed 2 storey residence 4.5 m D Assumed 2 storey residence 4.5 m E Assumed 2 storey residence 4.5 m F Assumed 2 storey residence 4.5 m G Assumed 2 storey residence 4.5 m H Assumed 2 storey residence 4.5 m I Assumed 2 storey residence 4.5 m J Assumed 2 storey residence 4.5 m K Assumed 2 storey residence 4.5 m L Assumed 2 storey residence 4.5 m M Assumed 2 storey residence 4.5 m N Assumed 2 storey residence 4.5 m O Assumed 2 storey residence 4.5 m P Assumed 2 storey residence 4.5 m Q Assumed 2 storey residence 4.5 m (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) 6 (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) M.K. Ince and Associates Ltd. 16

20 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Point of Reception ID Description Height Distance to Nearest Turbine Nearest Turbine ID Calculated Sound Levels at Selected Wind Speeds (db(a)) Ministry of the Environment Sound Level Limit (db(a))* R Assumed 2 storey residence 4.5 m S Assumed 2 storey residence 4.5 m T Assumed 2 storey residence 4.5 m U Assumed 2 storey residence 4.5 m V Assumed 2 storey residence 4.5 m W Assumed 2 storey residence 4.5 m X Assumed 2 storey residence 4.5 m Y Vacant Lot 4.5 m Z Vacant Lot 4.5 m AA Assumed 2 storey residence 4.5 m AB Assumed 2 storey residence 4.5 m AC Assumed 2 storey residence 4.5 m AD Assumed 2 storey residence 4.5 m AE Assumed 2 storey residence 4.5 m AF Assumed 2 storey residence 4.5 m AG Assumed 2 storey residence 4.5 m AH Vacant Lot 4.5 m AI Vacant Lot 4.5 m (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) 6 (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) M.K. Ince and Associates Ltd. 17

21 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Point of Reception ID Description Height Distance to Nearest Turbine Nearest Turbine ID Calculated Sound Levels at Selected Wind Speeds (db(a)) Ministry of the Environment Sound Level Limit (db(a))* AJ Vacant Lot 4.5 m AK Vacant Lot 4.5 m AL Vacant Lot 4.5 m AM Vacant Lot 4.5 m AN Vacant Lot 4.5 m AO Vacant Lot 4.5 m AP Vacant Lot 4.5 m AQ Vacant Lot 4.5 m AR Vacant Lot 4.5 m AS Chair m AT Chair m AU Chair m AV Base 4.5 m AW Nearest Run 4.5 m AX Vacant Lot 4.5 m * Note: Noise limits for the Loch Lomond Ski Area points of reception (AS through AW) are not regulated under Ministry of the Environment sound level limits, and are presented for reference only. 6 (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) 6 (m/s) 7 (m/s) 8 (m/s) 9 (m/s) 10 (m/s) M.K. Ince and Associates Ltd. 18

22 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 6.2 Mitigation Measures Based on the results of the Noise Study, all MOE-defined noise receptors are conservatively predicted to experience wind turbine noise levels within MOE limits. No mitigation measures are recommended by MKI. 6.3 Cumulative Impacts There are no existing or approved wind farms within 5,000 metres of any point of reception of the Big Thunder Wind Park. Therefore cumulative noise impacts from the Big Thunder Wind Park and other wind farms are not anticipated. M.K. Ince and Associates Ltd. 19

23 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 7 CONCLUSIONS AND RECOMMENDATIONS When modeled according to the ISO method Acoustics attenuation of sound during propagation outdoors, all noise levels at points of reception as defined by REA are predicted to be within the most restrictive MOE noise level limit of 40 dba (equivalent to the sound level inside a quiet room) 2. The following conclusions and conditions are also listed: The maximum guaranteed turbine sound power level plus a 1.5 db(a) safety factor was used to ensure that the model was conservative. Maximum turbine sound power levels were assumed at all wind speeds. Tonality penalties do not apply to the turbine noise emission levels. Octave band data used in the calculations was generated by WindPro 2.7. A conservative ground factor of 0.4 was used in the model to represent the surrounding terrain. Conservative atmospheric conditions for least impeded noise propagation were used for the calculations. No acoustic shielding specifically from sound impeding obstacles such as terrain, vegetation or buildings etc. was used. Receptors were modeled as points 4.5 m above ground level at the centre of the residences. The modeling indicates that the MOE limits are met at all receptors. Conservative assumptions have been selected for the turbine noise emission level, point of reception height, and atmospheric conditions. In addition, the presence of sound impeding obstacles was not modeled. Therefore the results of the calculations performed for this report are considered to be conservative. 2 Canadian Centre for Occupational Health and Safetywebsite (Retrieved May 14, 2010) M.K. Ince and Associates Ltd. 20

24 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report 8 QUALIFICATIONS AND LIMITATIONS M. K. Ince & Associates Ltd. has prepared this report in accordance with its proposal and information provided by its Client. The information and analysis contained herein is for the sole benefit of the Client and may not be relied upon by any other person. The contents of this report are based upon our understanding of guidelines and regulations which we believe to be current at this time. Changes in guidelines, regulations, and enforcement policies can occur at any time, and such changes could affect the conclusions and recommendations of this report. While we have referred to and made use of reports and specifications prepared by others, we assume no liability for the accuracy of the information contained within those reports and specifications. M.K. Ince and Associates Ltd. 21

25 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Appendix A Zoning Maps M.K. Ince and Associates Ltd. Appendix

26 LEGEND: R = Rural WSR = Watershed Reserve EP = Environmental Protection A = Agricultural

27 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Appendix B Sample Calculations M.K. Ince and Associates Ltd. Appendix

28 Sample Calculations Calculations are shown for Receptor S, which is the receptor with the highest predicted sound power level (with the exception of the Loch Lomond Ski Area receptors). The nearest turbine is Turbine 13, 1171 m away. These calculations were performed using the maximum guaranteed noise level plus a 1.5 db(a) safety factor, for a total of 105 db(a). Receptors were modeled as point receptors 4.5 m above grade. All values have been calculated in accordance with ISO Noise levels are calculated by finding the attenuation values for each turbine at each frequency band and applying the predicted attenuation to the turbine octave band sound emission values. Illustrative calculations will be shown for Turbine 13 only. Turbine 13 is the closest turbine to Receptor S (1171 metres from the centre of the residence). 1 ASSUMPTIONS Assumptions used in these calculations are the same as those used by WindPro 2.7, namely: Noise calculation model: ISO General Ground attenuation factor (G) = 0.4 Meteorological coefficient (C0) = 0.0 db Receptor is downwind of all turbines Turbine maximum guaranteed noise level of db(a) +1.5 db(a) safety factor, for a total of 105 db(a) The Enercon E82 is an omnidirectional point sound source Temperature is 10 o C Relative humidity is 70% Receptor is a point 4.5 m above grade at the centre of the residence 2 GENERAL EQUATION From ISO , equation (3), the equivalent continuous downwind sound pressure level at a receiver location is given by: L ft (DW)= L W +D C -A Where L W is the turbine octave band sound power level, D C is the directivity correction, and A is the octave band attenuation. M. K. INCE AND ASSOCIATES LTD. B1 May 4, 2011

29 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations 3 OCTAVE BAND SOUND POWER LEVELS Octave band sound power levels (L W ) as generated by WindPro are shown in Table 1 below: Table 1: WindPro Generated Octave Band Sound Power Levels Frequency (Hz) Sum LWfA (db(a)) DIRECTIVITY CORRECTION The turbine is assumed to be an omnidirectional point sound source radiating into free space. This means that no directivity correction is needed (ie, D C = 0 db). 5 OCTAVE BAND ATTENUATION The formula for attenuation given as equation (4) in ISO is: Where: A div is the attenuation due to geometric divergence A atm is the attenuation due to atmospheric absorption A gr is the attenuation due to the ground A bar is the attenuation due to barriers A misc is the attenuation due to other effects 5.1 Attenuation due to Geometric Divergence This term accounts for the attenuation due to the sound spreading out spherically from the point source. The formula for this from ISO is given as: Where d is the distance between the source and the receptor and d 0 is the reference distance (1m). For Turbine 13 at all frequencies, this attenuation was calculated as follows: a) Calculate d (actual distance the sound travels from the turbine hub to the receptor): M. K. INCE AND ASSOCIATES LTD. B2 May 4, 2011

30 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations b) Calculate A div : Atmospheric Attenuation This term accounts for the attenuation due to sound being absorbed by the air. The formula for this given as equation (8) in ISO is: /1000 Where is the atmospheric attenuation coefficient in db/km for each octave band at the midband frequency and is the distance between the source and receptor in metres. Air temperature of 10 C, and relative humidity of 70% were chosen since these conditions represent the least atmospheric attenuation of all possible values represented in ISO The values of α for these conditions given in Table 2 of ISO are shown in Table 2 below. Table 2: Atmospheric Attenuation Coefficient values for 10 C and 70% RH (from ISO , Table 2) Nominal Midband Frequency (Hz) Atmospheric attenuation coefficient, α (db/km) For Turbine 13 at 63 Hz, this attenuation was calculated as follows: Calculate A atm : M. K. INCE AND ASSOCIATES LTD. B3 May 4, 2011

31 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations The calculations for the other frequencies are completed in the same manner. 5.3 Ground Attenuation This term accounts for the attenuation due to sound being absorbed and reflected by the ground. The formula for this given as equation (9) in ISO is: Where: A s is the attenuation due to the ground near the source A r is the attenuation due to the ground near the receptor, and A m is the attenuation due to the ground between source and receptor As The formulae for calculating A s vary depending on the nominal midband frequency. However, because of the height of the source above the ground, many of the terms in these equations are negligible. The calculations for Turbine 13 as described in ISO are as follows: For 63 Hz: 1.5 For 125 Hz: For 250 Hz: For 500 Hz: For 1000 Hz: For 2000 Hz: For 4000 Hz: For 8000 Hz: Ar The formulae for calculating A r are very similar to those for A s. In this case, since the receptor is only 4.5m above the ground, the terms which were negligible in A s become important. Including all these calculations would be prohibitively long, so a few illustrative examples of calculations for Turbine 13 as described in ISO are as shown below: For 63 Hz: 1.5 M. K. INCE AND ASSOCIATES LTD. B4 May 4, 2011

32 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations For 125 Hz: For 1000 Hz: For 8000 Hz: Am Mid region ground attenuation is nonzero only if the distance between the source and receptor is greater than 30 (ISO Table 3). Turbine 1 is sufficiently far away from Receptor S at 4044 m. This is large enough for A m to be nonzero. For Turbine 1, the calculations are as follows a) Calculate q (a term used in all mid region ground attenuation calculations): M. K. INCE AND ASSOCIATES LTD. B5 May 4, 2011

33 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations b) Calculate A m : For 63 Hz: For all other frequencies: Barrier and Miscellaneous Attenuation For all receptors A bar and A misc are assumed to be zero. No barrier and no miscellaneous attenuation is likely to be present. This is a conservative assumption. 6 SUMMARY TABLES Table 3 summarizes the results of all calculations for the noise level at Receptor S from Turbine 13. Table 3: Noise Effects of Turbine 13 on Receptor S Nom. Midband Freq. 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz LWfA A Adiv Aatm Agr As Ar Am Abar Amisc LWfT Sum Table 4 summarizes the results of the calculations for the noise level caused by all turbines at Receptor S. M. K. INCE AND ASSOCIATES LTD. B6 May 4, 2011

34 Big Thunder Wind Park Appendix B Noise Modeling Sample Calculations Table 4: Noise Impact from all Turbines on Receptor S Turbine ID Noise Level (db(a)) Total 37.5 WindPro 2.7 returned a predicted noise level of 37.5 db(a). M. K. INCE AND ASSOCIATES LTD. B7 May 4, 2011

35 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Appendix C Enercon E82 Specifications M.K. Ince and Associates Ltd. Appendix

36 Sound Power Level E-82 E2 Page 1 of 3 Sound Power Level of the ENERCON E-82 E2 Operational Mode 2000 kw (Data Sheet) Imprint Editor: Telephone: Fax: Copyright: Updates: Revision Revision: 1.0 Department: ENERCON GmbH Dreekamp Aurich Germany Unless otherwise specified in this document, the contents of this document are protected by copyright of ENERCON GmbH. All rights reserved. No use, including any copying or publishing, of this information is permitted without the prior written consent of ENERCON GmbH. ENERCON GmbH reserves the right to continuously update and modify this document and the items described therein at any time without prior notice. ENERCON GmbH / Site Assessment Glossary WEC WECs means an ENERCON wind energy converter. means more than one ENERCON wind energy converter. Document information: Author/Revisor/ date: Approved / date: Revision /date: Sch/ MK/ 04/ / April 2010 Documentname Copyright ENERCON GmbH. All rights reserved. SIAS-04-SPL E-82 E2 2MW Rev1_0-eng-eng.doc

37 Sound Power Level E-82 E2 Page 2 of 3 Sound Power Level for the E-82 E2 with 2000 kw rated power in relation to wind speed at 10 m height hub height V s in 10 m height 78 m 85 m 98 m 108 m 138 m 5 m/s 96,3 db(a) 96.6 db(a) 97.2 db(a) 97.5 db(a) 98.2 db(a) 6 m/s db(a) db(a) db(a) db(a) db(a) 7 m/s db(a) db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 8 m/s 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 9 m/s 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 10 m/s 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 95% rated power 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) 103,5 db(a) Measured value at 95% rated power 102,5 db(a) KCE in relation to wind speed in hub height wind speed at hub height [m/s] Sound Power Level [db(a)] The relation between the sound power level and the standardized wind speed in 10 m height as shown above is valid on the premise of a logarithmic wind profile with a roughness length of 0.05 m. The relation between the sound power level and the wind speed at hub height applies for all hub heights. During the sound measurements the wind speeds are derived from the power output and the power curve of the WEC. 2. A tonal audibility of ΔL a,k 2 db can be expected over the whole operational range (valid in the near vicinity of the turbine according to IEC ed. 2). 3. The sound power level values given in the table are valid for the Operational Mode 2000 kw (defined via the rotational speed range of 6 17,5 rpm). The respective power curve is the calculated power curve E-82 E2 2MW dated November 2009 (Rev. 3.x). 4. The values displayed in the tables above are based on official and internal measurements of the sound power level. If available the official measured values are given in this document as a Document information: Author/Revisor/ date: Approved / date: Revision /date: Sch/ MK/ 04/ / April 2010 Documentname Copyright ENERCON GmbH. All rights reserved. SIAS-04-SPL E-82 E2 2MW Rev1_0-eng-eng.doc

38 Sound Power Level E-82 E2 Page 3 of 3 reference (in italic print). The extracts of the official measurements can be made available upon request. The values given in the measurement extracts do not replace the values given in this document. All measurements have been carried out according to the recommended German and international standards and guidelines as defined in the measurement reports, respectively. 5. Due to the typical measurement uncertainties, if the sound power level is measured according to one of the accepted methods the measured values can differ from the values shown in this document in the range of +/- 1 db. Accepted measurement methods are: a) IEC ed. 2 ( Wind turbine generator systems Part 11: Acoustic noise measurement techniques; Second edition, ), and b) the FGW-Guidelines ( Technische Richtlinie für Windenergieanlagen Teil 1: Bestimmung der Schallemissionswerte, published by the association Fördergesellschaft für Windenergie e.v., 18 th revision). If the difference between total noise and background noise during a measurement is less than 6 db a higher uncertainty must be considered. 6. For noise-sensitive sites it is possible to operate the E-82 E2 with reduced rotational speed and reduced rated power during night time. The sound power levels resulting from such operational mode can be provided in a separate document upon request. 7. The sound power level of a wind turbine depends on several factors such as but not limited to regular maintenance and day-to-day operation in compliance with the manufacturer s operating instructions. Therefore, this data sheet can not, and is not intended to, constitute an express or implied warranty towards the customer that the E-82 E2 WEC will meet the exact sound power level values as shown in this document at any project specific site. Document information: Author/Revisor/ date: Approved / date: Revision /date: Sch/ MK/ 04/ / April 2010 Documentname Copyright ENERCON GmbH. All rights reserved. SIAS-04-SPL E-82 E2 2MW Rev1_0-eng-eng.doc

39 Big Thunder Wind Park May 4, 2011 DRAFT Environmental Noise Impact Report Appendix D WindPRO 2.7 Noise Calculations M.K. Ince and Associates Ltd. Appendix

40 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) DECIBEL - Main Result Calculation: R E82.H98.16, G=0.4, db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 1 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ Noise calculation model: ISO General Wind speed: 6.0 m/s Ground attenuation: General, Ground factor: 0.4 Meteorological coefficient, C0: 0.0 db Type of demand in calculation: 1: noise is compared to demand (DK, DE, SE, NL etc.) Noise values in calculation: All noise values are mean values (Lwa) (Normal) Pure tones: Pure and Impulse tone penalty are added to source noise Height above ground level, when no value in NSA object: 4.5 m Don't allow override of model height with height from NSA object Deviation from "official" noise demands. Negative is more restrictive, positive is less restrictive.: 0.0 db(a) Scale 1:100,000 New Noise sensitive area s UTM NAD83 Zone: 16 type Noise data East North Z Row data/description Valid Manufact. Type-generator Power, Rotor Hub Creator Name Wind Status Hub LwA,ref Pure Octave rated diameter height speed height tones data UTM NAD83 Zone: 16 [m] [kw] [m] [m] [m/s] [m] [db(a)] 1 323,472 5,348, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 2 323,672 5,348, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 3 323,851 5,349, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 4 324,172 5,349, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 5 324,563 5,349, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 6 325,172 5,349, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 7 324,972 5,349, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 8 324,772 5,350, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) 9 325,072 5,350, Enercon E !-! hub:...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,043 5,350, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,472 5,350, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,119 5,350, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,472 5,349, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,672 5,349, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,273 5,349, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) ,352 5,348, Enercon E !-! hub...yes ENERCON E dBA-2,000 2, USER Runtime input 6.0 User value db Generic *) *)Notice: One or more noise data for this is generic or input by user Calculation Results Sound Level Noise sensitive area UTM NAD83 Zone: 16 Demands Sound Level Demands fulfilled? No. Name East North Z Imission Noise From s Noise height [m] [m] [db(a)] [db(a)] A Noise sensitive point: (619) 324,880 5,352, Yes B Noise sensitive point: (620) 324,878 5,352, Yes C moved based on Google Earth imagery 325,016 5,352, Yes D Noise sensitive point: (622) 324,887 5,352, Yes E Noise sensitive point: (623) 324,877 5,352, Yes F Noise sensitive point: (624) 324,875 5,352, Yes G modified based on Google Earth imagery 325,009 5,352, Yes H modified based on Google Earth imagery 324,997 5,352, Yes I modified based on Google Earth imagery 324,932 5,351, Yes J modified based on Google Earth imagery 324,872 5,351, Yes K modified based on Google Earth imagery 324,931 5,351, Yes L modified based on Google Earth imagery 324,941 5,351, Yes M modified based on Google Earth imagery s1 324,849 5,351, Yes N moved based on Google Earth imagery 325,182 5,351, Yes O moved based on Google Earth imagery s2 325,208 5,351, Yes P moved based on Google Earth imagery s3 325,278 5,351, Yes To be continued on next page...

41 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) DECIBEL - Main Result Calculation: R E82.H98.16, G=0.4, db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 2 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ continued from previous page Noise sensitive area UTM NAD83 Zone: 16 Demands Sound Level Demands fulfilled? No. Name East North Z Imission Noise From s Noise height [m] [m] [db(a)] [db(a)] Q moved south based on Google Earth imagery s4 325,332 5,351, Yes R moved based on Google Earth imagerys5 - moved again due to lot lines 325,389 5,351, Yes S Noise sensitive point: User defined (555) 325,910 5,351, Yes T moved based on Google Earth imagery 325,899 5,351, Yes U moved based on Google Earth imagery 324,793 5,352, Yes V Noise sensitive point: (640) 324,885 5,352, Yes W Noise sensitive point: User defined (641) 323,199 5,351, Yes X moved based on Google Earth imagery 324,752 5,352, Yes Y Vacant Lot 5 324,635 5,352, Yes Z Vacant Lot 2 324,154 5,352, Yes AA moved based on Google Earth imagery 323,988 5,352, Yes AB moved based on Google Earth imagery 323,847 5,352, Yes AC moved based on Google Earth imagery 323,764 5,352, Yes AD added based on Google Earth imagery 325,260 5,351, Yes AE added based on Google Earth imagery 324,397 5,352, Yes AF added based on Google Earth imagery 324,991 5,352, Yes AG added based on Google Earth imagery 324,974 5,352, Yes AH Vacant Lot 1 323,966 5,352, Yes AI Vacant Lot 3 324,291 5,352, Yes AJ Vacant Lot 4 324,426 5,352, Yes AK Vacant Lot 6 324,773 5,352, Yes AL Vacant Lot 7 324,819 5,351, Yes AM Vacant Lot 9 325,321 5,351, Yes AN Vacant Lot ,379 5,351, Yes AO Vacant Lot ,525 5,352, Yes AP Vacant Lot ,915 5,352, Yes AQ Vacant Lot ,323 5,352, Yes AR Vacant Lot ,259 5,351, Yes AS Chair 1 325,611 5,351, Yes AT Chair 2 326,349 5,351, Yes AU Chair 3 326,459 5,352, Yes AV Base 325,975 5,351, Yes AW Nearest Run 325,563 5,350, Yes AX Vacant Lot 8 325,015 5,351, Yes Distances (m) NSA A B C D E F G H I J K L M N O P Q R S To be continued on next page... WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

42 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) DECIBEL - Main Result Calculation: R E82.H98.16, G=0.4, db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 3 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ continued from previous page NSA T U V W X Y Z AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

43 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 4 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Assumptions Calculated L(DW) = LWA,ref + K + Dc - (Adiv + Aatm + Agr + Abar + Amisc) - Cmet (when calculated with ground attenuation, then Dc = Domega) LWA,ref: Sound pressure level at K: Pure tone Dc: Directivity correction Adiv: the attenuation due to geometrical divergence Aatm: the attenuation due to atmospheric absorption Agr: the attenuation due to ground effect Abar: the attenuation due to a barrier Amisc: the attenuation due to miscellaneous other effects Cmet: Meteorological correction Calculation Results Noise sensitive area: A Noise sensitive point: (619) 1 4,528 4, ,086 4, ,486 3, ,183 3, ,955 2, ,117 3, ,805 2, ,405 2, ,411 2, ,831 2, ,638 2, ,880 2, ,311 3, ,670 3, ,770 3, ,078 4, Sum Noise sensitive area: B Noise sensitive point: (620) 1 4,469 4, ,027 4, ,427 3, ,123 3, ,894 2, ,056 3, ,744 2, ,344 2, ,350 2, ,794 2, ,591 2, ,825 2, To be continued on next page...

44 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 5 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 13 3,259 3, ,618 3, ,715 3, ,022 4, Sum Noise sensitive area: C moved based on Google Earth imagery 1 4,467 4, ,023 4, ,424 3, ,109 3, ,863 2, ,996 3, ,692 2, ,305 2, ,293 2, ,656 2, ,467 2, ,722 2, ,149 3, ,507 3, ,618 3, ,927 3, Sum Noise sensitive area: D Noise sensitive point: (622) 1 4,374 4, ,931 3, ,332 3, ,025 3, ,793 2, ,953 2, ,640 2, ,242 2, ,247 2, ,723 2, ,504 2, ,729 2, ,165 3, ,524 3, ,616 3, ,923 3, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

45 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 6 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: E Noise sensitive point: (623) 1 4,316 4, ,873 3, ,273 3, ,966 2, ,734 2, ,896 2, ,583 2, ,184 2, ,190 2, ,696 2, ,466 2, ,682 2, ,120 3, ,479 3, ,566 3, ,873 3, Sum Noise sensitive area: F Noise sensitive point: (624) 1 4,125 4, ,681 3, ,082 3, ,770 2, ,533 2, ,695 2, ,381 2, ,982 2, ,989 2, ,582 2, ,317 2, ,506 2, ,949 2, ,309 3, ,382 3, ,688 3, Sum Noise sensitive area: G modified based on Google Earth imagery 1 4,052 4, ,606 3, ,008 3, ,683 2, ,425 2, ,554 2, ,249 2, To be continued on next page...

46 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 7 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 1,864 1, ,850 1, ,400 2, ,131 2, ,327 2, ,767 2, ,127 3, ,209 3, ,516 3, Sum Noise sensitive area: H modified based on Google Earth imagery 1 3,954 3, ,508 3, ,911 2, ,583 2, ,324 2, ,454 2, ,148 2, ,762 1, ,750 1, ,358 2, ,067 2, ,245 2, ,689 2, ,049 3, ,121 3, ,428 3, Sum Noise sensitive area: I modified based on Google Earth imagery 1 3,813 3, ,367 3, ,769 2, ,443 2, ,188 2, ,334 2, ,022 2, ,630 1, ,628 1, ,356 2, ,030 2, ,171 2, ,622 2, ,982 2, To be continued on next page...

47 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 8 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 3,035 3, ,339 3, Sum Noise sensitive area: J modified based on Google Earth imagery 1 3,830 3, ,385 3, ,786 2, ,466 2, ,222 2, ,384 2, ,067 2, ,668 1, ,677 1, ,429 2, ,103 2, ,240 2, ,692 2, ,052 3, ,100 3, ,404 3, Sum Noise sensitive area: K modified based on Google Earth imagery 1 3,767 3, ,321 3, ,724 2, ,396 2, ,140 2, ,286 2, ,973 1, ,581 1, ,579 1, ,336 2, ,999 2, ,131 2, ,583 2, ,943 2, ,992 3, ,296 3, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

48 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 9 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: L modified based on Google Earth imagery 1 3,688 3, ,242 3, ,645 2, ,315 2, ,053 2, ,195 2, ,883 1, ,493 1, ,489 1, ,289 2, ,935 1, ,051 2, ,505 2, ,865 2, ,907 2, ,210 3, Sum Noise sensitive area: M modified based on Google Earth imagery s1 1 3,525 3, ,079 3, ,482 2, ,154 2, ,902 1, ,070 2, ,749 1, ,347 1, ,363 1, ,325 2, ,930 1, ,997 2, ,457 2, ,815 2, ,830 2, ,130 3, Sum Noise sensitive area: N moved based on Google Earth imagery 1 3,748 3, ,301 3, ,712 2, ,362 2, ,065 2, ,135 2, ,847 1, To be continued on next page...

49 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 10 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 1,492 1, ,439 1, ,050 2, ,718 1, ,881 1, ,326 2, ,686 2, ,760 2, ,067 3, Sum Noise sensitive area: O moved based on Google Earth imagery s2 1 3,653 3, ,206 3, ,620 2, ,265 2, ,958 1, ,014 2, ,730 1, ,384 1, ,321 1, ,978 1, ,620 1, ,764 1, ,211 2, ,571 2, ,639 2, ,946 2, Sum Noise sensitive area: P moved based on Google Earth imagery s3 1 3,680 3, ,233 3, ,650 2, ,291 2, ,975 1, ,009 2, ,733 1, ,401 1, ,322 1, ,910 1, ,561 1, ,722 1, ,165 2, ,525 2, To be continued on next page...

50 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 11 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 2,604 2, ,912 2, Sum Noise sensitive area: Q moved south based on Google Earth imagery s4 1 3,698 3, ,252 3, ,672 2, ,309 2, ,986 2, ,002 2, ,734 1, ,412 1, ,322 1, ,856 1, ,514 1, ,687 1, ,127 2, ,487 2, ,575 2, ,883 2, Sum Noise sensitive area: R moved based on Google Earth imagerys5 - moved again due to lot lines 1 3,728 3, ,283 3, ,705 2, ,339 2, ,011 2, ,010 2, ,748 1, ,437 1, ,336 1, ,805 1, ,473 1, ,663 1, ,099 2, ,459 2, ,557 2, ,865 2, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

51 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 12 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: S Noise sensitive point: User defined (555) 1 4,044 4, ,606 3, ,053 3, ,670 2, ,298 2, ,157 2, ,965 1, ,748 1, ,569 1, ,359 1, ,171 1, ,538 1, ,912 1, ,259 2, ,455 2, ,763 2, Sum Noise sensitive area: T moved based on Google Earth imagery 1 4,221 4, ,780 3, ,217 3, ,840 2, ,480 2, ,368 2, ,163 2, ,920 1, ,760 1, ,505 1, ,379 1, ,764 1, ,132 2, ,477 2, ,681 2, ,989 2, Sum Noise sensitive area: U moved based on Google Earth imagery 1 4,693 4, ,253 4, ,654 3, ,361 3, ,147 3, ,325 3, ,008 3, To be continued on next page...

52 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 13 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 2,603 2, ,618 2, ,029 3, ,850 2, ,098 3, ,528 3, ,887 3, ,988 3, ,296 4, Sum Noise sensitive area: V Noise sensitive point: (640) 1 4,589 4, ,147 4, ,547 3, ,245 3, ,018 3, ,179 3, ,867 2, ,469 2, ,473 2, ,869 2, ,685 2, ,934 2, ,364 3, ,723 3, ,827 3, ,135 4, Sum Noise sensitive area: W Noise sensitive point: User defined (641) 1 2,916 2, ,548 2, ,038 2, ,962 1, ,056 2, ,607 2, ,262 2, ,866 1, ,125 2, ,868 3, ,348 3, ,157 3, ,602 3, ,914 3, To be continued on next page...

53 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 14 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 3,725 3, ,965 3, Sum Noise sensitive area: X moved based on Google Earth imagery 1 3,956 3, ,513 3, ,913 2, ,608 2, ,386 2, ,577 2, ,254 2, ,843 1, ,871 1, ,618 2, ,311 2, ,455 2, ,907 2, ,267 3, ,313 3, ,617 3, Sum Noise sensitive area: Y Vacant Lot 5 1 4,051 4, ,611 3, ,012 3, ,720 2, ,516 2, ,733 2, ,404 2, ,985 2, ,028 2, ,787 2, ,489 2, ,634 2, ,086 3, ,446 3, ,489 3, ,792 3, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

54 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 15 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: Z Vacant Lot 2 1 3,955 3, ,529 3, ,939 2, ,696 2, ,564 2, ,882 2, ,532 2, ,089 2, ,197 2, ,219 3, ,872 2, ,944 2, ,406 3, ,763 3, ,752 3, ,046 4, Sum Noise sensitive area: AA moved based on Google Earth imagery 1 3,727 3, ,306 3, ,722 2, ,498 2, ,396 2, ,758 2, ,402 2, ,955 1, ,094 2, ,288 3, ,897 2, ,914 2, ,379 3, ,730 3, ,685 3, ,972 3, Sum Noise sensitive area: AB moved based on Google Earth imagery 1 3,750 3, ,336 3, ,758 2, ,552 2, ,472 2, ,857 2, ,499 2, To be continued on next page...

55 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 16 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 2,051 2, ,203 2, ,434 3, ,039 3, ,045 3, ,511 3, ,860 3, ,805 3, ,089 4, Sum Noise sensitive area: AC moved based on Google Earth imagery 1 3,770 3, ,360 3, ,788 2, ,591 2, ,524 2, ,921 2, ,562 2, ,115 2, ,273 2, ,521 3, ,125 3, ,126 3, ,591 3, ,940 3, ,880 3, ,162 4, Sum Noise sensitive area: AD added based on Google Earth imagery 1 3,768 3, ,321 3, ,735 2, ,380 2, ,073 2, ,119 2, ,840 1, ,498 1, ,429 1, ,972 1, ,649 1, ,828 1, ,268 2, ,628 2, To be continued on next page...

56 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 17 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 2,714 2, ,022 3, Sum Noise sensitive area: AE added based on Google Earth imagery 1 3,778 3, ,343 3, ,745 2, ,473 2, ,304 2, ,582 2, ,238 2, ,802 1, ,888 1, ,900 2, ,539 2, ,608 2, ,070 3, ,427 3, ,423 3, ,719 3, Sum Noise sensitive area: AF added based on Google Earth imagery 1 4,540 4, ,096 4, ,496 3, ,185 3, ,944 2, ,083 3, ,778 2, ,388 2, ,379 2, ,731 2, ,552 2, ,811 2, ,237 3, ,595 3, ,707 3, ,016 4, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

57 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 18 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: AG added based on Google Earth imagery 1 4,582 4, ,139 4, ,539 3, ,230 3, ,992 3, ,135 3, ,829 2, ,437 2, ,431 2, ,778 2, ,603 2, ,864 2, ,290 3, ,648 3, ,761 3, ,070 4, Sum Noise sensitive area: AH Vacant Lot 1 1 3,951 3, ,533 3, ,950 2, ,728 2, ,624 2, ,976 2, ,621 2, ,175 2, ,303 2, ,399 3, ,040 3, ,090 3, ,554 3, ,908 3, ,881 3, ,171 4, Sum Noise sensitive area: AI Vacant Lot 3 1 3,977 3, ,546 3, ,952 2, ,694 2, ,541 2, ,832 2, ,486 2, To be continued on next page...

58 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 19 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 2,049 2, ,139 2, ,094 3, ,760 2, ,851 2, ,311 3, ,669 3, ,673 3, ,969 3, Sum Noise sensitive area: AJ Vacant Lot 4 1 4,002 4, ,568 3, ,971 2, ,699 2, ,526 2, ,789 2, ,449 2, ,017 2, ,089 2, ,973 2, ,652 2, ,763 2, ,220 3, ,579 3, ,598 3, ,897 3, Sum Noise sensitive area: AK Vacant Lot 6 1 3,833 3, ,389 3, ,789 2, ,479 2, ,250 2, ,438 2, ,115 2, ,705 1, ,731 1, ,535 2, ,205 2, ,330 2, ,784 2, ,143 3, To be continued on next page...

59 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 20 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 3,182 3, ,484 3, Sum Noise sensitive area: AL Vacant Lot 7 1 3,649 3, ,204 3, ,605 2, ,285 2, ,043 2, ,220 2, ,897 1, ,492 1, ,513 1, ,405 2, ,037 2, ,130 2, ,588 2, ,946 2, ,972 2, ,273 3, Sum Noise sensitive area: AM Vacant Lot 9 1 3,800 3, ,353 3, ,769 2, ,411 2, ,096 2, ,125 2, ,853 1, ,522 1, ,441 1, ,918 1, ,606 1, ,802 1, ,238 2, ,598 2, ,694 2, ,002 3, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

60 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 21 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: AN Vacant Lot ,827 3, ,380 3, ,799 2, ,437 2, ,116 2, ,128 2, ,863 1, ,542 1, ,450 1, ,865 1, ,563 1, ,775 1, ,207 2, ,567 2, ,672 2, ,981 2, Sum Noise sensitive area: AO Vacant Lot ,752 4, ,305 4, ,712 3, ,369 3, ,075 3, ,106 3, ,840 2, ,501 2, ,428 2, ,362 2, ,291 2, ,649 2, ,037 3, ,385 3, ,566 3, ,875 3, Sum Noise sensitive area: AP Vacant Lot ,921 4, ,475 4, ,892 3, ,532 3, ,206 3, ,160 3, ,928 2, To be continued on next page...

61 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 22 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 8 2,633 2, ,517 2, ,120 2, ,145 2, ,576 2, ,925 2, ,260 3, ,491 3, ,797 3, Sum Noise sensitive area: AQ Vacant Lot ,079 5, ,636 4, ,068 4, ,695 3, ,340 3, ,217 3, ,023 3, ,777 2, ,622 2, ,872 1, ,010 2, ,509 2, ,808 2, ,123 3, ,405 3, ,705 3, Sum Noise sensitive area: AR Vacant Lot ,155 3, ,719 2, ,122 2, ,857 1, ,717 1, ,068 2, ,711 1, ,264 1, ,412 1, ,843 2, ,372 2, ,299 2, ,763 2, ,106 3, To be continued on next page...

62 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 23 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page 15 3,024 3, ,303 3, Sum Noise sensitive area: AS Chair 1 1 3,439 3, ,003 3, ,461 2, ,074 2, ,692 1, ,556 1, ,353 1, ,154 1, ,448 1, ,112 1, ,553 1, ,914 1, ,006 2, ,315 2, Sum Noise sensitive area: AT Chair 2 1 4,446 4, ,013 4, ,476 3, ,088 3, ,700 2, ,486 2, ,338 2, ,170 2, ,962 1, ,148 1, ,196 1, ,702 1, ,994 2, ,312 2, ,592 2, ,891 2, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

63 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 24 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise sensitive area: AU Chair 3 1 4,713 4, ,278 4, ,735 3, ,349 3, ,966 2, ,764 2, ,611 2, ,428 2, ,230 2, ,308 1, ,446 1, ,972 1, ,246 2, ,554 2, ,853 2, ,148 3, Sum Noise sensitive area: AV Base 1 4,058 4, ,621 3, ,073 3, ,688 2, ,311 2, ,150 2, ,969 1, ,767 1, ,578 1, ,287 1, ,111 1, ,497 1, ,862 1, ,207 2, ,413 2, ,721 2, Sum Noise sensitive area: AW Nearest Run 1 3,191 3, ,760 2, ,236 2, ,844 1, ,447 1, ,273 1, ,086 1, To be continued on next page...

64 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 25 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Detailed results Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s...continued from previous page ,481 1, ,360 1, ,717 1, ,761 1, ,068 2, Sum Noise sensitive area: AX Vacant Lot 8 1 3,475 3, ,027 3, ,437 2, ,091 2, ,806 1, ,919 1, ,614 1, ,237 1, ,214 1, ,125 2, ,719 1, ,790 1, ,249 2, ,607 2, ,633 2, ,936 2, Sum WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

65 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 26 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Noise calculation model: ISO General Wind speed: 6.0 m/s Ground attenuation: General, Ground factor: 0.4 Meteorological coefficient, C0: 0.0 db Type of demand in calculation: 1: noise is compared to demand (DK, DE, SE, NL etc.) Noise values in calculation: All noise values are mean values (Lwa) (Normal) Pure tones: Pure and Impulse tone penalty are added to source noise Height above ground level, when no value in NSA object: 4.5 m Don't allow override of model height with height from NSA object Deviation from "official" noise demands. Negative is more restrictive, positive is less restrictive.: 0.0 db(a) Octave data required Air absorption ,000 2,000 4,000 8,000 [db/km] [db/km] [db/km] [db/km] [db/km] [db/km] [db/km] [db/km] : ENERCON E dBA !O! Noise: Runtime input Source Source/Date Creator Edited 12/30/1899 USER 12/30/ :00 AM Octave data Status Hub height Wind speed LwA,ref Pure tones [m] [m/s] [db(a)] [db] [db] [db] [db] [db] [db] [db] [db] User value No Generic data NSA: Noise sensitive point: (619)-A NSA: Noise sensitive point: (620)-B NSA: moved based on Google Earth imagery-c Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

66 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 27 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s NSA: Noise sensitive point: (622)-D NSA: Noise sensitive point: (623)-E NSA: Noise sensitive point: (624)-F NSA: modified based on Google Earth imagery-g Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: modified based on Google Earth imagery-h Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: modified based on Google Earth imagery-i Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: modified based on Google Earth imagery-j Noise demand: WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

67 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 28 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s 6.0 [m/s] 8.0 [m/s] 40.0 db(a) 43.0 db(a) NSA: modified based on Google Earth imagery-k Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: modified based on Google Earth imagery-l Noise demand: 6.0 [m/s] 8.0 [m/s] 40.0 db(a) 43.0 db(a) NSA: modified based on Google Earth imagery s1-m NSA: moved based on Google Earth imagery-n Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagery s2-o Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagery s3-p Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

68 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 29 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Sound level always accepted: 0.0 db(a) NSA: moved south based on Google Earth imagery s4-q Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagerys5 - moved again due to lot lines-r NSA: Noise sensitive point: User defined (555)-S Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagery-t Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagery-u Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: Noise sensitive point: (640)-V WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

69 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 30 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s NSA: Noise sensitive point: User defined (641)-W Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: moved based on Google Earth imagery-x Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: Vacant Lot 5-Y NSA: Vacant Lot 2-Z NSA: moved based on Google Earth imagery-aa NSA: moved based on Google Earth imagery-ab NSA: moved based on Google Earth imagery-ac NSA: added based on Google Earth imagery-ad WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

70 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 31 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: added based on Google Earth imagery-ae Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: added based on Google Earth imagery-af Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: added based on Google Earth imagery-ag Ambient noise: 0.0 db(a) Margin or Allowed additional exposure: 0.0 db(a) Sound level always accepted: 0.0 db(a) NSA: Vacant Lot 1-AH NSA: Vacant Lot 3-AI NSA: Vacant Lot 4-AJ WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

71 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 32 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s NSA: Vacant Lot 6-AK NSA: Vacant Lot 7-AL NSA: Vacant Lot 9-AM NSA: Vacant Lot 10-AN NSA: Vacant Lot 11-AO NSA: Vacant Lot 12-AP NSA: Vacant Lot 13-AQ NSA: Vacant Lot 14-AR WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

72 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 33 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Assumptions for noise calculation Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s NSA: Chair 1-AS Imission height(a.g.l.): 2.0 m Noise demand: 85.0 db(a) NSA: Chair 2-AT Imission height(a.g.l.): 2.0 m Noise demand: 85.0 db(a) NSA: Chair 3-AU Imission height(a.g.l.): 2.0 m Noise demand: 85.0 db(a) NSA: Base-AV Imission height(a.g.l.): 2.0 m Noise demand: 85.0 db(a) NSA: Nearest Run-AW Imission height(a.g.l.): 2.0 m Noise demand: 85.0 db(a) NSA: Vacant Lot 8-AX WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk

73 Project: Big Thunder Description: NSA locations updated, including vacant lots and ski hill locations. G=0.4. Noise level is db(a) db(a) WindPRO version Jan 2011 Printed/Page 4/25/2011 4:22 PM / 34 Licensed user: M.K. Ince & Associates Ltd. Wind Energy Engineering II Cross St. CA-DUNDAS, ON L9H 2R Adina Bogert-O'Brien / adina@mkince.ca Calculated: 4/25/2011 2:45 PM/ DECIBEL - Map 6.0 m/s Calculation: R E82.H98.16, G=0.4, db(a)noise calculation model: ISO General 6.0 m/s m Map: Site Plan Fig 2a , Print scale 1:50,000, Map center UTM NAD 83 Zone: 16 East: 325,257 North: 5,349,634 Noise calculation model: ISO General. New Noise sensitive area Height above sea level from active line object 35.0 db(a) 40.0 db(a) 45.0 db(a) 50.0 db(a) 55.0 db(a) WindPRO is developed by EMD International A/S, Niels Jernesvej 10, DK-9220 Aalborg Ø, Tlf , Fax , windpro@emd.dk