Transportation Noise Assessment Prince of Wales Residential Development Ottawa, Ontario

Transcription

1 Transportation Noise Assessment 1003 Prince of Wales Residential Development Ottawa, Ontario REPORT: GWE Traffic Noise Prepared For: Kent Bugatsch Inc. 63 Pamilla Street Ottawa, Ontario K1S 3K7 Prepared By: Thomas Couper, B.A.Sc., Project Manager Joshua Foster, P.Eng, Associate Gradient Wind Engineering Inc. Original: April 10, 2013 Revision 1: July 10, 2014 Revision 2: July 30, Walgreen Road, Ottawa, Ontario K0A 1L0 T (613) F (613)

2 EXECUTIVE SUMMARY This document describes a traffic noise assessment performed for a proposed residential development consisting of seven single-family homes in Ottawa, Ontario. The houses will rise approximately six meters above grade level. Figure 1 illustrates a site plan with surrounding context. The major sources of roadway noise affecting the development is traffic along Colonel By Drive and Prince of Wales Drive. The assessment is based on: (i) theoretical noise prediction methods that conform to the Ministry of the Environment (MOE) and City of Ottawa requirements; (ii) noise level criteria as specified by the City of Ottawa s Environmental Noise Control Guidelines (ENCG); (iii) future vehicular traffic volumes based on the City of Ottawa s Official Plan right of way allowances; and (iv) architectural drawings received from. The results of the current study indicate that noise levels due to roadway traffic over the site will range between 39 and 69 dba during the daytime period (07:00-23:00) and between 31 and 61 dba during the nighttime period (23:00-07:00). The highest traffic noise levels will occur along the west side of the development, nearest to Prince of Wales Drive. Minimum building construction in all areas is required to satisfy the Ontario Building Code (2012). In addition, the following Sound Transmission Class (STC) ratings are required for building components where noise levels exceed 65 dba at Unit #1 (see Figures 4 and 5). Living Room Windows (i) Living room windows facing west on Unit #1 will require a minimum STC of 27 (ii) Living room windows facing north on Unit #1 will require a minimum STC of 24 (iii) All other living room windows are to satisfy Ontario Building Code (OBC 2012) requirements Bedroom Windows (i) Bedroom windows facing west on Unit #1 will require a minimum STC of 32 (ii) Bedroom windows facing north on Unit #1 will require a minimum STC of 29 (iii) All other bedroom windows are to satisfy Ontario Building Code (OBC 2012) requirements 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment i

3 Exterior Walls (i) Exterior wall components on the north and west façades of Unit #1, closest to Prince of Wales Drive will require a minimum STC of 45 which will be achieved with brick cladding or an acoustical equivalent according to NRC test data 1 A review of window supplier literature indicates that the specified STC ratings can be achieved by a variety of window systems having a combination of glass thickness and inter-pane spacing. We have not specified any specific window configurations, as there are several manufacturers and various combinations of window components that will offer the necessary sound attenuation rating. However, it is the responsibility of the manufacturer to ensure that the specified window achieves the required STC. This can only be assured by using window configurations that have been certified by laboratory testing. The requirements for STC ratings assume that the remaining components of the building are constructed and installed according to the minimum standards of the Ontario Building Code. The specified STC requirements also apply to swinging and/or sliding patio doors. All specified building components will require review by a qualified acoustical engineer for conformance to the recommendations of this report prior to building permit application. Since noise levels exceed 65 dba at the plane of window on Unit #1, the installation of individual air conditioning will be required. The following Warning Clause (Type D 2 ) in all Agreements of Lease, Purchase and Sale will be required: This dwelling unit has been supplied with central air conditioning which will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the City of Ottawa s and the Ministry of the Environment s noise criteria. For all remaining units where noise levels at the plane of window are less than 65 dba, building components satisfying minimum OBC requirements will be sufficient. In addition, the installation of forced air heating with provisions for individual air conditioning in all remaining units will be required. 1 J.S. Bradley and J.A. Birta. Laboratory Measurements of the Sound Insulation of Building Façade Elements, National Research Council October MOE, LU-131 Noise Assessment in Land Use Planning, Tables 1 & 2, page Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment ii

4 The following Warning Clause (Type C 3 ) in all Agreements of Lease, Purchase and Sale will be required for all remaining units: This dwelling unit has been fitted with a forced air heating system and the ducting etc. was sized to accommodate central air conditioning. Installation of central air conditioning by the occupant will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the City of Ottawa s and the Ministry of the Environment s noise criteria. (Note: The location and installation of the outdoor air conditioning device should be done so as to comply with noise criteria of MOE Publication NPC-216, Residential Air Conditioning Devices and thus minimize the noise impacts both on and off the immediate vicinity of the subject property). Should the backyards be considered the primary outdoor amenity area, the noise levels at these areas are expected to approach 68 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 7 (Section 5), and illustrated in Figure 6. Noise levels at all outdoor receptors can be reduced to below 60 dba with the application of a noise barrier along the property line. Where mitigated noise levels could not be reduced from above 65 dba to 55 dba, a Warning Clause (Type B 4 ) is required for Unit #1: Purchasers/tenants are advised that despite the inclusion of noise control features in the development and within the building units, sound levels due to increasing (road) (Transitway) (rail) (air) traffic may on occasions interfere with some activities of the dwelling occupants as the sound levels exceed the City s and the Ministry of the Environment s noise criteria. Should the balconies be considered the primary outdoor amenity area, the noise levels at these areas are expected to approach 65 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 8 (Section 5), and illustrated in Figure 7. Noise levels at all outdoor receptors can be reduced to below 60 dba with the application of a 3 ibid 4 MOE Publication NPC Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment iii

5 noise barrier on the balcony. Although remaining noise levels are above 55 dba, it is economically not feasible to reduce to 55 dba. As such, Units #1-3 will require a Type B Warning Clause (see above), while Unit #4 will require a Type A Warning Clause: Purchasers/tenants are advised that sound levels due to increasing (road) (Transitway) (rail) (air) traffic may occasionally interfere with some activities of the dwelling occupants as the sound levels exceed the City s and the Ministry of the Environment s noise criteria. Additionally, the following restrictive covenant shall also be included in all Agreements of Lease, Purchase and Sale: The Transferee covenants with the Transferor that the above clause, verbatim, shall be included in all subsequent Agreements of Purchase and Sale and deeds conveying the lands described herein, which shall run with the said lands and is for the benefit of the subsequent owners of the said lands and the owner of the adjacent road Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment iv

6 TABLE OF CONTENTS PAGE 1. INTRODUCTION 1 2. TERMS OF REFERENCE 1 3. OBJECTIVES 1 4. METHODOLOGY Background Roadway Traffic Noise Criteria for Roadway Traffic Noise Roadway Traffic Volumes Theoretical Roadway Noise Predictions Indoor Noise Calculations 6 5. RESULTS AND DISCUSSION Roadway Noise Levels STC Requirements Noise Barrier Calculation At-Grade Amenity Area Balcony Amenity Area CONCLUSIONS AND RECOMMENDATIONS 12 FIGURES APPENDICES: Appendix A STAMSON 5.04 Input and Output Data 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment v

7 1. INTRODUCTION Gradient Wind Engineering Inc. (GWE), formerly Gradient Microclimate Engineering Inc. (GME), was retained by Inc. to undertake a transportation noise study of the proposed residential development at 1003 Prince of Wales Drive in Ottawa, Ontario. This report summarizes the methodology, results and recommendations related to a traffic noise assessment. GWE s scope of work involved assessing exterior and interior noise levels generated by local roadway traffic. The assessment was performed on the basis of theoretical noise calculation methods conforming to the City of Ottawa 5 and Ministry of the Environment 6 guidelines. Noise calculations were based on architectural drawings received from with future traffic volumes corresponding to the City of Ottawa s Official Plan (OP). 2. TERMS OF REFERENCE The focus of this environmental noise assessment is a proposed residential development consisting of seven single-family homes. The development is located 600 meters north of the intersection of Prince of Wales Drive and Baseline Road/Heron Road. The major sources of roadway noise are Colonel By Drive and Prince of Wales Drive. The site is surrounded by the Experimental Farm to the north and west, Rideau Canal to the east and residential housing to the south. Figure 1 illustrates a complete site plan with surrounding context. Upon completion, the houses will rise approximately eight meters above grade level. Detailed floor plans were not available at the time of this study. Each unit is provided a balcony and at-grade backyard amenity area. 3. OBJECTIVES The main goals of this work are to: (i) calculate the future noise levels on the study buildings produced by local roadway traffic and (ii) ensure that interior noise levels do not exceed the allowable limits specified by the City of Ottawa s Environmental Noise Control Guidelines as outlined in Sections 4.2 and 4.3 of this report. 5 City of Ottawa Environmental Noise Control Guidelines, SS Wilson Associates, May 10, MOE, LU-131 Noise Assessment in Land Use Planning, Tables 1 & 2, page Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 1

8 4. METHODOLOGY 4.1 Background Noise can be defined as any obtrusive sound. It is created at a source, transmitted through a medium, such as air, and intercepted by a receiver. Noise may be characterized in terms of the power of the source or the sound pressure at a specific distance. While the power of a source is characteristic of that particular source, the sound pressure depends on the location of the receiver and the path that the noise takes to reach the receiver. Measurement of noise is based on the decibel unit, dba, which is a logarithmic ratio referenced to a standard noise level ( Pascals). The A suffix refers to a weighting scale, which better represents how the noise is perceived by the human ear. With this scale, a doubling of power results in a 3 dba increase in measured noise levels and is just perceptible to most people. An increase of 10 dba is often perceived to be twice as loud. 4.2 Roadway Traffic Noise Criteria for Roadway Traffic Noise For vehicle traffic, the equivalent sound energy level, L EQ, provides a measure of the time varying noise levels, which is well correlated with the annoyance of sound. It is defined as the continuous sound level, which has the same energy as a time varying noise level over a period of time. For roadways, the L EQ is commonly calculated on the basis of a 16-hour (L EQ16 ) daytime (07:00-23:00) / 8-hour (L EQ8 ) nighttime (23:00-07:00) split to assess its impact on residential buildings. The Ministry of the Environment s document NPC-300 specifies that the recommended indoor noise limit ranges (that are relevant to this study) are 45 dba for living and dining areas and 40 dba for sleeping quarters of residences, as listed in Table 1. Based on GWE s experience, more comfortable indoor noise levels should be targeted toward 42 dba and 37 dba (for living rooms and bedrooms, respectively) to control peak noise and deficiencies in building envelope construction Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 2

9 TABLE 1: INDOOR SOUND LEVEL LIMITS (ROAD & RAIL) Type of Space Living/dining/den areas of residences, hospitals, nursing homes, schools, daycare centres, etc. Living/dining/den areas of residences, hospitals, nursing homes, etc. (except schools or daycare centres) Sleeping quarters Time Period L EQ (dba) Road Rail 07:00 23: :00 07: :00 23: :00 07: Predicted noise levels at the plane of window (POW) and outdoor living area (OLA) dictate the action required to achieve the recommended sound levels. When noise levels at these areas exceed the criteria outlined in Table 2, specific outdoor, ventilation and warning clause requirements may apply. In addition, when noise levels exceed the criteria outlined in Table 3, upgraded building components must be designed Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 3

10 TABLE 2: ROAD & RAIL NOISE COMBINED OUTDOOR, VENTILATION AND WARNING CLAUSE REQUIREMENTS Time Period L EQ (dba) Ventilation Requirements Outdoor Noise Control Measures Warning Clause Outdoor Living Area (OLA) L EQ(16hr) < 55 N/A Not required Not required Daytime (07:00 23:00) 55 < L EQ(16hr) 60 N/A L EQ(16hr) > 60 N/A May be applied to reduce the sound level to 55 dba Should be implemented to reduce the sound level to 55 dba Type A Type B Plane of Window (POW) L EQ(16hr) < 55 Not required N/A Not required Daytime (07:00 23:00) 55 < L EQ(16hr) 65 Forced air heating with provision for central air conditioning N/A Type C L EQ(16hr) > 65 Central air conditioning N/A Type D L EQ(8hr) < 50 Not required N/A Not required Nighttime (23:00 07:00) 50 < L EQ(8hr) 60 Forced air heating with provision for central air conditioning N/A Type C L EQ(8hr) > 60 Central air conditioning N/A Type D - If noise control measures are not provided - If it s not feasible for administrative, economic or technical reasons and the sound level does not exceed 60 dba TABLE 3: ROAD & RAIL NOISE BUILDING COMPONENT REQUIREMENTS Source L EQ (dba) Building Component Requirements Road Rail L EQ(16hr) > 65 (Daytime) L EQ(8hr) > 60 (Nighttime) L EQ(16hr) > 60 (Daytime) L EQ(8hr) > 55(Nighttime) Building components (walls, windows, etc.) must be designed to achieve indoor sound level criteria 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 4

11 4.2.2 Roadway Traffic Volumes For future traffic noise predictions, the MOE document NPC-300 requires the use of the Annual Average Daily Traffic (AADT) volumes, projected to exist ten years into the future, with an average annual growth rate of 2% per year. In contrast, the City of Ottawa s Official Plan (OP) requires that the AADT volumes should be based on roadway allowances, which are defined by the Right of Way (ROW) protection values identified in the OP for specific roadways. To ensure compliance with the reasonable worst-case situation, the following steps were taken; Recent counted traffic data were acquired from the City of Ottawa and the Ministry of Transportation, upon which a growth rate of 2% per year was applied and extrapolated ten years in the future to the future. Traffic volumes based on roadway ROW values were obtained from the City of Ottawa Official Plan 7 (Annex 1 Road Classification and Rights of Way). For roadways where the ROW information was unavailable, the designation was assumed based on the size of the existing road and available traffic information In all cases, the higher of the OP versus projected values were used to calculate future noise levels. Table 4 summarizes the AADT values used for each roadway included in this assessment. TABLE 4: ROADWAY TRAFFIC DATA Roadway Roadway Class Speed Limit (km/h) Official Plan AADT Available Traffic AADT From Count Year of Traffic AADT Projected 2023 AADT Colonel By Drive Federal 60 N/A 15, ,814 Prince of Wales Drive 4-UAU 60 30,000 N/A N/A N/A - Traffic volumes taken from Ministry of Transportation Theoretical Roadway Noise Predictions Noise predictions were performed with the aid of the Ministry of the Environment (MOE) computerized noise assessment program, STAMSON 5.04, for road and rail analysis. Appendix A includes the STAMSON 5.04 input and output data Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 5

12 Roadway noise calculations were performed by treating each road segment as separate line sources of noise, and by using existing building locations as noise barriers. The surrounding building massing, roadway layout geometry and site plan information was received from Barry J. Hobin & Associates Architects. In addition to the traffic volumes summarized in Table 4, theoretical noise predictions were based on the following parameters: Truck traffic on all roadways was taken to comprise 5% heavy trucks and 7% medium trucks, as per ENCG requirements for noise level predictions The day/night split was taken to be 92% / 8% respectively for all streets Absorptive and reflective intermediate ground surfaces based on specific source-receiver path ground characteristics The study site was treated as having flat topography Noise receptors were strategically placed at 17 locations around the study area (see Figures 2 and 3). 4.3 Indoor Noise Calculations The difference between outdoor and indoor noise levels is the noise attenuation provided by the building envelope. According to common industry practice, complete walls and individual wall elements are rated according to the Sound Transmission Class (STC). The STC ratings of common residential walls built in conformance with the Ontario Building Code (2012) typically exceed STC 35, depending on exterior cladding, thickness and interior finish details. For example, brick veneered walls can achieve STC 55. Standard good quality double-glazed non-operable windows can have STC ratings ranging from 25 to 40 depending on the window manufacturer, pane thickness and inter-pane spacing. As previously mentioned, the windows are the known weak point in a partition. According to NPC-300, when daytime noise levels (from road and rail sources) at the plane of the window exceed 65 dba, calculations must be performed to evaluate the sound transmission quality of the building components to ensure acceptable indoor noise levels. The calculation procedure considers: Window type and total area as a percentage of total room floor area Exterior wall type and total area as a percentage of the total room floor area Acoustic absorption characteristics of the room Outdoor noise source type and approach geometry Indoor sound level criteria, which varies according to the intended use of a space 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 6

13 Based on published research, exterior walls possess specific sound attenuation characteristics that are used as a basis for calculating the required STC ratings of windows in the same partition. Due to the limited information available at the time of the study, which was prepared for site plan approval, detailed floor layouts and building elevations have not been finalized; therefore, detailed STC calculations could not be performed at this time. As a guideline, the anticipated STC requirements for windows have been estimated based on the overall noise reduction required for each intended use of space (STC = outdoor noise level targeted indoor noise levels). 5. RESULTS AND DISCUSSION 5.1 Roadway Noise Levels Appendix A contains the complete set of input and output data from all STAMSON 5.04 calculations. The results of the roadway noise calculations are summarized in Table 5 below. TABLE 5: EXTERIOR NOISE LEVELS DUE TO ROAD TRAFFIC Receptor Number Receptor Location Noise Level (dba) Day Night 1 POW Unit #1 North Façade POW Unit #2 North Façade POW Unit #4 North Façade POW Unit #7 West Façade POW Unit #6 East Façade POW Unit #5 West Façade POW Unit #4 South Façade POW Unit #1 South Façade POW Unit #1 West Façade OLA Unit #1 North Side OLA Unit #2 North Side OLA Unit #4 North Side OLA Unit #7 East Side OLA Unit #1 Balcony Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 7

14 TABLE 5: EXTERIOR NOISE LEVELS DUE TO ROAD TRAFFIC (CONT D) Receptor Number Receptor Location Noise Level (dba) Day Night 15 OLA Unit #2 Balcony OLA Unit #3 Balcony OLA Unit #4 Balcony The results of the current analysis indicate that noise levels will range between 39 and 69 dba during the daytime period (07:00-23:00) and between 31 and 61 dba during the nighttime period (23:00-07:00). The highest noise level (i.e. 69 dba) occurs on the west side of Unit #1, which is closest to Prince of Wales Drive. 5.2 STC Requirements The noise levels predicted due to road traffic exceed the criteria listed in Table 1.8 of the ENCG for building components. As discussed in Section 4.3 the anticipated STC requirements for windows have been estimated based on the overall noise reduction required for each intended use of space (STC = outdoor noise level targeted indoor noise levels). As per city of Ottawa requirements, detailed STC calculations will be required to be completed prior to building permit application for each unit type. The STC requirements for the windows are summarised below for Unit #1 where noise levels exceed the ENCG criteria of 65 dba (see Figures 4 and 5): Living Room Windows (i) Living room windows facing west on Unit #1 will require a minimum STC of 27 (ii) Living room windows facing north on Unit #1 will require a minimum STC of 24 (iii) All other living room windows are to satisfy Ontario Building Code (OBC 2012) requirements Bedroom Windows (i) Bedroom windows facing west on Unit #1 will require a minimum STC of 32 (ii) Bedroom windows facing north on Unit #1 will require a minimum STC of 29 (iii) All other bedroom windows are to satisfy Ontario Building Code (OBC 2012) requirements 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 8

15 Exterior Walls (i) Exterior wall components on the north and west façades of Unit #1, closest to Prince of Wales Drive will require a minimum STC of 45 which will be achieved with brick cladding or an acoustical equivalent according to NRC test data 8 A review of window supplier literature indicates that these levels can be achieved by a variety of window systems having a combination of glass thickness and inter-pane spacing. We have not specified any specific window configuration, as there are several manufacturers and various combinations of window components that will offer the necessary sound attenuation rating. Results of the calculations also indicate Unit #1 will require central air conditioning, or similar mechanical ventilation, which will allow occupants to keep windows closed and maintain a comfortable living environment. All remaining units within the development will require forced ait heating with provisions for central air conditioning. In addition to ventilation requirements, Warning Clauses will also be required be placed on all Lease, Purchase and Sale Agreements, as summarized in Table 6 below. TABLE 6: SITE VENTILATION AND WARNING CLAUSE REQUIREMENTS Location Unit #1 Unit #2-7 Ventilation Requirement Individual Air Conditioning Forced Air Heating with Provisions for Individual Air Conditioning Warning Clause Type D Type C 5.3 Noise Barrier Calculation Units 1 through 4 are provided two outdoor amenity areas, one at grade and a balcony. In the case where one of these areas is designated the primary amenity area, two separate noise barrier calculations were completed, and presented below. 8 J.S. Bradley and J.A. Birta. Laboratory Measurements of the Sound Insulation of Building Façade Elements, National Research Council October Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 9

16 5.3.1 At-Grade Amenity Area Noise levels at the backyards are expected to approach 68 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 7 below, and illustrated in Figure 6. Noise levels at all outdoor receptors can be reduced to below 60 dba. Where mitigated noise levels could not be reduced from above 65 dba to 55 dba, a Warning Clause (Type B 9 ) is required. TABLE 7: RESULTS OF BARRIER INVESTIGATION AT-GRADE AMENITY AREA Receptor Number Location Barrier Height (m) Daytime L EQ Noise Levels (dba) Without Barrier With Barrier Warning Clause 10 Unit # Type B 11 Units #2, # N/A 12 Unit # N/A Balcony Amenity Area Noise levels on the balconies are expected to approach 65 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 8 below, and illustrated in Figure 7. Noise levels at all outdoor receptors can be reduced to below 60 dba. Where mitigated noise levels could not be reduced from above 65 dba to 55 dba, a Warning Clause (Type B 10 ) is required. 9 MOE Publication NPC ibid 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 10

17 TABLE 8: RESULTS OF BARRIER INVESTIGATION BALCONY AMENITY AREA Receptor Number Location Barrier Height (m) Daytime L EQ Noise Levels (dba) Without Barrier With Barrier Warning Clause 14 Unit # Type B 15 Unit # Type B 16 Unit # Type B 17 Unit # Type A 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 11

18 7. CONCLUSIONS AND RECOMMENDATIONS The results of the current study indicate that noise levels due to roadway traffic over the site will range between 39 and 69 dba during the daytime period (07:00-23:00) and between 31 and 61 dba during the nighttime period (23:00-07:00). The highest traffic noise levels will occur along the west side of the development, nearest to Prince of Wales Drive. Minimum building construction in all areas is required to satisfy the Ontario Building Code (2012). In addition, the following Sound Transmission Class (STC) ratings are required for building components where noise levels exceed 65 dba at Unit #1 (see Figures 4 and 5). Living Room Windows (i) Living room windows facing west on Unit #1 will require a minimum STC of 27 (ii) Living room windows facing north on Unit #1 will require a minimum STC of 24 (iii) All other living room windows are to satisfy Ontario Building Code (OBC 2012) requirements Bedroom Windows (i) Bedroom windows facing west on Unit #1 will require a minimum STC of 32 (ii) Bedroom windows facing north on Unit #1 will require a minimum STC of 29 (iii) All other bedroom windows are to satisfy Ontario Building Code (OBC 2012) requirements (i) Exterior Walls Exterior wall components on the north and west façades of Unit #1, closest to Prince of Wales Drive will require a minimum STC of 45 which will be achieved with brick cladding or an acoustical equivalent according to NRC test data 11 A review of window supplier literature indicates that the specified STC ratings can be achieved by a variety of window systems having a combination of glass thickness and inter-pane spacing. We have not specified any specific window configurations, as there are several manufacturers and various combinations of window components that will offer the necessary sound attenuation rating. However, it is the responsibility of the manufacturer to ensure that the specified window achieves the required STC. This can only be assured by using window configurations that have been certified by laboratory testing. The requirements for STC ratings assume that the remaining components of the building are constructed and installed according to the minimum standards of the Ontario Building Code. The specified STC requirements also apply to swinging and/or sliding patio doors. All specified building 11 J.S. Bradley and J.A. Birta. Laboratory Measurements of the Sound Insulation of Building Façade Elements, National Research Council October Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 12

19 components will require review by a qualified acoustical engineer for conformance to the recommendations of this report prior to building permit application. Since noise levels exceed 65 dba at the plane of window on Unit #1, the installation of individual air conditioning will be required. The following Warning Clause (Type D 12 ) in all Agreements of Lease, Purchase and Sale will be required for all units: This dwelling unit has been supplied with central air conditioning which will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the City of Ottawa s and the Ministry of the Environment s noise criteria. For all remaining units where noise levels at the plane of window are less than 65 dba, building components satisfying minimum OBC requirements will be sufficient. In addition the installation of forced air heating with provisions for individual air conditioning in all remaining units will be required. The following Warning Clause (Type C 13 ) in all Agreements of Lease, Purchase and Sale will be required: This dwelling unit has been fitted with a forced air heating system and the ducting etc. was sized to accommodate central air conditioning. Installation of central air conditioning by the occupant will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the City of Ottawa s and the Ministry of the Environment s noise criteria. (Note: The location and installation of the outdoor air conditioning device should be done so as to comply with noise criteria of MOE Publication NPC-216, Residential Air Conditioning Devices and thus minimize the noise impacts both on and off the immediate vicinity of the subject property). Should the backyards be considered the primary outdoor amenity area, the noise levels at these areas are expected to approach 68 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 7 (Section 5), and illustrated in Figure 6. Noise levels at all outdoor receptors can be reduced to below 60 dba with the application of a 12 MOE LU-131 Noise Assessment In Land Use Planning, Tables 1 & 2, page 8 13 ibid 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 13

20 noise barrier on the property line. Where mitigated noise levels could not be reduced from above 65 dba to 55 dba, a Warning Clause (Type B 14 ) is required for Unit #1: Purchasers/tenants are advised that despite the inclusion of noise control features in the development and within the building units, sound levels due to increasing (road) (Transitway) (rail) (air) traffic may on occasions interfere with some activities of the dwelling occupants as the sound levels exceed the City s and the Ministry of the Environment s noise criteria. Should the balconies be considered the primary outdoor amenity area, the noise levels at these areas are expected to approach 65 dba during the daytime period. According to ENCG, if these areas are to be used as outdoor living spaces, noise control measures should be implemented to reduce noise levels to 55 dba. The results of the barrier investigation are summarized in Table 8 (Section 5), and illustrated in Figure 7. Noise levels at all outdoor receptors can be reduced to below 60 dba with the application of a noise barrier on the balcony. Although remaining noise levels are above 55 dba, it is economically not feasible to reduce to 55 dba. As such, Units #1-3 will require a Type B Warning Clause (see above) while Unit #4 will require a Type A Warning Clause: Purchasers/tenants are advised that sound levels due to increasing (road) (Transitway) (rail) (air) traffic may occasionally interfere with some activities of the dwelling occupants as the sound levels exceed the City s and the Ministry of the Environment s noise criteria. Additionally, the following restrictive covenant shall also be included in all Agreements of Lease, Purchase and Sale: The Transferee covenants with the Transferor that the above clause, verbatim, shall be included in all subsequent Agreements of Purchase and Sale and deeds conveying the lands described herein, which shall run with the said lands and is for the benefit of the subsequent owners of the said lands and the owner of the adjacent road. 14 MOE Publication NPC Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment Page 14

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29 APPENDIX A STAMSON 5.04 INPUT AND OUTPUT DATA 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 1

30 STAMSON 5.0 NORMAL REPORT Date: :47:09 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: POR1.te Description: Time Period: Day/Night 16/8 hours Road data, segment # 1: CBY (day/night) - Car traffic volume : 20089/1747 veh/timeperiod * Medium truck volume : 1598/139 veh/timeperiod * Heavy truck volume : 1141/99 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: CBY (day/night) - Angle1 Angle2 : deg 0.00 deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 2

31 Road data, segment # 2: POW 1 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 2: POW 1 (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 3

32 Road data, segment # 3: POW 2 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 3: POW 2 (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Results segment # 1: CBY (day) ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 1 (day) 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 4

33 ROAD ( ) = dba Segment Leq : dba Results segment # 3: POW 2 (day) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba Results segment # 1: CBY (night) Source height = 1.49 m ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 1 (night) ROAD ( ) = dba 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 5

34 Segment Leq : dba Results segment # 3: POW 2 (night) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba TOTAL Leq FROM ALL SOURCES (DAY): (NIGHT): Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 6

35 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 7

36 STAMSON 5.0 NORMAL REPORT Date: :47:17 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: POR2.te Description: Time Period: Day/Night 16/8 hours Road data, segment # 1: POW (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: POW (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 8

37 Road data, segment # 2: CBY (day/night) - Car traffic volume : 20089/1747 veh/timeperiod * Medium truck volume : 1598/139 veh/timeperiod * Heavy truck volume : 1141/99 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 2: CBY (day/night) - Angle1 Angle2 : deg 0.00 deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 9

38 Results segment # 1: POW (day) ROAD ( ) = dba Segment Leq : dba Results segment # 2: CBY (day) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba Results segment # 1: POW (night) ROAD ( ) = dba Segment Leq : dba 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 10

39 Results segment # 2: CBY (night) Source height = 1.49 m ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba TOTAL Leq FROM ALL SOURCES (DAY): (NIGHT): Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 11

40 STAMSON 5.0 NORMAL REPORT Date: :47:35 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: POR3.te Description: Time Period: Day/Night 16/8 hours Road data, segment # 1: CBY (day/night) - Car traffic volume : 20089/1747 veh/timeperiod * Medium truck volume : 1598/139 veh/timeperiod * Heavy truck volume : 1141/99 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: CBY (day/night) - Angle1 Angle2 : deg 0.00 deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 12

41 Road data, segment # 2: POW 1 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 2: POW 1 (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 13

42 Road data, segment # 3: POW 2 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 3: POW 2 (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Results segment # 1: CBY (day) ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 1 (day) ROAD ( ) = dba 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 14

43 Segment Leq : dba Results segment # 3: POW 2 (day) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba Results segment # 1: CBY (night) Source height = 1.49 m ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 1 (night) 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 15

44 ROAD ( ) = dba Segment Leq : dba Results segment # 3: POW 2 (night) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba TOTAL Leq FROM ALL SOURCES (DAY): (NIGHT): Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 16

45 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 17

46 STAMSON 5.0 NORMAL REPORT Date: :47:44 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: POR4.te Description: Time Period: Day/Night 16/8 hours Road data, segment # 1: POW 1 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: POW 1 (day/night) - Angle1 Angle2 : deg 6.00 deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 2 (Flat/gentle slope; with barrier) Barrier angle1 : deg Angle2 : deg Barrier height : 6.00 m Barrier receiver distance : / m Source elevation : 0.00 m Receiver elevation : 0.00 m Barrier elevation : 0.00 m Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 18

47 Road data, segment # 2: POW 2 (day/night) - Car traffic volume : 24288/2112 veh/timeperiod * Medium truck volume : 1932/168 veh/timeperiod * Heavy truck volume : 1380/120 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 2: POW 2 (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 19

48 Results segment # 1: POW 1 (day) Barrier height for grazing incidence Source! Receiver! Barrier! Elevation of Height (m)! Height (m)! Height (m)! Barrier Top (m) ! 4.50! 2.41! 2.41 ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 2 (day) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba 1003 Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 20

49 Results segment # 1: POW 1 (night) Barrier height for grazing incidence Source! Receiver! Barrier! Elevation of Height (m)! Height (m)! Height (m)! Barrier Top (m) ! 4.50! 2.41! 2.41 ROAD ( ) = dba Segment Leq : dba Results segment # 2: POW 2 (night) ROAD ( ) = dba Segment Leq : dba Total Leq All Segments: dba TOTAL Leq FROM ALL SOURCES (DAY): (NIGHT): Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 21

50 STAMSON 5.0 NORMAL REPORT Date: :47:51 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: POR5.te Description: Time Period: Day/Night 16/8 hours Road data, segment # 1: CBY (day/night) - Car traffic volume : 20089/1747 veh/timeperiod * Medium truck volume : 1598/139 veh/timeperiod * Heavy truck volume : 1141/99 veh/timeperiod * Posted speed limit : 60 km/h Road gradient : 0 % Road pavement : 1 (Typical asphalt or concrete) * Refers to calculated road volumes based on the following input: 24 hr Traffic Volume (AADT or SADT): Percentage of Annual Growth : 0.00 Number of Years of Growth : 0.00 Medium Truck % of Total Volume : 7.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: CBY (day/night) - Angle1 Angle2 : deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : 4.50 / 4.50 m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : Prince of Wales Drive, Ottawa, Ontario: Traffic Noise Assessment A 22