DETAILED NOISE CONTROL STUDY PROPOSED TOWNHOUSE AND APARTMENT BUILDINGS BRONTE ROAD DEVELOPMENT TOWN OF OAKVILLE

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1 SS WILSON ASSOCIATES Consulting Engineers REPORT NO. WA10-93 REVISION 3 DETAILED NOISE CONTROL STUDY PROPOSED TOWNHOUSE AND APARTMENT BUILDINGS BRONTE ROAD DEVELOPMENT TOWN OF OAKVILLE SUBMITTED TO: BALLANTRY HOMES 20 CACHET WOODS COURT, SUITE 6 MARKHAM, ONTARIO L6C 3G1 PREPARED BY: YUTONG GU, B.A.SC., E.I.T. GRADUATE ENGINEER REVIEWED BY: HAZEM GIDAMY, P.ENG. PRINCIPAL APRIL 10, 2014 SSWA INC. 15 Wertheim Court, Suite 211, Richmond Hill, Ontario, L4B 3H7 Tel: (905) info@sswilsonassociates.com &

2 DETAILED NOISE CONTROL STUDY PROPOSED TOWNHOUSE AND APARTMENT BUILDINGS BRONTE ROAD DEVELOPMENT TOWN OF OAKVILLE INDEX PAGE 1.0 INTRODUCTION SUMMARY AND RECOMMENDATIONS SOUND LEVEL CRITERIA ANALYSIS 9 TABLES FIGURES APPENDIX A: ROAD TRAFFIC DATA APPENDIX B: SAMPLE SOUND LEVEL CALCULATIONS

3 1.0 INTRODUCTION 1.1 The services of this firm were retained by Ballantry Homes to prepare a Detailed Noise Control Study for the proposed development referred to as Bronte Road Development located in the Town of Oakville, Regional Municipality of Halton. The objective of this Report is to support an application for Site Plan Approval of the proposed development. 1.2 The site is bounded by the following land uses: - to the north by existing residential and Pine Glen Road - to the south by Khalsa Gate - to the east by Khalsa Gate - to the west by Bronte Road The location of the site is shown in Figure Major features of the development are defined by the proposed Site Plan drawing prepared by Gabriel Bodor Architect Inc. Project No Drawing No. A101 dated February 21, Figure 2 illustrates the general layout of the proposed development. The proposed development consists of a group of stacked townhouses and an apartment building. The outdoor living areas of concern for the proposed townhouses are the balconies and ground floor terraces (with direct access to the outside). For the proposed apartment building, there are balconies including ground floor balconies on both sides of the building. Based on the submitted project drawings, there are no common outdoor living areas except for landscaping areas which are not considered to be noise sensitive area. 1.4 Major noise sources (current and future) impacting the development include: 1. Bronte Road 2. Khalsa Gate The proposed development is located outside the 25 NEF/NEP contour lines prepared by Transport Canada; therefore aircraft noise is not considered a problem. 1.5 The scope of this report is to define the minimum noise attenuation requirements for the control of outdoor and indoor environmental sound levels. 1

4 1.6 Revision 1 takes into account the new Site Plan as well as the new lot numbering system. Tables were also revised to include the Region of Halton s comments regarding documentation of the noise levels for those units adjacent to Bronte Road. 1.7 Revision 2 is based on the Region of Halton s comments dated January 17, 2012 and additional comments dated February 2, 2012 regarding the Common Outdoor Living Area and the individual amenities areas. 1.8 Revision 3 addresses the new revised site plan dated February 21, 2014, which included changes to the locations of townhouse units as well as additional land and an apartment building to the southwest. 2

5 2.0 SUMMARY AND RECOMMENDATIONS 2.1 SUMMARY Based on the analysis conducted in this investigation it is concluded that: 1. The sound levels in the Apartment Building balconies facing Bronte Road and Khalsa Gate are relatively high, however, since the balconies will not be considered as OLAs, there is no need to consider any noise mitigation outdoors and that a warning clause to this effect will suffice. 2. The sound levels at Townhouse A and B north facing terraces as well as Townhouse C and D south facing terraces are relatively high, however, since the outdoor area will not be used for any recreational purposes by design and alternative OLAs are provided, therefore there is no need to consider any noise mitigation outdoors. 3. The unattenuated sound levels at the outside walls of all the units will exceed the recommended objective sound levels. Indoor noise controls are required for these units along with relevant warning clauses. 4. Although the projected sound levels are predicted to be above the sound level criteria outlined in Section 3, it is feasible to control sound levels within the outdoor and indoor areas of the proposed development to meet the stated criteria. 2.2 RECOMMENDATIONS A summary of the minimum noise attenuation requirements is presented in Table 1. Detailed description is as follows: 1. Air Conditioning All Townhouse Buildings The above noted properties shall be equipped with central air conditioning systems with their condensing units to be located in noise insensitive locations. The sound levels of the condensing units shall meet the MOE's maximum Sound Rating number as well as the maximum sound level at the points of reception outlined in publication NPC-216 and other levels specified by the municipality. The following warning clause shall be registered in all Development Agreement(s) and Offers of Sale and Purchase or Lease of these properties: 3

6 In order to achieve a suitable indoor noise environment, windows may have to remain closed; therefore this dwelling unit has been equipped with a central air conditioning system. Apartment Building The proposed apartment building shall be equipped with central air conditioning. The air conditioning system may be central to the entire building or may be central to each dwelling unit (for example using split-system or packaged incremental units with suitable duct work to all rooms). The Ministry of Environment does not accept window-type air conditioning units in lieu of a central system. In all cases, serious attention shall be given by the proponent, the Mechanical Consultant and the Contractor to the noise potential of the air conditioning system as it may affect the outdoor and indoor receivers within or outside of the proposed development. It is important that the Builder, the Mechanical Consultant and the Contractor achieve the MOE objectives included in their Publications NPC-300 and NPC-216. The following warning clause shall be registered in all Development Agreement(s) and Offers of Sale and Purchase or Lease of these properties: In order to achieve a suitable indoor noise environment, windows may have to remain closed, therefore this dwelling unit has been equipped with a central air conditioning system. It is also our recommendation that the necessary detailed technical analysis be performed prior to submitting an application for Building Permit to optimize the required air conditioning unit Sound Rating number in order to meet the Provincial sound level standards at the closest receptors after taking into consideration the specific property design and proposed a/c unit location. Other a/c noise control measures, where required to meet the sound level criteria at the point(s) of reception, shall also be identified and shown on the applicable permit drawings/specifications. The Analysis Section in this study provides additional important details on the application of air conditioners. 2. Warning Clause *1 All Townhouse Buildings and Apartment Building *1 Reference should be made to Bulletin No , Environmental Warnings/Restrictions, Ontario Ministry of Consumer and Commercial Relations. 4

7 The following warning clause shall be registered in all Development Agreement(s) and Offers of Sale and Purchase or Lease of these properties: Purchasers/tenants are advised that despite the inclusion of noise control features within this development area and within the building units, sound levels from increasing road traffic on Bronte Road and Khalsa Gate may continue to be of concern, occasionally interfering with some activities of the dwelling occupants as the sound level exceeds the Municipality's and the Ministry of Environment's noise criteria. All Apartment Building Units with Balconies The following warning clause shall be registered in all Development Agreements and Offers of Sale and Purchase or Lease of these properties having a balcony: Purchasers/tenants are advised that despite the inclusion of noise control features within this development and within the building units, sound levels from increasing road traffic on Bronte Road and Khalsa Gate will continue to be of concern as the levels in the balcony exceed the Ministry of Environment criteria. 4. Building Acoustic Insulation Townhouse Building C, D and Apartment Building All exterior building components (walls, windows and doors) shall meet the minimum Acoustic Insulation Factors (AIF) shown in Table(s) 3 and 4. All windows should be well fitted and weather-stripped. It is also the responsibility of the developer/builder responsible for final design and construction of the subject dwellings to ensure that the correct windows, walls and doors acoustic specifications are secured from the Acoustic Consultant prior to planning and construction of the noted buildings. It is also the responsibility of the developer/builder responsible for final design and construction of the subject dwellings to ensure that the correct windows, walls and doors acoustic specifications are secured from the Acoustic Consultant prior to planning and construction of the noted buildings. 7. Implementation Procedures Prior to the issuance of building permits, the Builder's plans with respect to the units requiring noise control measures as referred to earlier shall be certified by an Acoustical Consultant as being in conformance with the recommendations of the Detailed Noise Control Study as approved and/or amended by the authorities having jurisdiction. 5

8 Prior to their final inspection and release for occupancy, these dwellings shall be certified by an Acoustical Consultant as being in compliance with the recommendations of the Detailed Noise Control Study. In view of the fact that municipal implementation procedures of the noise control measures specified herein may differ, it is also the responsibility of the developer/builder responsible for final design and construction of the subject structures/dwellings to ensure that the correct details related to the noise control measures referred in this report (such as sound barrier(s), building shell component specifications (windows, walls, doors and others), air conditioning, etc) are secured from the Acoustic Consultant prior to planning and construction of the noted building(s). 6

9 3.0 SOUND LEVEL CRITERIA 3.1 SURFACE TRANSPORTATION CRITERIA The surface transportation noise is based on the objective sound levels recommended by the Ontario Ministry of Environment (Ref.: MOE Publication NPC-300 Environmental Noise Guideline, Noise Assessment Criteria for Stationary Sources and for Land Use Planning, 2013 ), and applicable Regional/Municipal noise level standards and procedures for different land uses and spaces. The following is a summary of the applicable sound level criteria for surface transportation sources: MOE Sound Level Limits for Outdoor Living Areas (OLA) AREA & TIME PERIOD Individual or Common Outdoor Living Areas (16 hr, 07:00-23:00) L eq (16) ROAD AND RAIL (dba) 55 MOE Indoor Sound Level Limits Type of Space Living/dining, den areas of residences, hospitals, nursing homes, schools, daycare centres, etc. (Time period: 16 hr, 07:00-23:00) Living/dining, den areas of residences, hospitals. nursing homes, etc. (except schools or daycare centres) (Time period: 8 hr, 23:00-07:00) Sleeping quarters (Time period: 16 hr, 07:00-23:00) Sleeping quarters (Time period: 8 hr, 23:00-07:00) L eq (Time Period) (dba) Road Rail

10 The criteria for acceptable outdoor and indoor sound levels are based on free-field predicted and/or measured sound levels at the applicable receiver locations, thus the effects of sound reflections and reverberant sound fields are not considered. If the sound level is less than or equal to the sound level criteria, no control measures will be required. The outdoor sound levels may exceed the outdoor sound level criterion by up to 5 decibels, provided that it can be demonstrated that it is not technically, economically or administratively feasible to achieve the criterion and that the occupants are informed of a potential disturbance due to the excess noise by means of a warning clause or cautionary note to be registered in all Development Agreement(s) and Offers of Sale and Purchase or Lease. Central air conditioning is required when the nighttime sound level at the outside wall of the sleeping quarters or bedrooms is equal to or exceeds Leq8hrs. 60 dba or when the daytime sound level at the outside wall of the Living/Dining/ Recreation space is equal to or exceeds Leq16hrs. 65 dba. If the nighttime sound level at the outside wall exceeds Leq8hrs. 50 dba but is less than 60 dba, or if the daytime sound level at the outside wall exceeds 55 dba but is less than Leq16hrs. 65 dba, then forced air heating with provision for future installation of central air conditioning is required. 8

11 4.0 ANALYSIS 4.1 TRANSPORTATION SOURCES OF NOISE The proposed development is located north of Bronte Road in the Town of Oakville, Ontario as shown in Figure 1. The relevant road and traffic data were obtained from Ballantry Homes and are summarized below: Bronte Road Current No. of Lanes 4 Posted Speed Limit 60 km/hr. - Ultimate AADT 35,000 vpd Total Truck Percentage 13% - Medium Truck Split 8% - Heavy Truck Split 5% Day(16 hrs.)/night(8 hrs.) Split 85%/15% Directional Traffic Split (assumed) 50%/50% Road Gradient (assumed) 2% Khalsa Gate Current No. of Lanes 2 Posted Speed Limit 60 km/hr. - Ultimate AADT 4,470 vpd Total Truck Percentage 4% - Medium Truck Split 2% - Heavy Truck Split 2% Day(16 hrs.)/night(8 hrs.) Split 90%/10% Directional Traffic Split (assumed) 50%/50% Road Gradient (assumed) 2% Appendix A contains the relevant road traffic data used in this study. 4.2 OUTDOOR NOISE ENVIRONMENT Noise predictions were carried out using STAMSON Version 5.04 (2000), the computerized version of the MOE noise prediction models, ORNAMENT and/or STEAM. Overall sound levels at the OLA's of the selected representative receptor locations are shown in Table 2. 9

12 The analysis demonstrated that the established sound levels in the Outdoor Living Areas during the daytime where the apartment building's balconies may exist are likely to exceed the MOE OLA's criteria. Based on the MOE guidelines, the balconies for the proposed development are not considered as OLA's due to the depth of the balcony is less than 4 m. In regards to the proposed apartment building ground floor balconies, we have been advised by the project consultant that those areas are designed as balconies with installation of railing system and are less than 4m deep. No physical mitigation measures are, therefore required for the apartment building balconies and a warning clause registered in the Development Agreement will suffice. Figures 3, 4 and 5 show the ground floor plan, second floor plan and elevation of the apartment building. In regards to the proposed townhouse terraces that face the road, we have been advised by the project consultant that those areas are designed as the entrance to such suites and that the individual lot areas within the front are not the formal Outdoor Living Areas. Instead, the project s OLA s are designed in the form of balconies on the second/third floor for the townhouse units. Therefore, for these properties, outdoor noise control measures are not required. Figures 6, 7 and 8 show the typical ground floor plan, second floor plan and elevation of the townhouse buildings. 4.3 INDOOR NOISE ENVIRONMENT The criteria for indoor Leq sound levels are based on projected Leq levels at the outside face of the dwellings with appropriate assumptions for the differences between the outdoor and indoor sound levels. If the outside Leq levels do not exceed the recommended objective sound levels, then the indoor Leq levels will not be exceeded, assuming standard building construction and operable windows. Overall daytime sound levels at the building facades are shown in Table 3. Overall nighttime sound levels at the building facades are shown in Table 4. In consideration of the estimated sound levels and by comparison to the acceptable indoor noise criteria (Section 3) the following is concluded: The daytime/nighttime noise environment at the outside walls of the following receptors will equal or exceed 65/60 dba respectively: Receptors: Townhouse Buildings C, D and Apartment Building Therefore, central air conditioning is required. 10

13 The daytime/nighttime noise environment at the outside walls of the following receptors will be in the range of dba day/51 59 dba night: Receptors: Townhouse Buildings A and B Forced-air heating system with provision for central air conditioning is therefore required. However, as advised by the project consultant, all townhouses will receive central air conditioning. The calculated Acoustic Insulation Factors (A.I.F.) are summarized in Tables 3 and 4. Sample sound level calculations at representative receptor locations are presented in Appendix B. Additional Notes Regarding Air Conditioning Systems in Apartment Buildings Based on the Sound Level Criteria and the established future sound levels, it was concluded that some of the dwelling units in the apartment building within the proposed development may require air conditioning and/or provision for future installation of air conditioning. There are several techniques available to air condition apartment units using either a system central to the entire building or alternatively each apartment unit would have its own central system including the indoor fan and the outdoor condensing unit. As it is not the subject of this report to discuss the specifics of all systems that may be used, the following comments are offered, however, to assist the proponent, the Mechanical Consultant and the Contractor in appreciating the acoustical problems and concerns associated with some of the commonly available commercial air conditioning systems: 1. The location and the design of the central system (cooling tower, condensing unit, openings in mechanical rooms, etc.) are important elements that should be checked by the Mechanical Consultant in order to achieve the stated outdoor and indoor sound level criteria. 2. Air conditioning units central to each individual apartment unit should also be designed by the Mechanical Consultant to meet the objective sound levels. If split-systems are used, then the location of the outdoor units should be selected to avoid outdoor living areas and the windows of habitable spaces. Other noise control measures are available including quieter makes, the use of sound barriers, etc. If through the wall incremental units are used, then the selected incremental units should have the following features in order to reduce the transmission of high outside noise levels into the suites: a) The partition in the heating/cooling chassis should be of the acoustically sealed type (this partition separates the outdoor and indoor components). b) The unit should preferably be of the insulated double casing design. 11

14 c) The interior of the unit should be acoustically lined. d) The perimeter of the sleeve should be caulked all around with acoustical sealant. e) The unit may be placed through the living room wall and ducts extended to the adjoining bedroom or dining room in accordance with manufacturers recommendations. 4.4 TYPICAL WINDOW/WALL CONSTRUCTION As the detailed architectural plans are not available at this time, it is therefore not possible to specify the window and wall details to meet the AIF requirements presented in Tables 3 and 4. Further detailed analysis should be undertaken based on the data presented in this Report to take into consideration the final room location, floor area, window type (operable or fixed), window size and orientation, etc. Such analysis is required by the MOE and the municipality prior to submission for building permits as part of their Certification process. Wall construction using concrete block, brick veneer, precast concrete panels or acoustically equivalent light frame construction will be adequate to meet the indoor sound level criteria. It must be pointed out that there are several factors affecting the final glass selection including: 1. Size of window. 2. Room dimensions. 3. Floor level and direction room faces. 4. Fixed or operable glass. 5. The number of building components. 6. Type of wall to be used. 7. Projected sound levels outside the window For the calculation of type of windows required for each dwelling, a detailed description of each unit is required. As an example, for a typical unit with nighttime outdoor sound level of 66 dba, the AIF value for the bedrooms will be 33 assuming 3 components. If the window to floor ratio is 20%, then the window requirements in terms of glass thickness, mm (air space thickness, mm) glass thickness, mm are any of the following: Double Glazed: 3mm (20mm) 3mm; 4mm (16mm) 4mm As an example, for a typical unit with daytime outdoor sound level of 71 dba, the AIF value for the Living Room will be 33 assuming 3 components. If the window to floor ratio is 32%, then the window requirements in terms of glass thickness, mm (air space thickness, mm) glass thickness, mm are any of the following: 12

15 Double Glazed: 3mm (32mm) 3mm; 4mm (25mm) 4mm As the information above are typical examples only, therefore, prior to submission of the building plans for building permit, we recommend that the detailed architectural drawings of the units requiring noise control measures, as referred to earlier, be examined by the Acoustical Consultant in order to advise the design consultant on the specific building components for noise control. 4.5 CONTROL OF AIR CONDITIONING UNITS NOISE Townhouse Buildings To control the environmental noise emitted by air conditioning or heat pump units it is essential that the following procedures and specifications be considered to by the parties responsible for the selection, design and installation of the air conditioning systems: 1. Control of air conditioning noise is governed by Provincial and/or municipal standards which specify acceptable sound emission levels for the air conditioning devices and/or acceptable sound levels at the point(s) of reception. The Ministry of Environment criteria for control of air conditioning noise are outlined in several technical publications including publications NPC-205 and NPC-216. The applicable sound level criteria for new residential development where air conditioning is a mandatory requirement for noise control inside habitable rooms are: 1) a maximum ARI * Sound Rating to suit the site specific installation for the air conditioning device, and 2) hourly Leq sound level limits of 55 dba at the point(s) of reception (or the prevailing hourly Leq due to vehicular traffic ambient noise, if higher than 55 dba). Municipal standards for air conditioning noise may also include specific or maximum Sound Rating numbers (in bels) and/or point-of-reception sound level limits in reference to specific municipal By-Laws and/or standards as applicable. Therefore, it is essential that the final selection, location, design and specifications of the air conditioning devices ensure compliance with the applicable sound level criteria prior to making any commitment. The following are examples of the preferred approach when dealing with the issue of air conditioning noise. * When tested in accordance with ARI Standard

16 a) If the A/C condensing unit are to be installed in backyards in urban areas, then units having lower bels rating may be required. The use of lower sound rating such as 6.8 bels may give the builder the flexibility of locating the unit as close as 3 metres from the joint property lines without exceeding the MOE 55 dba standard for houses in urban areas. b) If the unit is to be located in the front yard area or in the side yard areas (closer to the front and provided that there are no windows to habitable rooms on the side walls), then units having less stringent sound level ratings may result in achieving both sound criteria. c) Through the building permit process of the specific properties, additional calculations should be performed to optimize the unit sound ratings depending on the house model and the installation location. 2. The resulting sound levels due to residential air conditioners at the nearest points-of-reception shall not exceed the levels in MOE Publication NPC The siting of the split-system central air conditioning units and other systems shall follow good planning principles. 4. Should it be necessary to locate the air conditioner's outdoor unit in the backyard or side yard areas where noise is likely to interfere with the outdoor and indoor activities of any occupant and/or neighbour then it is necessary to design and install noise control measures. Noise control measures include any or a combination of the following: a. Distance setback away from the receptor(s). b. Sound barrier wall(s) or ultimately an acoustic enclosure. c. Sealing selected windows; i.e. installation of non-operable windows. d. Deleting selected windows. It is also our recommendation that the necessary detailed technical analysis be performed prior to submitting an application for Building Permit to optimize the required air conditioning unit Sound Rating number in order to meet the Provincial sound level standards at the closest receptors after taking into consideration the specific property design and proposed a/c unit location. Other a/c noise control measures, where required to meet the sound level criteria at the point(s) of reception, shall also be identified and shown on the applicable permit drawings/specifications. Apartment Building This section deals with the potential noise impact of the proposed high density apartment building in which the cumulative noise due to the suite air conditioning units of the referenced building may affect the adjacent noise sensitive area. 14

17 There are typically three types of suite AC units that may be used, as described below: 1. The use of a central AC system that is central to the entire building whereby a large chiller, condenser (or fluid cooler/air-cooled condenser), pumps, etc. are used. The general location of such system is commonly on the roof of the subject building. Noise control of the referenced equipment is a fairly straight forward design exercise whereby the engineers can make use of several standard provisions for noise control. The provisions include the use of silencers, acoustic louvers, acoustic shielding by the structure, low noise emission levels equipment, etc. All of such measures are fairly straightforward as far as selection, design, and specifications. Accordingly, the details such measures can be specified in due course suitable for this land use application. 2. For many types of buildings and for the purposes of independent energy metering for individual suites, a packaged HVAC unit that is considered central to each suite is installed within each suite in a small closet with access to the outside for heat exchange and for gas heating vents. Each closet serving one suite contains a louver to the outside for condenser intake and discharge, as well as for natural gas exhaust vents. Of concern is the potential cumulative noise impact when several of such AC units operate simultaneously during the day and night in the hot season and thus affecting the adjoining neighbours. 3. The other alternate means for central air conditioning of apartment units in relatively low rise apartment buildings and stacked townhouses, is to use split-system heating/cooling units where the condenser is located on the roof of the building along with other condensing units serving the other neighbours in the same building or on each balcony in the suite while the evaporative coils are located in a small enclosure within the suite with possible small access to the outside for combustion exhaust release (not usually of concern). The multiple condensing unit installation on the roof or the cumulative balcony noise potential is the source of environmental noise affecting the neighbours and other nearby residential dwellings. At the present time, there is no information available on the type of Heating, Ventilation, and Air Conditioning system (HVAC) to be used. Therefore the cumulative noise impact of the Apartment Building is determined using noise prediction model based on reasonable technical assumptions and based on information extracted from the building plan and elevation drawings. The following is a summary of the assumptions made regarding the potential noise sources: 15

18 The sound emission level to outdoors for each AC units are assumed to be 42 dba at 10 meters. The Apartment Building is assumed to have 12 suites with individual A/C unit on each floor each direction, for a total of 10 floors. Each AC unit is likely to operate approximately 50 minutes in any one hour during the day time, 30 minutes during the evening and 20 minutes at night. An operational diversity factor of 80% is used in regards to all AC units in operation simultaneously at all times (approximately 1dB factor). In general, the high density building with multiple HVAC units will have to meet the Ministry of the Environment limits summarized as follows: Leq(1hr) Day: 50dBA, Leq (1hr) Evening: 50dBA, Leq (1hr) Night: 45dBA, (or the ambient sound levels due to road traffic if higher). For this project, two near-by noise sensitive areas may be affected by the proposed development, as summarized below: RA: The existing residential houses to the north of the Apartment Building, across the Old Bronte Road RB: The existing residential houses to the south of the Apartment Building, across the Bronte Road The following is a summary of the resulting sound level assessment, without mitigation at each of the selected receptors: Receptor RA: Leq (1h) 47dBA day, 45dBA evening and 43dBA night Receptor RB: Leq (1h) 41dBA day, 39dBA evening and 37dBA night In conclusion, for the selected receptors, the unattenuated sound levels are predicted not exceed the MOE criteria. Therefore, outdoor noise control measures will not be required. The resulting sound levels due to large central air conditioners associated with apartment shall not exceed the Ministry of Environment sound level criteria included in their Publications NPC-300 and NPC-233. Noise control measures for large central air conditioning systems include any or a combination of the following: a. Directing the air intake and discharge openings away from the noise-sensitive receptors. b. The use of partial and/or full enclosures. c. Using parts of the building as sound barrier. d. The use of silencers and/or acoustic louvers on air discharge and intake openings. e. Distance setback. 16

19 It is also our recommendation that the necessary detailed technical analysis be performed prior to the certification process for Building Permit to address the specific requirements for the control of the selected air conditioning system to meet the sound level criteria at the point(s) of reception and to include same in the applicable permit drawings/ specifications. Indoor Sound Levels While the control of the indoor noise created by the air conditioning equipment is not the direct subject of this study, it is important that the selected and designed air conditioning systems achieve indoor sound levels that meet the OBC/ASHRAE criteria and be at least 5 db lower than the Ministry of Environment's recommended indoor sound level criteria included in Section 3.0 of this study. 4.6 STATIONARY SOURCES INTERNAL TO THE PROPOSED APARTMENT BUILDING Stationary sources of noise that are internal to or associated with the proposed apartment building which include building mechanical systems are discussed in more detail in the sections to follow. Since the proposed details of the mechanical equipment and other sources of stationary noise within the proposed building are not available at the present time, reliance is made on proxy data from similar developments elsewhere. Assessment of the details of the identified sources is best addressed during the Building Permit stage and in particular for the building s HVAC equipment. The following is a full list of the potential sources that can be accounted for at this stage based on the level of detail being submitted as well as our experience in dealing with similar projects. (I) Apartment Building s HVAC and Emergency Power Systems a. Garage Ventilation Fans The garage level for the residential building will be composed of two floors, each floor requiring a set of fans (two to four fans) generating approximately 50,000 CFM per floor which would operate intermittently as they are tied in with CO monitoring systems. 17

20 Each floor is therefore capable of generating a sound level of 76 dba at 15 meters without taking into effect the exhaust shaft and directivity of the exhaust opening. At the outlet on the street level, it is expected that each floor is capable of generating approximately 63 dba at 15 meters, which when extrapolated to 2 floors the results would be 66 dba at 15 meters. Due to the presence of proposed apartment building, placement of the exhaust fans on the ground floor will require the application of noise control measures such as selection of quieter fans and the use of minimum 2 inch thick acoustic liners on the duct shafts. The preferred alternative is to place all air discharge shafts away from nearby residential units. Air intake openings do not require the application of any noise controls. b. Makeup Air / Air Handling Units The building is comprised of approximately 240 (+/-) residential units which will require an approximate ventilation rate of 30,000 (+/-) CFM which will typically be supplied using two large rooftop makeup air units and a smaller makeup air unit within the larger common areas on the ground and first floor levels. Each fan would have a capacity of approximately 15,000 CFM using forward curved blade centrifugal fans. Based on typical desired performance in apartment buildings, each MUA unit will be capable of generating approximately 63 dba at 15 meters. The presence of a parapet wall on top of the building is likely to reduce this noise by at least 5 db, i.e. resulting in 58 dba at 15 meters. The noise from the MUA units are likely to affect two points of reception which are the top floor residential units within the same tower as well as the existing residential units of the tower to the east. Accordingly, it is expected that the air intake side of the MUA units be required to have air intake silencers that are sized to provide a minimum sound level reduction of approximately 10 db or alternatively, the air intake openings be directed away from the nearby residential tower; i.e. towards the west. Based on the foregoing, there may be a need for the use of minor noise controls from the MUA s. 18

21 c. Emergency Generator A typical apartment tower would normally be fitted with an emergency diesel / gas powered generator that is likely to be located either below ground (in a room in the garage or basement) or above the roof depending on the desired arrangement. As far as approvals are concerned, the Proponent will also be required to apply for a permit to have the generator installed as part of the MOE s EASR Program. It is important to note that with the application to the MOE, all noise requirements would be deemed to have been satisfied and no further requirements apply. To ensure compliance, the following are typical commercially available controls that are commonly used depending on the size of the generator, the energy source and its final location within the building: The following is a summary of the recommended noise control measures: 1. The air/intake and air discharge ducts within the Generator Room may be fitted with passive silencers capable of providing minimum Dynamic Insertion Loss to meet the performance specs. 2. The air intake louver and air discharge louvers serving the Generator Room should be of the acoustic type to provide an additional Insertion Loss where required. 3. The interior wall and ceiling of the Emergency Generator Room should be lined with sound absorbing material having a minimum NRC 0.90 (approx. 75mm, 3 thick material) to cover a least 75% of the surfaces. 4. The Generator silencer should be of the Critical Hospital grade type. 5. The air intake duct to the Fluid Cooler should be covered with minimum 50 mm (2 ) acoustic duct liner. 19

22 TABLES

23 TABLE 1 SUMMARY OF MINIMUM REQUIRED NOISE CONTROL MEASURES RECEPTOR SOUND BARRIER CENTRAL AIR COND. PROVISION FOR CENTRAL AIR CONDITIONING WARNING CLAUSE Townhouse Buildings A No No Yes Yes Townhouse Buildings B No No Yes Yes Townhouse Buildings C No Yes No Yes Townhouse Buildings D No Yes No Yes Apartment Building No Yes No Yes

24 N6 Leq-AIF Master-January 2007 Proceed SS WILSON ASSOCIATES 10/04/ :15 Leq- AIF CALCULATIONS AND TYPICAL WINDOW GLAZING REQUIREMENTS (Using NRC/M OE Pocedures File Number : WA10-93 OUTDOORS Project Name : BRONTE ROAD DEVELOPMENT Table 2 Description :. Any Heavy Rail Line? No Description :. Record Number Consider Record Y Y N N N N N N N N N N UNIT/ LOT NO. Apartment Building Apartment Building Townhouse A/B Townhouse C/D FACE/ DIRECTION North B a lc o nie s South B a lc o nie s No rth So uth Ground Wa lko uts Ground Wa lko uts Te rrac e s Te rrac e s Source 1: ROAD Road Traffic OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS Leq Outdoors Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Additional Adjustment, db Sub-Total Leq, dba Source 2:... Road Traffic OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Additional Adjustment, db Sub-Total Leq, dba Source 3:... Road Traffic OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Additional Adjustment, db Sub-Total Leq, dba Source 4:... Road Traffic OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS OUTDOOR DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Additional Adjustment, db Sub-Total Leq, dba Sub-Tot. 4 Sources Leq, dba Aircraft noise NEF/NEP Adjust Adjust Adjusted NEF/NEP Approx. Overall Combined Leq Overall Road and/or Rail and/or Stationary Sources, Leq (dba) Aircraft Noise Only, NEF NOTES 1.2m High Roof Parapet Wall

25 N6 Leq-AIF Master-January 2007 Proceed SS WILSON ASSOCIATES 31/03/ :49 Leq- AIF CALCULATIONS AND TYPICAL WINDOW GLAZING REQUIREMENTS File Number : WA10-93 DAYTIME (Using NRC/MOE Pocedures) Project Name : BRONTE ROAD DEVELOPMENT Table 3 Description :. Description :. Record Number Consider Record Y Y Y Y N N N N N N N N UNIT/ LOT NO. Apartment Building Apartment Building Townhouse A/B Townhouse C/D FACE/ DIRECTION North South North South Building Façade Building Façade Building Façade B uilding Façade ROOM CLASSIFICATION Living /Dining Living /Dining Living /Dining Living /Dining Living / Dining Adjustm. to Criterion, dba MOE Transportation Sources Daytime Leq Indoor Criteria, dba Aircraft Indoor Criteria, NEF Source 1: ROAD Road Traffic DAYTIME LEVELS DAYTIME LEVELS DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 2:... Road Traffic DAYTIME LEVELS DAYTIME LEVELS DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 3:... Road Traffic DAYTIME LEVELS DAYTIME LEVELS DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 4:... Road Traffic DAYTIME LEVELS DAYTIME LEVELS DAYTIME LEVELS Leq Daytime Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Sub-Tot. 4 Sources Leq, dba Aircraft noise NEF/NEP Adjust Adjust Adjusted NEF/NEP Approx. Overall Combined Leq Assumed Window/ Floor Area % Assumed Total # of Components (Road, Rail, and Other Sources) Assumed Total # of Components Aircraft ONLY AIF of 4 Sources Aircraft AIF Combined AIF Openable or Fixed windows? Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Regular or Laminated Glass Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Other Adjustment Final Adjusted AIF Minimum STC (Approx) Typical Minimum Double Glazing Alternatives NOTES 3( 6 )3 3(13)3 4( 6 )4 3( 6 )3 3(32)3 4(25)4 3(20)6 6(20)6 Living /Dining Living /Dining Living /Dining Living /Dining Living / Dining Living /Dining Living /Dining 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3

26

27 N6 Leq-AIF Master-January 2007 Proceed SS WILSON ASSOCIATES 31/03/ :52 Leq- AIF CALCULATIONS AND TYPICAL WINDOW GLAZING REQUIREMENTS (Using NRC/MOE Poc File Number : WA10-93 NIGHT TIME Project Name : BRONTE ROAD DEVELOPMENT Table 4 Description :. Description :. Record Number Consider Record Y Y Y Y N N N N N N N N UNIT/ LOT NO. Apartment Building Apartment Building Townhouse A/B Townhouse C/D FACE/ DIRECTION North South North South Building Façade Building Façade Building Façade B uilding Façade ROOM CLASSIFICATION Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Bedroom Adjustm. to Criterion, dba MOE Transportation Sources Night Leq Indoor Criteria, dba Aircraft Indoor Criteria, NEF Source 1: ROAD Road Traffic NIGHT TIME LEVELS NIGHT TIME LEVELS NIGHT TIME LEVELS Leq Night Time Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 2:... Road Traffic NIGHT TIME LEVELS NIGHT TIME LEVELS NIGHT TIME LEVELS Leq Night Time Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 3:... Road Traffic NIGHT TIME LEVELS NIGHT TIME LEVELS NIGHT TIME LEVELS Leq Night Time Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Source 4:... Road Traffic NIGHT TIME LEVELS NIGHT TIME LEVELS NIGHT TIME LEVELS Leq Night Time Partial angle of exposure, degrees Partial exposure adjust., db Additional Adjustment, db Sub-Total Leq, dba Angular range of incidence (0,1,2,3) Adjusted AIF Sub-Tot. 4 Sources Leq, dba Aircraft noise NEF/NEP Adjust Adjust Adjusted NEF/NEP Approx. Overall Combined Leq Assumed Window/ Floor Area % Assumed Total # of Components (Road, Rail, and Other Sources) Assumed Total # of Components Aircraft ONLY AIF of 4 Sources Aircraft AIF Combined AIF Openable or Fixed windows? Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Openable Regular or Laminated Glass Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Regular Other Adjustment Final Adjusted AIF Minimum STC (Approx) Typical Minimum Double Glazing Alternatives NOTES 3( 6 )3 3( 6 )3 3( 6 )3 3(20)3 4(16)4 3(13)6 6(13)6 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3 3( 6 )3

28

29 FIGURES

30 SUBJECT PROPERTY FIGURE 1 AERIAL PHOTO OF THE DEVELOPMENT SITE

31 FIGURE 2 PROPOSED SITE PLAN

32 FIGURE 3 APARTMENT BUILDING GROUND FLOOR PLAN

33 FIGURE 4 APARTMENT BUILDING SECOND FLOOR PLAN

34 FIGURE 5 APARTMENT BUILDING ELEVATION

35 FIGURE 6 TOWNHOUSE GROUND FLOOR PLAN

36 FIGURE 7 TOWNHOUSE SECOND FLOOR PLAN

37 FIGURE 8 TOWNHOUSE ELEVATION