Noise Feasibility Study Stacked Townhouse Development Glenashton Drive (Block 55) Oakville, Ontario

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1 Noise Feasibility Study Stacked Townhouse Development Glenashton Drive (Block 55) Oakville, Ontario Prepared for: Nathan Jamieson, P.Eng Senior Principal, Community Development Stantec Consulting Ltd 300W 675 Cochrane Drive, West Tower Markham, Ontario L3R 0B8 Prepared by Victor Garcia, EIT Reviewed by Sheeba Paul, MEng, PEng February 18, 2016

2 Table of Contents 1 Introduction & Summary Site Description & Noise Sources Noise Level Criteria Road Traffic Noise Traffic Noise Predictions Road Traffic Road Traffic Noise Prediction Traffic Noise Recommendations Outdoor Living Areas Indoor Living Areas & Ventilation Requirements Building Façade Constructions Warning Clauses Summary of Recommendations Implementation Figure 1 Aerial Photo of Site Figure 2 Proposed Site Plan Showing Prediction Locations Figure 3 Proposed Site Plan Showing Ventilation Requirements Appendix A Road Traffic Information Appendix B Sample STAMSON 5.04 Output

3 Noise Feasibility Study (Block 55), Stacked Townhouse Development Page 1 Glenashton Drive, Oakville, Ontario February 18, Introduction & Summary Howe Gastmeier Chapnik Limited (HGC Engineering) was retained by Stantec Inc. to conduct a noise feasibility study for a proposed residential development (Block 55) to be located south of Glenashton Drive, west of Trafalgar Road at the end of Lillykin Street, in the Town of Oakville, Ontario. Areas surrounding the proposed development are mainly residential. The site will consist of two blocks of stacked townhouses. The study is required by the municipality as part of their planning and approvals process. This report is being updated to reflect the latest site plan prepared by Guthrie Muscovitch Architects dated January 27, HGC Engineering completed a noise report entitled Noise Feasibility Study, Stacked Townhouse Development, Glenahston Drive (Block 55), Oakville, Ontario dated September 2, 2015 and addendum letter dated January 7, The primary noise sources impacting the site were determined to be road traffic on Glenashton Drive and Trafalgar Road. Predicted road traffic data for Glenashton Drive and Trafalgar Road were used to predict future traffic sound levels at the facades of the proposed residential blocks. The predicted sound levels were compared to the guidelines of the Ministry of Environment and Climate Change (MOECC), Region of Halton and the Town of Oakville to develop noise control recommendations for the proposed site. The sound level predictions indicate that the future road traffic sound levels will exceed MOECC guidelines at all of the proposed residential units. Central air conditioning is required for dwellings with direct exposure to Glenashton Drive and/or Trafalgar Road. Forced air ventilation systems with ductwork sized for the future installation of central air conditioning by the occupant will be required for the remaining dwellings. The buildings will require building constructions meeting the minimum requirements of the Ontario Building Code and standard glazing constructions. Warning clauses are also recommended, to inform future owners and occupants of the dwellings of the traffic noise impacts. In summary, with suitable controls integrated into the building plans, it is concluded that this development is feasible from the perspective of noise impact. Details of the assessment leading to this conclusion are provided herein.

4 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 2 Glenashton Drive, Oakville, Ontario February 18, Site Description & Noise Sources The site is situated on the south side of Glenashton Drive, to the west of Trafalgar Road and at the end of Lillykin Street, in the Town of Oakville, Ontario. Figure 1 shows an aerial photo illustrating the location of the proposed site. A site plan of the development prepared by Guthrie Muscovitch Architects dated January 27, 2016 is shown as Figure 2 also showing prediction locations. The proposed development will consist of two stacked townhouse blocks totalling 36 units. A site visit was made by HGC Engineering personnel in August 2015 to make observations of the acoustical environment. The surrounding area is considered to be Class 1 (Urban) in terms of its acoustical environment. Road traffic on Trafalgar Road and Glenashton Drive were confirmed to be the dominant sound sources. There are existing residences in the area surrounding the site. On the northeast corner of the intersection of Glenashton Drive and Trafalgar Road is a dental clinic and pharmacy contained within one building. At the northwest corner are vacant lands which may have future residential uses and a commercial property at the northeast. There are no significant sources of stationary noise within 500 m of the subject site. 3 Noise Level Criteria 3.1 Road Traffic Noise Guidelines for acceptable levels of road traffic noise impacting residential developments are given in the MOECC publication NPC-300, Environmental Noise Guideline Stationary and Transportation Sources Approval and Planning, Part C release date October 21, 2013, and are listed in Table I below. The values in Table I are energy equivalent (average) sound levels [LEQ] in units of A-weighted decibels [dba].

5 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 3 Glenashton Drive, Oakville, Ontario February 18, 2016 Table I: MOECC Road Traffic Noise Criteria (dba) Area Daytime L EQ (16 hour) Road Nighttime L EQ (8 hour) Road Outside Bedroom Windows 55 dba 50 dba Outdoor Living Area 55 dba -- Inside Living/Dining Room 45 dba 45 dba Inside Sleeping Quarters 45 dba 40 dba Daytime refers to the period between 07:00 and 23:00, while nighttime refers to the period between 23:00 and 07:00. The term "Outdoor Living Area" (OLA) is used in reference to an outdoor patio, a backyard, a terrace or other area where passive recreation is expected to occur. Balconies that are less than 4 m in depth are not considered to be outdoor living areas under MOECC guidelines. The guidelines in the MOECC publication allow the sound level in an OLA to be exceeded by up to 5 dba, without mitigation, if warning clauses are placed in the purchase and rental agreements to the property. Where OLA sound levels exceed 60 dba, physical mitigation is required to reduce the OLA sound level to below 60 dba and as close to 55 dba as technically, economically and administratively feasible. A central air conditioning system as an alternative means of ventilation to open windows is required for dwellings where nighttime sound levels outside bedroom or living/dining room windows exceed 60 dba or daytime sound levels outside bedroom or living/dining room windows exceed 65 dba. Forced-air ventilation with ducts sized to accommodate the future installation of air conditioning is required when nighttime sound levels at bedroom or living/dining room windows are in the range of 51 to 60 dba or when daytime sound levels at bedroom or living/dining room windows are in the range of 56 to 65 dba. Building components such as walls, windows and doors must be designed to achieve indoor sound level criteria when the plane of window nighttime sound level is greater than 60 dba or the daytime sound level is greater than 65 dba due to road traffic noise.

6 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 4 Glenashton Drive, Oakville, Ontario February 18, 2016 Warning clauses to notify future residents of possible excesses are also required when nighttime sound levels exceed 50 dba at the plane of the bedroom or living/dining room window and daytime sound levels exceed 55 dba in the outdoor living area and at the plane of the bedroom or living/dining room window due to road traffic. 4 Traffic Noise Predictions 4.1 Road Traffic Glenashton Drive is a collector roadway and Trafalgar Road is an arterial roadway in the Town of Oakville. Ultimate road traffic data for Glenashton Drive was determined by obtaining the predicted 2021 peak hour traffic volume from a traffic brief produced by Stantec, Community Development. The data was projected by 2.5% per year to the year 2026 to anticipate the noise impact from future road traffic. Ultimate road traffic data for Trafalgar Road was obtained from the Region of Halton, Public Works Department. The relevant road traffic data and traffic brief memo are provided in Appendix A. For both Glenashton Drive and Trafalgar Road, a commercial vehicle percentage of 10%, split into 5% medium trucks and 5% heavy trucks, as well as a day/night split of 90%/10%, was used in the analysis. Posted speeds of 50 kph and 60 kph were used for Glenashton Drive and Trafalgar Road, respectively. The resulting future traffic volumes are listed in Table II. Table II: Ultimate and Projected Traffic Data Glenashton Drive Projected to 2026 Trafalgar Road Ultimate Road Name Cars Medium Trucks Heavy Trucks Total Daytime Nighttime Total Daytime Nighttime Total Road Traffic Noise Predictions To assess the levels of road traffic noise which will impact the site in the future, predictions were made using STAMSON version 5.04, a computer algorithm developed by the MOECC. Sample STAMSON output is included in Appendix B.

7 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 5 Glenashton Drive, Oakville, Ontario February 18, 2016 Prediction locations were chosen around the residential site to obtain a good representation of the future sound levels at the units with exposure to Glenashton Drive and Trafalgar Road. Sound levels were predicted in the plane of the 4 th storey windows during daytime and nighttime hours to investigate ventilation and building façade construction requirements. The results of these predictions are summarized in Table III. Prediction Location 1A 1B 1C 2A 2B Table III: Predicted Road Traffic Sound Levels [dba], Without Mitigation Daytime at Description Façade L EQ(16) Block 1, north façade with exposure to Glenashton Drive, some exposure to Trafalgar Road Block 1, east façade with exposure to Trafalgar Road, some exposure to Glenashton Drive Block 1, south façade with some exposure to Trafalgar Road Block 2, north façade with some exposure to Glenashton Drive and Trafalgar Road Block 2, east façade with some exposure to Glenashton Drive and Trafalgar Road Nighttime at Façade L EQ(8) Traffic Noise Recommendations The predictions indicate that the future traffic sound levels will exceed MOECC guidelines at all the dwelling units in the development. Recommendations for ventilation and noise warning clauses to achieve the noise criteria stated in Table I are discussed below. 5.1 Outdoor Living Areas All the dwelling units in the development are stacked townhouse units. The dwelling units may include small patios or balconies less than 4 m in depth which are not considered to be outdoor living areas. These areas are excluded from noise assessment. There are no requirements for acoustic barriers. The site plan does not indicate any common outdoor amenity areas.

8 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 6 Glenashton Drive, Oakville, Ontario February 18, Indoor Living Areas & Ventilation Requirements Central Air Conditioning The predicted sound levels outside the dwellings fronting onto Glenashton Drive and/or with flanking exposure to Trafalgar Road (prediction locations [1A], [1B] and [2B]) will be greater than 65 during the daytime hours. To address these excesses, the MOECC guidelines recommend that these dwellings be equipped with central air conditioning systems, so that the windows can be closed. Provision for the future installation of Air Conditioning The predicted future daytime sound levels outside the plane of the living/dining room windows of the remaining dwellings will be between 56 and 65 dba and the nighttime sound levels outside the plane of the bedroom windows will be between 51 and 60 dba. To address this excess, the MOECC guidelines recommend that these dwelling units be equipped with a forced air ventilation systems with ducts sized to accommodate the future installation of air conditioning by the occupant. Window or through-the-wall air conditioning units are not recommended for any commercial or residential units because of the noise they produce and because the units penetrate through the exterior wall which degrades the overall noise insulating properties of the envelope. The location, installation and sound ratings of the outdoor air conditioning devices should minimize noise impacts and comply with criteria of MOECC publication NPC-300, as applicable. The guidelines also recommend warning clauses for units with ventilation requirements. Inclusion of central air conditioning will meet or exceed the requirements. Figure 3 shows the ventilation requirements for the proposed development. 5.3 Building Façade Constructions Future sound levels at some of the facades of the blocks will exceed 65 dba during daytime hours. MOECC guidelines recommend that the windows, walls and doors be designed so that the indoor sound levels comply with MOECC noise criteria. The required building components are selected based on the Acoustical Insulation Factor (AIF) value for road traffic. To do so, calculations were performed to determine the acoustical insulation factors to maintain indoor sound levels within MOECC guidelines. The calculation methods were developed

9 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 7 Glenashton Drive, Oakville, Ontario February 18, 2016 by the National Research Council (NRC). They are based on the predicted future sound levels at the building facades, and the anticipated area ratios of the facade components (windows and walls) and the floor area of the adjacent room. The minimum necessary specification for the building envelope is AIF-27 for living/dining/family rooms on the north and east façade of Block 1 and the east façade of Block 2, and OBC for bedrooms, based on the possibility of sound entering the buildings through windows and walls. Floor plans and building elevations were not available at the time of this study. Any well sealed thermopane unit having a Sound Transmission Class (STC) rating of 30, that is two 3 mm panes and a 13 mm inter-pane gap will provide sufficient noise insulation as long as the window to floor area ratio is less than 50% for living/dining and family rooms. Any exterior wall construction meeting the Ontario Building Code (OBC) will be acceptable for the townhouse blocks. Any insulated metal exterior door meeting OBC requirements will be sufficient to provide noise insulation. If sliding patio doors are to be used in the dwellings, they must be included in the window area. When detailed floor plans and elevations are available for the townhouse blocks, a detailed noise study should be performed to specify wall and window requirements with sufficient acoustical insulation for the dwelling units based on actual window to floor area ratios. The remaining units within the development will have daytime and nighttime sound levels at the top storey façade that are less than 65 and 60 dba respectively. For these units, any double glazed window construction meeting the minimum requirements of the Ontario Building Code (OBC) will provide adequate sound insulation for the dwelling units.

10 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 8 Glenashton Drive, Oakville, Ontario February 18, Warning Clauses The MOECC guidelines recommend that warning clauses be included in the property and tenancy agreements for the proposed residential buildings with anticipated traffic sound level excesses. Suggested wording for future dwellings with sound levels exceeding the MOECC criteria is given below. Type A: 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 traffic may on occasion interfere with some activities of the dwelling occupants, including any raised patio and/or balcony, as sound levels exceed the sound level limits of the Municipality and the Ministry of the Environment and Climate Change. Suggested wording for future dwellings requiring central air conditioning systems is given below. Type B: This dwelling unit has been supplied with a central air conditioning system which will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the sound level limits of the Municipality and the Ministry of Environment and Climate Change. Suggested wording for future dwellings requiring forced air ventilation systems is given below. Type C: This dwelling unit has been designed with the provision for adding central air conditioning at the occupant s discretion. Installation of central air conditioning by the occupant in low and medium density developments will allow windows and exterior doors to remain closed, thereby ensuring that the indoor sound levels are within the sound level limits of the Municipality and the Ministry of the Environment and Climate Change. These sample clauses are provided by the MOECC as examples and can be modified by the Municipality as required.

11 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 9 Glenashton Drive, Oakville, Ontario February 18, Summary of Recommendations The following recommendations are provided in regard to noise mitigation for road traffic noise for the proposed development. 1. Central air conditioning is required for the dwellings with direct exposure to Glenashton Drive and/or Trafalgar Road. Forced air ventilation with ducts sized for the future installation of air conditioning by the occupant will be required for the remaining dwelling units. Inclusion of central air conditioning will meet and exceed this requirement. 2. Upgraded window glazing constructions are require for dwellings with direct exposure to Glenashton Drive and/or Trafalgar Road. For the remaining dwellings, any building construction meeting the minimum requirements of the Ontario Building Code will provide sufficient acoustical insulation for the indoor spaces. 3. Warning clauses should be included in the property and tenancy agreements and offers of purchase and sale to inform the future residents of the development of the noise issues and the presence of the roadways. The reader is referred to the previous sections of the report where these recommendations are discussed in more detail.

12 Noise Feasibility Study, (Block 55), Stacked Townhouse Development Page 10 Glenashton Drive, Oakville, Ontario February 18, 2016 Table IV: Summary of Noise Control Requirements and Noise Warning Clauses Block No. Façade Ventilation Requirements * Types of Warning Clauses 1 North & east Central A/C A, B Building Façade Constructions LRDR: AIF-27 BR: OBC 1 South & west Forced Air A, C OBC LRDR: AIF-26 2 East Central A/C A, B BR: OBC North, south & 2 Forced Air A, C OBC west Notes: -- No specific requirements. *The location, installation and sound rating of the air conditioning condensers must be compliant with MOECC guidelines NPC-300, as applicable. OBC Ontario Building Code LRDR Living room/dining room BR Bedroom 6.1 Implementation To ensure that the noise control recommendations outlined above are fully implemented, it is recommended that: 1. When architectural plans are available for dwellings with direct exposure to Glenashton Drive and/or Trafalgar Road, an acoustical consultant should review the plans to determine appropriate glazing constructions. 2. Prior to assumption, an acoustical consultant shall verify that the noise control measures have been implemented.

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16 APPENDIX A Road Traffic Data

17 2021 Future Total Traffic Proposed Access Driveway Trafalgar Road 1,249 1,320 1,095 1, , , Glenashton Drive Glenashton Drive , , , ,624 AM Peak Hour 123 Figure 6 N PM Peak Hour 123 N.T.S Future Total Traffic Volumes

18 1 Sheeba Paul 25/02/2014 4:22 PM Sheeba Paul From: Sent: To: Subject: Krusto, Matt February :21 PM Sheeba Paul RE: traffic data request, Trafalgar Road, Oakville, ON Hi Sheeba! The data used for the Sheridan College noise study (2012) is applicable and from the same area of Trafalgar Road. Trafalgar Road: 2013 AADT 38, AADT 58,400 Posted Speed Limit 60 km/h Lanes by Trucks 5% medium, 5% heavy Matt Krusto Transportation Co-ordinator Transportation Services Public Works Department, Region of Halton E: matt.krusto@halton.ca T: x 7225 From: Sheeba Paul [mailto:spaul@hgcengineering.com] Sent: Tuesday, February 25, :07 PM To: Krusto, Matt Subject: RE: traffic data request, Trafalgar Road, Oakville, ON Hello Matt, HGC Engineering is performing a noise study for a proposed residential building in the Town of Oakville. Please find attached a Google link for your reference &spn= , &sll= , &sspn= , &oq=1229+marl&hnear=1229+Marlborough+Ct,+Oakville,+Ontario+L6H+3B6&t=m &z=15 We would like to request road traffic volumes, ultimate AADT for Trafalgar Road (between Upper Middle Road and QEW), along with commercial vehicle percentages (medium and heavy trucks) and speed. Thank you. Ms. Sheeba Paul, MEng, PEng Senior Engineer, Associate

19 APPENDIX B Sample STAMSON 5.04 Output

20 A.TXT STAMSON 5.0 NORMAL REPORT Date: :01:25 MINISTRY OF ENVIRONMENT AND ENERGY / NOISE ASSESSMENT Filename: 1_1a.te Time Period: Day/Night 16/8 hours Description: North facade of Block 1 Road data, segment # 1: Glenashton (day/night) Car traffic volume : 7057/784 veh/timeperiod * Medium truck volume : 392/44 veh/timeperiod * Heavy truck volume : 392/44 veh/timeperiod * Posted speed limit : 50 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): 7700 Percentage of Annual Growth : 2.50 Number of Years of Growth : 5.00 Medium Truck % of Total Volume : 5.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 1: Glenashton (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 : / m Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Road data, segment # 2: Trafalgar (day/night) Car traffic volume : 47304/5256 veh/timeperiod * Medium truck volume : 2628/292 veh/timeperiod * Heavy truck volume : 2628/292 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 : Medium Truck % of Total Volume : 5.00 Heavy Truck % of Total Volume : 5.00 Day (16 hrs) % of Total Volume : Data for Segment # 2: Trafalgar (day/night) Angle1 Angle2 : 0.00 deg deg Wood depth : 0 (No woods.) No of house rows : 0 / 0 Surface : 1 (Absorptive ground surface) Receiver source distance : / m Receiver height : / m Page 1

21 A.TXT Topography : 1 (Flat/gentle slope; no barrier) Reference angle : 0.00 Results segment # 1: Glenashton (day) Source height = 1.50 m ROAD ( ) = dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq Segment Leq : dba Results segment # 2: Trafalgar (day) Source height = 1.50 m ROAD ( ) = dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq Segment Leq : dba Total Leq All Segments: dba Results segment # 1: Glenashton (night) Source height = 1.50 m ROAD ( ) = dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq Segment Leq : dba Results segment # 2: Trafalgar (night) Source height = 1.50 m ROAD ( ) = dba Angle1 Angle2 Alpha RefLeq P.Adj D.Adj F.Adj W.Adj H.Adj B.Adj SubLeq Segment Leq : dba Total Leq All Segments: dba TOTAL Leq FROM ALL SOURCES (DAY): dba (NIGHT): dba Page 2