Acoustic Report – Daniel Lyzun & Associates

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Acoustic Report – Daniel Lyzun & Associates

DANIEL LYZUN & ASSOCIATES (DL&A) LTD.

Consultants in Acoustics and Noise Control

Daniel Lyzun & Associates Ltd. Griffin Centre, 367-901 W. 3rd Street, North Vancouver, BC V7P 3P9 Canada P: 604-998-4055 F: 604-998-0217 Email: [email protected] www.daniel-lyzun-associates.com - 2 -




May 23, 2013 File: AO.001.13 Acton Ostry Architects Inc 111 East 8th Avenue Vancouver, BC V5T 1R8 Attention: Kim Winston Dear Kim Re: Mixed-Use Residential Development, 275 Kingsway, Vancouver, BC

– Site Noise Impact Study We have now completed our updated review of the site noise impact for the proposed mixed-use residential development at 275 Kingsway in Vancouver, BC. The sections of the report that follow summarize the results of the detailed review and offer recommendations for upgrading the façade construction to meet the City of Vancouver requirements. Project Description Based on the information and drawings provided to us to date, it is our understanding that:

x The proposed development is a 12-storey mixed-use residential development x There are 195 residential housing units and ground floor commercial space along

Kingsway and E 11th Avenue x There is a central external circulation space that is partially sheltered from the

elements by a translucent roof canopy x The project is comprised of 2 consolidated sites x There is a rooftop garden with a semi-covered children’s play space x There will be a community garden space on the roof as well x The project site is currently located in C-3A District Schedule. It is our

understanding that you intend to apply to rezone from C-3A to CD-1





document "Road and Rail Noise: Effects on Housing". The development authorities of the City of Vancouver accept this procedure.

City of Vancouver Requirements - Acoustics For the project site, according to C-3A District Schedule of the City of Vancouver, the A-weighted 24-hour equivalent (Leq) noise levels in the portions of dwelling units listed below shall not exceed the following noise criteria: Portion of Dwelling Unit Noise Criteria Bedrooms 35 dBA Living, dining, recreation rooms 40 dBA Kitchen, bathrooms, hallways 45 dBA

The above requirements are in line with the CMHC criteria. The CMHC guidelines also state that a traffic noise level between 55 dBA and 75 dBA is considered to be “normally unacceptable” for housing. This means that careful acoustical measures (over and above construction meeting the BC Building Code) may be required to achieve acceptable indoor noise levels.

As for the ‘City of Vancouver - High-Density Housing for Families with Children Guidelines’ which applies to this project, it is our understanding that there is no specific indoor noise requirements with respect to the traffic noise impact review. In view of this, our current study is based on the C-3A District Schedule requirements as noted above.

Detailed Review and Recommendations By using the IBANA-Calc software (which was developed by the National Research Council of Canada) and our site noise measurement data (i.e. frequency spectrum), we have determined the building envelope sound insulation requirements relative to the CMHC ‘indoor’ criteria. Based on the above approach, the recommendations to satisfy the acoustical requirement of the City of Vancouver are as follows: 1. Exterior Wall (non-glazed section)

Our review indicates that the non-glazed exterior wall section with Sound Transmission Class (STC) rating of STC 35, or higher, would provide adequate noise isolation for the residential suites in the proposed development. As indicated in your email of May 22, 2013, minimum STC 35 external wall system will be incorporated in the building design. This is acceptable acoustically. We will update our review once the exterior wall details are provided to us.




Site Conditions Based on our site visit made on April 29, 2013, we determined that the significant exterior noise source for this project site is the vehicular traffic on Kingsway. Traffic noise impact generated from E 10th Avenue, E 11th Avenue and Prince Edward Street is considered minimal. Our two-part analysis first involved an assessment of the environmental noise exposure at the building facades. The second part was a review of the exterior facade construction relative to the City of Vancouver's development permit requirements for acceptable interior noise levels.

Traffic Noise Exposure Prediction of the 24-hour equivalent traffic noise exposure levels was based on the available traffic count data (24-hour traffic volume) obtained from The City of Vancouver VanMap (an official online mapping application). The data is summarised below:

200 Kingsway 200 E 10th Avenue 200 E 11th Avenue Prince Edward St. East/West Bound East/West Bound East/West Bound -

24-hours Traffic Volume [Note 1] 17010/16866 2090/2166 1230/562 No data

Percentage of Heavy Vehicles [Note 2] <5% - - -

Speed 50km/h 50km/h 50km/h -

Note 1: As noted from the data sheets which we downloaded from the City of Vancouver VanMap, the 24-hour

traffic count for 200 Kingsway, 200 E 10th Avenue and 200 E 11th Avenue were made in 1999, 2012 and 2006, respectively.

Note 2: As the heavy vehicles traffic count data for 200 Kingsway (truck route) was not available, we have assumed this to be less than 5% based on our previous experience on other projects in the area.

Based upon the above traffic data and the current building design, we have estimated the A-weighted 24-hour equivalent noise exposure of the project site: Building’s Façade Traffic Noise Exposure Levels* North face (facing E 10th Avenue and Kingsway) 65-68 dBA West face (facing Kingsway) 68-71 dBA South face (facing E 11th Avenue and Kingsway) 65-68 dBA East face (facing lane, E 10th Avenue and Prince Edward St.) 55-60 dBA * Range of levels also reflects changes in elevation from street level to the upper floors

The exposure levels presented are rounded to integral values and have included corrections for source-to-receiver distances (horizontal and vertical), as well as shielding effects from surrounding existing buildings and the development itself, following the procedure set out by the Canada Mortgage and Housing Corporation (CMHC) in their





Façades facing Kingsway and E 11th Avenue - All levels All units’ living room glazing and/or balcony door Our review indicates that exterior glazing (for fixed/open-able windows and balcony doors as indicated in the diagram below) with Sound Transmission Class (STC) rating of STC 30, or higher, would provide adequate noise isolation for the living room in the residential suites.




2. Balcony

As indicated in your email of May 22, 2013, the balcony glass will be minimum 6mm thick. This is acceptable acoustically.

3. Exterior Glazing and Balcony Doors

Façades facing Kingsway and E 11th Avenue - All levels ‘1 bed studio suite’ glazing and/or balcony door Our review indicates that exterior glazing (for fixed/open-able windows and balcony doors as indicated in the diagram below) with Sound Transmission Class (STC) rating of STC 35, or higher, would provide adequate noise isolation for the residential suites.

Façades facing Kingsway and E 11th Avenue - All levels ‘2 bed suite’ bedroom glazing and/or balcony door Our review indicates that exterior glazing (for fixed/open-able windows and balcony doors as indicated in the diagram below) with Sound Transmission Class (STC) rating of STC 35, or higher, would provide adequate noise isolation for the bedrooms in the residential suites.





4. Balconies and Outdoor Amenity Spaces

According to the C-3A District Schedule, it is our understanding that the City of Vancouver does not have specific acoustical requirements for open areas such as exterior balconies and outdoor amenity spaces.

5. Ventilation

Based on the CMHC guidelines, for sites where the exposure noise levels are in excess of 55dBA, the indoor noise criteria cannot be satisfied if the windows/balcony doors are opened appreciably. This does not mean that openable windows cannot be used for ventilation. What it does suggest, however, is that where an alternative means of ventilation is used in cases where rooms have noise impacted windows and/or exterior doors, noise mitigation of this system should be considered. There are a number of methods to provide fresh air ventilation to the units (for example, it may be possible to provide alternative ventilation through an acoustically treated exterior duct). We understand that there may be other code requirements regarding mechanical ventilation. The details of such systems are within the purview of the mechanical consultant. However, they can be provided to our office for review of compliance with our acoustical recommendations.

Call if you have any questions on items contained herein, or if we can provide any additional information at this time. Sincerely, Daniel Lyzun & Associates Ltd. per:

Daniel Lyzun, P. Eng. David Hung, B. Eng., MIOA Principal Consultant CC: Mark Ostry, Acton Ostry Arch. Peter Edgar, Edgar Dev. Corp.




Façades facing lane, E 10th Avenue and Prince Edward St. - All levels All units’ living room and bedroom glazing and/or balcony door Our review indicates that exterior glazing (for fixed/open-able windows and balcony doors as indicated in the diagram below) with Sound Transmission Class (STC) rating of STC 30, or higher, would provide adequate noise isolation for the living room and bedrooms in the residential suites.

For the STC 30 glazing, we recommend as a minimum:

x 6mm monolithic glass; or 3 mm float glass + 12 mm air space + 3 mm float glass; or equivalent STC rated glazing configuration.

For the STC35 glazing, we recommend as a minimum:

x 6mm float glass + 13mm air space + 6mm float glass; or equivalent STC rated glazing configuration.

The above windows/glazing should be specified to meet the code requirement for Air Tightness.

Acoustic Report – Daniel Lyzun & Associates

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