DRAFT REPORT. Boyne East Catholic Secondary School #3CSS. Noise Impact Study. Louis St. Laurent Avenue, Milton. SACL #SW18060A0 December 11, 2018

Transcription

1 DRAFT REPORT Boyne East Catholic Secondary School #3CSS Louis St. Laurent Avenue, Milton Noise Impact Study SACL #SW18060A0 Submitted to: Jeff Kenny Partner Strategy 4 Inc Bristol Circle, Unit 100 Oakville, Ontario, L6H 6Z7 Tel: kenny@strategy4.ca Submitted by: Pearlie Yung, M.Sc., P.Eng. Senior Project Engineer Swallow Acoustic Consultants Ltd Revus Ave. Mississauga, Ontario, L5G 4S5 Tel: pyung@thorntontomasetti.com Reviewed by Galen Wong, M.A.Sc. Senior Project Director

2 Page ii Table of Contents 1. Introduction Site Transportation Noise Assessment Critical Noise Receptors Sound Levels Sound Level Limits Outdoor Sound Level Limits Indoor Sound Level Limits Noise Control Measures Outdoor Amenity Area Ventilation Building Components Warning Clauses Stationary Noise Assessment Critical Noise Receptors Noise Assessment Criteria Noise Sources Sound Level Calculation Concluding Comments... 9 Figures Appendices LIST OF TABLES Table 1: Critical Points of Reception for Transportation Noise Source... 2 Table 2: Road Traffic Data Summary... 2 Table 3: Calculated Outdoor Sound Level... 3 Table 4: MOECP Outdoor Sound Level Limit... 3 Table 5: MOECP Noise Control Requirements for Outdoor Receptors... 3 Table 6: MOECP Indoor Sound Level Limit... 4 Table 7: Combination of Road Noise, Ventilation and Warning Clause Requirements... 4 Table 8: Road Noise Building Component Requirements... 5 Table 9: Noise Control Measures... 5 Table 10: Critical Points of Reception for Noise... 6

3 Page iii Table 11: Exclusion Limit Values of One-Hour Equivalent Sound Level... 7 Table 12: Major Stationary Noise Sources... 7 Table 13: Noise Source Sound Power Levels... 8 Table 14: Calculated Sound Level at Receptors... 9 LIST OF FIGURES Figure 1: Site Plan Figure 2: Aerial Photo and Future Subdivision Figure 3: Locations of Stationary Noise Sources LIST OF APPENDICES APPENDIX A TRAFFIC NOISE CALCULATION APPENDIX B INFORMATION OF MECHANICAL EQUIPMENT APPENDIX C CALCULATIONS OF UNMITIGATED NOISE SOURCES

4 Page 1 1. Introduction This document is a Noise Impact Study regarding the proposed Boyne East Catholic Secondary School #3CSS (School) on Louis St. Laurent Avenue in Milton. This Study is associated with a land use planning application. The objective of this Study is to assess if there is any noise impact from transportation noise sources to the proposed School, and noise impact associated with the School on the surrounding noise sensitive land use using noise criteria developed by the Ontario Ministry of the Environment, Conservation and Parks (MOECP). 2. Site The School is located at the southeast quadrant of Louis St. Laurent Avenue and Kennedy Circle. It consists of a school building located on the north side of the site and a sports field on the south side of the site. It is anticipated that the school will be 4-stories high. Future mobile classrooms will be east and south of the proposed school building. A site plan is provided in Figure 1. The School is surrounded by vacant land to the south, east and west which will be developed into commercial use to the west, and residential land use to the south and east in the future. There is an existing shopping plaza at the northwest quadrant of Louis St. Laurent Avenue and Kennedy Circle. An aerial photo of the area and a preliminary layout of future subdivisions is provided in Figure 2. A site visit was conducted on November 15, The potential noise source that will impact the School is road traffic on Louis St. Laurent Avenue. There are no significant stationary noise sources that may impact the School. Transportation noise sources that may impact the School is assessed in Section 3. Stationary noise sources associated with the school that may impact the nearby noise sensitive land use are assessed in Section Transportation Noise Assessment 3.1. Critical Noise Receptors Critical Noise Receptors are those receptors likely to be most affected by the identified noise sources. The critical indoor noise receptor is the north façade of the School facing Louis St. Laurent Avenue. The critical outdoor noise receptor is the sports field on the north side of the side. An additional indoor noise receptor on the west façade selected to determine if there is any significant noise impact from future Kennedy Circle, which will be extended south of Louis St. Laurent Avenue. The locations of the critical receptors are summarised in Table 1 and shown in Figure 2.

5 Page 2 Table 1: Critical Points of Reception for Transportation Noise Source POR ID Location Height (m) POR1 North façade of school building POR2 West façade of school building OLA1 Sports field Sound Levels Traffic volume data for Louis St. Laurent Avenue and future Kennedy Circle were obtained from the Traffic Impact Assessment prepared by GHD and dated October 30, Ultimate AADT is calculated by multiplying the morning and afternoon peak hour background traffic volume in 2026 by a factor of 5, as advised by the traffic consultant. Background traffic volume is the traffic volume excluding vehicles entering and exiting the proposed school. It is our understanding that the future traffic volumes in the Traffic Impact Assessment take into account traffic volume generated by future developments in the currently vacant land. Current truck percentage during peak hours is 2% and no heavy trucks were observed. Heavy trucks are currently prohibited along this section of Louis St. Laurent Avenue. To be conservative, 0.2% out of total traffic volume is assumed to be heavy trucks in the calculation. The traffic data are summarised in Table 2. Table 2: Road Traffic Data Summary Parameter Louis St. Laurent Avenue Kennedy Circle 2026 AM/PM Peak Hours* Ultimate AADT Total Truck Percentage 2% 2% Medium Truck Percentage 1.8% 1.8% Heavy Truck Percentage 0.2% 0.2% Day/Night Split 90%/10% 90%/10% Speed Limit 50 km/h 50 km/h *Data from Traffic Impact Assessment by GHD Calculations of traffic sound levels were performed using STAMSON 5.04, the software implementation of the MOE ORNAMENT for road traffic, which was developed and published by the MOECP for transportation noise prediction. As the School only opens during daytime, only daytime sound levels are under consideration. The calculated sound levels are as follows:

6 Page 3 Table 3: Calculated Outdoor Sound Level Receptor ID Calculated Daytime Sound Level Leq (16 hrs) (dba) POR1 63 POR2 61 OLA1 55 Calculations for traffic noise predictions is attached as Appendix A Sound Level Limits Guidelines for acceptable sound levels of road traffic on residential developments are given in Part C of the MOECP publication NPC-300 Environmental Noise Guideline, Stationary and Transportation Sources Approval and Planning dated Outdoor Sound Level Limits The MOE outdoor sound level limit for traffic noise is as follows: Table 4: MOECP Outdoor Sound Level Limit Time Period Day-time (07:00-23:00) Sound Level (Leq) 55 In addition to the above outdoor levels, the MOECC has a sliding scale to determine the need for outdoor noise reduction measures depending on outdoor sound levels: Table 5: MOECP Noise Control Requirements for Outdoor Receptors Outdoor Sound Level (Day-time Leq) Need for Noise Reduction Measures 56 to 60 dba Noise control measures may be implemented. If no noise control measures are planned, a warning clause must be included in the unit title or lease agreement.

7 Page 4 Outdoor Sound Level (Day-time Leq) Above 60 dba Need for Noise Reduction Measures Control measures (barriers) required to reduce the Leq to below 60 dba and as close to 55 dba as technically, economically and administratively feasible. A warning clause is required if resultant Leq exceeds 55 dba Indoor Sound Level Limits The indoor sound levels limits developed by MOECP for road sources are as follows: Table 6: MOECP Indoor Sound Level Limit Room Time Period Road Sound Level (Leq) Schools Day-time (07:00-23:00) 45 dba In addition to the above indoor levels, the MOECP has a sliding scale to determine the need for noise reduction measures depending on the outdoor sound level: Table 7: Combination of Road Noise, Ventilation and Warning Clause Requirements ASSESSMENT LOCATION Leq VENTILATION REQUIREMENTS WARNING CLAUSE PLANE OF SCHOOL WINDOW (07:00-23:00) Greater than 55 dba to less than or equal to 65 dba. Forced air heating with provision for central air conditioning. Required Greater than 65 dba. Central air conditioning Required

8 Page 5 Table 8: Road Noise Building Component Requirements ASSESSMENT LOCATION PLANE OF SCHOOL WINDOW (07:00-23:00) Leq Less than or equal to 65 dba Greater than 65 dba. BUILDING COMPONENT REQUIREMENTS Building compliant with the Ontario Building Code. Building components must be designed to achieve indoor sound level criteria Noise Control Measures Noise control recommendations for the critical receptors are summarized in Table 9 and discussed in the subsequent sections. Receptor Noise Barrier Table 9: Noise Control Measures Ventilation POR1 - Forced air heating with provision for central air conditioning POR2 - Forced air heating with provision for central air conditioning Building Components Ontario Building Code Ontario Building Code Warning Clause Type C Type C OLA1 No - - No Outdoor Amenity Area As the predicted sound level at the sports field is below 55 dba, noise control measures are not required Ventilation The predicted daytime sound level is between 55 dba and 65 dba on the north façade and west façade. Therefore, the school should be designed with a provision for the installation of central air conditioning in the future, at the occupant s discretion Building Components The predicted daytime sound levels are below 65 dba from road traffic, therefore building

9 Page 6 components that meet the Ontario Building Code will be sufficient to achieve the MOECP indoor sound level limit for the School Warning Clauses Since forced air heating with the provision for installation of central air conditioning is required for a portion of the School, the following Type C warning clause should be inserted in all development agreements and the school board should be informed accordingly: This school has been designed with the provision for adding central air conditioning at the occupant s discretion. 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 sound level limits of the Municipality and the Ministry of the Environment. 4. Stationary Noise Assessment 4.1. Critical Noise Receptors The critical point of reception (POR), where the noise impact is expected to be the greatest, occurs at the nearest noise sensitive land use such as residential properties. The nearest noise sensitive land use is the residential area along the north side of Louis St. Laurent Avenue. Noise receptors at future residential developments east and southeast of the School are also considered. Although there is noise sensitive land use farther away, any noise mitigation required for the school to meet limits at the closer PORs is expected to allow the school to meet the limits at farther receptors, and are thus not assessed herein. The PORs are shown in Figure 2 and are listed in Table 10. Window pane on second level is selected as the POR for each property as it is less shielded by the roof of the school building. Table 10: Critical Points of Reception for Noise POR ID R1 R2 R3 R4 R5 Location Bedroom window on the second floor of the house at 1081 Kennedy Circle Bedroom window on the second floor of the house at 1048 Zimmerman Crescent Bedroom window on the second floor of the townhouse at 1057 Zimmerman Crescent Bedroom window on the second floor of future house located east of the school property. Bedroom window on the second floor of future house located southeast of the school property.

10 Page Noise Assessment Criteria The Ontario Ministry of Environment and Climate Change (MOECC) Noise Publication NPC-300, Environmental Noise Guideline, Stationary and Transportation Sources Approval and Planning states that: For sound from a stationary source, the sound level limit at a point of reception, expressed in terms of the One Hour Equivalent Sound Level (Leq) is the higher of the applicable exclusion limit value given in Table 11, or the background sound level for that point of reception. Table 11: Exclusion Limit Values of One-Hour Equivalent Sound Level Time of Day Outdoor Points of Reception Plane of Window Class 1 Area Class 2 Area Class 1 Area Class 2 Area 07:00-19:00 50 dba 50 dba 50 dba 50 dba 19:00-23:00 50 dba 45 dba 50 dba 50 dba 23:00-07: dba 45 dba The area surrounding the School is considered to be in a Class 2 Area. The MOECC exclusion limits are used to assess compliance in this report. 5. Noise Sources The major noise sources associated with the School are rooftop mechanical equipment. The major rooftop mechanical equipment is listed in Table 12 and their locations are shown in Figure 3. Technical data of the proposed mechanical equipment is provided in Appendix B. The manufacturers sound data are summarized in Table 13. Table 12: Major Stationary Noise Sources Source ID AC-1 AC-2 AC-3 AC-4 AC-5 AC-6 AC-7 AC-8 Source Description Rooftop unit for gymnasium AAON model RN-026 Rooftop unit for gymnasium AAON model RN-026 Rooftop unit for gymnasium AAON model RN-026 Rooftop unit for gymnasium AAON model RN-026 Rooftop unit for exercise room AAON model RN-008 Rooftop unit for stage AAON model RN-009 Rooftop unit for theatre AAON model RN-016 Rooftop unit for theatre AAON model RN-016

11 Page 8 Source ID AC-9 AC-10 AC-11 AC-12 CH-1a CH-2a CH-3a Source Description Rooftop unit for cafeteria AAON model RN-025 Rooftop unit for cafeteria AAON model RN-025 Rooftop unit for atrium AAON model RN-015 Rooftop unit for atrium AAON model RN-015 Air cooled chiller McQuay model AGZ-130 Air cooled chiller McQuay model AGZ-130 Air cooled chiller McQuay model AGZ-130 Table 13: Noise Source Sound Power Levels Sound ID Sound Power Levels (db re Watts) in 1/1 Octave Bands LwA (dba) k 2k 4k 8k AC AC AC AC AC AC AC AC AC AC AC AC CH-1a CH-2a CH-3a To be conservative, it is assumed that all mechanical equipment may run continuously during the worst-case predictable hour during daytime, evening and night-time periods even if the building is not occupied in the evening and at night.

12 Page Sound Level Calculation Sound levels at the PORs due to stationary noise sources associated with the School were calculated using the software CadnaA in accordance with the methods described in ISO Detailed calculations are provided in Appendix D and the calculated sound level are summarised in Table 14. Table 14: Calculated Sound Level at Receptors POR Calculated Sound Level (dba) Sound Level Limit (dba) Compliance? Day/Evening/Night Day/Evening Night R Yes R Yes R Yes R Yes R Yes The calculated sound levels at all critical points of reception meet the sound level limits and no noise mitigation will be required for the stationary noise sources. 6. Concluding Comments With the incorporation of the noise control measures as presented in Section 3.4 of this report, the noise impact from the transportation noise source on the proposed School will meet the MOECP criteria. There are no significant stationary noise sources near the project. Stationary noise sources associated with the School can meet the MOECP sound level limits at existing and future residential properties. The proposed Boyne East Catholic Secondary School #3CSS (School) on Louis St. Laurent in Milton should therefore be approved from the noise aspect.

13 Page 10 Figures

14 7.75m K E Y P L A N 12 Formal Entrance from Street 13 EXIT STAIRS 7.90m. 14 GYM 11 EXIT CORRIDOR PROPOSED BOYNE EAST CATHOLIC 8 AUTO SHOP DOOR 9 AUTO SHOP GARAGE DOOR 10 EXIT STAIRS 15 EXIT STAIRS SECONDARY SCHOOL 97.00m. 7 WOOD SHOP DOOR 6 WOOD SHOP GARAGE DOOR 5 ELECTRICAL 4 EXIT CORRIDOR 3 CUSTODIAL DOOR 16 GYM 2 CUSTODIAL GARAGE DOOR 1 MAIN ENTRANCE 17 GYM ENTRANCE 18 CAFETERIA 19 CAFETERIA DATE DESCRIPTION CHECKED BY REVISIONS NOTE: Contractor is to check and verify all dimensions and conditions on the project, and is immediately report any discrepancies to the landscape architect before proceeding with the work. field house THE HALTON CATHOLIC DISTRICT SCHOOL BOARD Strategy 4 Development Consulting Urban Transformation Urban Design Urban Engineering 2620 Bristol Circle, Suite 100 Oakville, On L6H 6Z7 t: (905) m. Project Name: PROPOSED BOYNE EAST CATHOLIC SECONDARY SCHOOL MILTON, ONTARIO Sheet Description: SITE PLAN (INTERIM CONDITION) Date: Issued: PROPOSED ARTIFICIAL TURF SPORTS FIELD Figure 1 Site Plan NOV Job No.: S42953 Scale: 1:300 SHEET No.: SP.1 Drawn By.: RO/ML Checked By: DT File No.: 2953SP DWG

15 R3 R1 R2 POR1 R4 POR2 R5 OLA1 Figure 2 Aerial Photo and Future Subdivision Layout

16 R4 AC-11 AC-8 R R3 AC-12 AC-7 AC-6 AC-10 R1 AC-9 R5 CH-3a CH-2a AC-3 CH-1a AC AC-5 AC AC Figure 3 Locations of Stationary Noise Sosurces

17 Page 14 Appendices

18 Page 15 APPENDIX A TRAFFIC NOISE CALCULATION

19 Page 16 APPENDIX B INFORMATION OF MECHANICAL EQUIPMENT

20 Page 17 APPENDIX C CALCULATIONS OF UNMITIGATED NOISE SOURCES