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Noise and Vibration - Exhibition Station

Return to Early Works: Exhibition Station

Key Findings

Construction Noise

  • The impact assessment conservatively assumed that all construction equipment would operate in a small work area closest to each sensitive receiver* instead of being spread throughout the project footprint.
  • Without mitigation, there is potential for noise criteria exceedances at 5 Hanna Avenue and the complex located at 6 Pirandello Street and 65-85 East Liberty Street.
  • Potential for exceedances will be minimized by implementing appropriate mitigation measures (see Potential Effects & Mitigation Measures).
  • The impact assessment will be updated before work begins, using the most up-to-date information on construction methods and techniques, equipment, and refined construction areas – so that appropriate mitigation measures will be in place to avoid noise criteria exceedances.

*A sensitive receiver is a location that is sensitive to noise, where noise is assessed. These locations include living and sleeping quarters of dwellings and sleeping quarters of noise sensitive institutional/commercial land uses.

Construction Vibration

  • The impact assessment employed a conservative approach, where construction equipment was assumed to operate at the edge of the project footprint, closest to sensitive receivers.
  • Without mitigation, there is potential for the City of Toronto Prohibited Limit exceedance at 15 Atlantic Ave.
  • Vibration may also be perceptible at 2-20 Atlantic Avenue/28 Atlantic Avenue, 1 Fraser Avenue, and 3 Mowat Avenue/2 Fraser Avenue.
  • Potential for exceedances will be minimized by implementing appropriate mitigation measures (see Potential Effects & Mitigation Measures).
  • Prior to the commencement of construction, the impact assessment will be updated based upon refined construction methodology, site staging, construction areas, and building locations - such that appropriate mitigation measures will be implemented to avoid vibration criteria exceedances.

 

Potential Effects and Mitigation Measures

Construction Noise 

Potential Effects: 

  • Without mitigation, potential for noise level criteria exceedances at 5 Hanna Avenue and the complex located at 6 Pirandello Street and 65 to 85 East Liberty Street.

Mitigation Measures:

  • Use construction equipment compliant with noise level specifications in the Ministry of the Environment, Conservation and Parks’ NPC-115 and NPC-118 guidelines.
  • Keep equipment in good working order and operate with effective muffling devices.
  • Acoustic equipment enclosures for equipment such as compressors and generators.
  • Evaluate acoustic enclosures for power generators.
  • Additional equipment silencers/mufflers.
  • Use of upgraded construction hoarding (considering requirements from CSA Z107.9 for noise barriers) between construction equipment and noise sensitive receivers.
  • Use of localized noise barriers for specific equipment and operations, including rail corridor construction works.
  • Minimize simultaneous operation of equipment where possible.
  • Implement a no idling policy on site (unless necessary for equipment operation).
  • Restrict construction hours where possible:
    • Perform construction during daytime hours where possible.  If night time construction is necessary, activities with the highest noise levels should be conducted during day time periods.
    • If construction will occur outside of normal daytime hours, inform local residents of type of construction and expected duration outside of daytime hours prior to commencing work.
    • Consider operational duration limits for construction on the portion of the Exhibition Station Early Works Project Footprint near 5 Hanna Avenue and the complex located at 6 Pirandello Street and 65 to 85 East Liberty Street.
  • Undertake noise monitoring and regular reporting throughout the construction phase. Where noise criteria are exceeded, additional noise mitigation measures shall be implemented.
  • Develop a communications protocol for providing advance construction noise and vibration impact notices and addressing public complaints in a timely manner.

Example of a construction noise logger

Example of a construction noise logger

 

Construction Vibration

Potential Effects:

  • Without mitigation, potential for perceptible vibration levels at the commercial buildings located at 15, 2/28 Atlantic Avenue, 1 Fraser Avenue, and 3 Mowat Avenue/2-20 Fraser Avenue.
  • Without mitigation, potential for City Bylaw vibration level exceedance at the footings of the Gardiner Expressway and 15 Atlantic Avenue.

Mitigation Measures:

  • Use equipment with low vibration emissions where possible.
  • Restrict construction hours where possible:
    • Perform construction during daytime hours where possible. If night time construction is necessary, the activities with the highest vibration levels should be conducted during day time periods.
    • If construction will occur outside of normal daytime hours, inform local residents before construction of type of construction and expected duration outside of daytime hours.
    • Consider operational duration limits for construction near the commercial buildings located at 15, 2/28 Atlantic Avenue, 1 Fraser Avenue, and 3 Mowat Avenue/2-20 Fraser Avenue.
  • Update impact assessment based upon refined site staging, construction areas, and building locations prior to the commencement of construction.
  • Use alternative means of construction within 11.1 metres of structures extremely susceptible to vibration damage.
  • Review and refine construction activities in proximity to the Gardiner Expressway and, if required, conduct a more detailed analysis with respect to
  • the Gardiner Expressway footings and review other applicable vibration limits such as the City of Toronto Specification GN117SS.
  • Conduct monitoring and pre-construction inspections in accordance with City of Toronto Bylaw 514, as required.
  • Provide smooth surfaces for trucks to travel.
  • Operate construction equipment on lower vibration settings where available.
  • Maximize distance between equipment and sensitive receivers.
  • Develop a communications protocol for providing advance construction noise and vibration impact notices and addressing public complaints in a timely manner.

Example construction vibration monitor

Example construction vibration monitor

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