General Guidelines for the Preparation of Acoustical Reports

1.0 – The Ministry of the Environment discontinued its review and clearance functions relating to acoustical reports of Regional and local roads within Peel in 1987 and this function has been delegated directly to the Region of Peel and to the pertinent Area Municipality.

In 1996, the Ministry of the Environment further discontinued its review and clearance functions concerning acoustical reports relating to provincial highways, railways, aircraft and major industrial noise sources, and also delegated this responsibility to the Region of Peel and the pertinent Area Municipality.

The Region of Peel and its constituent Area Municipalities require the applicants of all residential plans of subdivision, rezoning and site plans adjacent to major noise sources in the Region to engage the services of a qualified acoustical specialist (hereafter referred to as the Acoustical consultant) to prepare an acoustical report to be signed and submitted by a professional engineer which will recommend noise control measures to meet the sound level objectives of the Region of Peel, the Area Municipality and the Ministry of the Environment.

1.2 – Generally, an acoustical report for a plan of subdivision is required only prior to final approval of the plan to clear the conditions of draft approval. However, when it is anticipated that projected noise levels between 7 am and 11 pm will exceed 65 dBA, an acoustical feasibility report will be required prior to draft approval to determine whether the design proposed and layout of the lots will allow the required sound level objectives to be achieved.

1.3 – Notwithstanding policy 1.2 above, an acoustical feasibility report will be required prior to draft approval for any residential subdivision plan abutting a Provincial or Regional road except in cases whether a master acoustical feasibility study has been approved for the area.

1.4 – The acoustical report must describe the plan of subdivision or the site and its relationship to the major roads and all other major noise sources including industrial, aircraft and rail noise, which may affect future occupants of the subdivision. The report must also identify all future noise sources in consultation with the area municipality and the Region of Peel.

1.5 – Aircraft and freeway noise shall be considered in accordance with Regional and Municipal Official Plan Policies and the Ministry of Municipal Affairs and Housing s aircraft and freeway noise guidelines.

1.6 – All other noise sources including industrial activity shall be considered in accordance with the Ministry of Environment criteria and procedures.

1.7 The report shall give details of prediction techniques used to determine noise levels (road, rail, aircraft) including all adjustments.

2.0 – Noise Prediction and Design Criteria

2.1 – Sound level limits

2.1.1 – The road traffic noise study will be based on the following criteria for sound level limits adopted by the Region of Peel, its constituent municipalities, and the Ministry of the Environment.

2.1.2 – Outdoor Living Area

(7am-11pm) Leq (16 hr) = 55dBA

2.1.3 – Outside Bedroom Window

(11pm-7am) Leq (8 hr) = 50dBA

2.1.4 – Indoor (bedrooms, hospitals)

(11pm-7am) Leq (8 hr) =40 dBA

2.1.5 – Indoor (living rooms, hotels, private offices, reading rooms)

(7am-11pm) Leq (16 hr) = 45 dBA

2.1.6 – Indoor (general offices, shops)

7am-11pm) Leq (16 hr) =50 dBA

2.2 – Traffic noise predictions

2.2.1 – With respect to road traffic predictions, only analytical techniques of current methods as approved by the Ministry of the Environment are accepted.

2.2.2 – Traffic Volumes on arterial roads in the Urban Area (used in predicting noise level calculations) must be based on ultimate lane configuration and posted speed limit with level of service D unless otherwise directed, as set out in the following chart:

Truck percentages are determined from actual counts, where available.

2.2.3 – Requests for traffic data must be provided to the Region of Peel in writing.

2.2.4 – All traffic data sources must be identified in the report.

2.2.5 – Predicted noise level calculations must be included in the report for both daytime (7am-11pm) and nighttime (11pm-7am) periods.

2.2.6 – If manual calculations are used, the report must contain the fully completed MOE Traffic Noise Prediction Work Sheet for all sections calculated. If an acceptable computer model is utilized, sample copies of all sections calculated must be included.

2.2.7 – The report must detail information on all adjustments, where applicable.

2.2.8 – Where there is more than one source impacting the site, the calculations for each source and the combined noise level calculations must be included.

2.2.9 – For industrial, aircraft and rail sound predictions, the Ministry of the Environment standard procedures should be employed with the report detailing the method of calculation or measurement.

2.3 – Noise barrier calculations

1. In Mississauga, 3:1 berm slopes on the street side will be permitted.
2. In Brampton, 3:1 berm slopes on the street side will be permitted as an option if the developer agrees to full planting with low maintenance cover.
3. In cases where the attenuation facility is interrupted, barrier returns or parallel screens are required and the detailed design of the treatment in cases will have to be incorporated into the acoustical report.
4. Barrier walls should generally be located no further than 0.3 metres from the rear lot line or as specified by the Area Municipality. Barrier walls will be located on the private homeowner s side of the lot line.
5. Boulevard slopes (between berms and the edge of the pavement) will preferably be 2%-4%.
6. The combined height of berm and barrier over 4 metres will be considered in very exceptional situations. 4 metre barrier height will generally be calculated (in standard situations) from the centre line of the pavement. In nonstandard or extreme the barrier heights will be considered on an individual basis. The area municipality shall be consulted on local height restrictions. (The maximum barrier height is generally to be measured from a line joining the centre line of the pavement to the ground level at the rear of the dwelling unit, except in nonstandard situations.)

2.4 – Other Noise Control Measures for Outdoor Living Areas

2.4.1 – Alternative measures (site planning, service road, special type or location of acoustical barriers, etc.) should be discussed with the Region and the Areas municipality in advance to receive their acceptance in principle.

2.4.2 – Front yard attenuation (i.e., outdoor living areas in the front yard) area not an acceptable form of noise attenuation for reversed frontage lots.

2.5 – Noise Attenuation for Indoor Living Areas

2.5.1 – Central air conditioning is required when the nighttime noise level is 60 dBA or greater at a bedroom window or when the daytime noise level exceeds 65 dBA at the exterior face of a living room. A warning clause note to this effect is to be included in the reports and in the Subdivision Agreement for registration on title.

2.5.2 – For central air conditions requirements, traffic volumes may be based on a 10-year projection from the estimated date of occupancy of the affected dwellings.

2.5.3 – If central air conditioning is required, a noise insensitive location or other appropriate means of noise attenuation of the air-cooled condenser unit should be stipulated in the report and in the Subdivision Agreement. If a heat pump is installed, the location of the outdoor unit should be specified as well. The location and installation of the outdoor air conditioning device should comply with sound level limits of provincial policies and with any other criteria specified by the municipality.

2.5.4 – If the nighttime outdoor noise level is above 50 dBA and below 60 dBA forced air heating is to be installed with provision for central air conditioning. A warning clause note to this effect is to be included in the report and in the Subdivision Agreement for registration on title. (See wording in2.6).

2.5.5 – When the nighttime outdoor noise level at the bedroom window is 60 dBA or greater, door specifications, outer wall specifications and required window glazing shall be provided. All recommendations shall be based on ultimate traffic volumes and the report shall distinguish between those dwellings where the standard requirements of the Ontario building Code will provide adequate indoor attenuation and those locations where additional measures are required.

2.5.6 – Noise reports will not be required for industrial/commercial/office developments. In lieu of requiring a noise report the following building component requirements will be imposed as a condition to development:

Prior to the issuance of building permits for Blocks ( ), an acoustical consultant shall certify on the building plans submitted for application approval to the Building Department that the building design for the office and retail areas include double glaze noon opening windows, brick veneer or its acoustical equivalent, and air conditioning system and a suspended acoustical type ceiling.

2.6 – Warning Clauses

2.6.1 – The following minimum wording is to be used in the Subdivision Agreement and in all Offers of Purchase and Sale for the specific lots when noise levels are not being attenuated and the levels exceed the Municipality s and the Ministry of the Environment s noise criteria, but not by more than 5 dBA:

Purchasers are advised that noise levels due to increasing road (rail) (air) traffic may continue to be of concern, occasionally interfering with some activities of the dwelling occupants.

2.6. 2 – When noise attenuation measures have been instituted on the site, and resultant noise levels still exceed the Municipality's and the Ministry of Environment's noise criteria by 5 dBA or less, the following wording is to be used in the Subdivision Agreement and in all Offers of Purchase and Sale for the specific lots:

Purchasers are advised that despite the inclusion of noise control features in this development area and within the building units, noise levels from increasing road (rail) (air) traffic may continue to be of concern, occasionally interfering with some activities of the dwelling occupants as the noise level exceeds the Municipality's and the Ministry of the Environment's noise criteria.

2.6.3 – If the Municipality accepts a noise attenuation solution where the resultant noise level exceeds the Municipality s and the Ministry of Environment s criteria by more than 5dBA, the warning clause in paragraphs 2.6.1 and 2.6.2 must be reworded by replacing the word may with will or as directed by the Area Municipality.

2.6.4 – When forced air heating with provision for central air conditioning is to be installed the following additional paragraph is to be added to the warning clause in 2.6.2:

This dwelling unit was fitted with a forced air heating system and the ducting, etc. sized to accommodate a central air conditioning unit. Air conditioning may be installed at the owner s option and cost.

2.6.5 – Where mandatory air conditioning is to be installed, the following additional paragraph is to be added to the warning clause in 2.6.2:

"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 provincial policies."

2.6.6 – Where berms and/or barriers are being installed on the site the following additional paragraph is to be added to the warning clause in 2.6.2:

That the acoustical berm and/or barrier as installed, shall be maintained, repaired or repaired by the owner. Any maintenance, repair or replacement shall be with the same material, or to the same standards, and having the same colour and appearance of the original.

3.0 – Report format and submission requirements

3.1 – While the technique or techniques used, the data, calculations, and resulting recommendations are the sole responsibility of the consultant, it is appropriate that a reasonable standard report format be utilized to minimize processing delay and facilitate the formulation of requirements to be incorporated within the development agreement.

3.1.1 – In order to expedite processing and approval, the following format should be used for submission within the Region of Peel:

• cover page to clearly identify the Regional and local municipality's file number, the applicant's name and the name of the development if known.
• Introduction to identify noise sources and sources of data utilized. This should include a brief description of on-site conditions together with analytical techniques used. Listing of criteria for sound level limits would be appropriate as well as alternative methods considered for noise mitigation.
• Analysis procedures for on site conditions before barrier to include sample calculations and work sheets for typical and worst-case situations. Summary table to include all predicted noise levels with locations identified.
• Analysis procedures for on site conditions after barrier to utilize the same typical and worst-case situations together with a table of alternative barrier heights. Cross sections of berm barrier configuration to be included for typical and worst-case samples.
• A table illustrating all recommended attenuation measures including building component specifications to be provided with a sketch illustrating affected lots.
• A plan of the affected lots which clearly depicts all information including existing or proposed:

1. Property boundaries
2. Building and/or building envelopes
3. Noise walls, berms and sidewalks
4. Sample receiver locations with cross sections keyed in
5. Other relevant site features