POR3 is located at the west property line and assumes that a truck is backed into a westmost parking spot (either north or south). The noise assessment is performed at the west property line.
The daytime and nighttime period impact heights are modelled at 1.5 meters to represent the outdoor points of reception at the property line.
Assessment Approach
A noise propagation model to predict the noise levels at the representative locations was created to determine the extent of the noise control measures required (if any). The input data used to calculate the predicted sound level exposures at the selected locations on the property line, and the resulting outputs, are given in Appendix E: Predictor Output Results.
To predict the noise impacts at the property line locations, three scenarios were evaluated. The differences in these scenarios is the route that the truck enters and leaves the parking area as well as the location and orientation of the idling truck during pickup and drop off of trailers.
Three scenarios have been evaluated. These include:
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Scenario 1: Truck enters lot and parks/retrieves trailer from the most south east parking location.
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Scenario 2: Truck enters lot and parks/retrieves trailer from the most north west parking location.
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Scenario 3: Truck enters lot and parks/retrieves trailer from the most south west parking location.
Various development layouts were evaluated to determine the nearest possible parking location to the west property line in order to meet the performance requirements set out by the City of Windsor. To achieve the requirements, it should be noted a 1.65 metre noise barrier or earth berm is required, located 6.1 metres from the west property line. Also, the nearest possible parking location to the west property line cannot be closer than 12.2 metres. It should be noted that for scenario 1, when a truck is either parking or picking up a trailer from the south parking spots, the trailer will act a barrier for the noise at the south property line.
Table’s 3a through 3f are the Noise Impact Tables during the daytime and nighttime periods. The purpose of these tables is to present the predicted noise emission levels that the applicable noise sources, identified as significant in the Noise Source Summary Table (Table 2), have at the identified points of reception. The software used to predict the noise levels is the Brüel & Kjær Predictor Type 7810 software, which complies with the procedures specified by ISO 9613. As such, the prediction model considers the sound level attenuation of the inputted sound power data with distance as well as any attenuation provided by shielding, absorption etc. Any assumptions used in the development of the noise propagation model, including source heights, operating hours and duty cycles, acoustic ground absorption coefficient, etc. have been included in Appendix C.