07/2398 - Revised Noise Report and cover letters to referral agencies [As Published] · 132007.2398

RSL Care =
Proposed RSL Retirement Village, Cooroy - Road and Rail Noise Assessment (Revised)

 

4 RAIL NOISE ASSESSMENT
4.1. NOISE PREDICTION METHODOLOGY

The potential impact of rail noise on the proposed development has been determined using the
baseline noise monitoring data set. Typically, noise contour data is provided by Queensland Rail
(QR) identifying the setback distance required for achieving compliance with the Lama 87 dB(A)
criteria. Upon discussion with OR, it was determined that there was no existing noise contour data
available for the relevant section of the Cooroy Railway Corridor, hence the need to rely on the
monitoring data for this assessment.

In order to determine the impacts of train noise and potential mitigation options, modelling of train
noise was completed using the proprietary software package Cadna (Computer Aided Noise
Abatement Model), developed by DataKustik. Cadna incorporates the influence of meteorology,
terrain, ground type and air absorption in addition to source characteristics to predict noise impacts
at receptor locations. The noise modelling also allows investigation of possible noise management
solutions, in the event that non-compliance with the assessment criterion is predicted.

The following section discusses the noise levels at potentially impacted receptors and
recommended noise mitigation options.

4.2. POTENTIALLY IMPACTED RECEPTORS

Hypothetica! receptor positions with a potential to be impacted by noise from rail noise were
selected from current plans of the proposed development. Receptors were placed at worst-case
locations for all buildings. Receptor positions are summarised as follows:

» 5 worst-case receptor positions for each ILU were selected to represent various facades:
Bedroom 1;

Bedroom 2;

Sliding Door opening to Terrace;

Side facade of ILU enclosing the Living/Dining and Kitchen Areas; and

Front facade of ILU enclosing the Living Area.

= 4 worst-case receptor positions (South-East, South-West, North-East and North-West wing) for
the Aged Care Facility at ground and first floor levels;

® 1 worst-case receptor position for the 20 Unit Apartment at ground and first floor; and
« 1 worst-case receptor position for the Community Village building.

Figure 7 presents the ILU building numbers considered in the noise modelling and receptor
positions of all other buildings. As identified on Figure 2, the retirement village is proposed to have
both single-storey and two-storey residential housing or apartments. Noise level predictions assume
a receptor height of 2.0 m and 5.0 m above the existing ground level for ground floor and first floor
housing respectively.

 

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