Noise Report [As Published] · 132007.2398

ASL Care ==

Proposed RSL Retirement Village, Cooroy — Road and Rail Noise Assessment SS

 

5 RAIL NOISE ASSESSMENT

5.1 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 Lamax 87 dB(A) criteria. Upon discussion with QR, 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.

Section 5.2 discusses the monitoring results associated with train noise for the proposed
retirement village site.

5.2 ASSESSMENT OF MONITORING RESULTS

Based on the noise monitoring data presented in Table 3.3 (Section 3.4), the 24-hour
Laeq Criterion of 65 dB(A) is expected to be achieved at the development site.

Table 5.1 presents the Lamax noise levels measured by Air Noise Environment at the site
boundary adjacent to the Cooroy Connection Road (see Figure 1).

TABLE 5.1: MAXIMUM NOISE LEVELS AT THE DEVELOPMENT SITE BOUNDARY
FRONTING THE COOROY CONNECTION ROAD (dB(A))

 

 

 

Source of Data Lamax (Free-Field)
Continuous unattended monitoring 95.0
Attended noise monitoring of train noise 88.8

 

 

 

 

The attended noise measurements at the boundary of the site have determined that the Lamax
noise level of a passing QRail tilt train is 88.8 dB(A). During the unattended noise monitoring,
the highest Lawax noise measurements determined were 94.0 dB(A) and 95.0 dB(A). These
noise levels may potentially be associated with train horns. Hence, an exceedance of up to
10.5 dB(A) relative to the EPP noise criteria is expected for the portion of the site nearest the
rail line.

The noise levels indicated in Table 5.1 were measured at the site boundary, at a distance of
40 m from the passing trains. Based on noise attenuation calculations, compliance with the
87 dB(A) criterion is predicted to be achieved at a setback distance of 75 m from the railway
line. Therefore, 23 ILU buildings and Apartment 2 exceed the train noise criterion. Mitigation
options are presented in the following sections.

 

AIR NOISE ENVIRONMENT PTY LTD
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