20211104OBA_R2_Information_Request_Response - Acoustic RF · MCU21/0146

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[OCR of page images]
5.3.2 Preliminary Onsite Mechanical Plant Noise

A preliminary assessment of the mechanical plant onsite to the nearest sensitive receivers has been carried out
with the results presented in the following sections.

Note the noise impacts consider building screening, distance attenuation, and barrier attenuation. Additionally
source noise levels included correction due to tonality and impulsiveness as per Australian Standard AS1055: 2018.

The assessment was based on the following assumptions:

e Each unit has a single condenser unit;

e The condenser unit has a sound power level of SWL 63dB(A) Leq;

e The mechanical plants are located in the plant rooms shown in the attached plans;

e The plant rooms are fully enclosed with minimum Rw50 walls, and only one side of the plant room is
open for ventilation.

Table 18 - Predicted Mechanical Plant Noise Impacts at Receiver 1: 60 Hofmann Drive

 

 

 

 

 

 

 

 

 

 

Building No. Single Predicted Criteria Compliance
Condenser condenser Noise (Night)
Units unit SWL Impacts
Leq dB(A)

A 36 30 dB(A) Yes
B 36 68 dB(A) 30 dB(A) Yes

39 dB(A)
C 30 29 dB(A) Yes
Total 96 - 35 dB(A) Yes

 

 

 

 

 

 

 

 

Based on the noise impacts presented in Table 18, mechanical plant noise from the site is predicted to comply
with the nominated noise criteria at the closest sensitive receivers.

Note, the mechanical plant noise assessment and predicted noise is preliminary only and shall be reviewed
at a the building approval stage once details of the plant are available once all plant is selected and the

detailed design of all plant is carried out.

IMobs\2021\202 10208\202 10208.3\20210923JJMA_R4_Development_Application_.docx 51