MCU16/0079 Appendix F - Environmental Noise Imact Assessment

Continuous activity noise source levels have been compiled from similar previous investigations. All
noise levels have been corrected for impulsiveness or tonality as per Australian Standard
AS 1055:1997 – “Acoustics-Description and measurement of environmental noise”.

It should be stressed that mechanical plant requirements for the proposed alterations and extensions
are not yet known, for this reason; we have applied noise levels from other similar sites as follows:

    Commercial air-conditioning condenser units x 2 (each unit at 60 dB(A) at 3m) located at the
     existing rooftop deck; and
    Basement exhaust fan x 1 (at 66 dB(A) at 3m) located along the northern site boundary.

Based upon the assumed locations of the new onsite mechanical plant in relation to the nearest offsite
noise sensitive receivers (building façades and inside rooms with windows open), we predict the
following noise impact levels as presented in Table 8.

As noted previously, for the receivers across the river we have assumed the typical minus 6 dB per
doubling of distance noise reduction to the nearest edge of the river and no distance attenuation over
the river given that water is typical a hard reflective surface.

The predicted levels assume that the recommended treatments detailed in Section 6 are incorporated
into the development.

                                                        Predicted Noise Impact, SPL Leq dB(A)
 RSL Continuous Noise Source
                                                    Nearest Façade              Inside Windows Open
 R1: Dwellings Due South across Doonella Street
 Combined mechanical plant                                  36                         28
 R2: Dwelling Due East across Pelican Street
 Combined mechanical plant                                  34                         24
 R3: Dwelling Due East across River
 Combined mechanical plant                                28                           20
 7am to 10pm Criterion                                  41 / 41                        35
 10pm to 7am Criterion                                    34                           30


        Table 8: Predicted onsite mechanical plant noise impacts at noise sensitive receivers.

For offsite noise sensitive receiver locations refer to Figure 2 in Appendix A. For point source
calculations refer to Appendix C of this report.




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