Response to Information Request_18-04-12 · MCU12/0023

Ms Leanne Simpson, JFP                                                     18/04/12
Re: Essence of Peregian – Noise response                          L08712/PAK/09-047

Response:

The measured background noise level at Peregian during the assessment to 10pm
was 47.7 dB(A) average. This was recorded on a night will general calm wind
conditions. I adopted 44 dB(A) for the period 10pm to 12 MN on the basis of various
assessments I have conducted at Coolum, Noosa and other coastal locations.
Recently, measurements at a site on David Low Way at Coolum showed that the
ambient noise level between 10pm and 12 MN was approximately 3 dB(A) lower than
the L90 prior to 10pm.

Given the coastal location with surf noise being the predominant influence on the
ambient noise environment, it is common that ambient background noise levels
decay very little during the night. The adoption of 47 -3 = 44 dB(A) is considered an
appropriate and conservative assessment method.




Response:

If I adopt a background plus 3 dB(A) criterion for noise assessment after 10pm. The
noise criterion reduces to 44 + 3 = 47 dB(A) rather than the 49 dB(A) adopted
previously.

The predictions at the nearest residence to the southeast with regard to the northern
dining area provided in the DA noise report were rounded up to be conservative.

The predictions for the scenario of the 30 m2 outdoor dining area closed after 10pm
with the northern 40 m2 outdoor dining area in use and restaurants trading with doors
open results in a noise level of:

46.5 + 39.6    =      47.3 dB(A) at the nearest residence to the south east.

Hence this complies with the 47 dB(A) criterion using background plus 3 dB(A)
criterion nominated by Council.

Further, noting that ambient L10 levels at already at and above 47 dB(A) thus
potential impact is minimal.

Residence to North

The previous predictions at the residence to the north of the hotel were a resultant
noise level from the northern outdoor dining area plus restaurant noise emissions of:

Offset 90 metres

Source 55 @ 30 metres LAMax,adj



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