132003.221132 (23616DA) - Doonella Estate - Road Traffic Noise Assessment Report

4.2 Summary of Criteria

Based on the measured Lso(8hour) of 34.6 dB(A) and the measured L9o(! 8hour) of 49.8 dB(A) (see
Table 3.1), the relevant road traffic noise criteria to be met are:

© The QDMR external criteria of 57 dB(A) Lio(|8hour) free field (60 dB(A) Lio(I8hour) |
metre from the building facade);

e The QDMR nominate that the formal external open space is the private or communal
recreational area of a development “required” by local government. The noise level limit of
60 dB(A) Lio(| 8hour) free field (63 dB(A) Lio(!8hour) | metre from the building facade) will
apply to formal external open space on the subject site;

e Where the external limits are not practically achievable the design should meet the
recommended internal design levels nominated in AS2107 (and Table 4.1 of this report);

@ The QDMR nominate that the noise level limit of 63 dB(A) Lio(| 2hour) free field will apply
to parks, outdoor educational and recreational areas on the subject site;

e The Noosa Shire Council recommends that new developments be assessed under the
Environmental Protection Policy (Noise). The relevant road traffic noise criteria from the EPP
(Noise) states that proposed residential developments must achieve an Lio(18 hour) 63
dB(A) | metre from the most exposed facade of a noise sensitive place; and

e 60 dB(A) assessed as the highest | hour equivalent A-weighted sound pressure level
between 10 pm and 6 am.

Table 3.1 shows that the maximum Leq(| hour) daytime noise level is 1.4 dB(A) below the Lio(I8
hour) noise level and the maximum Leq(| hour) night time noise level is approximately 7.4 dB(A)
below the Lio(|8 hour) noise level. Therefore the Lio(|8hour) noise level goal is the most difficult
criterion to achieve. As a result if the Lio(|8hour) noise level goal of 60 dB(A) | metre from the
building facade is met for the subject site then all other noise criteria would be achieved.

The noise levels referred to in the remainder of this report include a fagade correction except where
noted.

5 Traffic Noise Model

The Queensland Department of Main Roads (QDMR) recommends that the prediction of road traffic
noise is to be conducted according to the United Kingdom Department of Transport (1988)
procedure published as “Calculation of Road Traffic Noise” (CoRTN88). The QDMR require that
predictions of road traffic noise is carried out for a ten year planning horizon at one metre from the
most exposed dwelling facade.

The traffic noise modelling was based on plans of the site supplied by PMM Group Pty Ltd, and
addresses the road traffic noise from Beckmans Road.

3052R01V03.doc Proposed Residential Subdivision Beckmans Road, Tewantin Lensworth Lake Doonella Pty Ltd c/- PMM Group Pty Page 5

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