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

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‘CONSULTING ENGINEERS

3 Existing Noise Levels

ASK Consulting Engineers carried out a noise survey at Location A, to the west of the subject site, on
27 February 2004. Location A is shown in Figure 2A.

The noise survey was carried out to the west of the subject site at Location A as a secure site for the
noise logger was not available on the subject site. The nature of Beckmans Road adjacent to the
subject site and Location A is similar. Beckmans Road is a two-lane road and the road surface is chip
seal adjacent to the subject site and Location A. The sign posted traffic speed is 60 km/h and 80 km/h
adjacent to the subject site and location A respectively. The difference in sign posted traffic speed has
been accounted for in the road traffic noise model. The nature of the terrain at Location A is
considered to be representative of the terrain on the subject site. Therefore the verification of the
road traffic noise model at Location A is considered to be acceptable.

The road traffic noise level survey carried out at Locations A is free field. Noise monitoring Location
A is approximately 10m from the edge of Beckmans Road.

Monitoring was undertaken using a calibrated ARL noise logger. The logger was configured to obtain
statistics over 60 minute periods. The weather was fine and clear.

Appendix A illustrates the noise levels recorded at Locations A. The noise levels obtained are
expressed in terms of the Lmax, Leq, Lio, and Loo. The Lia and Lso are respectively the A-weighted
noise levels exceeded 10%, and 90% of the time. The L9o is commonly referred to as the background
noise level. The Leg is the energy average noise level containing the same acoustic energy as the actual
fluctuating noise level. The Lmax is the adjusted average maximum noise level.

Table 3.1 shows a summary of the noise levels measured at Location A. Typical noise sources at
Location A include road traffic noise from Beckmans Road.

 

 

 

 

 

 

 

 

 

 

 

 

Table 3.1 Noise Level Measurement Summary
Start Date Noise Level Parameter dB(A)
L10(1 8hour) Maximum Maximum Night L9o(8hour) L90( 1 8hour)
dB(A) Daytime Time dB(A) dB(A)
Leq(I hour) Leq (1 hour)
dB(A) dB(A)
69.9 68.5 62.5 34.6 498
27/2/2004
(06:00 — 00:00) (06:00 — 22:00) (22:00 - 06:00) | (22:00 - 06:00) (06:00 — 22:00)
Note: Noise level measurements are free field.

Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

The measured L1o(18 hour) noise level at Location A is 69.9 dB(A).

3052R0|VO3.doc Proposed Residential Subdivision Beckmans Road, Tewantin Lensworth Lake Doonella Pty Ltd ¢/- PMM Group Pty Page 2

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