20200903OBA_R1_Loading_Dock_Operational_Conditions · OPW20/0145

5 NOISE SOURCES/IMPACTS

The following sections outline current major noise sources that were identified upon the previous site visit
to have potential impact on site.

5.1 LOADING DOCKS
5.1.1 Trolley Collection

During time on site, it was observed that trolley activity is a regular occurrence across both loading docks.
Noise level that was measured in relation to noise produced by trolley activity was 69 dB(A) Leg. Trolley
collections is understood to only occur during day and evening periods (i.e. 7am to 10pm) which is also
considered in this assessment.

5.1.2 Delivery Trucks

It was observed that small to medium sized delivery trucks were present within the loading docks during
time of site visit with no more than 1 truck in each hour at the loading docks. As advised by the client, we
note that the loading dock operational hours start at 3am and can run up to 10pm. Truck (incl. refrigeration
truck) idling was only assumed to occur in the loading dock during nominal 15minute loading period, and
not along the boundaries or at the entrance to the loading docks. Where trucks enter the site to wait for
loading and generally during loading (unless short-time drop-off/pick-up), engines must be turned off and
in case of refrigeration trucks, these should just come in and leave site after loading as no idling would be
allowed at other times. Such restrictions should be included if not yet followed (e.g. signs installed at the
entry and along the boundaries and within the shopping centre loading docks).

5.1.3. Mechanical Plant
The following mechanical plant was observed and noted in Figure 2.

e Eastern Loading Dock Plant deck above loading dock ‘5’ emitting a calculated sound power level
of 93dB(A).

e Kitchen exhaust sound power level of 99dB(A).

e Western Loading Dock - Plant room/exhaust adjacent loading dock ‘2’ were measured and
calculated to have a sound power level 90 dB(A).

Other plant is generally located on the rooftop of the shopping centre and therefore, providing significant
noise shielding. In any case, the assessment is based on a sound power level of 90dB(A)

At night, our predictions are based on kitchen exhaust fan being turned off together with other plant
adjacent to loading docks.

No other mechanical plant was considered and located during site inspections. In case of additional other
plant, these must operate to ensure that the Loo background noise levels at the future residential buildings
are not exceeded.

5.1.4 Compactor

A compactor was noticed located by the ‘Big W’ loading dock 3 with an assumed Lmax Sound power level of
100 dB(A). Compactor operation has been excluded from night time assessments as it should only operate
between the hours of 7am and 6pm.

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