Opus International Consultants (NSW) Pty Ltd - Transport for NSW ...

Commuter Car Park and Interchange Program 6 Report Number 610.08297Mount Druitt Commuter Car Park29-Nov-2010Noise and Vibration Impact Assessment Revision 1The car park will be operational 24 hours per day. However, it is anticipated that the hours duringwhich the car park would receive its greatest use would be similar to peak commuter times, namelybetween 6.00 am and 9.00 am and between 4.30 pm and 7.30 pm Monday to Friday. As aconservative assumption for this assessment, it has been assumed that the car park would be fullyutilised during its operational stage and that half of the car park would fill up during the first hour of themorning peak period.The area is currently exposed to noise emissions from road traffic on the busy North Parade andadjoining local streets as well as train noise from operations on the adjacent railway line.2.2 Existing Ambient Noise LevelsIn order to establish the ambient noise levels in the area, an operator-attended noise survey wasconducted at the monitoring locations presented in Figure 1, in accordance with the proceduresdescribed in AS 1055-1997, “Acoustics – Description and Measurement of Environmental Noise”.The measurements were carried out using a Brüel & Kjær Type 2260 Sound Level Meter (serialnumber 2414605) during the daytime period on 5 October 2010, between 3.15 pm and 4.30 pm. Theresults are provided in Table 1 referencing the locations shown in Figure 1.Table 1Attended Noise Measurement ResultsMeasurement LocationAmbient Noise Level LA90 (dBA)(a) Mount Street 50(b) Cnr Beames Ave and Dixon Street 473 PROPOSED CONSTRUCTION WORKSThe construction works associated with the proposed commuter car park will consist of the followingmain activities:Demolition.Earthworks to level and grade the site.Construction of the car park.In order to minimise the potential noise and vibration impacts upon nearby sensitive receivers,construction works are proposed to be undertaken during standard daytime periods (7.00 am to6.00 pm Monday to Friday and 8.00 am to 1.00 pm on Saturdays). The proposed demolition,excavation and construction works will be undertaken using standard plant and equipment frequentlyused on many other similar sites.In order to assess the potential noise and vibration impacts during construction, a number of scenarioscomprising typical plant and equipment have been developed. These are summarised in Table 2.Heggies Pty LtdA member of SLR Group