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Mount Druitt Commuter Car ParkReview of Environmental FactorsConsidering the scarcity of native plant species noted above, the heavily disturbed soilconditions, the small size of the vegetated area, the low level of native activeresilience and the poor development of any structural and floristic complexity, it isconcluded that there is no native plant community occurring on the Proposal site. Assuch, the presumed original plant community of CPW, an Endangered EcologicalCommunity (EEC) as per the Threatened Species Conservation Act 1995 (TSC Act) andthe Environmental Protection & Biodiversity Conservation Act 1999 (EPBC Act), doesnot occur on the Proposal site as per the respective definitions of these communities,and therefore a 7-part test is not required under the EP&A Act 1979, or a Referral tothe Commonwealth Environment Department.6.8. Climate change and sustainability6.9. OtherGreenhouse gas emissionsAn increase in greenhouse gas emissions, primarily carbon dioxide, would be expectedduring construction of the Proposal from the transport of materials to site (vehicleemissions) and fuel consumption associated with construction machinery. Indirectgreenhouse gas emissions as a result of the Proposal would include emissionsembodied in the building materials used, particularly steel and concrete. Due to thescale of the Proposal and the temporary nature of construction works, greenhouse gasemissions resulting from construction are not expected to be significant. Furthermore,with the application of standard mitigation methods (refer Section 7) greenhouse gasemissions generated during construction of the proposed car park would be kept to aminimum.The operation of the Proposal is expected to lead to higher use of public transport andtherefore decreased use of private motor vehicles by commuters. Such a mode shiftwould reduce the amount of fuel consumed by private motor vehicles and thus wouldresult in a relative reduction in associated greenhouse gas emissions.Climate changeThe effects of climate change on the region in which the Proposal is located can beassessed in terms of weather changes, storm intensity, flooding and increased risk offire. Climate change has the potential to change weather patterns within the Sydneyregion in the form of:Temperature increases;Precipitation decreases;Increase in intensity of rainfall events; andIncrease in fire weather frequency.Increased temperatures within the Sydney region, in conjunction with decreasedprecipitation, are unlikely to have an impact on the operation of the facility.6.9.1. Hydrology and water qualityThe existing ground floor levels generally have a slight fall towards North Parade. Theexisting site stormwater system discharges at the southwest corner of the site to thecouncil stormwater system via a direct pipe connection to an existing pit in NorthParade.KMH-2010123a REF Rev 4 doc. Page 72 of 116Status: Final
Mount Druitt Commuter Car ParkReview of Environmental FactorsThe existing site building structure including the majority of the existing stormwatersystem would be demolished and removed to allow construction of a new structure.A series of above ground On Site Detention (OSD) storage tanks would be providedwithin the site possibly at the north-west corner or at ground level under the ramps toreceive the runoff from the roof parking and meet the storage criteria for the building.Rainwater from the open roof parking would be directed to grated full bore floor drainswhich are connected to downpipes attached to the columns and to the ground levelOSD tank.The OSD would be fitted with a Discharge Control Pit (DCP) with screens and orificecontrol to limit the outflow.The access roadway to the proposed car park would be graded towards North Paradeand runoff would be collected in conventional inlet pits and diverted to the Councilstormwater system. Landscaped areas around the ground floor parking fall into thesite. Runoff from these areas is likely to be piped directly to Council‘s stormwater.Rainwater outlets would be fitted with grated inlets. The DCP from the OSD would beprovided with a screened outlet. All grated drains located in pathways would besuitable for the passage of wheelchairs.Gross pollutant trap and oil separators would be installed downstream of the DCPbefore discharge to council stormwater system.6.9.2. Ground contaminationA Phase 1 Preliminary Contamination Assessment for the site was undertaken by ADEnvirotech and is attached as Appendix F. The results of the investigation concludedthat there is a low to moderate risk of contamination at the Proposal site.The main potential contamination receptors include site visitors, drainage though thesite, atmospheric transportation and deposition, surface water runoff and storm waterdrainage, downward migration and leaching via infiltration of rain water into the soiland lateral migration via groundwater.A review of historical aerial photographs revealed that the site has been used forpredominantly commercial purposes. No acid sulphate soil risk maps exist for the siteindicating the site appears to contain no known occurrences of acid sulphate soils.A search of DECCW Contaminated Land Management Database revealed that norecords have been issued against the Proposal site. A search of the Stored ChemicalInformation Database and the microfiche records held by WorkCover NSW did notlocate any records pertaining to the Proposal site.A visual examination of the site surface revealed no hydrocarbon staining. Asbestoscement debris was observed in the following locations;The south-western corner opposite the uncontrolled stockpile (possibly a formerTelstra pit);Inside the switch room under the stairs facing the southern boundary; andAlong the pit running east-west immediately in front of the switch room under thestairs.Building fabric within the structure may also potentially contain asbestos or otherhazardous materials. Polychlorinated biphenyls PCBs are presumed to exist within thecapacitors of the light fittings, while asbestos may be detected with bituminousmastics.Twenty soil samples were taken to test for petroleum hydrocarbons, benzene, toluene,ethyl-benzene, xylenes, metals, polyaromatic hydrocarbons, polychlorinated biphenyls,KMH-2010123a REF Rev 4 doc. Page 73 of 116Status: Final
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MOVEMENT SUMMARYMt DruittSouthern C
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Appendix AReport Number610.08297Pag
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