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

Mount Druitt Commuter Car ParkReview of Environmental Factorsorganochlorine pesticides, cyanide and phenols. Five samples were tested forasbestos.The criteria specified in the following publications were used for the site assessmentand classification of soil for disposal purposes:Guidelines for Assessing Service Station Sites, NSW EPA 1994;Guidelines for the NSW Site Auditor Scheme, NSW EPA 2006, 2nd Edition;National Environmental Protection Measure, 1999 (NEPM); andWaste Classification Guidelines - Part 1: Classifying Waste, NSW DECCW, April2008.Soil samples were assessed against the Health-based Investigation Levels (HILs)assigned for commercial or industrial properties (NEHF F), Provisional PhytotoxicityInvestigation Levels (PPILs), criteria assigned for General Solid Waste (CT1) andthreshold concentrations for sensitive land use.One soil sample yielded a concentration of nickel above the DECCW ProvisionalPhytotoxicity-based Investigation Levels (PPIL). However, considering that:The site inspection did not reveal any plants under stress within the Proposal site;The proposed development is a commuter car park;In some instances background nickel concentrations in soil can be as high as 500mg/kg; andThe elevated concentrations of the above metals are only marginally above theProvisional Phytotoxicity-based Investigation Level.The elevated nickel concentration can be considered acceptable for the site in regardsto the PPILs.Given the above findings a number of mitigation measures are proposed in Table 7.1.6.9.3. Cumulative impactsCumulative impacts may result when a number of construction or developmentprojects are undertaken concurrently and in close proximity to one another. Impactsfrom both construction and operational activities may combine to have a moresignificant impact on the surrounding area than would be the case if they were to beundertaken in isolation.The CCPIP includes a number of proposed car park developments on CityRail‘sWestern Line including Seven Hills, St Mary‘s, Schofields, Quakers Hill, andWerrington. Within the Mount Druitt retail and business precinct there are no knowndevelopments that are likely to coincide with the Proposal.Cumulative issues are unlikely to occur in terms of the bio-physical environment due tothe generally low risks posed by the proposals to their surroundings and the highlyurbanised context in which they are to be built; however, there is potential forcumulative impacts of disruption and inconvenience to rail commuters and adjacenttransport facilities if not properly managed.Traffic and transport impacts, including to rail commuters and pedestrians, have beenconsidered as part of the concept design and mitigation measures specified to reducethese risks. A particular focus needs to be maintained on this issue duringconstruction to ensure that minimal inconvenience is caused and cumulative impactsare not sustained. A complaints management system with specified response timesKMH-2010123a REF Rev 4 doc. Page 74 of 116Status: Final