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

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Preliminary Site Investigation at63 North Pde, Mt Druitt <strong>NSW</strong> A. D. Envirotech Australia <strong>Pty</strong> <strong>Ltd</strong>5 POTENTIAL CONTAMINATION TYPES AND RECEPTORS5.1 Potential Contamination TypesThe following potentially contaminating types <strong>for</strong> the subject site (in decreasing order of probability)were identified:petroleum hydrocarbons, benzene, toluene, ethyl-benzene, xylenes (as the site was accessed byvehicles),heavy metals and metalloids (areas of uncontrolled fill imported and proximity to the Railcorridor and North Parade),asbestos (extensively used throughout the construction industry and may have been used instructures on site),polyaromatic hydrocarbons (PAHs) and phenols (being associated with waste oils),polychlorinated biphenyls, (if electrical equipment containing PCBs was dumped at the site inthe past),cyanide (areas of uncontrolled fill imported); andorganochlorine (OCP) and organophosphate (OPP) pesticides (may have been <strong>for</strong>merly appliedon site).These are potential sources of contamination that may migrate to or be found on the site.5.2 Primary <strong>Transport</strong> MechanismsPrimary transport mechanisms <strong>for</strong> the migration of potential contaminants on to the site or off the siteinclude:Drainage from the immediate area and Mount Street and North Parade, though the site.Atmospheric transportation and deposition;Surface water runoff and storm water drainage;Downward migration and leaching via infiltration of rain water into the soil; andLateral migration via groundwater.5.3 Potential Contamination ReceptorsThe main potential contamination receptors were considered to include:Site visitors, adjacent property owners/users who may come into contact with contaminatedsoil or dust arising from soil disturbance activities,Ropes Creek;Local groundwater.4224 63 North Pde Mt Druitt PSI.v1 final Page 23

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