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Preliminary Site Investigation at63 North Pde, Mt Druitt NSW A. D. Envirotech Australia Pty LtdData CompletenessThe following table provides the summary of the data validity:Table 15 Summary of DQO reconciliationQA/QC ItemDQO Valid Not Valid Completeness ConclusionCriteria Data DataLaboratory duplicate samples 95 % 83 0 100 % AcceptableLaboratory blank samples 100 % 77 0 100 % AcceptableLaboratory spike/surrogate recoveries 95 % 87 0 100 % AcceptableBlind replicate samples 95 % 15 1 94 % NotAcceptableSplit samples 75 % 16 0 100 % AcceptableRinsate sample 75 % 8 0 100 % AcceptableTrip blank sample 95 % 33 1 97 % AcceptableVOC spike 75 % 4 0 100 % AcceptableTotal: 323 2Overall Completeness: 95 % 99.3 % AcceptableThe blind replicate sample collected on the same day exhibited a reasonable level ofreproducibility (RPD < 50%) for all analytes, excluding zinc. The sample exhibited the LowLevel of Agreement for zinc, ultimately affecting the overall target for blind replicate samples.Considering that zinc in soils did not yield concentrations above the acceptance criteria, it is theauthor‟s opinion that the EnviroLab result can be accepted and, therefore, no further investigationof soil with regard to zinc is warranted.The ratio of the valid data to the total number of the analyses conducted in the QA/QC programyielded 99.3 %. It appears that the data collected in the course of the investigation meets thetarget result for the completeness of the QA/QC program stated in the DQOs (95%).4224 63 North Pde Mt Druitt PSI.v1 final Page 49
Preliminary Site Investigation at63 North Pde, Mt Druitt NSW A. D. Envirotech Australia Pty Ltd12 CONCLUSIONSBased on the data and evidence collected in the course of the investigation, the followingconclusions can be made:Site History Appraisal and Site InspectionThe site has predominantly been used for commercial purposes, including a car park andcinema complex.A search of the sites listed by the NSW DECCW under the Contaminated Land ManagementAct 1997 revealed that no records have been issued against the subject site.A search of the Stored Chemical Information Database (SCID) and the microfiche recordsheld by WorkCover NSW has not located any records pertaining to the subject site.No ASS Risk Maps are available for the subject site, therefore the site appears to contain „noknown occurrences of acid sulphate soils‟.The Section 149 Certificate does not reveal any significant land contamination, managementorders, approved voluntary management proposals, ongoing maintenance orders, or site auditstatements for the subject site.No visible signs of hydrocarbon contamination were observed on the surface of the site.Visual examination of the car park surface revealed no hydrocarbon staining.Asbestos cement debris was observed on the concrete surface in the following locations:oooSouth western corner opposite uncontrolled stockpile (possibly a former Telstra pit);Inside switch room under stairs facing southern boundary; andAlong pit running east-west immediately in front of the switch room under stairs.The building fabric within the remaining concrete structure may potentially contain asbestosor other hazardous materials may potentially contain hazardous materials.Site Contamination InvestigationThe site meets the NSW DECCW Health-based Investigation Levels (criteria NEHF F) withregard to arsenic, cadmium, chromium, copper, lead, mercury, nickel and zinc; petroleumhydrocarbons; benzene, toluene, ethyl-benzene and xylene; polyaromatic hydrocarbons;polychlorinated biphenyls, organochlorine and organophosphate pesticides, phenols, andcyanide.The site meets the NSW DECCW Provisional Phytotoxicity-based Investigation Levels withregard to arsenic, cadmium, chromium, copper, lead, mercury, and zinc.Sample 4224-4A yielded a concentration of nickel above the PPILs. However, consideringthat:4224 63 North Pde Mt Druitt PSI.v1 final Page 50
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MOUNT DRUITT COMMUTER CARPARKREVIEW
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Mount Druitt Commuter Car ParkRevie
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Commuter Car Park and Interchange P
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Mount Druitt Commuter Car ParkTraff
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Transit services provided at Mount
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Attachment 1: Origin Destination Su
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MOVEMENT SUMMARYMt DruittSouthern C
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MOVEMENT SUMMARYMt DruittNorth Para
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MOVEMENT SUMMARYMt DruittNorth Para
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MOVEMENT SUMMARYMt DruittJirrang Cl
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MOVEMENT SUMMARYMt DruittJirrang Cl
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MOVEMENT SUMMARYMt DruittMount St /
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MOVEMENT SUMMARYMt DruittMount St /
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MOVEMENT SUMMARYMt DruittSherbrooke
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MOVEMENT SUMMARYMt DruittSherbrooke
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KMH-2010123a REF Rev 4 docStatus: F
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Commuter Car Park Mt DruittVisual I
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Appendix AReport Number610.08297Pag
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