d67afa44-b56f-5165-87cd-e2e46a163df9 eng utf8 dataset custodian NIWA National Institute of Water and Atmospheric Research +64 4 386 0300 voice +64 4 386 0574 facsimile 301 Evans Bay Parade Hataitai Wellington 6021 New Zealand curator@niwa.co.nz http://www.niwa.co.nz Website of the National Institute of Water and Atmospheric Research, New Zealand - Enhancing the benefits of New Zealand's natural resources. Data curator 2015-06-12T11:27:32 creation ISO 19115-3 urn:ogc:def:crs:EPSG::4326 OGP NZST/NZDT Wellington Airport Runway Extension: Marine sediments and contaminants (Lyall Bay) 2015-06-11T01:23:00 creation 2015-06-11T01:23:00 revision Wellington International Airport Limited (WIAL) propose to lengthen the existing runway from approximately 1950 m to at least 2300 m. This would be achieved by extending the current runway area into Lyall Bay, Wellington. Sediment sampling and chemical analyses were performed. All contaminant levels were well below ANZECC sediment quality guidelines. Contaminant concentrations in Lyall Bay surficial sediments were very low and uniformly distributed across the study area, including at sites most likely to be disturbed by construction activities. Mobilisation of sediment from 0-0.2 m depths from within the area of the proposed runway extension is not expected to result in any significant increase in sediment contaminant concentrations in surrounding areas. From a contaminant perspective, the risk of adverse effects on the water column from transient sediment suspension/disturbance events during construction is very low given that water column concentrations, even after allowing for reasonable mixing, are estimated to be at least two orders of magnitude lower than default ANZECC water quality trigger values. The objective of this study of sediment physical and contaminant properties was to establish baseline conditions prior to the runway extension and to characterise the wider environs in Lyall Bay in order to evaluate potential impacts of the proposed engineering development on the seafloor environment. Greg Olsen, Craig Depree, Scott Nodder, Peter Gerring (NIWA) with funding from Wellington International Airport Limited. Contaminant data were generated by accredited laboratories-Asurequality and Hills Laboratories. completed pointOfContact NIWA Craig.Depree@niwa.co.nz Craig Depree Group Manager coInvestigator NIWA Greg Olsen Principal Technician coInvestigator NIWA Scott Nodder Principal scientist vector environment Wellington Region, Lyall Bay 176.564062,-40.811110 176.211252,-40.659210 175.268221,-40.768713 174.851416,-40.628590 174.603476,-40.895861 174.412973,-41.469383 175.424440,-41.795172 176.054712,-41.493254 176.564062,-40.811110 174.412973 176.564062 -41.795172 -40.628590 2014-08-01T00:00:00 2015-02-10T00:00:00 Lyall Bay Wellington Sediment Contaminant Grain size PAHs Polycyclic aromatic hydrocarbon heavy metals Arsenic DDTs organochlorine pesticides TOC elutriate testing nutrients sulphides WIA15301 theme NIWA Project Codes 2012-01-01 publication NIWA_ProjectCode Access to NIWA Personnel only. Data owned by Wellington International Airport Ltd. Permission required to use elsewhere. Access to NIWA Personnel only. Data owned by Wellington International Airport Ltd. Permission required to use elsewhere. Access to NIWA Personnel only. Data owned by Wellington International Airport Ltd. Permission required to use elsewhere. Contact Craig Depree (NIWA) for permission to access. confidential eng https://dc.niwa.co.nz/niwa_dc/srv/metadata/d67afa44-b56f-5165-87cd-e2e46a163df9 WWW:LINK-1.0-http--metadata-URL Point of truth URL of this metadata record dataset Wellington International Airport Ltd. extension sediment dataset Data owned by Wellington International Airport Ltd. restricted