Closure study data - planning and results
NZAS has engaged GHD, an international environmental consulting firm, to conduct an assessment of any potential contamination of soil and groundwater across the site.
In April 2021, NZAS has released the sampling plan which details the areas where GHD determined we should do extra testing as part of the Closure Study, and why those areas were selected.
In October 2021, NZAS released the Detailed Site Investigation report developed by GHD.
- NZAS Detailed Site Investigation - Executive Summary
- NZAS Detailed Site Investigation - Full report (900+ pages)
- NZAS Detailed Site Investigation - Fact Sheet
In April 2022, NZAS released its Preliminary Closure Study. This document outlines the key work programmes that will be undertaken to remediate the Tiwai Point site as part of any future closure.