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News article

Tiwai closure study data - planning and results

The results of the NZAS Detailed Site Investigation report developed by GHD are now publicly available.

GHD Limited (GHD) were engaged by Rio Tinto on behalf of New Zealand Aluminium Smelters Ltd (NZAS) to complete a Contaminated Sites work package at the NZAS Tiwai Point Aluminium Smelter.

In April 2021, NZAS released the sampling plan which detailed 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.

See the NZAS website for the full report (900+ pages), an executive summary and factsheet.

Posted: 15 October 2021

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