Transitioning Our Approvals

We are continuing to transition the environmental approvals for our mining operations to more contemporary assessment processes.

We started this in 2020 with the referral of the future Myara North and Holyoake mine regions of our Huntly Mine for environmental assessment in accordance with State and Commonwealth regulations.

Environmental Assessment Processes

Both State and Commonwealth regulators play an important role in assessing the identification and management of environmental impacts.

In WA, environmental assessments are managed by the Environmental Protection Authority (EPA) who makes assessments on matters where there are significant environmental impacts.

The Commonwealth will also assess a proposal where it impacts certain nationally significant animals, plants, habitats or places.

Sometimes proposals can be assessed under accredited assessments where the Commonwealth authorises the State authority to assess the proposal and the Commonwealth Minister then utilises the State’s report to decide whether to approve it.

Our future Huntly mining and Pinjarra refining activities are being assessed through a combination of accredited assessments and standalone Commonwealth and State approvals processes.

Under the accredited assessment process, the project will be assessed at the highest level - being a Public Environmental Review. This will include a 10-week public comment period which we anticipate will occur in early 2025.

The Commonwealth regulator is currently determining the level of assessment for the O’Neil mine region, which will not be assessed under the accredited assessment process.

Understanding our impacts

As a part of the accredited assessment process, we are preparing an Environmental Review Document (ERD) to submit to the regulators.

The ERD describes the proposed future activities, potential impacts on the environment and the measures which will be used to mitigate those impacts. This is informed by extensive studies, which include:

Surveys to identify and record data on the location, diversity and health of species. This includes conservation significant flora and threatened species such as black cockatoos and chuditch.

Surveys to identify areas of spiritual, historical, scientific, aesthetic and social values – including recreation areas, tracks and trails.

Baseline monitoring and studies to assess and understand water quality, quantity and movements of both surface and groundwater.

Assessment of potential emissions from mining and refining operations.

Accredited assessment process and timeline

Below is the process the EPA follows in determining the outcome of an environmental assessment and an indicative timeline for assessment of Alcoa’s proposal.

Ministerial decisions Appeals process Alcoa prepares responsesto submissions EPA's assessmentand recommendationspublished Public comment on theEnvironmental ReviewDocument Level of assessment isset by regulators Alcoa undertakes studies andprepares the EnvironmentalReview Document COMPLETE Alcoa refers Proposalto regulators COMPLETE 2024 Q1 2026 2025 Updated August 2024Subject to change

Transitioning Our Approvals

We are continuing to transition the environmental approvals for our mining operations to more contemporary assessment processes.

We started this in 2020 with the referral of the future Myara North and Holyoake mine regions of our Huntly Mine for environmental assessment in accordance with State and Commonwealth regulations.

Environmental Assessment Processes

Both State and Commonwealth regulators play an important role in assessing the identification and management of environmental impacts.

In WA, environmental assessments are managed by the Environmental Protection Authority (EPA) who makes assessments on matters where there are significant environmental impacts.

The Commonwealth will also assess a proposal where it impacts certain nationally significant animals, plants, habitats or places.

Sometimes proposals can be assessed under accredited assessments where the Commonwealth authorises the State authority to assess the proposal and the Commonwealth Minister then utilises the State’s report to decide whether to approve it.

Our future Huntly mining and Pinjarra refining activities are being assessed through a combination of accredited assessments and standalone Commonwealth and State approvals processes.

Under the accredited assessment process, the project will be assessed at the highest level - being a Public Environmental Review. This will include a 10-week public comment period which we anticipate will occur in early 2025.

The Commonwealth regulator is currently determining the level of assessment for the O’Neil mine region, which will not be assessed under the accredited assessment process.

Understanding our impacts

As a part of the accredited assessment process, we are preparing an Environmental Review Document (ERD) to submit to the regulators.

The ERD describes the proposed future activities, potential impacts on the environment and the measures which will be used to mitigate those impacts. This is informed by extensive studies, which include:

Surveys to identify and record data on the location, diversity and health of species. This includes conservation significant flora and threatened species such as black cockatoos and chuditch.

Surveys to identify areas of spiritual, historical, scientific, aesthetic and social values – including recreation areas, tracks and trails.

Baseline monitoring and studies to assess and understand water quality, quantity and movements of both surface and groundwater.

Assessment of potential emissions from mining and refining operations.

Accredited assessment process and timeline

Below is the process the EPA follows in determining the outcome of an environmental assessment and an indicative timeline for assessment of Alcoa’s proposal.

Ministerial decisions Appeals process Alcoa prepares responsesto submissions EPA's assessmentand recommendationspublished Public comment on theEnvironmental ReviewDocument Level of assessment isset by regulators Alcoa undertakes studies andprepares the EnvironmentalReview Document COMPLETE Alcoa refers Proposalto regulators COMPLETE 2024 Q1 2026 2025 Updated August 2024Subject to change