Climate Change Data

Environmental Metrics

ESG Focus Areas

• Environmental
• Social
• Governance

Environmental Achievements

• Signed an Administrative Settlement Agreement and Order on Consent with the EPA and U.S. Forest Service to begin early action on legacy mine water contamination; reduced project footprint by 13% from the original 2016 design; 51% of the project footprint is within previously disturbed areas; 15% of Scope 1 emissions were avoided in 2021 through the use of solar panels.
• 5,284 pounds of recyclable waste diverted from landfill since 2014

Social Achievements

• Achieved six years without a Lost Time Incident and almost 10 years without a Reportable Spill; 100% of employees participated in business integrity and compliance related training; 67% of executive management and 41% of the workforce were female; launched an independent citizen’s water monitoring initiative; contributed $9.9M to Idaho spending in 2021; $2.6M total community giving since 2014; 13,000+ volunteer hours since 2015; partnered with Ambri Inc. to supply antimony for clean energy batteries.

Governance Achievements

• Adopted an integrated Environmental, Occupational Health and Safety Management System; 33% of Board members are gender or ethnically diverse; implemented an omnibus ESG Policy; 100% of employees participated in business integrity and compliance related training.

Climate Goals & Targets

Environmental Challenges

• Legacy water contamination at the Stibnite mine site; potential impacts of Project lighting on nearby species and habitats; managing stakeholder concerns regarding environmental, social, and economic impacts of the project.

Mitigation Strategies

• Early action water improvements plan; development of a lighting management plan to minimize light pollution; ongoing engagement with stakeholders through presentations, meetings, and the Stibnite Advisory Council; independent water monitoring program.

Supply Chain Management

Supplier Audits: Not disclosed

Responsible Procurement

• Commitment to hiring, contracting, and purchasing supplies and services locally whenever possible; Supplier Code of Ethics will be required for all suppliers once in operations.

Climate-Related Risks & Opportunities

Physical Risks

• Not disclosed

Transition Risks

• Not disclosed

Opportunities

• Partnership with Ambri Inc. to supply antimony for clean energy batteries

Reporting Standards

Frameworks Used: SASB

Certifications: ISO 14000

Third-party Assurance: Warm Springs Consulting

UN Sustainable Development Goals

• Not disclosed

Not disclosed

Sustainable Products & Innovation

• Not disclosed

Awards & Recognition

• Not disclosed

Environmental Metrics

ESG Focus Areas

• Environmental
• Social
• Governance

Environmental Achievements

• Reduced project footprint by 13% from the original 2016 design; 51% of the on-site project footprint is on previously disturbed areas.
• Entered into an agreement with the EPA to conduct pre-operation cleanup activity to improve water quality.
• Designed the project to protect water quality by eliminating the largest waste rock storage facility and using recycled water for processing (nearly 2/3 of water usage).

Social Achievements

• Created the Stibnite Advisory Council through a 2018 Community Agreement for ongoing communication with local communities.
• Established the Stibnite Foundation to support community projects beyond the mine's lifespan.
• Committed to hiring and training locally, anticipating approximately 500 direct jobs during operations.

Governance Achievements

• Adopted formal ESG policies in 2019, with enhancements in 2021.
• Aims to align ESG disclosure with the SASB reporting framework starting with the 2021 sustainability report.
• Implemented an Environmental, Occupational Health & Safety Management System to improve safety and training.

Climate Goals & Targets

Environmental Challenges

• Not disclosed

Mitigation Strategies

• Not disclosed

Supply Chain Management

Supplier Audits: Not disclosed

Responsible Procurement

• Supplier Standards adopted in 2021

Climate-Related Risks & Opportunities

Physical Risks

• Not disclosed

Transition Risks

• Not disclosed

Opportunities

• Providing antimony for clean energy storage batteries

Reporting Standards

Frameworks Used: SASB

Certifications: Null

Third-party Assurance: Not disclosed

UN Sustainable Development Goals

• Goal 3
• Goal 4
• Goal 5
• Goal 6
• Goal 7
• Goal 8
• Goal 9
• Goal 10
• Goal 11
• Goal 12
• Goal 13
• Goal 15
• Goal 16
• Goal 17

Appendix A details how Perpetua's initiatives contribute to these goals.

Sustainable Products & Innovation

• Not disclosed

Awards & Recognition

• Not disclosed

Environmental Metrics

ESG Focus Areas

• Environment
• Social
• Governance

Environmental Achievements

• Continued early cleanup work to proactively address legacy water contamination
• 62,170 kWh solar energy produced on site since 2015 | 4,129 kWh solar in 2023
• 5,463 pounds of material recycled since 2014 | 83 in 2023
• 81,113 TREES planted since 2011 | 16,855 in 2023
• Removal and relocation of 325,000 tons of legacy mine waste away from sensitive waterways

Social Achievements

• 97 months with no Lost Time Incidents and 142 months with no reportable spills as of December 2023
• 11,505 team training hours since 2013 | 2,279 Hours in 2023
• 50% FEMALE executive management
• 37% female workforce
• ~$108M total Idaho spending since 2014 | ~$8M in 2023
• $3.2M+ total community contributions since 2014 | $269,000 in 2023
• 1,205 total community presentations since 2015 | 72 in 2023
• 252 site tours since 2014 | 24 in 2023

Governance Achievements

• Released 10th annual sustainability report; aligned with SASB framework
• 33% of Board members are gender or ethnically diverse
• 100% OF EMPLOYEES participated in business integrity and compliance related training
• Earned special designation from OSHA for the Company’s exemplary commitment to health and safety.

Climate Goals & Targets

Environmental Challenges

• Legacy water contamination from previous mining activities
• Dust abatement on site roads

Mitigation Strategies

• Multi-year, multi-million-dollar investment in water quality improvement
• Investment of over $207,000 in dust reduction measures since 2014

Supply Chain Management

Responsible Procurement

• Supplier Code of Ethics (to be implemented once in operations)

Climate-Related Risks & Opportunities

Opportunities

• Development of energy-efficient products
• Supply of antimony for long-duration energy storage batteries

Reporting Standards

Frameworks Used: SASB

Certifications: ISO 14001, ISO 45001

UN Sustainable Development Goals

• Goal 7 (Affordable and Clean Energy)
• Goal 13 (Climate Action)

Initiatives such as solar energy production, GHG emission reduction efforts, and responsible resource management contribute to these goals.

Awards & Recognition

• OSHA's Safety & Health Achievement Recognition Program (SHARP)