GHD | SGS | Chrysos PhotonAssay™ – Emissions, Energy and Waste Assessment for Assay Technology
Zero hazardous waste. 90% less energy used. Zero Scope 1 emissions. See the difference for yourself.
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What this note covers
Independent comparison of PhotonAssay™ and fire assay across energy consumption, greenhouse gas emissions and hazardous lead waste
Based on ten months of operational data from the SGS Kalgoorlie facility
PhotonAssay™ consumes approximately 5x less energy per sample and produces approximately 4x fewer CO₂-equivalent emissions during analysis
Fire assay generates approximately 9 tonnes of hazardous lead waste per month; PhotonAssay™ generates none
Implications for mining operations reducing their ESG footprint and eliminating lead waste handling
Disclaimer
The 12649535_REP-5_Emissions, energy and waste assessment for assay technology dated 14 October 2026 (Report) has been prepared by GHD Pty Ltd for Chrysos Corporation Limited (Chrysos) specifically for the purpose agreed between GHD and Chrysos as set out in the Report, and is not intended for use for any other purpose. GHD disclaims responsibility to any person other than Chrysos arising in connection with this Report. This Report must not, without the prior written consent of GHD, be used or relied on by any other entity or person other than Chrysos. Any use of, or reliance on, the Report by any third party is at the risk of that party. GHD also excludes implied warranties and conditions, to the extent legally permissible. The services undertaken by GHD in connection with preparing the Report were limited to those specifically detailed in the Report and are subject to the scope limitations set out in the Report.
