Product Constituent

ID Concentration Min Percent Concentration Max Percent Notes Material Product Substance
1 8.0 14.0 Quartz content by XRD across the FY2025 ore body c... Banded iron formation ore feed Respirable crystalline silica
2 90.0 100.0 Bulk material; inhalable fraction dominates at the... Banded iron formation ore feed Inhalable dust
3 3.0 7.0 Respirable fraction estimated from bulk drop-test ... Banded iron formation ore feed Respirable dust
4 92.0 98.0 High-purity quartz. Substitution assessment open —... Silica sand (filter and blast media) Respirable crystalline silica
5 95.0 100.0 Fume generation rate 0.6 g/min at 130 A per manufa... Welding consumable E7018 low-hydrogen electrode Welding fume
6 95.0 100.0 Alkaline dust — irritation rather than fibrogenic ... Hydrated lime Inhalable dust
7 0.1 0.6 Post-detonation fume composition, oxygen-balance d... Bulk ANFO explosive Carbon monoxide
8 0.05 0.4 Post-detonation fume; elevated under poor confinem... Bulk ANFO explosive Nitrogen dioxide
9 0.0 0.0 DPM is a combustion product, not a constituent — r... Ultra-low sulfur diesel Diesel particulate matter
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