Metals Exposure type RfC (mg/m3) RfD (mg/kg/day) References Aluminum Acute and subacute 6.1E-04 1.1E-04 [3] Aluminum Chronic 6.5E-05 1.2E-05 [4] Manganese Acute and subacute 9.0E-06 2.0E-06 [5] Manganese Chronic 3.2E-04 5.8E-05 [6] Copper Acute and subacute 1.2E-04 2.2E-05 [7] Copper Chronic 6.4E-03 1.15E-03 [8] Zinc Acute and subacute 3.6E-04 6.5E-05 [9] Magnesium Acute and subacute 4.1 7.38E-01 [10] Iron Chronic 45.85 8.25

Table 2: RfC values and Estimated RfD for general populations exposed to metals by inhalation from the aluminum production plant.