StacksVerified U.S. regulatory reference

40 CFR Part 63, Table 2

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov

As required in § 63.1444(o), you must meet each emission limit in the following table that applies to you.

For. . .You must meet the following emission limit
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsBenzene emissions must not exceed 1.7E-03 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsToluene emissions must not exceed 8.4E-04 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsChlorine emissions must not exceed 5.4E-03 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsHydrogen chloride emissions must not exceed 1.5E-03 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsPolycyclic aromatic hydrocarbons (excluding naphthalene) emissions must not exceed 1.0E-04 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsNaphthalene emissions must not exceed 2.8E-04 lb/ton copper concentrate feed charged to the smelting vessel.
Each new and existing combination of stacks or other vents from the copper concentrate dryers, converting department, the anode refining department, and the smelting vesselsDioxins/Furans emissions 1 must not exceed 6.0E+01 ng TEQ/Mg copper concentrate feed charged to the smelting vessel.

1 Determined using the toxic equivalency factors listed in Table 2 of Recommended Toxicity Equivalence Factors (TEFs) for Human Health Risk Assessments of 2, 3, 7, 8- Tetrachlorodibenzo-p-dioxin and Dioxin-Like Compounds (incorporated by reference, see § 63.14).