Code of Federal Regulations > Title 40 > Chapter I > Part 63 > Subpart X > Appendix - Table 2 to Subpart X of Part 63—Emissions Limits for Secondary Lead Smelting Furnaces

Regulations last checked for updates: Feb 22, 2025

Title 40 - Protection of Environment last revised: Nov 22, 2025

Appendix - Table 2 to Subpart X of Part 63—Emissions Limits for Secondary Lead Smelting Furnaces

For vents from these processes . . .	You must meet the following emissions limits . . . ^a
For vents from these processes . . .	Total hydrocarbon ppm by volume expressed as propane corrected to 4 percent carbon dioxide	Dioxin and furan (dioxins and furans) nanograms/dscm expressed as TEQ corrected to 7 percent O2
Collocated blast and reverberatory furnaces (new and existing)	20 ppmv	0.50 ng/dscm.
Collocated blast and reverberatory furnaces when the reverberatory furnace is not operating for units that comments construction or reconstruction before June 9, 1994	360 ppmv	170 ng/dscm.
Collocated blast and reverberatory furnaces when the reverberatory furnace is not operating for units that commence construction or reconstruction after June 9, 1994	70 ppmv	170 ng/dscm.
Blast furnaces that commence construction or reconstruction before June 9, 1994	360 ppmv	170 ng/dscm.
Blast furnaces that commence construction or reconstruction after June 9, 1994	70 ppmv	170 ng/dscm.
Blast furnaces that commence construction or reconstruction after May 19, 2011	70 ppmv	10 ng/dscm.
Reverberatory and electric furnaces that commence construction or reconstruction before May 19, 2011	12 ppmv	0.20 ng/dscm.
Reverberatory and electric furnaces that commence construction or reconstruction after May 19, 2011	12 ppmv	0.10 ng/dscm.

^a There are no standards for dioxins and furans during periods of startup and shutdown.

authority: 42 U.S.C. 7401

source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.