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		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.