40 C.F.R. § 421.74
Standards of performance for new sources.
Cite as 40 C.F.R. § 421.74 (2026)
Any new source subject to this subpart must achieve the following performance standards: (a) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of sinter production Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Subpart G—Blast Furnace Wet Air Pollution Control. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of blast furnace lead bullion produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Subpart G—Blast Furnace Slag Granulation. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of blast furnance lead bullion produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) Subpart G—Dross Reverberatory Slag Granulation. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of slag, speiss, or matte granulated Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Subpart G—Dross Reverberatory Furnace Wet Air Pollution Control. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of dross reverberatory furnace production Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Subpart G—Zinc Fuming Wet Air Pollution Control. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of blast furnace lead bullion produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (g) Subpart G—Hard Lead Refining Slag Granulation. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of hard lead produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Subpart G—Hard Lead Refining Wet Air Pollution Control. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of hard lead produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Subpart G—Facility Washdown. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of lead bullion produced Lead .000 .000 Zinc .000 .000 Total suspended solids .000 .000 pH ( 1 ) ( 1 ) Within the range of 7.5 to 10.0 at all times. (j) Subpart G—Employee Handwash. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of lead bullion produced Lead .924 .429 Zinc 3.366 1.386 Total suspended solids 49.500 39.600 pH ( 1 ) ( 1 ) Within the range of 7.5 to 10.0 at all times. (k) Subpart G—Respirator Wash. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of lead bullion produced Lead 1.484 .689 Zinc 5.406 2.226 Total suspended solids 79.500 63.600 pH ( 1 ) ( 1 ) Within the range of 7.5 to 10.0 at all times. (l) Subpart G—Laundering of Uniforms. NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kkg (pounds per billion pounds) of lead bullion produced Lead 4.340 2.015 Zinc 15.810 6.510 Total suspended solids 232.500 186.000 pH ( 1 ) ( 1 ) Within the range of 7.5 to 10.0 at all times. [49 FR 8803, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]