CFR › Title 40 › Part 421 › §421.5440 CFR §421.54Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkAny new source subject to this subpart shall achieve the following new source performance standards:(a)Subpart E—Casting Contact Cooling.(b)Subpart E—Anode and Cathode Rinse.(c)Subpart E—Spent Electrolyte.(d)Subpart E—Casting Wet Air Pollution Control.(e)Subpart E—By-Product Recovery.