CFR › Title 40 › Part 420 › §420.8440 CFR §420.84Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.(a)Salt bath descaling, oxidizing—(1) Batch, sheet and plate.(2)Batch, rod and wire.(3)Batch, pipe and tube.(4)Continuous.(b)Salt bath descaling, reducing—(1) Batch.(2)Continuous.