GroundRules
40 CFR 420.84: New source performance standards (NSPS).
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 420—IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY
- Subpart H—Salt Bath Descaling Subcategory
The 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.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.204 0.0876
Chromium 0.00292 0.00117
Nickel 0.00263 0.000876
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(2) Batch, rod and wire.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.123 0.0526
Chromium 0.00175 0.000701
Nickel 0.00158 0.000526
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(3) Batch, pipe and tube.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.496 0.213
Chromium 0.00709 0.00284
Nickel 0.00638 0.00213
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(4) Continuous.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.0964 0.0413
Chromium 0.00138 0.000551
Nickel 0.00124 0.000413
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(b) Salt bath descaling, reducing—(1) Batch.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.0949 0.0407
Cyanide 0.00102 0.000339
Chromium 0.00136 0.000542
Nickel 0.00122 0.000407
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(2) Continuous.
Subpart H
Pollutant or pollutant property New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS 0.532 0.228
Cyanide 0.00569 0.00190
Chromium 0.00759 0.00304
Nickel 0.00683 0.00228
pH (1) (1)
1 Within the range of 6.0 to 9.0.
Collected 2026-08-27T02:26:04Z. Source file · JSON