GroundRules
40 CFR 420.74: 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 G—Hot Forming Subcategory
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
(a) Primary mills, carbon and specialty—(1) Without scarfing.
Subpart G
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 0.0150 0.00563
O&G 0.00373
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(2) With scarfing.
Subpart G
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 0.0234 0.00876
O&G 0.00584
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(b) Section mills—(1) Carbon.
Subpart G
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 0.0334 0.0125
O&G 0.00834
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(2) Specialty.
Subpart G
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 0.0217 0.00813
O&G 0.00542
pH (1) (1)
1 Within the range of 6.0 to 9.0.
(c) Flat mills—(1) Hot strip and sheet mills, carbon and specialty.
Subpart G
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 products
TSS 0.0435 0.0163
O&G 0.0109
pH (1) (1)
1 Within the range of 6.0 to 9.0
(2) Carbon plate mills.
Subpart G
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 products
TSS 0.0234 0.00876
O&G 0.00584
pH (1) (1)
1 Within the range of 6.0 to 9.0
(3) Specialty plate mills.
Subpart G
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 products
TSS 0.0100 0.00375
O&G 0.00250
pH (1) (1)
1 Within the range of 6.0 to 9.0
(d) Pipe and tube mills, carbon and specialty.
Subpart G
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 products
TSS 0.0369 0.0138
O&G 0.00917
pH (1) (1)
1 Within the range of 6.0 to 9.0
Collected 2026-08-27T02:26:04Z. Source file · JSON