Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 420.104: New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
(a) Cold rolling mills—(1) Recirculation—single stand.
Subpart J
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 0.00125 0.000626
O&G 0.000522 0.000209
Chromium 1 0.0000209 0.0000084
Lead 0.0000094 0.0000031
Nickel 1 0.0000188 0.0000063
Zinc 0.0000063 0.0000021
Naphthalene 0.0000021
Tetrachloroethylene 0.0000031
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.
(2) Recirculation—multiple stands.
Subpart J
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 0.00250 0.00125
O&G 0.00104 0.000417
Chromium 1 0.0000418 0.0000167
Lead 0.0000188 0.0000063
Nickel 1 0.0000376 0.0000125
Zinc 0.0000125 0.0000042
Naphthalene 0.0000042
Tetrachloroethylene 0.0000063
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.
(3) Combination.
Subpart J
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 0.0326 0.0163
O&G 0.0136 0.00543
Chromium 1 0.000543 0.000217
Lead 0.000244 0.0000814
Nickel 1 0.000488 0.000163
Zinc 0.000163 0.0000542
Naphthalene 0.0000542
Tetrachloroethylene 0.0000813
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastwaters are treated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.
(4) Direct application—single stand.
Subpart J
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 0.00626 0.00313
O&G 0.00261 0.00104
Chromium 1 0.000104 0.0000418
Lead 0.0000469 0.0000156
Nickel 1 0.0000939 0.0000313
Zinc 0.0000313 0.0000104
Naphthalene 0.0000104
Tetrachloro-ethylene 0.0000156
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling watewaters.
2 Within the range of 6.0 to 9.0.
(5) Direct application—multiple stands.
Subpart J
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 0.0726 0.0363
O&G 0.0302 0.0121
Chromium 1 0.00121 0.000484
Lead 0.000545 0.000182
Nickel 1 0.00109 0.000363
Zinc 0.000363 0.000121
Naphthalene 0.000121
Tetrachloro-ethylene 0.000182
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling watewaters.
2 Within the range of 6.0 to 9.0.
(b) Cold worked pipe and tube mills—(1) Using water.
Subpart J
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 0.00125 0.000626
O&G 0.000522 0.000209
Chromium 1 0.0000209 0.0000084
Lead 0.0000094 0.0000031
Nickel 1 0.0000188 0.0000063
Zinc 0.0000063 0.0000021
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are cotreated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.
(2) Using oil solutions.
Subpart J
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 0.00125 0.000626
O&G 0.000522 0.000209
Chromium 1 0.0000209 0.0000084
Lead 0.0000094 0.0000031
Nickel 1 0.0000188 0.0000063
Zinc 0.0000063 0.0000021
Naphthalene 0.0000021
Tetrachloroethylene 0.0000031
pH (2) (2)
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are cotreated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.

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 J—Cold Forming Subcategory

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Cold rolling mills—(1) Recirculation—single stand.

Subpart J

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 0.00125 0.000626

O&G 0.000522 0.000209

Chromium 1 0.0000209 0.0000084

Lead 0.0000094 0.0000031

Nickel 1 0.0000188 0.0000063

Zinc 0.0000063 0.0000021

Naphthalene 0.0000021

Tetrachloroethylene 0.0000031

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters.

2 Within the range of 6.0 to 9.0.

(2) Recirculation—multiple stands.

Subpart J

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 0.00250 0.00125

O&G 0.00104 0.000417

Chromium 1 0.0000418 0.0000167

Lead 0.0000188 0.0000063

Nickel 1 0.0000376 0.0000125

Zinc 0.0000125 0.0000042

Naphthalene 0.0000042

Tetrachloroethylene 0.0000063

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

2 Within the range of 6.0 to 9.0.

(3) Combination.

Subpart J

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 0.0326 0.0163

O&G 0.0136 0.00543

Chromium 1 0.000543 0.000217

Lead 0.000244 0.0000814

Nickel 1 0.000488 0.000163

Zinc 0.000163 0.0000542

Naphthalene 0.0000542

Tetrachloroethylene 0.0000813

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastwaters are treated with descaling or combination acid pickling wastewaters.

2 Within the range of 6.0 to 9.0.

(4) Direct application—single stand.

Subpart J

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 0.00626 0.00313

O&G 0.00261 0.00104

Chromium 1 0.000104 0.0000418

Lead 0.0000469 0.0000156

Nickel 1 0.0000939 0.0000313

Zinc 0.0000313 0.0000104

Naphthalene 0.0000104

Tetrachloro-ethylene 0.0000156

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling watewaters.

2 Within the range of 6.0 to 9.0.

(5) Direct application—multiple stands.

Subpart J

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 0.0726 0.0363

O&G 0.0302 0.0121

Chromium 1 0.00121 0.000484

Lead 0.000545 0.000182

Nickel 1 0.00109 0.000363

Zinc 0.000363 0.000121

Naphthalene 0.000121

Tetrachloro-ethylene 0.000182

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling watewaters.

2 Within the range of 6.0 to 9.0.

(b) Cold worked pipe and tube mills—(1) Using water.

Subpart J

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 0.00125 0.000626

O&G 0.000522 0.000209

Chromium 1 0.0000209 0.0000084

Lead 0.0000094 0.0000031

Nickel 1 0.0000188 0.0000063

Zinc 0.0000063 0.0000021

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are cotreated with descaling or combination acid pickling wastewaters.

2 Within the range of 6.0 to 9.0.

(2) Using oil solutions.

Subpart J

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 0.00125 0.000626

O&G 0.000522 0.000209

Chromium 1 0.0000209 0.0000084

Lead 0.0000094 0.0000031

Nickel 1 0.0000188 0.0000063

Zinc 0.0000063 0.0000021

Naphthalene 0.0000021

Tetrachloroethylene 0.0000031

pH (2) (2)

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are cotreated with descaling or combination acid pickling wastewaters.

2 Within the range of 6.0 to 9.0.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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