Regulations last checked for updates: Feb 13, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
All TitlesTitle 40Chapter IPart 420Subpart J - Subpart J—Cold Forming Subcategory
View all text of Subpart J [§ 420.100 - § 420.107]
§ 420.106 - Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources.

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

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium 10.00002090.0000084
Lead0.00000940.0000031
Nickel 10.00001880.0000063
Zinc0.00000630.0000021
Naphthalene0.0000021
Tetrachloroethylene0.0000031

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) Recirculation—multiple stands.

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium 10.00004180.0000167
Lead0.00001880.0000063
Nickel 10.00003760.0000125
Zinc0.00001250.0000042
Naphthalene0.0000042
Tetrachloroethylene0.0000063

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.

(3) Combination.

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium 10.0005430.000217
Lead0.0002440.0000814
Nickel 10.0004880.000163
Zinc0.0001630.0000542
Naphthalene0.0000542
Tetrachloroethylene0.0000813

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.

(4) Direct application—single stand.

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg pounds per 1,000 lb) of product
Chromium 1 0.0001040.0000418
Lead0.00004690.0000156
Nickel 1 0.00009390.0000313
Zinc0.00003130.0000104
Naphthalene0.0000104
Tetrachloroethylene0.0000156

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.

(5) Direct application—multiple stands.

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg pounds per 1,000 lb) of product
Chromium 1 0.001210.000484
Lead0.0005450.000182
Nickel 1 0.001090.000363
Zinc0.0003630.000121
Naphthalene0.000121
Tetrachloroethylene0.000182

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.

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

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any one day Average of daily values for 30 consecutive days
kg/kkg (pounds per 1,000 lb) of product
Chromium 10.00002090.0000084
Lead0.00000940.0000031
Nickel 10.00001880.0000063
Zinc0.00000630.0000021

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

(2) Using oil solutions.

Subpart J

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any one day Average of daily values for 30 consecutive days
kg/kkg (pound per 1,000 lb) of product
Chromium 10.00002090.0000084
Lead0.00000940.0000031
Nickel 10.00001880.0000063
Zinc0.00000630.0000021
Naphthalene0.0000021
Tetrachloroethylene0.0000031

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

[47 FR 23284, May 27, 1982, as amended at 49 FR 21035, May 17, 1984]
authority: 33 U.S.C. 1311,1314,1316,1317,1318,1342,and
source: 47 FR 23284, May 27, 1982, unless otherwise noted.
cite as: 40 CFR 420.106
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