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40 C.F.R. § 420.104

New source performance standards (NSPS).

§ 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
TSS0.001250.000626
O&G0.0005220.000209
Chromium 10.00002090.0000084
Lead0.00000940.0000031
Nickel 10.00001880.0000063
Zinc0.00000630.0000021
Naphthalene0.0000021
Tetrachloroethylene0.0000031
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
TSS0.002500.00125
O&G0.001040.000417
Chromium 10.00004180.0000167
Lead0.00001880.0000063
Nickel 10.00003760.0000125
Zinc0.00001250.0000042
Naphthalene0.0000042
Tetrachloroethylene0.0000063
pH( 2)( 2)
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