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40 C.F.R. § 420.94

New source performance standards (NSPS).

§ 420.94 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) Sulfuric acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.

Subpart I

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
TSS0.01460.00626
O&G*0.006260.00209
Lead0.00009390.0000313
Zinc0.0001250.0000417
pH( 1)( 1)

*The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters.

1 Within the range of 6.0 to 9.0.

(2) Bar, billet, and bloom.

Subpart I

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
TSS0.008760.00376
O&G*0.003760.00125
Lead0.00005630.0000188
Zinc0.00007510.0000250
pH( 1)( 1)

*The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters.

1 Within the range of 6.0 to 9.0.

(3) Strip, sheet, and plate.

Subpart I

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
TSS0.01170.00501
O&G 10.005010.00167
Lead0.00007510.0000250
Zinc0.0001000.0000334
pH( 2)( 2)

1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters.

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