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40 C.F.R. § 420.97

Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

§ 420.97 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology.

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

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.08190.0350
O&G 10.03500.0117
pH( 2)( 2)

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

2 Within the range of 6.0 to 9.0.

(2) Bar, billet and bloom.

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.02630.0113
O&G 10.01130.00376
pH( 2)( 2)

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

2 Within the range of 6.0 to 9.0.

(3) Strip, sheet and plate.

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.05260.0225
O&G 10.02250.00751
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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