Regulations last checked for updates: Nov 24, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024
All TitlesTitle 40Chapter IPart 420Subpart I - Subpart I—Acid Pickling Subcategory
View all text of Subpart I [§ 420.90 - § 420.97]
§ 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.

2 Within the range of 6.0 to 9.0.

(4) Pipe, tube and other products.

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
TSS0.1460.0626
O&G 10.06260.0209
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.

(5) Fume scrubbers.

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
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.

The above limitations shall be applicable to each fume scrubber associated with a sulfuric acid pickling operation.

(b) Hydrochloric 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
TSS0.1430.0613
O&G 10.06130.0204
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) 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
TSS0.08190.0350
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.

(3) Pipe, tube and other products.

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
TSS0.2980.128
O&G 10.1280.0426
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

(4) Fume scrubbers.

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
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.

The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation.

(5) Acid regeneration (absorber vent scrubber).

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS38.216.3
O&G 116.35.45
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.

The above limitations shall be applicable to the absorber vent scrubber wastewater associated with hydrochloric acid regeneration plants.

(c) Combination acid pickling (spent acid solution 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
TSS0.1490.0638
O&G 10.06380.0213
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
TSS0.06720.0288
O&G 10.02880.00960
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—continuous.

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
TSS0.4380.188
O&G 10.1880.0626
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.

(4) Strip, sheet and plate—batch.

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
TSS0.1340.0576
O&G 10.05760.0192
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.

(5) Pipe, tube, and other products.

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
TSS0.2250.0964
O&G 10.09640.0321
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.

(6) Fume scrubbers.

Subpart I

Pollutant or pollutant property BCT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
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.

The above limitations shall be applicable to each fume scrubber associated with a combination acid pickling operation. [47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]
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 420.97
© 2014 CustomsMobile | Disclaimer | Privacy | About