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
Collapse to view only § 420.90 - Applicability; description of the acid pickling subcategory.
Table of Contents

§ 420.90 - Applicability; description of the acid pickling subcategory.

§ 420.91 - Specialized definitions.

§ 420.92 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 420.93 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

§ 420.94 - New source performance standards (NSPS).

§ 420.95 - Pretreatment standards for existing sources (PSES).

§ 420.96 - Pretreatment standards for new sources (PSNS).

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

§ 420.90 - Applicability; description of the acid pickling subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from sulfuric acid, hydrochloric acid, or combination acid pickling operations.

§ 420.91 - Specialized definitions.

(a) The term sulfuric acid pickling means those operations in which steel products are immersed in sulfuric acid solutions to chemically remove oxides and scale, and those rinsing operations associated with such immersions.

(b) The term hydrochloric acid pickling means those operations in which steel products are immersed in hydrochloric acid solutions to chemically remove oxides and scale, and those rinsing operations associated with such immersions.

(c) The term combination acid pickling means those operations in which steel products are immersed in solutions of more than one acid to chemically remove scale and oxides, and those rinsing steps associated with such immersions.

(d) The term fume scrubber means those pollution control devices used to remove and clean fumes originating in pickling operations.

(e) The term batch means those pickling operations which process steel products such as coiled wire, rods, and tubes in discrete batches or bundles.

(f) The term continuous means those pickling operations which process steel products other than in discrete batches or bundles.

(g) The term acid recovery means those sulfuric acid pickling operations that include processes for recovering the unreacted acid from spent pickling acid solutions.

(h) The term acid regeneration means those hydrochloric acid pickling operations that include processes for regenerating acid from spent pickling acid solutions.

(i) The term neutralization means those acid pickling operations that do not include acid recovery or acid regeneration processes.

(j) The term spent acid solution (or spent pickle liquor) means those solutions of steel pickling acids which have been used in the pickling process and are discharged or removed therefrom.

(k) The term rod, wire and coil means those acid pickling operations that pickle rod, wire or coiled rod and wire products.

(l) The term bar, billet and bloom means those acid pickling operations that pickle bar, billet or bloom products.

(m) The term strip, sheet and plate means those acid pickling operations that pickle strip, sheet or plate products.

(n) The term pipe, tube and other means those acid pickling operations that pickle pipes, tubes or any steel product other than those included in paragraphs (k), (l) and (m) of this section.

§ 420.92 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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 practicable control technology currently available.

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

Subpart I

Pollutant or pollutant property BPT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.08180.0350
O&G 10.03500.0117
Lead0.0005260.000175
Zinc0.0007010.000234
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 BPT 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 10.01130.00375
Lead0.0001690.0000563
Zinc0.0002250.0000751
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 BPT 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
Lead0.0003380.000113
Zinc0.0004510.000150
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 BPT 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
Lead0.0009390.000313
Zinc0.001250.000417
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 BPT 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
Lead0.03680.0123
Zinc0.04910.0164
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 BPT 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
Lead0.0009200.000307
Zinc0.001230.000409
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 BPT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.08180.0350
O&G 10.03500.0117
Lead0.0005260.000175
Zinc0.0007010.000234
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 BPT 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
Lead0.001920.000638
Zinc0.002550.000851
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 BPT 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
Lead0.03680.0123
Zinc0.04910.0164
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 BPT 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
Lead0.2450.0819
Zinc0.3270.109
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 BPT 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
Chromium0.002130.000852
Nickel0.001920.000638
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 BPT 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
Chromium0.0009600.000384
Nickel0.0008640.000288
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 BPT 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
Chromium0.006260.00250
Nickel0.005630.00188
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 BPT 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
Chromium0.001920.000768
Nickel0.001730.000576
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 BPT 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 10.09640.0322
Chromium0.003220.00129
Nickel0.002890.000964
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 BPT 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
Chromium0.08190.0327
Nickel0.07350.0245
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, as amended at 49 FR 21030, May 17, 1984]
§ 420.93 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

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

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0005260.000175
Zinc0.0007010.000234

(2) Bar, billet and bloom.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0001690.0000563
Zinc0.0002250.0000751

(3) Strip, sheet and plate.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0003380.000113
Zinc0.0004510.000150

(4) Pipe, tube and other products.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0009390.000313
Zinc0.001250.000417

(5) Fume scrubbers.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164
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 BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0009200.000307
Zinc0.001230.000409

(2) Strip, sheet and plate.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0005260.000175
Zinc0.0007010.000234

(3) Pipe, tube and other products.

Subpart I

Pollutant or pollutant property BAT effuent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.001920.000638
Zinc0.002550.000851

(4) Fume scrubbers.

Subpart I

Pollutant or pollutant property BAT effuent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164
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 BAT effuent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.2450.0819
Zinc0.3270.109
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 BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.002130.000852
Nickel0.001920.000638

(2) Bar, billet, and bloom.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.0009600.000384
Nickel0.0008640.000288

(3) Strip, sheet, and plate—continuous.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.006260.00250
Nickel0.005630.00188

(4) Strip, sheet, and plate—batch.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.001920.000768
Nickel0.001730.000576

(5) Pipe, tube, and other products.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.003220.00129
Nickel0.002890.000964

(6) Fume scrubbers.

Subpart I

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Chromium0.08190.0327
Nickel0.07350.0245
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, as amended at 49 FR 21031, May 17, 1984; 49 FR 24726, June 15, 1984]
§ 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.

2 Within the range of 6.0 to 9.0.

(4) Pipe, tube and other products.

Subpart I

Pollutant or pollutant property New source performance standars
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
TSS0.02040.00876
O&G 10.008760.00292
Lead0.0001310.0000438
Zinc0.0001750.0000584
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 New source performance standars
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
Lead0.03680.0123
Zinc0.04910.0164
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 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
TSS0.01750.00751
O&G 10.007510.00250
Lead0.0001130.0000376
Zinc0.0001500.0000501
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 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.

1 Within the range of 6.0 to 9.0.

(3) Pipe, tube, and other products.

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
TSS0.03210.0138
O&G 10.01380.00459
Lead0.0002060.0000688
Zinc0.0002750.0000918
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 New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
Lead0.03680.0123
Zinc0.04910.0164
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.

(c) Combination 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
TSS0.02040.00876
O&G 10.008760.00292
Chromium0.0002920.000117
Nickel0.0002630.0000876
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 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
Chromium0.0001670.0000667
Nickel0.0001500.0000501
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 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
TSS0.04960.0213
O&G 10.02130.00710
Chromium0.0007100.000284
Nickel0.0006380.000213
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 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
TSS0.01750.00751
O&G 10.007510.00250
Chromium0.0002500.000100
Nickel0.0002250.0000751
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 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
TSS0.02920.0125
O&G 10.01250.00418
Chromium0.0004180.000167
Nickel0.0003760.000125
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 New source performance standards
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
TSS5.722.45
O&G 12.450.819
Chromium0.08190.0327
Nickel0.07350.0245
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, as amended at 49 FR 21032, May 17, 1984]
§ 420.95 - Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

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

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0005260.000175
Zinc0.0007010.000234

(2) Bar, billet, and bloom.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0001690.0000563
Zinc0.0002250.0000751

(3) Strip, sheet, and plate.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0003380.000113
Zinc0.0004510.000150

(4) Pipe, tube, and other products.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0009390.000313
Zinc0.001250.000417

(5) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164

Note: The above limitations are applicable to each fume scrubber associated with sulfuric acid pickling operations.

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

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0009200.000307
Zinc0.001230.000409

(2) Strip, sheet, and plate.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.0005260.000175
Zinc0.0007010.000234

(3) Pipe, tube, and other products.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.001920.000638
Zinc0.002550.000851

(4) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164

Note: The above limitations shall be applicable for each fume scrubber associated with hydrochloric acid pickling operations.

(5) Acid regeneration (absorber vent scrubber).

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.2450.0819
Zinc0.3270.109

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

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

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.002130.000852
Nickel0.001920.000638

(2) Bar, billet, and bloom.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.0009600.000384
Nickel0.0008640.000288

(3) Strip, sheet, and plate—continuous.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.006260.00250
Nickel0.005630.00188

(4) Strip, sheet, and plate—batch.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.001920.000768
Nickel0.001730.000576

(5) Pipe, tube, and other products.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Chromium0.003220.00129
Nickel0.002890.000964

(6) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for existing sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Chromium0.08190.0327
Nickel0.07350.0245

Note: 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, as amended at 49 FR 21033, May 17, 1984]
§ 420.96 - 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) Sulfuric acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, coil.

Subpart I

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
Lead0.00009390.0000313
Zinc0.0001250.0000417

(2) Bar, billet, and bloom.

Subpart I

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
Lead0.00005630.0000188
Zinc0.00007510.0000250

(3) Strip, sheet, and plate.

Subpart I

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
Lead0.00007510.0000250
Zinc0.0001000.0000334

(4) Pipe, tube, other products.

Subpart I

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
Lead0.0001310.0000438
Zinc0.0001750.0000584

(5) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164

Note: The above limitations are applicable to each fume scrubber associated with sulfuric acid pickling operations.

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

Subpart I

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
Lead0.0001130.0000376
Zinc0.0001500.0000501

(2) Strip, sheet, and plate.

Subpart I

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
Lead0.00007510.0000250
Zinc0.0001000.0000334

(3) Pipe, tube, and other products.

Subpart I

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
Lead0.0002060.0000688
Zinc0.0002750.0000918

(4) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Lead0.03680.0123
Zinc0.04910.0164

Note: The above limitations shall be applicable for each fume scrubber associated with hydrochloric acid pickling operations.

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

Subpart I

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
Chromium0.0002920.000117
Nickel0.0002630.0000876

(2) Bar, billet, and bloom.

Subpart I

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
Chromium0.0001670.0000667
Nickel0.0001500.0000501

(3) Strip, sheet, and plate—continuous.

Subpart I

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
Chromium0.0007100.000284
Nickel0.0006380.000213

(4) Strip, sheet, and plate—batch.

Subpart I

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
Chromium0.0002500.000100
Nickel0.0002250.0000751

(5) Pipe, tube, and other products.

Subpart I

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
Chromium0.0004180.000167
Nickel0.0003760.000125

(6) Fume scrubber.

Subpart I

Pollutant or pollutant property Pretreatment standards for new sources
Maximum for any 1 day Average of daily values for 30 consecutive days
Kilograms per day
Chromium0.08190.0327
Nickel0.07350.0245

Note: The above limitations shall be applicable for each fume scrubber associated with combination acid pickling operations.

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982; 49 FR 21033, May 17, 1984]
§ 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 420.90
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