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

§ 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
TSS	0.0818	0.0350
O&G1	0.0350	0.0117
Lead	0.000526	0.000175
Zinc	0.000701	0.000234
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
TSS	0.0263	0.0113
O&G1	0.0113	0.00375
Lead	0.000169	0.0000563
Zinc	0.000225	0.0000751
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
TSS	0.0526	0.0225
O&G1	0.0225	0.00751
Lead	0.000338	0.000113
Zinc	0.000451	0.000150
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
TSS	0.146	0.0626
O&G1	0.0626	0.0209
Lead	0.000939	0.000313
Zinc	0.00125	0.000417
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
TSS	5.72	2.45
O&G1	2.45	0.819
Lead	0.0368	0.0123
Zinc	0.0491	0.0164
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
TSS	0.143	0.0613
O&G1	0.0613	0.0204
Lead	0.000920	0.000307
Zinc	0.00123	0.000409
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
TSS	0.0818	0.0350
O&G1	0.0350	0.0117
Lead	0.000526	0.000175
Zinc	0.000701	0.000234
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
TSS	0.298	0.128
O&G1	0.128	0.0426
Lead	0.00192	0.000638
Zinc	0.00255	0.000851
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
TSS	5.72	2.45
O&G1	2.45	0.819
Lead	0.0368	0.0123
Zinc	0.0491	0.0164
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
TSS	38.2	16.3
O&G1	16.3	5.45
Lead	0.245	0.0819
Zinc	0.327	0.109
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
TSS	0.149	0.0638
O&G1	0.0638	0.0213
Chromium	0.00213	0.000852
Nickel	0.00192	0.000638
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
TSS	0.0672	0.0288
O&G1	0.0288	0.00960
Chromium	0.000960	0.000384
Nickel	0.000864	0.000288
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
TSS	0.438	0.188
O&G1	0.188	0.0626
Chromium	0.00626	0.00250
Nickel	0.00563	0.00188
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
TSS	0.134	0.0576
O&G1	0.0576	0.0192
Chromium	0.00192	0.000768
Nickel	0.00173	0.000576
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
TSS	0.225	0.0964
O&G1	0.0964	0.0322
Chromium	0.00322	0.00129
Nickel	0.00289	0.000964
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
TSS	5.72	2.45
O&G1	2.45	0.819
Chromium	0.0819	0.0327
Nickel	0.0735	0.0245
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]