40 C.F.R. § 420.97

Current through October 31, 2024

Section 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
TSS	0.0819	0.0350
O&G1	0.0350	0.0117
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
TSS	0.0263	0.0113
O&G1	0.0113	0.00376
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
TSS	0.0526	0.0225
O&G1	0.0225	0.00751
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
TSS	0.146	0.0626
O&G1	0.0626	0.0209
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
TSS	5.72	2.45
O&G1	2.45	0.819
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
TSS	0.143	0.0613
O&G1	0.0613	0.0204
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
TSS	0.0819	0.0350
O&G1	0.0350	0.0117
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
TSS	0.298	0.128
O&G1	0.128	0.0426
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
TSS	5.72	2.45
O&G1	2.45	0.819
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
TSS	38.2	16.3
O&G1	16.3	5.45
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
TSS	0.149	0.0638
O&G1	0.0638	0.0213
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
TSS	0.0672	0.0288
O&G1	0.0288	0.00960
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
TSS	0.438	0.188
O&G1	0.188	0.0626
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
TSS	0.134	0.0576
O&G1	0.0576	0.0192
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
TSS	0.225	0.0964
O&G1	0.0964	0.0321
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
TSS	5.72	2.45
O&G1	2.45	0.819
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.

40 C.F.R. §420.97

47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982