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

§ 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
Lead	0.000526	0.000175
Zinc	0.000701	0.000234

(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
Lead	0.000169	0.0000563
Zinc	0.000225	0.0000751

(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
Lead	0.000338	0.000113
Zinc	0.000451	0.000150

(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
Lead	0.000939	0.000313
Zinc	0.00125	0.000417

(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
Lead	0.0368	0.0123
Zinc	0.0491	0.0164

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
Lead	0.000920	0.000307
Zinc	0.00123	0.000409

(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
Lead	0.000526	0.000175
Zinc	0.000701	0.000234

(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
Lead	0.00192	0.000638
Zinc	0.00255	0.000851

(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
Lead	0.0368	0.0123
Zinc	0.0491	0.0164

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
Lead	0.245	0.0819
Zinc	0.327	0.109

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
Chromium	0.00213	0.000852
Nickel	0.00192	0.000638

(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
Chromium	0.000960	0.000384
Nickel	0.000864	0.000288

(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
Chromium	0.00626	0.00250
Nickel	0.00563	0.00188

(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
Chromium	0.00192	0.000768
Nickel	0.00173	0.000576

(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
Chromium	0.00322	0.00129
Nickel	0.00289	0.000964

(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
Chromium	0.0819	0.0327
Nickel	0.0735	0.0245

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]