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

View all text of Subpart I [§ 420.90 - § 420.97]

§ 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.

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]