GroundRules
40 CFR 420.93: Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 420—IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY
- Subpart I—Acid Pickling Subcategory
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.
Collected 2026-08-27T02:26:04Z. Source file · JSON