GroundRules
40 CFR 420.95: Pretreatment standards for existing sources (PSES).
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 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
(a) Sulfuric acid (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 scrubber.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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
Note: The above limitations are applicable to each fume scrubber associated with sulfuric acid pickling operations.
(b) Hydrochloric acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 scrubber.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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
Note: The above limitations shall be applicable for each fume scrubber associated with hydrochloric acid pickling operations.
(5) Acid regeneration (absorber vent scrubber).
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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
Note: The above limitations shall be applicable to the absorber vent scrubber wastewater associated with hydrochloric acid regeneration plants.
(c) Combination acid pickling (spent acid solutions and rinse waters)—(1) Rod, wire, and coil.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 Pretreatment standards for existing sources
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 scrubber.
Subpart I
Pollutant or pollutant property Pretreatment standards for existing sources
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
Note: 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