CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY > SUBPART H—Primary Zinc Subcategory (§421.80 to §421.87) > 421.83—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

421.83—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:
(a) Subpart H—Zinc Reduction Furnace Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc reduced
Cadmium .334 .134
Copper 2.135 1.018
Lead .467 .217
Zinc 1.702 .701
(b) Subpart H—Preleach of Zinc Concentrates.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of concentrate leached
Cadmium .180 .072
Copper 1.153 .550
Lead .252 .117
Zinc .919 .378
(c) Subpart H—Leaching Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc processed through leaching
Cadmium .000 .000
Copper .000 .000
Lead .000 .000
Zinc .000 .000
(d) Subpart H—Electrolyte Bleed Wastewater.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode zinc produced
Cadmium .086 .035
Copper .553 .264
Code of Federal Regulations 492
Lead .121 .056
Zinc .441 .182
(e) Subpart H—Cathode and Anode Wash Wastewater.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode zinc produced
Cadmium .150 .060
Copper .961 .458
Lead .210 .098
Zinc .766 .315
(f) Subpart H—Casting Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc cast
Cadmium .051 .021
Copper .329 .157
Lead .072 .033
Zinc .262 .108
(g) Subpart H—Casting Contact Cooling.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zinc cast
Cadmium .036 .014
Copper .232 .110
Lead .051 .024
Zinc .185 .076
(h) Subpart H—Cadmium Plant Wastewater.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cadmium produced
Cadmium 1.234 .494
Copper 7.899 3.765
Lead 1.728 .802
Zinc 6.295 2.592