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 P—Primary and Secondary Germanium and Gallium Subcategory (§421.180 to §421.187) > 421.183—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

421.183—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) Still liquor.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of germanium chlorinated
Arsenic 131.700 58.590
Lead 26.460 12.600
Zinc 91.980 38.430
Fluoride 2,205.000 1,254.000
(b) Chlorinator wet air pollution control.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of germanium chlorinated
Arsenic 27.530 12.250
Lead 5.531 2.634
Zinc 19.230 8.034
Fluoride 461.000 262.100
(c) Germanium hydrolysis filtrate.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of germanium hydrolyzed
Arsenic 39.440 17.550
Lead 7.925 3.774
Zinc 27.550 11.510
Fluoride 660.500 375.500
(d) Acid wash and rinse water.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of germanium washed
Arsenic 325.50 144.80
Lead 65.40 31.14
Zinc 227.40 94.99
Fluoride 5,450.00 3,099.00
(e) Gallium hydrolysis filtrate.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of germanium hydrolyzed
Arsenic 70.450 31.350
Lead 14.160 6.742
Zinc 49.220 20.560
Fluoride 1,180.000 670.800
(f) Solvent extraction raffinate.
BAT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of gallium produced by solvent extraction
Arsenic 39.330 17.500
Lead 7.904 3.764
Zinc 27.480 11.480
Fluoride 658.700 374.500