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) > 421.185—Pretreatment standards for existing sources.

421.185—Pretreatment standards for existing sources.

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. The mass of wastewater pollutants in primary and secondary germanium and gallium process wastewater introduced into a POTW must not exceed the following values:
(a) Still liquor.
PSES 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 131.70 58.59
Lead 26.46 12.60
Zinc 91.98 38.43
Fluoride 2,205.00 1,254.00
(b) Chlorinator wet air pollution control.
PSES 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.
PSES 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.
PSES 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.
PSES 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 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.
PSES 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