Standards of performance for new sources.

  1. Law
  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Effluent Guidelines and Standards
  6. Nonferrous Metals Manufacturing Point Source Category
  7. Secondary Indium Subcategory
  8. Standards of performance for new sources.

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§ 421.194 Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Displacement Supernatant.

NSPS for the Secondary Indium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of indium metal produced
Cadmium 2.105 0.929
Lead 2.600 1.238
Zinc 9.037 3.776
Indium 2.724 1.114
Total suspended solids 253.800 120.700
pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Spent Electrolyte.

NSPS for the Secondary Indium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cathode indium produced
Cadmium 12.170 5.370
Lead 15.040 7.160
Zinc 52.270 21.840
Indium 15.750 6.444
Total suspended solids 1,468.000 698.100
pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.


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