GroundRules
40 CFR 421.194: Standards of performance for new sources.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- Subpart Q—Secondary Indium Subcategory
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.
Collected 2026-08-27T02:26:04Z. Source file · JSON