GroundRules
40 CFR 421.244: 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 V—Secondary Nickel Subcategory
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Slag reclaim tailings.
NSPS for the Secondary Nickel Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of slag input to reclaim process
Chromium (total) 5.653 2.313
Copper 24.410 12.850
Nickel 24.670 16.320
Total suspended solids 526.800 250.500
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(b) Acid reclaim leaching filtrate.
NSPS for the Secondary Nickel Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of acid reclaim nickel produced
Chromium (total) 2.198 0.899
Copper 9.491 4.995
Nickel 9.590 6.344
Total suspended solids 204.800 97.400
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
(c) Acid reclaim leaching belt filter backwash.
NSPS for the Secondary Nickel Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of acid reclaim nickel produced
Chromium (total) 0.528 0.216
Copper 2.278 1.199
Nickel 2.302 1.523
Total suspended solids 49.160 23.380
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