40 C.F.R. § 421.244

Current through September 30, 2024
Section 421.244 - Standards of performance for new sources

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)5.6532.313
Copper24.41012.850
Nickel24.67016.320
Total suspended solids526.800250.500
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)2.1980.899
Copper9.4914.995
Nickel9.5906.344
Total suspended solids204.80097.400
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)0.5280.216
Copper2.2781.199
Nickel2.3021.523
Total suspended solids49.16023.380
pH(1)(1)

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

40 C.F.R. §421.244