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Electronic Code of Federal Regulations

e-CFR Data is current as of August 21, 2014

Title 40Chapter ISubchapter NPart 421Subpart U → §421.232


Title 40: Protection of Environment
PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
Subpart U—Primary Nickel and Cobalt Subcategory


§421.232   Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:

(a) Raw Material dust control.

BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
Copper0.1460.077
Nickel0.1480.098
Ammonia (as N)10.2604.512
Cobalt0.0160.007
Total suspended solids3.1571.502
pH(1)(1)

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

(b) Nickel wash water.

BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of nickel powder washed
Copper0.0640.034
Nickel0.0650.043
Ammonia (as N)4.5151.985
Cobalt0.0070.003
Total suspended solids1.3890.660
pH(1)(1)

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

(c) Nickel reduction decant.

BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of nickel produced
Copper24.12012.700
Nickel24.37016.120
Ammonia (as N)1,692.000743.900
Cobalt2.6661.143
Total suspended solids520.500247.600
pH(1)(1)

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

(d) Cobalt reduction decant.

BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
mg/kg (pounds per million pounds) of cobalt produced
Copper40.66021.400
Nickel41.08027.180
Ammonia (as N)2,852.0001,254.000
Cobalt4.4941.926
Total suspended solids877.300417.300
pH(1)(1)

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



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