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

  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. Primary Nickel and Cobalt Subcategory
  8. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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§ 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.

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BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
Copper 0.146 0.077
Nickel 0.148 0.098
Ammonia (as N) 10.260 4.512
Cobalt 0.016 0.007
Total suspended solids 3.157 1.502
pH (1) (1)

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

(b) Nickel wash water.

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BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of nickel powder washed
Copper 0.064 0.034
Nickel 0.065 0.043
Ammonia (as N) 4.515 1.985
Cobalt 0.007 0.003
Total suspended solids 1.389 0.660
pH (1) (1)

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

(c) Nickel reduction decant.

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BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of nickel produced
Copper 24.120 12.700
Nickel 24.370 16.120
Ammonia (as N) 1,692.000 743.900
Cobalt 2.666 1.143
Total suspended solids 520.500 247.600
pH (1) (1)

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

(d) Cobalt reduction decant.

Expand Table

BPT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of cobalt produced
Copper 40.660 21.400
Nickel 41.080 27.180
Ammonia (as N) 2,852.000 1,254.000
Cobalt 4.494 1.926
Total suspended solids 877.300 417.300
pH (1) (1)

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


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