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 Zirconium and Hafnium 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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§ 421.332 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) Sand drying wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 0.250 0.102
Cyanide (total) 0.165 0.068
Lead 0.239 0.114
Nickel 1.091 0.721
Ammonia (as N) 75.710 33.280
Total suspended solids 23.290 11.080
pH (1) (1)

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

(b) Sand chlorination off-gas wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zironium dioxide and hafnium dioxide produced
Chromium (total) 19.130 7.825
Cyanide (total) 12.610 5.216
Lead 18.260 8.694
Nickel 83.460 55.210
Ammonia (as N) 5,795.000 2,547.000
Total suspended solids 1,782.000 847.700
pH (1) (1)

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

(c) Sand chlorination area-vent wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 3.751 1.534
Cyanide (total) 2.472 1.023
Lead 3.580 1.705
Nickel 16.370 10.830
Ammonia (as N) 1,136.000 449.500
Total suspended solids 349.500 166.200
pH (1) (1)

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

(d) SiCl4 purification wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 3.299 1.350
Cyanide (total) 2.174 0.900
Lead 3.149 1.500
Nickel 14.400 9.522
Ammonia (as N) 999.500 439.400
Total suspended solids 307.400 146.200
pH (1) (1)

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

(e) Feed makeup wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 2.501 1.023
Cyanide (total) 1.648 0.682
Lead 2.387 1.137
Nickel 10.910 7.217
Ammonia (as N) 757.500 333.000
Total suspended solids 233.000 110.800
pH (1) (1)

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

(f) Iron extraction (MIBK) steam stripper bottoms.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 0.987 0.404
Cyanide (total) 0.651 0.269
Lead 0.942 0.449
Nickel 4.308 2.850
Ammonia (as N) 299.100 131.500
Total suspended solids 92.000 43.760
pH (1) (1)

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

(g) Zirconium filtrate.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 17.070 6.982
Cyanide (total) 11.250 4.655
Lead 16.290 7.758
Nickel 74.480 49.260
Ammonia (as N) 5,171.000 2,273.000
Total suspended solids 1,590.000 756.400
pH (1) (1)

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

(h) Hafnium filtrate.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 0.000 0.000
Cyanide (total) 0.000 0.000
Lead 0.000 0.000
Nickel 0.000 0.000
Ammonia (as N) 0.000 0.000
Total suspended solids 0.000 0.000
pH (1) (1)

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

(i) Calcining caustic wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total) 3.959 1.619
Cyanide (total) 2.609 1.080
Lead 3.779 1.799
Nickel 17.270 11.430
Ammonia (as N) 1,199.000 527.200
Total suspended solids 368.900 175.400
pH (1) (1)

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

(j) Pure chlorination wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium and hafnium produced
Chromium (total) 16.860 6.897
Cyanide (total) 11.110 4.598
Lead 16.090 7.663
Nickel 73.570 48.660
Ammonia (as N) 5,108.000 2,245.000
Total suspended solids 1,571.000 747.200
pH (1) (1)

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

(k) Reduction area-vent wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium and hafnium produced
Chromium (total) 1.622 0.663
Cyanide (total) 1.069 0.442
Lead 1.548 0.737
Nickel 7.077 4.681
Ammonia (as N) 491.300 216.000
Total suspended solids 151.100 71.880
pH (1) (1)

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

(l) Magnesium recovery off-gas wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium and hafnium produced
Chromium (total) 9.123 3.732
Cyanide (total) 6.013 2.488
Lead 8.708 4.147
Nickel 39.810 26.330
Ammonia (as N) 2,764.000 1,215.000
Total suspended solids 850.100 404.300
pH (1) (1)

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

(m) Magnesium recovery area-vent wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium and hafnium produced
Chromium (total) 5.068 2.073
Cyanide (total) 3.340 1.382
Lead 4.838 2.304
Nickel 22.110 14.630
Ammonia (as N) 1,535.000 675.000
Total suspended solids 472.200 224.600
pH (1) (1)

1 Within the range of 7.5 to 10.0. .

(n) Zirconium chip crushing wet air pollution control.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium and hafnium produced
Chromium (total) 0.000 0.000
Cyanide (total) 0.000 0.000
Lead 0.000 0.000
Nickel 0.000 0.000
Ammonia (as N) 0.000 0.000
Total suspended solids 0.000 0.000
pH (1) (1)

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

(o) Acid leachate from zirconium metal production.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of pure zirconium produced
Chromium (total) 12.970 5.304
Cyanide (total- 8.545 3.536
Lead 12.380 5.893
Nickel 56.570 37.420
Ammonia (as N) 3,928.000 1,727.000
Total suspended solids 1,208.000 574.600
pH (1) (1)

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

(p) Acid leachate from zirconium alloy production.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium contained in alloys produced
Chromium (total) 6.939 2.839
Cyanide (total) 4.574 1.893
Lead 6.624 3.154
Nickel 30.280 20.030
Ammonia (as N) 2,102.000 924.200
Total suspended solids 646.600 307.600
pH (1) (1)

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

(q) Leaching rinse water from zirconium metal production.

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BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium produced
Chromium (total) 25.930 10.610
Cyanide (total) 17.090 7.072
Lead 24.750 11.790
Nickel 113.200 74.840
Ammonia (as N) 7,856.000 3,453.000
Total suspended solids 2,416.000 1,149.000
pH (1) (1)

1 Within the range of 7.5 to 10.0.

(r) Leaching rinse water from zirconium alloy production.

Expand Table

BPT Limitations for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium in alloys produced
Chromium (total) 0.347 0.142
Cyanide (total) 0.229 0.095
Lead 0.331 0.158
Nickel 1.515 1.002
Ammonia (as N) 105.200 46.240
Total suspended solids 32.350 15.390
pH (1) (1)

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


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