- § 421.330 - Applicability: Description of the primary zirconium and hafnium subcategory.
- § 421.331 - Specialized definitions.
- § 421.332 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
- § 421.333 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
- § 421.334 - Standards of performance for new sources.
- § 421.335 - [Reserved]
- § 421.336 - Pretreatment standards for new sources.
- § 421.337 - [Reserved]
§ 421.330 - Applicability: Description of the primary zirconium and hafnium subcategory.
The provisions of this subpart are applicable to discharges resulting from the production of zirconium or hafnium at primary zirconium and hafnium facilities. There are two levels of BPT, BAT, NSPS, PSES and PSNS provisions for this subpart. Facilities which only produce zirconium or zirconium/nickel alloys by magnesium reduction of zirconium dioxide are exempt from regulations. All other facilities are subject to these regulations.
§ 421.331 - Specialized definitions.
For the purpose of this subpart the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.
§ 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.
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.
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.
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) SiCl
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
§ 421.333 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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 available technology economically achievable:
(a) Sand drying wet air pollution control.
BAT 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) | 0.210 | 0.085 | Cyanide (total) | 0.114 | 0.045 | Lead | 0.159 | 0.074 | Nickel | 0.312 | 0.210 | Ammonia (as N) | 75.710 | 33.280 |
|---|
(b) Sand chlorination off-gas wet air pollution control.
BAT 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) | 16.080 | 6.521 | Cyanide (total) | 8.694 | 3.478 | Lead | 12.170 | 5.651 | Nickel | 23.910 | 16.080 | Ammonia (as N) | 5,795.000 | 2,547.000 |
|---|
(c) Sand chlorination area-vent wet air pollution control.
BAT 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) | 3.154 | 1.279 | Cyanide (total) | 1.705 | 0.682 | Lead | 2.387 | 1.108 | Nickel | 4.688 | 3.154 | Ammonia (as N) | 1,136.000 | 499.500 |
|---|
(d) SiCl
BAT 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) | 2.774 | 1.125 | Cyanide (total) | 1.500 | 0.600 | Lead | 2.099 | 0.975 | Nickel | 4.124 | 2.774 | Ammonia (as N) | 999.500 | 439.400 |
|---|
(e) Feed makeup wet air pollution control.
BAT 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) | 2.103 | 0.852 | Cyanide (total) | 1.137 | 0.455 | Lead | 1.591 | 0.739 | Nickel | 3.126 | 2.103 | Ammonia (as N) | 757.500 | 333.000 |
|---|
(f) Iron extraction (MIBK) steam stripper bottoms.
BAT 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) | 0.830 | 0.337 | Cyanide (total) | 0.449 | 0.180 | Lead | 0.628 | 0.292 | Nickel | 1.234 | 0.830 | Ammonia (as N) | 299.100 | 131.500 |
|---|
(g) Zirconium filtrate.
BAT 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) | 14.350 | 5.819 | Cyanide (total) | 7.758 | 3.103 | Lead | 10.860 | 5.043 | Nickel | 21.330 | 14.350 | Ammonia (as N) | 5,171.000 | 2,273.00 |
|---|
(h) Hafnium filtrate.
BAT 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 |
|---|
(i) Calcining caustic wet air pollution control.
BAT 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) | 3.329 | 1.350 | Cyanide (total) | 1.799 | 0.720 | Lead | 2.519 | 1.170 | Nickel | 4.948 | 3.329 | Ammonia (as N) | 1,199.000 | 527.200 |
|---|
(j) Pure chlorination wet air pollution control.
BAT 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) | 14.180 | 5.748 | Cyanide (total) | 7.663 | 3.065 | Lead | 10.730 | 4.981 | Nickel | 21.070 | 14.180 | Ammonia (as N) | 5,108.000 | 2,245.000 |
|---|
(k) Reduction area-vent wet air pollution control.
BAT 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) | 1.364 | 0.553 | Cyanide (total) | 0.737 | 0.295 | Lead | 1.032 | 0.479 | Nickel | 2.027 | 1.364 | Ammonia (as N) | 491.300 | 216.000 |
|---|
(l) Magnesium recovery off-gas wet air pollution control.
BAT 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) | 7.671 | 3.110 | Cyanide (total) | 4.147 | 1.659 | Lead | 5.805 | 2.695 | Nickel | 11.400 | 7.671 | Ammonia (as N) | 2,764.000 | 1,215.000 |
|---|
(m) Magnesium recovery area-vent wet air pollution control.
BAT 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) | 4.262 | 1.728 | Cyanide (total) | 2.304 | 0.921 | Lead | 3.225 | 1.497 | Nickel | 6.335 | 4.262 | Ammonia (as N) | 1,535.000 | 675.000 |
|---|
(n) Zirconium chip crushing wet air pollution control.
BAT 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 |
|---|
(o) Acid leachate from zirconium metal production.
BAT 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) | 10.900 | 4.420 | Cyanide (total) | 5.893 | 2.357 | Lead | 8.250 | 3.831 | Nickel | 16.210 | 10.900 | Ammonia (as N) | 3,928.000 | 1,674.000 |
|---|
(p) Acid leachate from zirconium alloy production.
BAT 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) | 5.835 | 2.366 | Cyanide (total) | 3.154 | 1.262 | Lead | 4.416 | 2.050 | Nickel | 8.674 | 5.835 | Ammonia (as N) | 2,102.000 | 895.000 |
|---|
(q) Leaching rinse water from zirconium metal production.
BAT 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) | 21.810 | 8.840 | Cyanide (total) | 11.790 | 4.715 | Lead | 16.500 | 7.661 | Nickel | 32.410 | 21.810 | Ammonia (as N) | 7,856.000 | 3,453.000 |
|---|
(r) Leaching rinse water from zirconium alloy production.
BAT 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) | 0.292 | 0.118 | Cyanide (total) | 0.158 | 0.063 | Lead | 0.221 | 0.103 | Nickel | 0.434 | 0.292 | Ammonia (as N) | 105.200 | 46.240 |
|---|
§ 421.334 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Sand drying wet air pollution control.
NSPS 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) | 0.210 | 0.085 | Cyanide (total) | 0.114 | 0.045 | Lead | 0.159 | 0.074 | Nickel | 0.312 | 0.210 | Ammonia (as N) | 75.710 | 33.280 | Total suspended solids | 8.520 | 6.816 | 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.
NSPS 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) | 16.080 | 6.521 | Cyanide (total) | 8.694 | 3.478 | Lead | 12.170 | 5.651 | Nickel | 23.910 | 16.080 | Ammonia (as N) | 5,795.000 | 2,547.000 | Total suspended solids | 652.100 | 521.000 | 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.
NSPS 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) | 3.154 | 1.279 | Cyanide (total) | 1.705 | 0.682 | Lead | 2.387 | 1.108 | Nickel | 4.688 | 3.154 | Ammonia (as N) | 1,136.000 | 499.500 | Total suspended solids | 127.900 | 102.300 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(d) SiC
NSPS 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) | 2.774 | 1.125 | Cyanide (total) | 1.500 | 0.600 | Lead | 2.099 | 0.975 | Nickel | 4.124 | 2.774 | Ammonia (as N) | 999.500 | 439.400 | Total suspended solids | 112.500 | 89.980 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(e) Feed makeup wet air pollution control.
NSPS 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) | 2.103 | 0.852 | Cyanide (total) | 1.137 | 0.455 | Lead | 1.591 | 0.739 | Nickel | 3.126 | 2.103 | Ammonia (as N) | 757.500 | 333.000 | Total suspended solids | 85.250 | 68.200 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(f) Iron extraction (MIBK) steam stripper bottoms.
NSPS 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) | 0.830 | 0.337 | Cyanide (total) | 0.449 | 0.180 | Lead | 0.628 | 0.292 | Nickel | 1.234 | 0.830 | Ammonia (as N) | 299.100 | 131.500 | Total suspended solids | 33.660 | 26.930 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(g) Zirconium filtrate.
NSPS 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) | 14.350 | 5.819 | Cyanide (total) | 7.758 | 3.103 | Lead | 10.860 | 5.043 | Nickel | 21.330 | 14.350 | Ammonia (as N) | 5,171.000 | 2,273.000 | Total suspended solids | 581.900 | 465.500 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(h) Hafnium filtrate.
NSPS 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.
NSPS 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) | 3.329 | 1.350 | Cyanide (total) | 1.799 | 0.720 | Lead | 2.519 | 1.170 | Nickel | 4.948 | 3.329 | Ammonia (as N) | 1,199.000 | 527.200 | Total suspended solids | 135.000 | 108.000 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(j) Pure chlorination wet air pollution control.
NSPS 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) | 14.180 | 5.748 | Cyanide (total) | 7.663 | 3.065 | Lead | 10.730 | 4.981 | Nickel | 21.070 | 14.180 | Ammonia (as N) | 5,108.000 | 2,245.000 | Total suspended solids | 574.800 | 459.800 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(k) Reduction area-vent wet air pollution control.
NSPS 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) | 1.364 | 0.553 | Cyanide (total) | 0.737 | 0.295 | Lead | 1.032 | 0.479 | Nickel | 2.027 | 1.364 | Ammonia (as N) | 491.300 | 216.000 | Total suspended solids | 55.290 | 44.230 | 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.
NSPS 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) | 7.671 | 3.110 | Cyanide (total) | 4.147 | 1.659 | Lead | 5.805 | 2.695 | Nickel | 11.400 | 7.671 | Ammonia (as N) | 2,764.000 | 1,215.000 | Total suspended solids | 404.300 | 248.800 | 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.
NSPS 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) | 4.262 | 1.728 | Cyanide (total) | 2.304 | 0.921 | Lead | 3.225 | 1.497 | Nickel | 6.335 | 4.262 | Ammonia (as N) | 1,535.000 | 675.000 | Total suspended solids | 172.800 | 138.200 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(n) Zirconium chip crushing west air pollution control.
NSPS 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.
NSPS 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) | 10.900 | 4.420 | Cyanide (total) | 5.893 | 2.357 | Lead | 8.250 | 3.831 | Nickel | 16.210 | 10.900 | Ammonia (as N) | 3,928.000 | 1,674.000 | Total suspended solids | 442.000 | 353.600 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(p) Acid leachate from zirconium alloy production.
NSPS 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) | 5.835 | 2.366 | Cyanide (total) | 3.154 | 1.262 | Lead | 4.416 | 2.050 | Nickel | 8.674 | 5.835 | Ammonia (as N) | 2,102.000 | 895.800 | Total suspended solids | 236.600 | 189.300 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(q) Leaching rinse water from zirconium metal production.
NSPS 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) | 21.810 | 8.840 | Cyanide (total) | 11.790 | 4.715 | Lead | 16.500 | 7.661 | Nickel | 32.410 | 21.810 | Ammonia (as N) | 7,856.000 | 3,453.000 | Total suspended solids | 884.000 | 707.200 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(r) Leaching rinse water from zirconium alloy production.
NSPS 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) | 0.292 | 0.118 | Cyanide (total) | 0.158 | 0.063 | Lead | 0.221 | 0.103 | Nickel | 0.434 | 0.292 | Ammonia (as N) | 105.200 | 46.240 | Total suspended solids | 11.840 | 9.468 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
§ 421.335 - [Reserved]
§ 421.336 - Pretreatment standards for new sources.
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary zirconium and hafnium process wastewater introduced into a POTW shall not exceed the following values:
(a) Sand drying wet air pollution control.
PSNS 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) | 0.210 | 0.085 | Cyanide (total) | 0.114 | 0.045 | Lead | 0.159 | 0.074 | Nickel | 0.312 | 0.210 | Ammonia (as N) | 75.710 | 33.280 |
|---|
(b) Sand chlorination off-gas wet air pollution control.
PSNS 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) | 16.080 | 6.521 | Cyanide (total) | 8.690 | 3.478 | Lead | 12.170 | 5.651 | Nickel | 23.910 | 16.080 | Ammonia (as N) | 5,795.000 | 2,547.000 |
|---|
(c) Sand chlorination area vent wet air pollution control.
PSNS 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) | 3.154 | 1.279 | Cyanide (total) | 1.705 | 0.682 | Lead | 2.387 | 1.108 | Nickel | 4.688 | 3.154 | Ammonia (as N) | 1,136.000 | 499.500 |
|---|
(d) SiCl
PSNS 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) | 2.774 | 1.125 | Cyanide (total) | 1.500 | 0.600 | Lead | 2.099 | 0.975 | Nickel | 4.124 | 2.774 | Ammonia (as N) | 999.500 | 439.400 |
|---|
(e) Feed makeup wet air pollution control.
PSNS 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) | 2.103 | 0.852 | Cyanide (total) | 1.137 | 0.455 | Lead | 1.591 | 0.739 | Nickel | 3.126 | 2.103 | Ammonia (as N) | 757.500 | 333.000 |
|---|
(f) Iron extraction (MIBK) steam stripper bottoms.
PSNS 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) | 0.830 | 0.337 | Cyanide (total) | 0.449 | 0.180 | Lead | 0.628 | 0.292 | Nickel | 1.234 | 0.830 | Ammonia (as N) | 299.100 | 131.500 |
|---|
(g) Zirconium filtrate.
PSNS 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) | 14.350 | 5.819 | Cyanide (total) | 7.758 | 3.103 | Lead | 10.860 | 5.043 | Nickel | 21.340 | 14.350 | Ammonia (as N) | 5,171.000 | 2,273.000 |
|---|
(h) Hafnium filtrate.
PSNS 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 |
|---|
(i) Calcining caustic wet air pollution control.
PSNS 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) | 3.329 | 1.350 | Cyanide (total) | 1.799 | 0.720 | Lead | 2.519 | 1.170 | Nickel | 4.948 | 3.329 | Ammonia (as N) | 1,199.000 | 527.200 |
|---|
(j) Pure chlorination wet air pollution control.
PSNS 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) | 14.180 | 5.748 | Cyanide (total) | 7.663 | 3.065 | Lead | 10.730 | 4.981 | Nickel | 21.007 | 14.180 | Ammonia (as N) | 5,108.000 | 2,245,000 |
|---|
(k) Reduction area-vent wet air pollution control.
PSNS 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) | 1.364 | 0.553 | Cyanide (total) | 0.737 | 0.295 | Lead | 1.032 | 0.479 | Nickel | 2.027 | 1.364 | Ammonia (as N) | 491.300 | 216.000 |
|---|
(l) Magnesium recovery off-gas wet air pollution control.
PSNS 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) | 7.671 | 3.110 | Cyanide (total) | 4.147 | 1.659 | Lead | 5.805 | 2.695 | Nickel | 11.400 | 7.671 | Ammonia (as N) | 2,764.000 | 1,215.000 |
|---|
(m) Magnesium recovery area-vent wet air pollution control.
PSNS 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) | 4.262 | 1.728 | Cyanide (total) | 2.304 | 0.921 | Lead | 3.225 | 1.497 | Nickel | 6.335 | 4.262 | Ammonia (as N) | 1,535,000 | 675.00 |
|---|
(n) Zirconium chip crushing wet air pollution control.
PSNS 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 |
|---|
(o) Acid leachate from zirconium metal production.
PSNS 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) | 10.900 | 4.420 | Cyanide (total) | 5.893 | 2.357 | Lead | 8.250 | 3.831 | Nickel | 16.210 | 10.900 | Ammonia (as N) | 3,928.000 | 1,674.00 |
|---|
(p) Acid leachate from zirconium alloy production.
PSNS 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) | 5.835 | 2.366 | Cyanide (total) | 3.154 | 1.262 | Lead | 4.416 | 2.050 | Nickel | 8.674 | 5.835 | Ammonia (as N) | 2,102.000 | 895.800 |
|---|
(q) Leaching rinse water from zirconium metal production.
PSNS 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) | 21.810 | 8.840 | Cyanide (total) | 11.790 | 4.715 | Lead | 16.500 | 7.661 | Nickel | 32.410 | 21.810 | Ammonia (as N) | 7,856.000 | 3,453.000 |
|---|
(r) Leaching rinse water from zirconium alloy production.
PSNS 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) | 0.292 | 0.118 | Cyanide (total) | 0.158 | 0.063 | Lead | 0.221 | 0.103 | Nickel | 0.434 | 0.292 | Ammonia (as N) | 105.200 | 46.240 |
|---|