View all text of Subpart X [§ 421.260 - § 421.267]
§ 421.264 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Furnace wet air pollution control.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of precious metals, including silver, incinerated or smelted | Copper | 5.760 | 2.745 | Cyanide (total) | 0.900 | 0.360 | Zinc | 4.590 | 1.890 | Combined metals | 1.350 | Ammonia (as N) | 599.900 | 263.700 | Total suspended solids | 67.500 | 54.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(b) Raw material granulation.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of precious metals in the granulated raw material | Copper | 0.819 | 0.390 | Cyanide (total) | 0.128 | 0.051 | Zinc | 0.653 | 0.269 | Combined metals | 0.192 | Ammonia (as N) | 85.310 | 37.500 | Total suspended solids | 9.600 | 7.680 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(c) Spent plating solutions.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/liter of spent plating solution used as a raw material | Copper | 1.280 | 0.610 | Cyanide (total) | 0.200 | 0.080 | Zinc | 1.020 | 0.420 | Combined metals | 0.300 | Ammonia (as N) | 133.300 | 58.600 | Total suspended solids | 15.000 | 12.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(d) Spent cyanide stripping solutions.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of gold produced by cyanide stripping | Copper | 4.736 | 2.257 | Cyanide (total) | 0.740 | 0.296 | Zinc | 3.774 | 1.554 | Combined metals | 1.11 | Ammonia (as N) | 493.200 | 216.800 | Total suspended solids | 55.500 | 44.400 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(e) Refinery wet air pollution control
2.
2 This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of precious metals, including silver, produced in refinery | Copper | 1.280 | 0.610 | Cyanide (total) | 0.200 | 0.080 | Zinc | 1.020 | 0.420 | Combined metals | 0.300 | Ammonia (as N) | 133.300 | 58.600 | Total suspended solids | 15.000 | 12.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(f) Gold solvent extraction raffinate and wash water.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of gold produced by solvent extraction | Copper | 0.806 | 0.384 | Cyanide (total) | 0.126 | 0.050 | Zinc | 0.643 | 0.265 | Combined metals | 0.189 | Ammonia (as N) | 83.980 | 36.920 | Total suspended solids | 9.450 | 7.560 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(g) Gold spent electrolyte.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of gold produced by electrolysis | Copper | 0.011 | 0.005 | Cyanide (total) | 0.002 | 0.001 | Combined metals | 0.003 | Zinc | 0.009 | 0.004 | Ammonia (as N) | 1.160 | 0.510 | Total suspended solids | 0.131 | 0.104 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(h) Gold precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of gold precipitated | Copper | 5.632 | 2.684 | Cyanide (total) | 0.880 | 0.352 | Zinc | 4.488 | 1.848 | Combined metals | 1.320 | Ammonia (as N) | 586.500 | 257.800 | Total suspended solids | 66.00 | 52.800 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(i) Platinum precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of platinum precipitated | Copper | 6.656 | 3.172 | Cyanide (total) | 1.040 | 0.416 | Zinc | 5.304 | 2.184 | Combined metals | 1.560 | Ammonia (as N) | 693.200 | 304.700 | Total suspended solids | 78.000 | 62.400 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(j) Palladium precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of palladium precipitated | Copper | 7.680 | 3.660 | Cyanide (total) | 1.200 | 0.480 | Zinc | 6.1200 | 2.520 | Combined metals | 1.800 | Ammonia (as N) | 799.800 | 351.600 | Total suspended solids | 90.000 | 72.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.00 at all times.
(k) Other platinum group metals precipitation and filtration.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of other platinum group metals precipitated | Copper | 6.656 | 3.172 | Cyanide (total) | 1.040 | 0.416 | Zinc | 5.304 | 2.184 | Combined metals | 1.560 | Ammonia (as N) | 693.200 | 304.700 | Total suspended solids | 78.000 | 62.400 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(l) Spent solution from PGC salt production.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of gold contained in PGC product | Copper | 1.152 | 0.549 | Cyanide (total) | 0.180 | 0.072 | Zinc | 0.918 | 0.378 | Combined metals | 0.270 | Ammonia (as N) | 120.000 | 52.740 | Total suspended solids | 13.500 | 10.800 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(m) Equipment and floor wash.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of precious metals, including silver, produced in refinery | Copper | 0.000 | 0.000 | Cyanide (total) | 0.000 | 0.000 | Zinc | 0.000 | 0.000 | Combined metals | 0.000 | Ammonia (as N) | 0.000 | 0.000 | Total suspended solids | 0.000 | 0.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(n) Preliminary treatment.
NSPS for the Secondary Precious Metals Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of total precious metals produced through this operation | Copper | 64.000 | 30.500 | Cyanide (Total) | 10.000 | 4.000 | Zinc | 51.000 | 21.000 | Combined metals | 15.000 | Ammonia (as N) | 6665.000 | 2930.000 | Total Suspended Solids | 750.000 | 600.000 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.