§ 421.84 Standards of performance for new sources.
Current through Aug 22, 2025 · Read all of Part 421
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Subpart H—Zinc Reduction Furnace Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zinc reduced | ||
| Cadmium | .334 | .134 |
| Copper | 2.135 | 1.018 |
| Lead | .467 | .217 |
| Zinc | 1.702 | .701 |
| Total suspended solids | 25.020 | 20.020 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(b) Subpart H—Preleach of Zinc Concentrates.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of concentrate leached | ||
| Cadmium | .180 | .072 |
| Copper | 1.153 | .550 |
| Lead | .252 | .117 |
| Zinc | .919 | .378 |
| Total suspended solids | 13.520 | 10.810 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(c) Subpart H—Leaching Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zinc processed through leaching | ||
| Cadmium | .000 | .000 |
| Copper | .000 | .000 |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
| Total suspended solids | .000 | .000 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(d) Subpart H—Electrolyte Bleed Wastewater.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode zinc produced | ||
| Cadmium | .086 | .035 |
| Copper | .553 | .264 |
| Lead | .121 | .056 |
| Zinc | .441 | .182 |
| Total suspended solids | 6.480 | 5.184 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(e) Subpart H—Cathode and Anode Wash Wastewater.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode zinc produced | ||
| Cadmium | .150 | .060 |
| Copper | .961 | .458 |
| Lead | .210 | .098 |
| Zinc | .766 | .315 |
| Total suspended solids | 11.270 | 9.012 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(f) Subpart H—Casting Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zinc cast | ||
| Cadmium | .051 | .021 |
| Copper | .329 | .157 |
| Lead | .072 | .033 |
| Zinc | .262 | .108 |
| Total suspended solids | 3.855 | 3.084 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(g) Subpart H—Casting Contact Cooling.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of zinc cast | ||
| Cadmium | .036 | .014 |
| Copper | .232 | .110 |
| Lead | .051 | .024 |
| Zinc | .185 | .076 |
| Total suspended solids | 2.715 | 2.172 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(h) Subpart H—Cadmium Plant Wastewater.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cadmium produced | ||
| Cadmium | 1.234 | .494 |
| Copper | 7.899 | 3.765 |
| Lead | 1.728 | .802 |
| Zinc | 6.295 | 2.592 |
| Total suspended solids | 92.570 | 74.050 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
[49 FR 8808, Mar. 8, 1984; 49 FR 26739, June 29, 1984, as amended at 49 FR 29795, July 24, 1984]