40 CFR § 421.244
Standards of performance for new sources
June 9, 2020
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Slag reclaim tailings.
NSPS for the Secondary Nickel Subcategory
Open Table
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of slag input to reclaim process | ||
| Chromium (total) | 5.653 | 2.313 |
| Copper | 24.410 | 12.850 |
| Nickel | 24.670 | 16.320 |
| Total suspended solids | 526.800 | 250.500 |
| pH | (1) | (1) |
1Within the range of 7.5 to 10.0 at all times.
(b) Acid reclaim leaching filtrate.
NSPS for the Secondary Nickel Subcategory
Open Table
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of acid reclaim nickel produced | ||
| Chromium (total) | 2.198 | 0.899 |
| Copper | 9.491 | 4.995 |
| Nickel | 9.590 | 6.344 |
| Total suspended solids | 204.800 | 97.400 |
| pH | (1) | (1) |
1Within the range of 7.5 to 10.0 at all times.
(c) Acid reclaim leaching belt filter backwash.
NSPS for the Secondary Nickel Subcategory
Open Table
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of acid reclaim nickel produced | ||
| Chromium (total) | 0.528 | 0.216 |
| Copper | 2.278 | 1.199 |
| Nickel | 2.302 | 1.523 |
| Total suspended solids | 49.160 | 23.380 |
| pH | (1) | (1) |
1Within the range of 7.5 to 10.0 at all times.
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