40 CFR § 437.11
Effluent limitations attainable by the application of the best practicable control technology currently available (BPT)
June 9, 2020
(a) Except as provided in 40 CFR 125.30 through 125.32 or §437.10(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
BPT Limitations
Open Table
| Regulated parameter |
Maximum daily1 | Maximum monthly avg.1 |
|---|---|---|
| Conventional Parameters | ||
| O&G | 205 | 50.2 |
| pH | (2) | (2) |
| TSS | 60.0 | 31.0 |
| Metal Parameters | ||
| Antimony | 0.249 | 0.206 |
| Arsenic | 0.162 | 0.104 |
| Cadmium | 0.474 | 0.0962 |
| Chromium | 15.5 | 3.07 |
| Cobalt | 0.192 | 0.124 |
| Copper | 4.14 | 1.06 |
| Lead | 1.32 | 0.283 |
| Mercury | 0.00234 | 0.000739 |
| Nickel | 3.95 | 1.45 |
| Silver | 0.120 | 0.0351 |
| Tin | 0.409 | 0.120 |
| Titanium | 0.0947 | 0.0618 |
| Vanadium | 0.218 | 0.0662 |
| Zinc | 2.87 | 0.641 |
1mg/L (ppm).
2Within the range 6 to 9.
(b) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:
In-Plant Limitations
Open Table
| Regulated parameter |
Maximum daily1 | Maximum monthly avg.1 |
|---|---|---|
| Cyanide | 500 | 178 |
1mg/L (ppm).
[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]
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