437.21—Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).
Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
| Regulatedparameter | Maximum daily 1 | Maximum monthly avg. 1 |
|---|---|---|
| Conventional Parameters | ||
| O&G | 127 | 38.0 |
| pH | (2) | (2) |
| TSS | 74.1 | 30.6 |
| Metal Parameters | ||
| Arsenic | 2.95 | 1.33 |
| Cadmium | 0.0172 | 0.0102 |
| Chromium | 0.746 | 0.323 |
| Cobalt | 56.4 | 18.8 |
| Copper | 0.500 | 0.242 |
| Lead | 0.350 | 0.160 |
| Mercury | 0.0172 | 0.00647 |
| Tin | 0.335 | 0.165 |
| Zinc | 8.26 | 4.50 |
| Organic Parameters | ||
| Bis(2-ethylhexyl) phthalate | 0.215 | 0.101 |
| Butylbenzyl phthalate | 0.188 | 0.0887 |
| Carbazole | 0.598 | 0.276 |
| n-Decane | 0.948 | 0.437 |
| Fluoranthene | 0.0537 | 0.0268 |
| n-Octadecane | 0.589 | 0.302 |
| 1 mg/L (ppm). | ||
| 2 Within the range 6 to 9. | ||
Code of Federal Regulations
Except as provided in 40 CFR 125.30 through 125.32 or 437.20(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
| Regulatedparameter | Maximum daily 1 | Maximum monthly avg. 1 |
|---|---|---|
| Conventional Parameters | ||
| O&G | 127 | 38.0 |
| pH | (2) | (2) |
| TSS | 74.1 | 30.6 |
| Metal Parameters | ||
| Arsenic | 2.95 | 1.33 |
| Cadmium | 0.0172 | 0.0102 |
| Chromium | 0.746 | 0.323 |
| Cobalt | 56.4 | 18.8 |
| Copper | 0.500 | 0.242 |
| Lead | 0.350 | 0.160 |
| Mercury | 0.0172 | 0.00647 |
| Tin | 0.335 | 0.165 |
| Zinc | 8.26 | 4.50 |
| Organic Parameters | ||
| Bis(2-ethylhexyl) phthalate | 0.215 | 0.101 |
| Butylbenzyl phthalate | 0.188 | 0.0887 |
| Carbazole | 0.598 | 0.276 |
| n-Decane | 0.948 | 0.437 |
| Fluoranthene | 0.0537 | 0.0268 |
| n-Octadecane | 0.589 | 0.302 |
| 1 mg/L (ppm). | ||
| 2 Within the range 6 to 9. | ||